From a1ab4c317abfd045fe0619b455a31e19f910f7e7 Mon Sep 17 00:00:00 2001
From: Arnaud Charlet <charlet@gcc.gnu.org>
Date: Tue, 29 Jul 2008 17:46:37 +0200
Subject: [PATCH] gcc-interface: New directory.

	* gcc-interface: New directory.

	* ada-tree.def, cuintp.c, gigi.h, Makefile.in, targtyps.c, ada.h,
	utils.c, ada-tree.h, decl.c, lang.opt, Make-lang.in, trans.c,
	config-lang.in, deftarg.c, lang-specs.h, misc.c, utils2.c: Moved
	to gcc-interface subdirectory.

From-SVN: r138246
---
 gcc/ada/Makefile.in                  | 2297 +-------
 gcc/ada/config-lang.in               |   35 +-
 gcc/ada/gcc-interface/Make-lang.in   | 4309 +++++++++++++++
 gcc/ada/gcc-interface/Makefile.in    | 2295 ++++++++
 gcc/ada/gcc-interface/ada-tree.def   |   81 +
 gcc/ada/gcc-interface/ada-tree.h     |  321 ++
 gcc/ada/gcc-interface/ada.h          |   80 +
 gcc/ada/gcc-interface/config-lang.in |   43 +
 gcc/ada/gcc-interface/cuintp.c       |  142 +
 gcc/ada/gcc-interface/decl.c         | 7648 ++++++++++++++++++++++++++
 gcc/ada/gcc-interface/deftarg.c      |   40 +
 gcc/ada/gcc-interface/gigi.h         |  905 +++
 gcc/ada/gcc-interface/lang-specs.h   |   48 +
 gcc/ada/gcc-interface/lang.opt       |  102 +
 gcc/ada/gcc-interface/misc.c         |  876 +++
 gcc/ada/gcc-interface/targtyps.c     |  230 +
 gcc/ada/gcc-interface/trans.c        | 7091 ++++++++++++++++++++++++
 gcc/ada/gcc-interface/utils.c        | 4895 +++++++++++++++++
 gcc/ada/gcc-interface/utils2.c       | 2219 ++++++++
 19 files changed, 31338 insertions(+), 2319 deletions(-)
 create mode 100644 gcc/ada/gcc-interface/Make-lang.in
 create mode 100644 gcc/ada/gcc-interface/Makefile.in
 create mode 100644 gcc/ada/gcc-interface/ada-tree.def
 create mode 100644 gcc/ada/gcc-interface/ada-tree.h
 create mode 100644 gcc/ada/gcc-interface/ada.h
 create mode 100644 gcc/ada/gcc-interface/config-lang.in
 create mode 100644 gcc/ada/gcc-interface/cuintp.c
 create mode 100644 gcc/ada/gcc-interface/decl.c
 create mode 100644 gcc/ada/gcc-interface/deftarg.c
 create mode 100644 gcc/ada/gcc-interface/gigi.h
 create mode 100644 gcc/ada/gcc-interface/lang-specs.h
 create mode 100644 gcc/ada/gcc-interface/lang.opt
 create mode 100644 gcc/ada/gcc-interface/misc.c
 create mode 100644 gcc/ada/gcc-interface/targtyps.c
 create mode 100644 gcc/ada/gcc-interface/trans.c
 create mode 100644 gcc/ada/gcc-interface/utils.c
 create mode 100644 gcc/ada/gcc-interface/utils2.c

diff --git a/gcc/ada/Makefile.in b/gcc/ada/Makefile.in
index 6c9db7c09fa..9f223c4195c 100644
--- a/gcc/ada/Makefile.in
+++ b/gcc/ada/Makefile.in
@@ -1,2296 +1,3 @@
-# Makefile for GNU Ada Compiler (GNAT).
-#   Copyright (C) 1994-2008 Free Software Foundation, Inc.
-
-#This file is part of GCC.
-
-#GCC is free software; you can redistribute it and/or modify
-#it under the terms of the GNU General Public License as published by
-#the Free Software Foundation; either version 3, or (at your option)
-#any later version.
-
-#GCC is distributed in the hope that it will be useful,
-#but WITHOUT ANY WARRANTY; without even the implied warranty of
-#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-#GNU General Public License for more details.
-
-#You should have received a copy of the GNU General Public License
-#along with GCC; see the file COPYING3.  If not see
-#<http://www.gnu.org/licenses/>.
-
-# The makefile built from this file lives in the language subdirectory.
-# Its purpose is to provide support for:
-#
-# 1) recursion where necessary, and only then (building .o's), and
-# 2) building and debugging cc1 from the language subdirectory, and
-# 3) nothing else.
-#
-# The parent makefile handles all other chores, with help from the
-# language makefile fragment, of course.
-#
-# The targets for external use are:
-# all, TAGS, ???mostlyclean, ???clean.
-
-# This makefile will only work with Gnu make.
-# The rules are written assuming a minimum subset of tools are available:
-#
-# Required:
-#      MAKE:    Only Gnu make will work.
-#      MV:      Must accept (at least) one, maybe wildcard, source argument,
-#               a file or directory destination, and support creation/
-#               modification date preservation.  Gnu mv -f works.
-#      RM:      Must accept an arbitrary number of space separated file
-#               arguments, or one wildcard argument. Gnu rm works.
-#      RMDIR:   Must delete a directory and all its contents. Gnu rm -rf works.
-#      ECHO:    Must support command line redirection. Any Unix-like
-#               shell will typically provide this, otherwise a custom version
-#               is trivial to write.
-#      AR:      Gnu ar works.
-#      MKDIR:   Gnu mkdir works.
-#      CHMOD:   Gnu chmod works.
-#      true:    Does nothing and returns a normal successful return code.
-#      pwd:     Prints the current directory on stdout.
-#      cd:      Change directory.
-#
-# Optional:
-#      BISON:   Gnu bison works.
-#      FLEX:    Gnu flex works.
-#      Other miscellaneous tools for obscure targets.
-
-# Suppress smart makes who think they know how to automake Yacc files
-.y.c:
-
-# Variables that exist for you to override.
-# See below for how to change them for certain systems.
-
-# Various ways of specifying flags for compilations:
-# CFLAGS is for the user to override to, e.g., do a bootstrap with -O2.
-# BOOT_CFLAGS is the value of CFLAGS to pass
-# to the stage2 and stage3 compilations
-# XCFLAGS is used for most compilations but not when using the GCC just built.
-XCFLAGS =
-CFLAGS = -g
-BOOT_CFLAGS = -O $(CFLAGS)
-# These exists to be overridden by the x-* and t-* files, respectively.
-X_CFLAGS =
-T_CFLAGS =
-
-X_CPPFLAGS =
-T_CPPFLAGS =
-
-X_ADA_CFLAGS =
-T_ADA_CFLAGS =
-
-X_ADAFLAGS =
-T_ADAFLAGS =
-
-CC = cc
-BISON = bison
-BISONFLAGS =
-ECHO = echo
-LEX = flex
-LEXFLAGS =
-CHMOD = chmod
-LN = ln
-LN_S = ln -s
-CP = cp -p
-MV = mv -f
-RM = rm -f
-RMDIR = rm -rf
-MKDIR = mkdir -p
-AR = ar
-AR_FLAGS = rc
-LS = ls
-RANLIB = @RANLIB@
-RANLIB_FLAGS = @ranlib_flags@
-
-SHELL = @SHELL@
-PWD_COMMAND = $${PWDCMD-pwd}
-# How to copy preserving the date
-INSTALL_DATA_DATE = cp -p
-MAKEINFO = makeinfo
-TEXI2DVI = texi2dvi
-TEXI2PDF = texi2pdf
-GNATBIND_FLAGS = -static -x
-ADA_CFLAGS =
-ADAFLAGS = -W -Wall -gnatpg -gnata
-SOME_ADAFLAGS =-gnata
-FORCE_DEBUG_ADAFLAGS = -g
-GNATLIBFLAGS = -gnatpg -nostdinc
-GNATLIBCFLAGS = -g -O2
-GNATLIBCFLAGS_FOR_C = $(GNATLIBCFLAGS) $(TARGET_LIBGCC2_CFLAGS) -fexceptions \
-	-DIN_RTS
-ALL_ADA_CFLAGS = $(X_ADA_CFLAGS) $(T_ADA_CFLAGS) $(ADA_CFLAGS)
-ALL_ADAFLAGS = $(CFLAGS) $(ALL_ADA_CFLAGS) $(X_ADAFLAGS) $(T_ADAFLAGS) \
-	$(ADAFLAGS)
-MOST_ADAFLAGS = $(CFLAGS) $(ALL_ADA_CFLAGS) $(X_ADAFLAGS) $(T_ADAFLAGS) \
-	$(SOME_ADAFLAGS)
-THREAD_KIND = native
-THREADSLIB =
-GMEM_LIB =
-MISCLIB =
-SYMDEPS = $(LIBINTL_DEP)
-OUTPUT_OPTION = @OUTPUT_OPTION@
-
-objext = .o
-exeext =
-arext  = .a
-soext  = .so
-shext  =
-hyphen = -
-
-# Define this as & to perform parallel make on a Sequent.
-# Note that this has some bugs, and it seems currently necessary
-# to compile all the gen* files first by hand to avoid erroneous results.
-P =
-
-# This is used instead of ALL_CFLAGS when compiling with GCC_FOR_TARGET.
-# It omits XCFLAGS, and specifies -B./.
-# It also specifies -B$(tooldir)/ to find as and ld for a cross compiler.
-GCC_CFLAGS = $(INTERNAL_CFLAGS) $(X_CFLAGS) $(T_CFLAGS) $(CFLAGS)
-
-# Tools to use when building a cross-compiler.
-# These are used because `configure' appends `cross-make'
-# to the makefile when making a cross-compiler.
-
-# We don't use cross-make.  Instead we use the tools from the build tree,
-# if they are available.
-# program_transform_name and objdir are set by configure.in.
-program_transform_name =
-objdir = .
-
-target_alias=@target_alias@
-target=@target@
-xmake_file = @xmake_file@
-tmake_file = @tmake_file@
-host_canonical=@host@
-#version=`sed -e 's/.*\"\([^ \"]*\)[ \"].*/\1/' < $(srcdir)/version.c`
-#mainversion=`sed -e 's/.*\"\([0-9]*\.[0-9]*\).*/\1/' < $(srcdir)/version.c`
-
-# Directory where sources are, from where we are.
 srcdir = @srcdir@
-VPATH = $(srcdir)
-
-fsrcdir := $(shell cd $(srcdir);${PWD_COMMAND})
-fsrcpfx := $(shell cd $(srcdir);${PWD_COMMAND})/
-fcurdir := $(shell ${PWD_COMMAND})
-fcurpfx := $(shell ${PWD_COMMAND})/
-
-# Top build directory, relative to here.
-top_builddir = ../..
-
-# Internationalization library.
-LIBINTL = @LIBINTL@
-LIBINTL_DEP = @LIBINTL_DEP@
-
-# Any system libraries needed just for GNAT.
-SYSLIBS = @GNAT_LIBEXC@
-
-# List of extra object files linked in with various programs.
-EXTRA_GNATTOOLS_OBJS = ../../prefix.o ../../version.o
-
-# List of target dependent sources, overridden below as necessary
-TARGET_ADA_SRCS =
-
-# Type of tools build we are doing; default is not compiling tools.
-TOOLSCASE =
-
-# End of variables for you to override.
-
-all: all.indirect
-
-# This tells GNU Make version 3 not to put all variables in the environment.
-.NOEXPORT:
-
-# tmake_file and xmake_file expand to lists with entries of the form
-# $(srcdir)/config/...  but here $(srcdir) is the ada subdirectory so we
-# need to adjust the paths.  There can't be spaces in the subst arguments
-# or we get spurious spaces in the actual list of files to include.
-
-# target overrides
-ifneq ($(tmake_file),)
-include $(subst /config,/../config,$(tmake_file))
-endif
-
-# host overrides
-ifneq ($(xmake_file),)
-include $(subst /config,/../config,$(xmake_file))
-endif
-
-# Now figure out from those variables how to compile and link.
-
-all.indirect: Makefile ../gnat1$(exeext)
-
-# IN_GCC distinguishes between code compiled into GCC itself and other
-# programs built during a bootstrap.
-# autoconf inserts -DCROSS_DIRECTORY_STRUCTURE if we are building a cross
-# compiler which does not use the native libraries and headers.
-INTERNAL_CFLAGS = @CROSS@ -DIN_GCC
-
-# This is the variable actually used when we compile.
-LOOSE_CFLAGS = `echo $(CFLAGS) $(WARN2_CFLAGS)|sed -e 's/-pedantic//g' -e 's/-Wtraditional//g'`
-ALL_CFLAGS = $(INTERNAL_CFLAGS) $(X_CFLAGS) $(T_CFLAGS) $(LOOSE_CFLAGS) \
-	$(XCFLAGS)
-
-# Likewise.
-ALL_CPPFLAGS = $(CPPFLAGS) $(X_CPPFLAGS) $(T_CPPFLAGS)
-
-# This is where we get libiberty.a from.
-LIBIBERTY = ../../libiberty/libiberty.a
-
-# How to link with both our special library facilities
-# and the system's installed libraries.
-LIBS = $(LIBINTL) $(LIBIBERTY) $(SYSLIBS)
-LIBDEPS = $(LIBINTL_DEP) $(LIBIBERTY)
-# Default is no TGT_LIB; one might be passed down or something
-TGT_LIB =
-TOOLS_LIBS = $(EXTRA_GNATTOOLS_OBJS) targext.o link.o $(LIBGNAT) ../../../libiberty/libiberty.a $(SYSLIBS) $(TGT_LIB)
-
-# Specify the directories to be searched for header files.
-# Both . and srcdir are used, in that order,
-# so that tm.h and config.h will be found in the compilation
-# subdirectory rather than in the source directory.
-INCLUDES = -I- -I. -I.. -I$(srcdir) -I$(srcdir)/.. -I$(srcdir)/../config \
-	-I$(srcdir)/../../include
-
-ADA_INCLUDES = -I- -I. -I$(srcdir)
-
-INCLUDES_FOR_SUBDIR = -I. -I.. -I../.. -I$(fsrcdir) -I$(fsrcdir)/../config \
-	-I$(fsrcdir)/../../include -I$(fsrcdir)/..
-ADA_INCLUDES_FOR_SUBDIR = -I. -I$(fsrcdir)
-
-# Avoid a lot of time thinking about remaking Makefile.in and *.def.
-.SUFFIXES: .in .def
-
-# Say how to compile Ada programs.
-.SUFFIXES: .ada .adb .ads .asm
-
-# Always use -I$(srcdir)/config when compiling.
-.asm.o:
-	$(CC) -c -x assembler $< $(OUTPUT_OPTION)
-
-.c.o:
-	$(CC) -c $(ALL_CFLAGS) $(ADA_CFLAGS) $(ALL_CPPFLAGS) $(INCLUDES) $< \
-	  $(OUTPUT_OPTION)
-
-.adb.o:
-	$(CC) -c $(ALL_ADAFLAGS) $(ADA_INCLUDES) $< $(OUTPUT_OPTION)
-
-.ads.o:
-	$(CC) -c $(ALL_ADAFLAGS) $(ADA_INCLUDES) $< $(OUTPUT_OPTION)
-
-# how to regenerate this file
-Makefile: ../config.status $(srcdir)/Makefile.in $(srcdir)/../version.c
-	cd ..; \
-	LANGUAGES="$(CONFIG_LANGUAGES)" \
-	CONFIG_HEADERS= \
-	CONFIG_FILES=ada/Makefile $(SHELL) config.status
-
-# This tells GNU make version 3 not to export all the variables
-# defined in this file into the environment.
-.NOEXPORT:
-
-# Lists of files for various purposes.
-
-GNATLINK_OBJS = gnatlink.o \
- a-except.o ali.o alloc.o butil.o casing.o csets.o debug.o fmap.o fname.o \
- gnatvsn.o hostparm.o indepsw.o interfac.o i-c.o i-cstrin.o namet.o opt.o \
- osint.o output.o rident.o s-exctab.o s-secsta.o s-stalib.o s-stoele.o \
- sdefault.o snames.o stylesw.o switch.o system.o table.o targparm.o tree_io.o \
- types.o validsw.o widechar.o
-
-GNATMAKE_OBJS = a-except.o ali.o ali-util.o s-casuti.o \
- alloc.o atree.o binderr.o butil.o casing.o csets.o debug.o elists.o einfo.o\
- erroutc.o errutil.o err_vars.o fmap.o fname.o fname-uf.o fname-sf.o \
- gnatmake.o gnatvsn.o hostparm.o interfac.o i-c.o i-cstrin.o krunch.o lib.o \
- make.o makeusg.o makeutl.o mlib.o mlib-fil.o mlib-prj.o mlib-tgt.o \
- mlib-tgt-specific.o mlib-utl.o namet.o nlists.o opt.o osint.o osint-m.o output.o \
- prj.o prj-attr.o prj-attr-pm.o prj-com.o prj-dect.o prj-env.o prj-err.o prj-ext.o prj-nmsc.o \
- prj-pars.o prj-part.o prj-proc.o prj-strt.o prj-tree.o prj-util.o \
- rident.o s-exctab.o s-secsta.o s-stalib.o s-stoele.o \
- scans.o scng.o sdefault.o sfn_scan.o s-purexc.o s-htable.o \
- sinfo.o sinput.o sinput-c.o sinput-p.o \
- snames.o stand.o stringt.o styleg.o stylesw.o system.o validsw.o switch.o switch-m.o \
- table.o targparm.o tempdir.o tree_io.o types.o \
- uintp.o uname.o urealp.o usage.o widechar.o \
- $(EXTRA_GNATMAKE_OBJS)
-
-# Convert the target variable into a space separated list of architecture,
-# manufacturer, and operating system and assign each of those to its own
-# variable.
-
-host:=$(subst -, ,$(host_canonical))
-targ:=$(subst -, ,$(target))
-arch:=$(word 1,$(targ))
-ifeq ($(words $(targ)),2)
-  manu:=
-  osys:=$(word 2,$(targ))
-else
-  manu:=$(word 2,$(targ))
-  osys:=$(word 3,$(targ))
-endif
-
-# LIBGNAT_TARGET_PAIRS is a list of pairs of filenames.
-# The members of each pair must be separated by a '<' and no whitespace.
-# Each pair must be separated by some amount of whitespace from the following
-# pair.
-
-# Non-tasking case:
-
-LIBGNAT_TARGET_PAIRS = \
-a-intnam.ads<a-intnam-dummy.ads \
-s-inmaop.adb<s-inmaop-dummy.adb \
-s-intman.adb<s-intman-dummy.adb \
-s-osinte.ads<s-osinte-dummy.ads \
-s-osprim.adb<s-osprim-posix.adb \
-s-taprop.adb<s-taprop-dummy.adb \
-s-taspri.ads<s-taspri-dummy.ads
-
-# When using the GCC exception handling mechanism, we need to use an
-# alternate body for a-exexpr.adb (a-exexpr-gcc.adb)
-
-EH_MECHANISM=
-
-# Default shared object option. Note that we rely on the fact that the "soname"
-# option will always be present and last in this flag, so that we can have
-# $(SO_OPTS)libgnat-x.xx
-
-SO_OPTS = -Wl,-soname,
-
-# Default gnatlib-shared target.
-# By default, equivalent to gnatlib.
-# Set to gnatlib-shared-default, gnatlib-shared-dual, or a platform specific
-# target when supported.
-GNATLIB_SHARED = gnatlib
-
-# default value for gnatmake's target dependent file
-MLIB_TGT = mlib-tgt
-
-# By default, do not distribute prefix.o (in libgccprefix), since it is only
-# needed by external GNAT tools such as gnatdist and Glide.
-# Override this variable on native platforms when needed.
-PREFIX_OBJS =
-
-# To avoid duplicate code, use this variable to set PREFIX_OBJS when needed:
-PREFIX_REAL_OBJS = ../prefix.o \
-  ../../libiberty/concat.o     \
-  ../../libiberty/xmalloc.o    \
-  ../../libiberty/xstrdup.o    \
-  ../../libiberty/xexit.o
-
-LIB_VERSION = $(strip $(shell grep ' Library_Version :' $(fsrcpfx)gnatvsn.ads | sed -e 's/.*"\(.*\)".*/\1/'))
-
-# $(filter-out PATTERN...,TEXT) removes all PATTERN words from TEXT.
-# $(strip STRING) removes leading and trailing spaces from STRING.
-# If what's left is null then it's a match.
-
-ifeq ($(strip $(filter-out m68k% wrs vx%,$(targ))),)
-  LIBGNAT_TARGET_PAIRS = \
-  a-intnam.ads<a-intnam-vxworks.ads \
-  a-numaux.ads<a-numaux-vxworks.ads \
-  s-inmaop.adb<s-inmaop-posix.adb \
-  s-interr.adb<s-interr-vxworks.adb \
-  s-intman.ads<s-intman-vxworks.ads \
-  s-intman.adb<s-intman-vxworks.adb \
-  s-osinte.adb<s-osinte-vxworks.adb \
-  s-osinte.ads<s-osinte-vxworks.ads \
-  s-osprim.adb<s-osprim-vxworks.adb \
-  s-parame.ads<s-parame-vxworks.ads \
-  s-parame.adb<s-parame-vxworks.adb \
-  s-stchop.ads<s-stchop-limit.ads \
-  s-stchop.adb<s-stchop-vxworks.adb \
-  s-taprop.adb<s-taprop-vxworks.adb \
-  s-taspri.ads<s-taspri-vxworks.ads \
-  s-tpopsp.adb<s-tpopsp-vxworks.adb \
-  s-vxwork.ads<s-vxwork-m68k.ads \
-  g-soccon.ads<g-soccon-vxworks.ads \
-  g-socthi.ads<g-socthi-vxworks.ads \
-  g-socthi.adb<g-socthi-vxworks.adb \
-  g-stsifd.adb<g-stsifd-sockets.adb \
-  g-sttsne.adb<g-sttsne-vxworks.adb \
-  g-sttsne.ads<g-sttsne-locking.ads \
-  system.ads<system-vxworks-m68k.ads
-
-  TOOLS_TARGET_PAIRS=mlib-tgt-specific.adb<mlib-tgt-specific-vxworks.adb
-
-  EXTRA_GNATRTL_NONTASKING_OBJS=i-vxwork.o i-vxwoio.o
-  EXTRA_GNATRTL_TASKING_OBJS=s-vxwork.o
-
-  EXTRA_LIBGNAT_SRCS+=vx_stack_info.c
-  EXTRA_LIBGNAT_OBJS+=vx_stack_info.o
-
-  ifeq ($(strip $(filter-out yes,$(TRACE))),)
-    LIBGNAT_TARGET_PAIRS += \
-    s-traces.adb<s-traces-default.adb \
-    s-tratas.adb<s-tratas-default.adb \
-    s-trafor.adb<s-trafor-default.adb \
-    s-trafor.ads<s-trafor-default.ads \
-    s-tfsetr.adb<s-tfsetr-vxworks.adb
-  endif
-endif
-
-ifeq ($(strip $(filter-out powerpc% wrs vxworks,$(targ))),)
-  LIBGNAT_TARGET_PAIRS = \
-  a-intnam.ads<a-intnam-vxworks.ads \
-  a-numaux.ads<a-numaux-vxworks.ads \
-  s-inmaop.adb<s-inmaop-posix.adb \
-  s-intman.ads<s-intman-vxworks.ads \
-  s-intman.adb<s-intman-vxworks.adb \
-  s-osprim.adb<s-osprim-vxworks.adb \
-  s-parame.ads<s-parame-vxworks.ads \
-  s-parame.adb<s-parame-vxworks.adb \
-  s-stchop.ads<s-stchop-limit.ads \
-  s-stchop.adb<s-stchop-vxworks.adb \
-  s-taprop.adb<s-taprop-vxworks.adb \
-  s-taspri.ads<s-taspri-vxworks.ads \
-  s-vxwork.ads<s-vxwork-ppc.ads \
-  g-soccon.ads<g-soccon-vxworks.ads \
-  g-socthi.ads<g-socthi-vxworks.ads \
-  g-socthi.adb<g-socthi-vxworks.adb \
-  g-stsifd.adb<g-stsifd-sockets.adb \
-  g-sttsne.adb<g-sttsne-vxworks.adb \
-  g-sttsne.ads<g-sttsne-locking.ads
-
-  TOOLS_TARGET_PAIRS=mlib-tgt-specific.adb<mlib-tgt-specific-vxworks.adb
-
-  ifeq ($(strip $(filter-out yes,$(TRACE))),)
-    LIBGNAT_TARGET_PAIRS += \
-    s-traces.adb<s-traces-default.adb \
-    s-trafor.adb<s-trafor-default.adb \
-    s-trafor.ads<s-trafor-default.ads \
-    s-tratas.adb<s-tratas-default.adb \
-    s-tfsetr.adb<s-tfsetr-vxworks.adb
-  endif
-
-  ifeq ($(strip $(filter-out rtp,$(THREAD_KIND))),)
-    LIBGNAT_TARGET_PAIRS += \
-    s-osinte.adb<s-osinte-vxworks-rtp.adb \
-    s-osinte.ads<s-osinte-vxworks6.ads \
-    s-tpopsp.adb<s-tpopsp-vxworks-rtp.adb \
-    system.ads<system-vxworks-ppc-rtp.ads
-
-    EXTRA_GNATRTL_NONTASKING_OBJS=s-vxwexc.o
-  else
-    LIBGNAT_TARGET_PAIRS += \
-    s-interr.adb<s-interr-vxworks.adb \
-    s-tpopsp.adb<s-tpopsp-vxworks.adb \
-    system.ads<system-vxworks-ppc.ads
-
-    ifeq ($(strip $(filter-out kernel,$(THREAD_KIND))),)
-      LIBGNAT_TARGET_PAIRS += \
-      s-osinte.ads<s-osinte-vxworks6.ads \
-      s-osinte.adb<s-osinte-vxworks-kernel.adb
-    else
-      LIBGNAT_TARGET_PAIRS += \
-      s-osinte.ads<s-osinte-vxworks.ads \
-      s-osinte.adb<s-osinte-vxworks.adb
-    endif
-
-    EXTRA_GNATRTL_NONTASKING_OBJS=i-vxwork.o i-vxwoio.o s-vxwexc.o
-  endif
-
-  EXTRA_GNATRTL_TASKING_OBJS=s-vxwork.o
-
-  EXTRA_LIBGNAT_SRCS+=vx_stack_info.c
-  EXTRA_LIBGNAT_OBJS+=vx_stack_info.o
-endif
-
-# vxworksae / vxworks 653
-ifeq ($(strip $(filter-out powerpc% wrs vxworksae,$(targ))),)
-  # target pairs for kernel + vthreads runtime
-  LIBGNAT_TARGET_PAIRS = \
-  a-elchha.adb<a-elchha-vxworks-ppc-full.adb \
-  a-intnam.ads<a-intnam-vxworks.ads \
-  a-numaux.ads<a-numaux-vxworks.ads \
-  g-io.adb<g-io-vxworks-ppc-cert.adb \
-  g-io.ads<g-io-vxworks-ppc-cert.ads \
-  s-inmaop.adb<s-inmaop-posix.adb \
-  s-interr.adb<s-interr-vxworks.adb \
-  s-intman.ads<s-intman-vxworks.ads \
-  s-intman.adb<s-intman-vxworks.adb \
-  s-osinte.adb<s-osinte-vxworks.adb \
-  s-osinte.ads<s-osinte-vxworks.ads \
-  s-osprim.adb<s-osprim-vxworks.adb \
-  s-parame.ads<s-parame-ae653.ads \
-  s-parame.adb<s-parame-vxworks.adb \
-  s-taprop.adb<s-taprop-vxworks.adb \
-  s-taspri.ads<s-taspri-vxworks.ads \
-  s-tpopsp.adb<s-tpopsp-vxworks.adb \
-  s-vxwork.ads<s-vxwork-ppc.ads \
-  g-soccon.ads<g-soccon-vxworks.ads \
-  g-socthi.ads<g-socthi-vxworks.ads \
-  g-socthi.adb<g-socthi-vxworks.adb \
-  g-stsifd.adb<g-stsifd-sockets.adb \
-  g-sttsne.adb<g-sttsne-vxworks.adb \
-  g-sttsne.ads<g-sttsne-locking.ads \
-  system.ads<system-vxworks-ppc-vthread.ads
-
-  TOOLS_TARGET_PAIRS=mlib-tgt-specific.adb<mlib-tgt-specific-vxworks.adb
-
-  EXTRA_GNATRTL_NONTASKING_OBJS=i-vxwork.o i-vxwoio.o s-vxwexc.o
-  EXTRA_GNATRTL_TASKING_OBJS=s-vxwork.o
-
-  # Extra pairs for the vthreads runtime
-  ifeq ($(strip $(filter-out vthreads,$(THREAD_KIND))),)
-    LIBGNAT_TARGET_PAIRS += \
-    s-thread.adb<s-thread-ae653.adb
-    EXTRA_GNATRTL_NONTASKING_OBJS += s-thread.o
-  endif
-
-  ifeq ($(strip $(filter-out yes,$(TRACE))),)
-    LIBGNAT_TARGET_PAIRS += \
-    s-traces.adb<s-traces-default.adb \
-    s-trafor.adb<s-trafor-default.adb \
-    s-trafor.ads<s-trafor-default.ads \
-    s-tratas.adb<s-tratas-default.adb \
-    s-tfsetr.adb<s-tfsetr-vxworks.adb
-  endif
-endif
-
-ifeq ($(strip $(filter-out sparc% wrs vx%,$(targ))),)
-  LIBGNAT_TARGET_PAIRS = \
-  a-intnam.ads<a-intnam-vxworks.ads \
-  a-numaux.ads<a-numaux-vxworks.ads \
-  s-inmaop.adb<s-inmaop-posix.adb \
-  s-interr.adb<s-interr-vxworks.adb \
-  s-intman.ads<s-intman-vxworks.ads \
-  s-intman.adb<s-intman-vxworks.adb \
-  s-osinte.adb<s-osinte-vxworks.adb \
-  s-osinte.ads<s-osinte-vxworks.ads \
-  s-osprim.adb<s-osprim-vxworks.adb \
-  s-parame.ads<s-parame-vxworks.ads \
-  s-parame.adb<s-parame-vxworks.adb \
-  s-stchop.ads<s-stchop-limit.ads \
-  s-stchop.adb<s-stchop-vxworks.adb \
-  s-taprop.adb<s-taprop-vxworks.adb \
-  s-taspri.ads<s-taspri-vxworks.ads \
-  s-tpopsp.adb<s-tpopsp-vxworks.adb \
-  s-vxwork.ads<s-vxwork-sparcv9.ads \
-  g-soccon.ads<g-soccon-vxworks.ads \
-  g-socthi.ads<g-socthi-vxworks.ads \
-  g-socthi.adb<g-socthi-vxworks.adb \
-  g-stsifd.adb<g-stsifd-sockets.adb \
-  g-sttsne.adb<g-sttsne-vxworks.adb \
-  g-sttsne.ads<g-sttsne-locking.ads \
-  system.ads<system-vxworks-sparcv9.ads   \
-
-  TOOLS_TARGET_PAIRS=mlib-tgt-specific.adb<mlib-tgt-specific-vxworks.adb
-
-  EXTRA_GNATRTL_NONTASKING_OBJS=i-vxwork.o i-vxwoio.o
-  EXTRA_GNATRTL_TASKING_OBJS=s-vxwork.o
-
-  EXTRA_LIBGNAT_SRCS+=vx_stack_info.c
-  EXTRA_LIBGNAT_OBJS+=vx_stack_info.o
-endif
-
-ifeq ($(strip $(filter-out %86 wrs vxworks,$(targ))),)
-  LIBGNAT_TARGET_PAIRS = \
-  a-intnam.ads<a-intnam-vxworks.ads \
-  i-vxwork.ads<i-vxwork-x86.ads \
-  s-inmaop.adb<s-inmaop-posix.adb \
-  s-intman.ads<s-intman-vxworks.ads \
-  s-intman.adb<s-intman-vxworks.adb \
-  a-numaux.adb<a-numaux-x86.adb \
-  a-numaux.ads<a-numaux-x86.ads \
-  s-osprim.adb<s-osprim-vxworks.adb \
-  s-parame.ads<s-parame-vxworks.ads \
-  s-parame.adb<s-parame-vxworks.adb \
-  s-stchop.ads<s-stchop-limit.ads \
-  s-stchop.adb<s-stchop-vxworks.adb \
-  s-taprop.adb<s-taprop-vxworks.adb \
-  s-taspri.ads<s-taspri-vxworks.ads \
-  s-vxwork.ads<s-vxwork-x86.ads \
-  g-bytswa.adb<g-bytswa-x86.adb \
-  g-soccon.ads<g-soccon-vxworks.ads \
-  g-socthi.ads<g-socthi-vxworks.ads \
-  g-socthi.adb<g-socthi-vxworks.adb \
-  g-stsifd.adb<g-stsifd-sockets.adb \
-  g-sttsne.adb<g-sttsne-vxworks.adb \
-  g-sttsne.ads<g-sttsne-locking.ads
-
-  TOOLS_TARGET_PAIRS=mlib-tgt-specific.adb<mlib-tgt-specific-vxworks.adb
-
-  ifeq ($(strip $(filter-out yes,$(TRACE))),)
-    LIBGNAT_TARGET_PAIRS += \
-    s-traces.adb<s-traces-default.adb \
-    s-trafor.adb<s-trafor-default.adb \
-    s-trafor.ads<s-trafor-default.ads \
-    s-tratas.adb<s-tratas-default.adb \
-    s-tfsetr.adb<s-tfsetr-vxworks.adb
-  endif
-
-  ifeq ($(strip $(filter-out rtp,$(THREAD_KIND))),)
-    LIBGNAT_TARGET_PAIRS += \
-    s-osinte.adb<s-osinte-vxworks-rtp.adb \
-    s-osinte.ads<s-osinte-vxworks6.ads \
-    s-tpopsp.adb<s-tpopsp-vxworks-rtp.adb \
-    system.ads<system-vxworks-x86-rtp.ads
-
-    EXTRA_GNATRTL_NONTASKING_OBJS=s-vxwexc.o
-  else
-    LIBGNAT_TARGET_PAIRS += \
-    s-interr.adb<s-interr-vxworks.adb \
-    s-tpopsp.adb<s-tpopsp-vxworks.adb \
-    system.ads<system-vxworks-x86.ads
-
-    ifeq ($(strip $(filter-out kernel,$(THREAD_KIND))),)
-      LIBGNAT_TARGET_PAIRS += \
-      s-osinte.ads<s-osinte-vxworks6.ads \
-      s-osinte.adb<s-osinte-vxworks-kernel.adb
-    else
-      LIBGNAT_TARGET_PAIRS += \
-      s-osinte.ads<s-osinte-vxworks.ads \
-      s-osinte.adb<s-osinte-vxworks.adb
-    endif
-
-    EXTRA_GNATRTL_NONTASKING_OBJS=i-vxwork.o i-vxwoio.o s-vxwexc.o
-  endif
-
-  EXTRA_GNATRTL_TASKING_OBJS=s-vxwork.o
-
-  EXTRA_LIBGNAT_SRCS+=vx_stack_info.c
-  EXTRA_LIBGNAT_OBJS+=vx_stack_info.o
-endif
-
-ifeq ($(strip $(filter-out arm% coff wrs vx%,$(targ))),)
-  LIBGNAT_TARGET_PAIRS = \
-  a-intnam.ads<a-intnam-vxworks.ads \
-  a-numaux.ads<a-numaux-vxworks.ads \
-  s-inmaop.adb<s-inmaop-posix.adb \
-  s-interr.adb<s-interr-vxworks.adb \
-  s-intman.ads<s-intman-vxworks.ads \
-  s-intman.adb<s-intman-vxworks.adb \
-  s-osinte.adb<s-osinte-vxworks.adb \
-  s-osinte.ads<s-osinte-vxworks.ads \
-  s-osprim.adb<s-osprim-vxworks.adb \
-  s-parame.ads<s-parame-vxworks.ads \
-  s-parame.adb<s-parame-vxworks.adb \
-  s-stchop.ads<s-stchop-limit.ads \
-  s-stchop.adb<s-stchop-vxworks.adb \
-  s-taprop.adb<s-taprop-vxworks.adb \
-  s-taspri.ads<s-taspri-vxworks.ads \
-  s-tpopsp.adb<s-tpopsp-vxworks.adb \
-  s-vxwork.ads<s-vxwork-arm.ads \
-  g-soccon.ads<g-soccon-vxworks.ads \
-  g-socthi.ads<g-socthi-vxworks.ads \
-  g-socthi.adb<g-socthi-vxworks.adb \
-  g-stsifd.adb<g-stsifd-sockets.adb \
-  g-sttsne.adb<g-sttsne-vxworks.adb \
-  g-sttsne.ads<g-sttsne-locking.ads \
-  system.ads<system-vxworks-arm.ads
-
-  TOOLS_TARGET_PAIRS=mlib-tgt-specific.adb<mlib-tgt-specific-vxworks.adb
-
-  EXTRA_GNATRTL_NONTASKING_OBJS=i-vxwork.o i-vxwoio.o
-  EXTRA_GNATRTL_TASKING_OBJS=s-vxwork.o
-
-  EXTRA_LIBGNAT_SRCS+=vx_stack_info.c
-  EXTRA_LIBGNAT_OBJS+=vx_stack_info.o
-endif
-
-ifeq ($(strip $(filter-out mips% wrs vx%,$(targ))),)
-  LIBGNAT_TARGET_PAIRS = \
-  a-intnam.ads<a-intnam-vxworks.ads \
-  a-numaux.ads<a-numaux-vxworks.ads \
-  s-inmaop.adb<s-inmaop-posix.adb \
-  s-interr.adb<s-interr-vxworks.adb \
-  s-intman.ads<s-intman-vxworks.ads \
-  s-intman.adb<s-intman-vxworks.adb \
-  s-osinte.adb<s-osinte-vxworks.adb \
-  s-osinte.ads<s-osinte-vxworks.ads \
-  s-osprim.adb<s-osprim-vxworks.adb \
-  s-parame.ads<s-parame-vxworks.ads \
-  s-parame.adb<s-parame-vxworks.adb \
-  s-stchop.ads<s-stchop-limit.ads \
-  s-stchop.adb<s-stchop-vxworks.adb \
-  s-taprop.adb<s-taprop-vxworks.adb \
-  s-taspri.ads<s-taspri-vxworks.ads \
-  s-tpopsp.adb<s-tpopsp-vxworks.adb \
-  s-vxwork.ads<s-vxwork-mips.ads \
-  g-soccon.ads<g-soccon-vxworks.ads \
-  g-socthi.ads<g-socthi-vxworks.ads \
-  g-socthi.adb<g-socthi-vxworks.adb \
-  g-stsifd.adb<g-stsifd-sockets.adb \
-  g-sttsne.adb<g-sttsne-vxworks.adb \
-  g-sttsne.ads<g-sttsne-locking.ads \
-  system.ads<system-vxworks-mips.ads
-
-  TOOLS_TARGET_PAIRS=mlib-tgt-specific.adb<mlib-tgt-specific-vxworks.adb
-
-  EXTRA_GNATRTL_NONTASKING_OBJS=i-vxwork.o i-vxwoio.o
-  EXTRA_GNATRTL_TASKING_OBJS=s-vxwork.o
-
-  EXTRA_LIBGNAT_SRCS+=vx_stack_info.c
-  EXTRA_LIBGNAT_OBJS+=vx_stack_info.o
-endif
-
-ifeq ($(strip $(filter-out sparc% sun solaris%,$(targ))),)
-  LIBGNAT_TARGET_PAIRS_32 = \
-  a-intnam.ads<a-intnam-solaris.ads \
-  s-inmaop.adb<s-inmaop-posix.adb \
-  s-intman.adb<s-intman-solaris.adb \
-  s-osinte.adb<s-osinte-solaris.adb \
-  s-osinte.ads<s-osinte-solaris.ads \
-  s-osprim.adb<s-osprim-solaris.adb \
-  s-taprop.adb<s-taprop-solaris.adb \
-  s-tasinf.adb<s-tasinf-solaris.adb \
-  s-tasinf.ads<s-tasinf-solaris.ads \
-  s-taspri.ads<s-taspri-solaris.ads \
-  s-tpopsp.adb<s-tpopsp-solaris.adb \
-  g-soccon.ads<g-soccon-solaris.ads \
-  g-soliop.ads<g-soliop-solaris.ads \
-  system.ads<system-solaris-sparc.ads
-
-  LIBGNAT_TARGET_PAIRS_64 = \
-  a-intnam.ads<a-intnam-solaris.ads \
-  s-inmaop.adb<s-inmaop-posix.adb \
-  s-intman.adb<s-intman-solaris.adb \
-  s-osinte.adb<s-osinte-solaris.adb \
-  s-osinte.ads<s-osinte-solaris.ads \
-  s-osprim.adb<s-osprim-solaris.adb \
-  s-taprop.adb<s-taprop-solaris.adb \
-  s-tasinf.adb<s-tasinf-solaris.adb \
-  s-tasinf.ads<s-tasinf-solaris.ads \
-  s-taspri.ads<s-taspri-solaris.ads \
-  s-tpopsp.adb<s-tpopsp-solaris.adb \
-  g-soccon.ads<g-soccon-solaris-64.ads \
-  g-soliop.ads<g-soliop-solaris.ads \
-  system.ads<system-solaris-sparcv9.ads
-
-  ifeq ($(strip $(filter-out sparc sun solaris%,$(targ))),)
-    LIBGNAT_TARGET_PAIRS = $(LIBGNAT_TARGET_PAIRS_32)
-  else
-    LIBGNAT_TARGET_PAIRS = $(LIBGNAT_TARGET_PAIRS_64)
-  endif
-
-  TOOLS_TARGET_PAIRS=mlib-tgt-specific.adb<mlib-tgt-specific-solaris.adb
-
-  EH_MECHANISM=-gcc
-  THREADSLIB = -lposix4 -lthread
-  MISCLIB = -lposix4 -lnsl -lsocket
-  SO_OPTS = -Wl,-h,
-  GNATLIB_SHARED = gnatlib-shared-dual
-  GMEM_LIB = gmemlib
-  PREFIX_OBJS = $(PREFIX_REAL_OBJS)
-  LIBRARY_VERSION := $(LIB_VERSION)
-
-  ifeq ($(strip $(filter-out pthread PTHREAD,$(THREAD_KIND))),)
-    LIBGNAT_TARGET_PAIRS = \
-    a-intnam.ads<a-intnam-solaris.ads \
-    s-inmaop.adb<s-inmaop-posix.adb \
-    s-intman.adb<s-intman-posix.adb \
-    s-osinte.adb<s-osinte-posix.adb \
-    s-osinte.ads<s-osinte-solaris-posix.ads \
-    s-osprim.adb<s-osprim-solaris.adb \
-    s-taprop.adb<s-taprop-posix.adb \
-    s-taspri.ads<s-taspri-posix.ads \
-    s-tpopsp.adb<s-tpopsp-posix-foreign.adb \
-    g-soccon.ads<g-soccon-solaris.ads \
-    g-soliop.ads<g-soliop-solaris.ads \
-    system.ads<system-solaris-sparc.ads
-
-    THREADSLIB = -lposix4 -lpthread
-  endif
-
-  ifeq ($(strip $(filter-out m64,$(THREAD_KIND))),)
-    LIBGNAT_TARGET_PAIRS = $(LIBGNAT_TARGET_PAIRS_64)
-  endif
-endif
-
-ifeq ($(strip $(filter-out %86 solaris2%,$(arch) $(osys))),)
-  LIBGNAT_TARGET_PAIRS = \
-  a-numaux.adb<a-numaux-x86.adb \
-  a-numaux.ads<a-numaux-x86.ads \
-  a-intnam.ads<a-intnam-solaris.ads \
-  s-inmaop.adb<s-inmaop-posix.adb \
-  s-intman.adb<s-intman-solaris.adb \
-  s-osinte.adb<s-osinte-solaris.adb \
-  s-osinte.ads<s-osinte-solaris.ads \
-  s-osprim.adb<s-osprim-solaris.adb \
-  s-taprop.adb<s-taprop-solaris.adb \
-  s-tasinf.adb<s-tasinf-solaris.adb \
-  s-tasinf.ads<s-tasinf-solaris.ads \
-  s-taspri.ads<s-taspri-solaris.ads \
-  s-tpopsp.adb<s-tpopsp-solaris.adb \
-  g-bytswa.adb<g-bytswa-x86.adb \
-  g-soccon.ads<g-soccon-solaris.ads \
-  g-soliop.ads<g-soliop-solaris.ads \
-  system.ads<system-solaris-x86.ads
-
-  TOOLS_TARGET_PAIRS=mlib-tgt-specific.adb<mlib-tgt-specific-solaris.adb
-
-  EH_MECHANISM=-gcc
-  THREADSLIB = -lposix4 -lthread
-  MISCLIB = -lposix4 -lnsl -lsocket
-  SO_OPTS = -Wl,-h,
-  GNATLIB_SHARED = gnatlib-shared-dual
-  GMEM_LIB = gmemlib
-  PREFIX_OBJS = $(PREFIX_REAL_OBJS)
-  LIBRARY_VERSION := $(LIB_VERSION)
-endif
-
-ifeq ($(strip $(filter-out %86 linux%,$(arch) $(osys))),)
-  LIBGNAT_TARGET_PAIRS = \
-  a-intnam.ads<a-intnam-linux.ads \
-  a-numaux.adb<a-numaux-x86.adb \
-  a-numaux.ads<a-numaux-x86.ads \
-  g-bytswa.adb<g-bytswa-x86.adb \
-  s-inmaop.adb<s-inmaop-posix.adb \
-  s-intman.adb<s-intman-posix.adb \
-  s-osprim.adb<s-osprim-posix.adb \
-  s-taspri.ads<s-taspri-posix.ads \
-  s-tpopsp.adb<s-tpopsp-posix-foreign.adb \
-  g-sercom.adb<g-sercom-linux.adb \
-  system.ads<system-linux-x86.ads
-
-  ifeq ($(strip $(filter-out marte,$(THREAD_KIND))),)
-    LIBGNAT_TARGET_PAIRS += \
-    a-exetim.adb<a-exetim-linux-marte.adb \
-    a-exetim.ads<a-exetim-linux-marte.ads \
-    a-extiti.adb<a-extiti-linux-marte.adb \
-    a-extiti.ads<a-extiti-linux-marte.ads \
-    a-rttiev.adb<a-rttiev-linux-marte.adb \
-    a-rttiev.ads<a-rttiev-linux-marte.ads \
-    g-soccon.ads<g-soccon-linux-x86-marte.ads \
-    s-osinte.adb<s-osinte-linux-marte.adb \
-    s-osinte.ads<s-osinte-linux-marte.ads \
-    s-taprop.adb<s-taprop-linux-marte.adb
-
-    EXTRA_GNATRTL_TASKING_OBJS=a-exetim.o a-extiti.o
-
-    EH_MECHANISM=
-    THREADSLIB = -lmarte
-  else
-    LIBGNAT_TARGET_PAIRS += \
-    g-soccon.ads<g-soccon-linux-x86.ads \
-    s-linux.ads<s-linux.ads \
-    s-osinte.adb<s-osinte-posix.adb \
-    s-osinte.ads<s-osinte-linux.ads \
-    s-tasinf.ads<s-tasinf-linux.ads \
-    s-tasinf.adb<s-tasinf-linux.adb \
-    s-taprop.adb<s-taprop-linux.adb
-
-    EH_MECHANISM=-gcc
-    THREADSLIB = -lpthread
-    EXTRA_GNATRTL_TASKING_OBJS=s-linux.o
-  endif
-
-  TOOLS_TARGET_PAIRS =  \
-    mlib-tgt-specific.adb<mlib-tgt-specific-linux.adb \
-    indepsw.adb<indepsw-gnu.adb
-
-  GNATLIB_SHARED = gnatlib-shared-dual
-  GMEM_LIB = gmemlib
-  PREFIX_OBJS = $(PREFIX_REAL_OBJS)
-  LIBRARY_VERSION := $(LIB_VERSION)
-endif
-
-ifeq ($(strip $(filter-out %86 kfreebsd%,$(arch) $(osys))),)
-  LIBGNAT_TARGET_PAIRS = \
-  a-intnam.ads<a-intnam-freebsd.ads \
-  a-numaux.adb<a-numaux-x86.adb \
-  a-numaux.ads<a-numaux-x86.ads \
-  s-inmaop.adb<s-inmaop-posix.adb \
-  s-intman.adb<s-intman-posix.adb \
-  g-soccon.ads<g-soccon-freebsd.ads \
-  s-osinte.adb<s-osinte-posix.adb \
-  s-osinte.ads<s-osinte-kfreebsd-gnu.ads \
-  s-osprim.adb<s-osprim-posix.adb \
-  s-taprop.adb<s-taprop-linux.adb \
-  s-tasinf.ads<s-tasinf-linux.ads \
-  s-tasinf.adb<s-tasinf-linux.adb \
-  s-taspri.ads<s-taspri-posix.ads \
-  s-tpopsp.adb<s-tpopsp-posix-foreign.adb \
-  system.ads<system-freebsd-x86.ads
-
-  TOOLS_TARGET_PAIRS =  \
-    mlib-tgt-specific.adb<mlib-tgt-specific-linux.adb \
-    indepsw.adb<indepsw-gnu.adb
-
-  EH_MECHANISM=-gcc
-  THREADSLIB = -lpthread
-  GNATLIB_SHARED = gnatlib-shared-dual
-  GMEM_LIB = gmemlib
-  PREFIX_OBJS = $(PREFIX_REAL_OBJS)
-  LIBRARY_VERSION := $(LIB_VERSION)
-endif
-
-ifeq ($(strip $(filter-out %86 freebsd%,$(arch) $(osys))),)
-  LIBGNAT_TARGET_PAIRS = \
-  a-intnam.ads<a-intnam-freebsd.ads \
-  a-numaux.adb<a-numaux-x86.adb \
-  a-numaux.ads<a-numaux-x86.ads \
-  g-bytswa.adb<g-bytswa-x86.adb \
-  g-soccon.ads<g-soccon-freebsd.ads \
-  s-inmaop.adb<s-inmaop-posix.adb \
-  s-intman.adb<s-intman-posix.adb \
-  s-osinte.adb<s-osinte-freebsd.adb \
-  s-osinte.ads<s-osinte-freebsd.ads \
-  s-osprim.adb<s-osprim-posix.adb \
-  s-taprop.adb<s-taprop-posix.adb \
-  s-taspri.ads<s-taspri-posix.ads \
-  s-tpopsp.adb<s-tpopsp-posix.adb \
-  system.ads<system-freebsd-x86.ads
-
-  TOOLS_TARGET_PAIRS = \
-  mlib-tgt-specific.adb<mlib-tgt-specific-linux.adb
-  GNATLIB_SHARED = gnatlib-shared-dual
-
-  EH_MECHANISM=-gcc
-  THREADSLIB= -lpthread
-  GMEM_LIB = gmemlib
-  PREFIX_OBJS = $(PREFIX_REAL_OBJS)
-  LIBRARY_VERSION := $(LIB_VERSION)
-endif
-
-ifeq ($(strip $(filter-out s390% linux%,$(arch) $(osys))),)
-  ifeq ($(strip $(filter-out s390x,$(arch))),)
-    LIBGNAT_TARGET_PAIRS = \
-    a-intnam.ads<a-intnam-linux.ads \
-    s-inmaop.adb<s-inmaop-posix.adb \
-    s-intman.adb<s-intman-posix.adb \
-    s-linux.ads<s-linux.ads \
-    s-osinte.adb<s-osinte-posix.adb \
-    s-osinte.ads<s-osinte-linux.ads \
-    s-osprim.adb<s-osprim-posix.adb \
-    s-taprop.adb<s-taprop-linux.adb \
-    s-tasinf.ads<s-tasinf-linux.ads \
-    s-tasinf.adb<s-tasinf-linux.adb \
-    s-taspri.ads<s-taspri-posix-noaltstack.ads \
-    s-tpopsp.adb<s-tpopsp-posix-foreign.adb \
-    system.ads<system-linux-s390x.ads
-  else
-    LIBGNAT_TARGET_PAIRS = \
-    a-intnam.ads<a-intnam-linux.ads \
-    s-inmaop.adb<s-inmaop-posix.adb \
-    s-intman.adb<s-intman-posix.adb \
-    s-linux.ads<s-linux.ads \
-    s-osinte.adb<s-osinte-posix.adb \
-    s-osinte.ads<s-osinte-linux.ads \
-    s-osprim.adb<s-osprim-posix.adb \
-    s-taprop.adb<s-taprop-linux.adb \
-    s-tasinf.ads<s-tasinf-linux.ads \
-    s-tasinf.adb<s-tasinf-linux.adb \
-    s-taspri.ads<s-taspri-posix-noaltstack.ads \
-    s-tpopsp.adb<s-tpopsp-posix-foreign.adb \
-    system.ads<system-linux-s390.ads
-  endif
-
-  TOOLS_TARGET_PAIRS =  \
-    mlib-tgt-specific.adb<mlib-tgt-specific-linux.adb
-
-  EXTRA_GNATRTL_TASKING_OBJS=s-linux.o
-  EH_MECHANISM=-gcc
-  THREADSLIB = -lpthread
-  GNATLIB_SHARED = gnatlib-shared-dual
-  PREFIX_OBJS = $(PREFIX_REAL_OBJS)
-  LIBRARY_VERSION := $(LIB_VERSION)
-endif
-
-ifeq ($(strip $(filter-out mips sgi irix%,$(targ))),)
-  ifeq ($(strip $(filter-out mips sgi irix6%,$(targ))),)
-    LIBGNAT_TARGET_PAIRS = \
-    a-intnam.ads<a-intnam-irix.ads \
-    s-inmaop.adb<s-inmaop-posix.adb \
-    s-intman.adb<s-intman-irix.adb \
-    s-mastop.adb<s-mastop-irix.adb \
-    s-osinte.adb<s-osinte-irix.adb \
-    s-osinte.ads<s-osinte-irix.ads \
-    s-osprim.adb<s-osprim-posix.adb \
-    s-proinf.adb<s-proinf-irix-athread.adb \
-    s-proinf.ads<s-proinf-irix-athread.ads \
-    s-taprop.adb<s-taprop-irix.adb \
-    s-tasinf.ads<s-tasinf-irix.ads \
-    s-taspri.ads<s-taspri-posix.ads \
-    s-tpopsp.adb<s-tpopsp-posix.adb \
-    s-traceb.adb<s-traceb-mastop.adb \
-    g-soccon.ads<g-soccon-irix.ads \
-    system.ads<system-irix-n32.ads
-
-    THREADSLIB = -lpthread
-    GNATLIB_SHARED = gnatlib-shared-default
-
-  else
-    LIBGNAT_TARGET_PAIRS += \
-    s-mastop.adb<s-mastop-irix.adb \
-    s-osprim.adb<s-osprim-posix.adb \
-    s-traceb.adb<s-traceb-mastop.adb \
-    g-soccon.ads<g-soccon-irix.ads \
-    system.ads<system-irix-o32.ads
-  endif
-
-  EH_MECHANISM=-gcc
-  TOOLS_TARGET_PAIRS = mlib-tgt-specific.adb<mlib-tgt-specific-irix.adb
-  TGT_LIB = -lexc
-  MISCLIB = -lexc
-  PREFIX_OBJS = $(PREFIX_REAL_OBJS)
-  LIBRARY_VERSION := $(LIB_VERSION)
-  GMEM_LIB = gmemlib
-endif
-
-ifeq ($(strip $(filter-out hppa% hp hpux10%,$(targ))),)
-  LIBGNAT_TARGET_PAIRS = \
-  a-excpol.adb<a-excpol-abort.adb \
-  a-intnam.ads<a-intnam-hpux.ads \
-  s-inmaop.adb<s-inmaop-posix.adb \
-  s-interr.adb<s-interr-sigaction.adb \
-  s-intman.adb<s-intman-posix.adb \
-  s-osinte.adb<s-osinte-hpux-dce.adb \
-  s-osinte.ads<s-osinte-hpux-dce.ads \
-  s-parame.ads<s-parame-hpux.ads \
-  s-osprim.adb<s-osprim-posix.adb \
-  s-taprop.adb<s-taprop-hpux-dce.adb \
-  s-taspri.ads<s-taspri-hpux-dce.ads \
-  s-tpopsp.adb<s-tpopsp-posix.adb \
-  g-soccon.ads<g-soccon-hpux.ads \
-  system.ads<system-hpux.ads
-
-  EH_MECHANISM=-gcc
-  PREFIX_OBJS = $(PREFIX_REAL_OBJS)
-endif
-
-ifeq ($(strip $(filter-out hppa% hp hpux11%,$(targ))),)
-  LIBGNAT_TARGET_PAIRS = \
-  a-intnam.ads<a-intnam-hpux.ads \
-  s-inmaop.adb<s-inmaop-posix.adb \
-  s-intman.adb<s-intman-posix.adb \
-  s-osinte.adb<s-osinte-posix.adb \
-  s-osinte.ads<s-osinte-hpux.ads \
-  s-parame.ads<s-parame-hpux.ads \
-  s-osprim.adb<s-osprim-posix.adb \
-  s-traceb.adb<s-traceb-hpux.adb \
-  s-taprop.adb<s-taprop-posix.adb \
-  s-taspri.ads<s-taspri-posix.ads \
-  s-tpopsp.adb<s-tpopsp-posix-foreign.adb \
-  g-soccon.ads<g-soccon-hpux.ads \
-  system.ads<system-hpux.ads
-
-  TOOLS_TARGET_PAIRS = mlib-tgt-specific.adb<mlib-tgt-specific-hpux.adb
-  EH_MECHANISM=-gcc
-  TGT_LIB = /usr/lib/libcl.a
-  THREADSLIB = -lpthread
-  GMEM_LIB = gmemlib
-  soext = .sl
-  SO_OPTS = -Wl,+h,
-  PREFIX_OBJS = $(PREFIX_REAL_OBJS)
-  GNATLIB_SHARED = gnatlib-shared-dual
-  LIBRARY_VERSION := $(LIB_VERSION)
-endif
-
-ifeq ($(strip $(filter-out ibm aix%,$(manu) $(osys))),)
-  LIBGNAT_TARGET_PAIRS = \
-  a-intnam.ads<a-intnam-aix.ads \
-  s-inmaop.adb<s-inmaop-posix.adb \
-  s-intman.adb<s-intman-posix.adb \
-  s-osinte.adb<s-osinte-aix.adb \
-  s-osinte.ads<s-osinte-aix.ads \
-  s-osprim.adb<s-osprim-posix.adb \
-  s-taprop.adb<s-taprop-posix.adb \
-  s-taspri.ads<s-taspri-posix.ads \
-  s-tpopsp.adb<s-tpopsp-posix.adb \
-  g-soccon.ads<g-soccon-aix.ads \
-  system.ads<system-aix.ads
-
-  THREADSLIB = -lpthreads
-  PREFIX_OBJS=$(PREFIX_REAL_OBJS)
-
-  TOOLS_TARGET_PAIRS = \
-  mlib-tgt-specific.adb<mlib-tgt-specific-aix.adb \
-  indepsw.adb<indepsw-aix.adb
-
-  GMEM_LIB = gmemlib
-endif
-
-ifeq ($(strip $(filter-out lynxos,$(osys))),)
-  TOOLS_TARGET_PAIRS = \
-  mlib-tgt-specific.adb<mlib-tgt-specific-lynxos.adb \
-  indepsw.adb<indepsw-gnu.adb
-
-  ifeq ($(strip $(filter-out %86 lynxos,$(arch) $(osys))),)
-    LIBGNAT_TARGET_PAIRS = \
-    a-numaux.adb<a-numaux-x86.adb \
-    a-numaux.ads<a-numaux-x86.ads \
-    a-intnam.ads<a-intnam-lynxos.ads \
-    g-bytswa.adb<g-bytswa-x86.adb \
-    g-soccon.ads<g-soccon-lynxos.ads \
-    g-sttsne.adb<g-sttsne-locking.adb \
-    g-sttsne.ads<g-sttsne-locking.ads \
-    s-inmaop.adb<s-inmaop-posix.adb \
-    s-intman.adb<s-intman-posix.adb \
-    s-osinte.adb<s-osinte-lynxos.adb \
-    s-osinte.ads<s-osinte-lynxos.ads \
-    s-osprim.adb<s-osprim-posix.adb \
-    s-taprop.adb<s-taprop-lynxos.adb \
-    s-taspri.ads<s-taspri-lynxos.ads \
-    s-tpopsp.adb<s-tpopsp-lynxos.adb \
-    system.ads<system-lynxos-x86.ads
-
-    PREFIX_OBJS=$(PREFIX_REAL_OBJS)
-
-  else
-    LIBGNAT_TARGET_PAIRS = \
-    a-intnam.ads<a-intnam-lynxos.ads \
-    g-soccon.ads<g-soccon-lynxos.ads \
-    g-sttsne.adb<g-sttsne-locking.adb \
-    g-sttsne.ads<g-sttsne-locking.ads \
-    s-inmaop.adb<s-inmaop-posix.adb \
-    s-intman.adb<s-intman-posix.adb \
-    s-osinte.adb<s-osinte-lynxos.adb \
-    s-osinte.ads<s-osinte-lynxos.ads \
-    s-osprim.adb<s-osprim-posix.adb \
-    s-taprop.adb<s-taprop-lynxos.adb \
-    s-taspri.ads<s-taspri-lynxos.ads \
-    s-tpopsp.adb<s-tpopsp-lynxos.adb \
-    system.ads<system-lynxos-ppc.ads
-  endif
-endif
-
-ifeq ($(strip $(filter-out rtems%,$(osys))),)
-  LIBGNAT_TARGET_PAIRS = \
-  system.ads<system-rtems.ads \
-  a-intnam.ads<a-intnam-rtems.ads \
-  s-inmaop.adb<s-inmaop-posix.adb \
-  s-intman.adb<s-intman-posix.adb \
-  s-osinte.adb<s-osinte-rtems.adb \
-  s-osinte.ads<s-osinte-rtems.ads \
-  s-osprim.adb<s-osprim-posix.adb \
-  s-parame.adb<s-parame-rtems.adb \
-  s-taprop.adb<s-taprop-posix.adb \
-  s-taspri.ads<s-taspri-posix.ads \
-  s-tpopsp.adb<s-tpopsp-rtems.adb \
-  g-soccon.ads<g-soccon-rtems.ads \
-  s-stchop.adb<s-stchop-rtems.adb
-endif
-
-ifeq ($(strip $(filter-out alpha% dec osf%,$(targ))),)
-  LIBGNAT_TARGET_PAIRS = \
-  a-intnam.ads<a-intnam-tru64.ads \
-  s-inmaop.adb<s-inmaop-posix.adb \
-  s-intman.adb<s-intman-posix.adb \
-  s-mastop.adb<s-mastop-tru64.adb \
-  s-osinte.adb<s-osinte-tru64.adb \
-  s-osinte.ads<s-osinte-tru64.ads \
-  s-osprim.adb<s-osprim-unix.adb \
-  s-taprop.adb<s-taprop-tru64.adb \
-  s-tasinf.ads<s-tasinf-tru64.ads \
-  s-taspri.ads<s-taspri-tru64.ads \
-  s-tpopsp.adb<s-tpopsp-posix-foreign.adb \
-  s-traceb.adb<s-traceb-mastop.adb \
-  g-soccon.ads<g-soccon-tru64.ads \
-  system.ads<system-tru64.ads
-
-  TOOLS_TARGET_PAIRS=mlib-tgt-specific.adb<mlib-tgt-specific-tru64.adb
-
-  EH_MECHANISM=-gcc
-  GMEM_LIB=gmemlib
-  THREADSLIB = -lpthread -lmach -lexc -lrt
-  PREFIX_OBJS = $(PREFIX_REAL_OBJS)
-  GNATLIB_SHARED = gnatlib-shared-default
-  LIBRARY_VERSION := $(LIB_VERSION)
-endif
-
-ifeq ($(strip $(filter-out alpha64 ia64 dec hp vms% openvms% alphavms%,$(host))),)
-
-soext  = .exe
-hyphen = _
-LN = cp -p
-LN_S = cp -p
-
-.SUFFIXES: .sym
-
-.o.sym:
-	@ gnu:[bin]vmssymvec $<
-endif
-
-ifeq ($(strip $(filter-out alpha64 ia64 dec hp vms% openvms% alphavms%,$(targ))),)
-ifeq ($(strip $(filter-out ia64 hp vms% openvms%,$(targ))),)
-  LIBGNAT_TARGET_PAIRS_AUX1 = \
-  g-enblsp.adb<g-enblsp-vms-ia64.adb \
-  g-trasym.adb<g-trasym-vms-ia64.adb \
-  s-asthan.adb<s-asthan-vms-ia64.adb \
-  s-osinte.adb<s-osinte-vms-ia64.adb \
-  s-osinte.ads<s-osinte-vms-ia64.ads \
-  s-vaflop.adb<s-vaflop-vms-ia64.adb \
-  system.ads<system-vms-ia64.ads
-
-  LIBGNAT_TARGET_PAIRS_AUX2 = \
-  s-parame.ads<s-parame-vms-ia64.ads
-else
-ifeq ($(strip $(filter-out alpha64 dec vms% openvms% alphavms%,$(targ))),)
-  LIBGNAT_TARGET_PAIRS_AUX1 = \
-  g-enblsp.adb<g-enblsp-vms-alpha.adb \
-  g-trasym.adb<g-trasym-vms-alpha.adb \
-  s-traent.adb<s-traent-vms.adb \
-  s-traent.ads<s-traent-vms.ads \
-  s-asthan.adb<s-asthan-vms-alpha.adb \
-  s-osinte.adb<s-osinte-vms.adb \
-  s-osinte.ads<s-osinte-vms.ads \
-  s-vaflop.adb<s-vaflop-vms-alpha.adb \
-  system.ads<system-vms_64.ads
-
-ifeq ($(strip $(filter-out express EXPRESS,$(THREAD_KIND))),)
-  LIBGNAT_TARGET_PAIRS_AUX2 = \
-  s-parame.ads<s-parame-vms-restrict.ads
-else
-  LIBGNAT_TARGET_PAIRS_AUX2 = \
-  s-parame.ads<s-parame-vms-alpha.ads
-endif
-endif
-endif
-
-  LIBGNAT_TARGET_PAIRS = \
-  a-caldel.adb<a-caldel-vms.adb \
-  a-calend.adb<a-calend-vms.adb \
-  a-calend.ads<a-calend-vms.ads \
-  a-dirval.adb<a-dirval-vms.adb \
-  a-excpol.adb<a-excpol-abort.adb \
-  a-intnam.ads<a-intnam-vms.ads \
-  a-numaux.ads<a-numaux-vms.ads \
-  g-expect.adb<g-expect-vms.adb \
-  g-soccon.ads<g-soccon-vms.ads \
-  g-socthi.ads<g-socthi-vms.ads \
-  g-socthi.adb<g-socthi-vms.adb \
-  g-stsifd.adb<g-stsifd-sockets.adb \
-  g-sttsne.adb<g-sttsne-locking.adb \
-  g-sttsne.ads<g-sttsne-locking.ads \
-  i-c.ads<i-c-vms_64.ads \
-  i-cstrin.ads<i-cstrin-vms_64.ads \
-  i-cstrin.adb<i-cstrin-vms_64.adb \
-  i-cpoint.ads<i-cpoint-vms_64.ads \
-  i-cpoint.adb<i-cpoint-vms_64.adb \
-  i-cstrea.adb<i-cstrea-vms.adb \
-  memtrack.adb<memtrack-vms_64.adb \
-  s-auxdec.ads<s-auxdec-vms_64.ads \
-  s-crtl.ads<s-crtl-vms_64.ads \
-  s-inmaop.adb<s-inmaop-vms.adb \
-  s-interr.adb<s-interr-vms.adb \
-  s-intman.adb<s-intman-vms.adb \
-  s-intman.ads<s-intman-vms.ads \
-  s-memory.adb<s-memory-vms_64.adb \
-  s-memory.ads<s-memory-vms_64.ads \
-  s-osprim.adb<s-osprim-vms.adb \
-  s-osprim.ads<s-osprim-vms.ads \
-  s-taprop.adb<s-taprop-vms.adb \
-  s-taspri.ads<s-taspri-vms.ads \
-  s-tpopsp.adb<s-tpopsp-posix-foreign.adb \
-  s-tpopde.adb<s-tpopde-vms.adb \
-  s-tpopde.ads<s-tpopde-vms.ads \
-  $(LIBGNAT_TARGET_PAIRS_AUX1) \
-  $(LIBGNAT_TARGET_PAIRS_AUX2)
-
-ifeq ($(strip $(filter-out ia64 hp vms% openvms%,$(targ))),)
-  TOOLS_TARGET_PAIRS= \
-  mlib-tgt-specific.adb<mlib-tgt-specific-vms-ia64.adb \
-  symbols.adb<symbols-vms.adb \
-  symbols-processing.adb<symbols-processing-vms-ia64.adb
-else
-  TOOLS_TARGET_PAIRS= \
-  mlib-tgt-specific.adb<mlib-tgt-specific-vms-alpha.adb \
-  symbols.adb<symbols-vms.adb \
-  symbols-processing.adb<symbols-processing-vms-alpha.adb
-endif
-
-adamsg.o: adamsg.msg
-	-$(DECC) --cc=message adamsg.msg -o adamsg.o
-
-  EXTRA_GNATMAKE_OBJS = mlib-tgt-vms_common.o
-
-  GMEM_LIB = gmemlib
-  EH_MECHANISM=-gcc
-  GNATLIB_SHARED=gnatlib-shared-vms
-ifeq ($(strip $(filter-out alpha64 dec vms% openvms% alphavms%,$(targ))),)
-  EXTRA_LIBGNAT_SRCS=vmshandler.asm
-  EXTRA_LIBGNAT_OBJS=vmshandler.o
-endif
-  EXTRA_LIBGNAT_SRCS+=adamsg.msg
-  EXTRA_LIBGNAT_OBJS+=adamsg.o
-  EXTRA_GNATRTL_TASKING_OBJS=s-tpopde.o
-  EXTRA_GNATTOOLS = \
-     ../../gnatlbr$(exeext)  \
-     ../../gnatsym$(exeext)  \
-     ../../vms_help$(exeext) \
-     ../../gnat.hlp
-  # This command transforms (YYYYMMDD) into YY,MMDD
-  GSMATCH_VERSION := $(shell grep "^ *Gnat_Static_Version_String" $(fsrcpfx)gnatvsn.ads | sed -e 's/.*(\(.*\)).*/\1/' -e 's/\(..\)\(..\)\(....\).*/\2,\3/')
-  TOOLS_LIBS_LO := --for-linker=sys\\$$\$$library:trace.exe
-  LIBRARY_VERSION := $(subst .,_,$(LIB_VERSION))
-endif
-
-ifeq ($(strip $(filter-out cygwin32% mingw32% pe,$(osys))),)
-  LIBGNAT_TARGET_PAIRS = \
-  a-dirval.adb<a-dirval-mingw.adb \
-  a-excpol.adb<a-excpol-abort.adb \
-  a-numaux.adb<a-numaux-x86.adb \
-  a-numaux.ads<a-numaux-x86.ads \
-  s-gloloc.adb<s-gloloc-mingw.adb \
-  s-inmaop.adb<s-inmaop-dummy.adb \
-  s-memory.adb<s-memory-mingw.adb \
-  s-taspri.ads<s-taspri-mingw.ads \
-  s-tasinf.adb<s-tasinf-mingw.adb \
-  s-tasinf.ads<s-tasinf-mingw.ads \
-  g-bytswa.adb<g-bytswa-x86.adb \
-  g-socthi.ads<g-socthi-mingw.ads \
-  g-socthi.adb<g-socthi-mingw.adb \
-  g-stsifd.adb<g-stsifd-sockets.adb \
-  g-soccon.ads<g-soccon-mingw.ads \
-  g-soliop.ads<g-soliop-mingw.ads
-
-  ifeq ($(strip $(filter-out rtx_w32 rtx_rtss,$(THREAD_KIND))),)
-    LIBGNAT_TARGET_PAIRS += \
-    s-intman.adb<s-intman-dummy.adb \
-    s-osinte.ads<s-osinte-rtx.ads \
-    s-osprim.adb<s-osprim-rtx.adb \
-    s-taprop.adb<s-taprop-rtx.adb \
-    system.ads<system-rtx.ads
-
-    EXTRA_GNATRTL_NONTASKING_OBJS = s-win32.o
-
-    MISCLIB = -lwsock32 -lrtapi_w32
-    THREADSLIB=-lrtapi_w32
-  else
-    LIBGNAT_TARGET_PAIRS += \
-    a-exetim.adb<a-exetim-mingw.adb \
-    a-exetim.ads<a-exetim-mingw.ads \
-    a-intnam.ads<a-intnam-mingw.ads \
-    g-sercom.adb<g-sercom-mingw.adb \
-    s-interr.adb<s-interr-sigaction.adb \
-    s-intman.adb<s-intman-mingw.adb \
-    s-osinte.ads<s-osinte-mingw.ads \
-    s-osprim.adb<s-osprim-mingw.adb \
-    s-taprop.adb<s-taprop-mingw.adb \
-    system.ads<system-mingw.ads
-
-    EXTRA_GNATRTL_NONTASKING_OBJS = s-win32.o g-regist.o
-    EXTRA_GNATRTL_TASKING_OBJS = a-exetim.o
-
-    MISCLIB = -lwsock32
-
-    # ??? This will be replaced by gnatlib-shared-dual-win32 when GNAT
-    # auto-import support for array/record will be done.
-    GNATLIB_SHARED = gnatlib-shared-win32
-  endif
-
-  TOOLS_TARGET_PAIRS= \
-  mlib-tgt-specific.adb<mlib-tgt-specific-mingw.adb \
-  indepsw.adb<indepsw-mingw.adb
-
-  EH_MECHANISM=-gcc
-  GMEM_LIB = gmemlib
-  PREFIX_OBJS = $(PREFIX_REAL_OBJS)
-  EXTRA_GNATTOOLS = ../../gnatdll$(exeext)
-  EXTRA_GNATMAKE_OBJS = mdll.o mdll-utl.o mdll-fil.o
-  soext = .dll
-  LIBRARY_VERSION := $(LIB_VERSION)
-endif
-
-ifeq ($(strip $(filter-out mips linux%,$(arch) $(osys))),)
-  LIBGNAT_TARGET_PAIRS = \
-  a-intnam.ads<a-intnam-linux.ads \
-  g-soccon.ads<g-soccon-linux-mips.ads \
-  s-inmaop.adb<s-inmaop-posix.adb \
-  s-intman.adb<s-intman-posix.adb \
-  s-linux.ads<s-linux.ads \
-  s-osinte.adb<s-osinte-posix.adb \
-  s-osinte.ads<s-osinte-linux.ads \
-  s-osprim.adb<s-osprim-posix.adb \
-  s-taprop.adb<s-taprop-linux.adb \
-  s-tasinf.ads<s-tasinf-linux.ads \
-  s-tasinf.adb<s-tasinf-linux.adb \
-  s-taspri.ads<s-taspri-posix.ads \
-  s-tpopsp.adb<s-tpopsp-posix-foreign.adb \
-  system.ads<system-linux-mips.ads
-
-  EH_MECHANISM=-gcc
-  THREADSLIB = -lpthread
-  GNATLIB_SHARED = gnatlib-shared-dual
-  GMEM_LIB = gmemlib
-  PREFIX_OBJS = $(PREFIX_REAL_OBJS)
-  LIBRARY_VERSION := $(LIB_VERSION)
-endif
-
-ifeq ($(strip $(filter-out mipsel linux%,$(arch) $(osys))),)
-  LIBGNAT_TARGET_PAIRS = \
-  a-intnam.ads<a-intnam-linux.ads \
-  g-soccon.ads<g-soccon-linux-mips.ads \
-  s-inmaop.adb<s-inmaop-posix.adb \
-  s-intman.adb<s-intman-posix.adb \
-  s-linux.ads<s-linux.ads \
-  s-osinte.adb<s-osinte-posix.adb \
-  s-osinte.ads<s-osinte-linux.ads \
-  s-osprim.adb<s-osprim-posix.adb \
-  s-taprop.adb<s-taprop-linux.adb \
-  s-tasinf.ads<s-tasinf-linux.ads \
-  s-tasinf.adb<s-tasinf-linux.adb \
-  s-taspri.ads<s-taspri-posix.ads \
-  s-tpopsp.adb<s-tpopsp-posix-foreign.adb \
-  system.ads<system-linux-mipsel.ads
-
-  EH_MECHANISM=-gcc
-  THREADSLIB = -lpthread
-  GNATLIB_SHARED = gnatlib-shared-dual
-  GMEM_LIB = gmemlib
-  PREFIX_OBJS = $(PREFIX_REAL_OBJS)
-  LIBRARY_VERSION := $(LIB_VERSION)
-endif
-
-ifeq ($(strip $(filter-out powerpc% linux%,$(arch) $(osys))),)
-  LIBGNAT_TARGET_PAIRS = \
-  a-intnam.ads<a-intnam-linux.ads \
-  g-soccon.ads<g-soccon-linux-ppc.ads \
-  s-inmaop.adb<s-inmaop-posix.adb \
-  s-intman.adb<s-intman-posix.adb \
-  s-linux.ads<s-linux.ads \
-  s-osinte.adb<s-osinte-posix.adb \
-  s-osinte.ads<s-osinte-linux.ads \
-  s-osprim.adb<s-osprim-posix.adb \
-  s-taprop.adb<s-taprop-linux.adb \
-  s-tasinf.ads<s-tasinf-linux.ads \
-  s-tasinf.adb<s-tasinf-linux.adb \
-  s-taspri.ads<s-taspri-posix-noaltstack.ads \
-  s-tpopsp.adb<s-tpopsp-posix-foreign.adb \
-  g-sercom.adb<g-sercom-linux.adb \
-  system.ads<system-linux-ppc.ads
-
-  TOOLS_TARGET_PAIRS =  \
-    mlib-tgt-specific.adb<mlib-tgt-specific-linux.adb \
-    indepsw.adb<indepsw-gnu.adb
-
-  EXTRA_GNATRTL_TASKING_OBJS=s-linux.o
-  EH_MECHANISM=-gcc
-  THREADSLIB = -lpthread
-  GNATLIB_SHARED = gnatlib-shared-dual
-  GMEM_LIB = gmemlib
-  PREFIX_OBJS = $(PREFIX_REAL_OBJS)
-  LIBRARY_VERSION := $(LIB_VERSION)
-endif
-
-ifeq ($(strip $(filter-out sparc% linux%,$(arch) $(osys))),)
-  LIBGNAT_TARGET_PAIRS = \
-  a-intnam.ads<a-intnam-linux.ads \
-  s-inmaop.adb<s-inmaop-posix.adb \
-  s-intman.adb<s-intman-posix.adb \
-  s-linux.ads<s-linux.ads \
-  s-osinte.adb<s-osinte-posix.adb \
-  s-osinte.ads<s-osinte-linux.ads \
-  s-osprim.adb<s-osprim-posix.adb \
-  s-taprop.adb<s-taprop-linux.adb \
-  s-tasinf.ads<s-tasinf-linux.ads \
-  s-tasinf.adb<s-tasinf-linux.adb \
-  s-taspri.ads<s-taspri-posix-noaltstack.ads \
-  s-tpopsp.adb<s-tpopsp-posix-foreign.adb \
-  system.ads<system-linux-sparc.ads
-
-  TOOLS_TARGET_PAIRS =  \
-    mlib-tgt-specific.adb<mlib-tgt-specific-linux.adb \
-    indepsw.adb<indepsw-gnu.adb
-
-  EXTRA_GNATRTL_TASKING_OBJS=s-linux.o
-  EH_MECHANISM=-gcc
-  THREADSLIB = -lpthread
-  GNATLIB_SHARED = gnatlib-shared-dual
-  GMEM_LIB = gmemlib
-  PREFIX_OBJS = $(PREFIX_REAL_OBJS)
-  LIBRARY_VERSION := $(LIB_VERSION)
-endif
-
-ifeq ($(strip $(filter-out hppa% linux%,$(arch) $(osys))),)
-  LIBGNAT_TARGET_PAIRS = \
-  a-intnam.ads<a-intnam-linux.ads \
-  s-inmaop.adb<s-inmaop-posix.adb \
-  s-intman.adb<s-intman-posix.adb \
-  s-linux.ads<s-linux-hppa.ads \
-  s-osinte.adb<s-osinte-posix.adb \
-  s-osinte.ads<s-osinte-linux.ads \
-  s-osprim.adb<s-osprim-posix.adb \
-  s-taprop.adb<s-taprop-linux.adb \
-  s-tasinf.ads<s-tasinf-linux.ads \
-  s-tasinf.adb<s-tasinf-linux.adb \
-  s-taspri.ads<s-taspri-posix-noaltstack.ads \
-  s-tpopsp.adb<s-tpopsp-posix-foreign.adb \
-  system.ads<system-linux-hppa.ads
-
-  TOOLS_TARGET_PAIRS =  \
-    mlib-tgt-specific.adb<mlib-tgt-specific-linux.adb \
-    indepsw.adb<indepsw-gnu.adb
-
-  EXTRA_GNATRTL_TASKING_OBJS=s-linux.o
-  EH_MECHANISM=-gcc
-  THREADSLIB = -lpthread
-  GNATLIB_SHARED = gnatlib-shared-dual
-  GMEM_LIB = gmemlib
-  PREFIX_OBJS = $(PREFIX_REAL_OBJS)
-  LIBRARY_VERSION := $(LIB_VERSION)
-endif
-
-ifeq ($(strip $(filter-out sh4% linux%,$(arch) $(osys))),)
-  LIBGNAT_TARGET_PAIRS = \
-  a-intnam.ads<a-intnam-linux.ads \
-  s-inmaop.adb<s-inmaop-posix.adb \
-  s-intman.adb<s-intman-posix.adb \
-  s-linux.ads<s-linux.ads \
-  s-osinte.adb<s-osinte-posix.adb \
-  s-osinte.ads<s-osinte-linux.ads \
-  s-osprim.adb<s-osprim-posix.adb \
-  s-taprop.adb<s-taprop-linux.adb \
-  s-tasinf.ads<s-tasinf-linux.ads \
-  s-tasinf.adb<s-tasinf-linux.adb \
-  s-taspri.ads<s-taspri-posix-noaltstack.ads \
-  s-tpopsp.adb<s-tpopsp-posix-foreign.adb \
-  system.ads<system-linux-sh4.ads
-
-  TOOLS_TARGET_PAIRS =  \
-    mlib-tgt-specific.adb<mlib-tgt-specific-linux.adb \
-    indepsw.adb<indepsw-linux.adb
-
-  EXTRA_GNATRTL_TASKING_OBJS=s-linux.o
-  EH_MECHANISM=-gcc
-  MISCLIB=
-  THREADSLIB = -lpthread
-  GNATLIB_SHARED = gnatlib-shared-dual
-  GMEM_LIB = gmemlib
-  PREFIX_OBJS = $(PREFIX_REAL_OBJS)
-  LIBRARY_VERSION := $(LIB_VERSION)
-endif
-
-ifeq ($(strip $(filter-out %ia64 linux%,$(arch) $(osys))),)
-  LIBGNAT_TARGET_PAIRS = \
-  a-intnam.ads<a-intnam-linux.ads \
-  a-numaux.ads<a-numaux-libc-x86.ads \
-  g-soccon.ads<g-soccon-linux-64.ads \
-  s-inmaop.adb<s-inmaop-posix.adb \
-  s-intman.adb<s-intman-posix.adb \
-  s-linux.ads<s-linux.ads \
-  s-osinte.ads<s-osinte-linux.ads \
-  s-osinte.adb<s-osinte-posix.adb \
-  s-osprim.adb<s-osprim-posix.adb \
-  s-taprop.adb<s-taprop-linux.adb \
-  s-tasinf.ads<s-tasinf-linux.ads \
-  s-tasinf.adb<s-tasinf-linux.adb \
-  s-tpopsp.adb<s-tpopsp-posix-foreign.adb \
-  s-taspri.ads<s-taspri-posix-noaltstack.ads \
-  g-sercom.adb<g-sercom-linux.adb \
-  system.ads<system-linux-ia64.ads
-
-  TOOLS_TARGET_PAIRS =  \
-    mlib-tgt-specific.adb<mlib-tgt-specific-linux.adb \
-    indepsw.adb<indepsw-gnu.adb
-
-  EXTRA_GNATRTL_TASKING_OBJS=s-linux.o
-  EH_MECHANISM=-gcc
-  MISCLIB=
-  THREADSLIB=-lpthread
-  GNATLIB_SHARED=gnatlib-shared-dual
-  GMEM_LIB = gmemlib
-  PREFIX_OBJS=$(PREFIX_REAL_OBJS)
-  LIBRARY_VERSION := $(LIB_VERSION)
-endif
-
-ifeq ($(strip $(filter-out alpha% linux%,$(arch) $(osys))),)
-  LIBGNAT_TARGET_PAIRS = \
-  a-intnam.ads<a-intnam-linux.ads \
-  s-inmaop.adb<s-inmaop-posix.adb \
-  s-intman.adb<s-intman-posix.adb \
-  s-linux.ads<s-linux-alpha.ads \
-  s-osinte.ads<s-osinte-linux.ads \
-  s-osinte.adb<s-osinte-posix.adb \
-  s-osprim.adb<s-osprim-posix.adb \
-  s-taprop.adb<s-taprop-linux.adb \
-  s-tasinf.ads<s-tasinf-linux.ads \
-  s-tasinf.adb<s-tasinf-linux.adb \
-  s-tpopsp.adb<s-tpopsp-posix-foreign.adb \
-  s-taspri.ads<s-taspri-posix-noaltstack.ads \
-  system.ads<system-linux-alpha.ads
-
-  TOOLS_TARGET_PAIRS =  \
-    mlib-tgt-specific.adb<mlib-tgt-specific-linux.adb \
-    indepsw.adb<indepsw-gnu.adb
-
-  EXTRA_GNATRTL_TASKING_OBJS=s-linux.o
-  EH_MECHANISM=-gcc
-  MISCLIB=
-  THREADSLIB=-lpthread
-  GNATLIB_SHARED=gnatlib-shared-dual
-  PREFIX_OBJS=$(PREFIX_REAL_OBJS)
-  LIBRARY_VERSION := $(LIB_VERSION)
-endif
-
-ifeq ($(strip $(filter-out %x86_64 linux%,$(arch) $(osys))),)
-  LIBGNAT_TARGET_PAIRS = \
-  a-intnam.ads<a-intnam-linux.ads \
-  a-numaux.adb<a-numaux-x86.adb \
-  a-numaux.ads<a-numaux-x86.ads \
-  g-soccon.ads<g-soccon-linux-64.ads \
-  s-inmaop.adb<s-inmaop-posix.adb \
-  s-intman.adb<s-intman-posix.adb \
-  s-linux.ads<s-linux.ads \
-  s-osinte.ads<s-osinte-linux.ads \
-  s-osinte.adb<s-osinte-posix.adb \
-  s-osprim.adb<s-osprim-posix.adb \
-  s-taprop.adb<s-taprop-linux.adb \
-  s-tasinf.ads<s-tasinf-linux.ads \
-  s-tasinf.adb<s-tasinf-linux.adb \
-  s-tpopsp.adb<s-tpopsp-posix-foreign.adb \
-  s-taspri.ads<s-taspri-posix.ads \
-  g-sercom.adb<g-sercom-linux.adb \
-  system.ads<system-linux-x86_64.ads
-
-  TOOLS_TARGET_PAIRS =  \
-    mlib-tgt-specific.adb<mlib-tgt-specific-linux.adb \
-    indepsw.adb<indepsw-gnu.adb
-
-  EXTRA_GNATRTL_TASKING_OBJS=s-linux.o
-  EH_MECHANISM=-gcc
-  THREADSLIB=-lpthread
-  GNATLIB_SHARED=gnatlib-shared-dual
-  GMEM_LIB = gmemlib
-  PREFIX_OBJS=$(PREFIX_REAL_OBJS)
-  LIBRARY_VERSION := $(LIB_VERSION)
-endif
-
-ifeq ($(strip $(filter-out darwin%,$(osys))),)
-  ifeq ($(strip $(filter-out %86,$(arch))),)
-    LIBGNAT_TARGET_PAIRS = \
-    a-intnam.ads<a-intnam-darwin.ads \
-    s-inmaop.adb<s-inmaop-posix.adb \
-    s-intman.adb<s-intman-posix.adb \
-    s-osinte.adb<s-osinte-darwin.adb \
-    s-osinte.ads<s-osinte-darwin.ads \
-    s-osprim.adb<s-osprim-posix.adb \
-    s-taprop.adb<s-taprop-posix.adb \
-    s-taspri.ads<s-taspri-posix.ads \
-    s-tpopsp.adb<s-tpopsp-posix-foreign.adb \
-    g-soccon.ads<g-soccon-darwin.ads \
-    a-numaux.ads<a-numaux-x86.ads \
-    a-numaux.adb<a-numaux-x86.adb \
-    system.ads<system-darwin-x86.ads
-  else
-    LIBGNAT_TARGET_PAIRS = \
-    a-intnam.ads<a-intnam-darwin.ads \
-    s-inmaop.adb<s-inmaop-posix.adb \
-    s-intman.adb<s-intman-posix.adb \
-    s-osinte.adb<s-osinte-darwin.adb \
-    s-osinte.ads<s-osinte-darwin.ads \
-    s-osprim.adb<s-osprim-posix.adb \
-    s-taprop.adb<s-taprop-posix.adb \
-    s-taspri.ads<s-taspri-posix.ads \
-    s-tpopsp.adb<s-tpopsp-posix-foreign.adb \
-    g-soccon.ads<g-soccon-darwin.ads \
-    a-numaux.ads<a-numaux-darwin.ads \
-    a-numaux.adb<a-numaux-darwin.adb \
-    system.ads<system-darwin-ppc.ads
-  endif
-
-  TOOLS_TARGET_PAIRS =  \
-    mlib-tgt-specific.adb<mlib-tgt-specific-darwin.adb
-
-  EH_MECHANISM=-gcc
-  GNATLIB_SHARED = gnatlib-shared-darwin
-  SO_OPTS = -Wl,-flat_namespace -shared-libgcc
-  RANLIB = ranlib -c
-  GMEM_LIB = gmemlib
-  PREFIX_OBJS=$(PREFIX_REAL_OBJS)
-  LIBRARY_VERSION := $(LIB_VERSION)
-  soext = .dylib
-endif
-
-ifneq ($(EH_MECHANISM),)
-  LIBGNAT_TARGET_PAIRS += a-exexpr.adb<a-exexpr$(EH_MECHANISM).adb
-  EXTRA_LIBGNAT_SRCS+=raise$(EH_MECHANISM).c
-  EXTRA_LIBGNAT_OBJS+=raise$(EH_MECHANISM).o
-endif
-
-# Use the Ada 2005 version of Ada.Exceptions by default, unless specified
-# explicitly already. The base files (a-except.ad?) are used only for building
-# the compiler and other basic tools.
-# These base versions lack Ada 2005 additions which would cause bootstrap
-# problems if included in the compiler and other basic tools.
-
-ifeq ($(filter-out a-except%,$(LIBGNAT_TARGET_PAIRS)),$(LIBGNAT_TARGET_PAIRS))
-  LIBGNAT_TARGET_PAIRS += \
-    a-except.ads<a-except-2005.ads \
-    a-except.adb<a-except-2005.adb
-endif
-
-# The runtime library for gnat comprises two directories.  One contains the
-# Ada source files that the compiler (gnat1) needs -- these files are listed
-# by ADA_INCLUDE_SRCS -- and the other contains the object files and their
-# corresponding .ali files for the parts written in Ada, libgnat.a for
-# the parts of the runtime written in C, and libgthreads.a for the pthreads
-# emulation library.  LIBGNAT_OBJS lists the objects that go into libgnat.a,
-# while GNATRTL_OBJS lists the object files compiled from Ada sources that
-# go into the directory.  The pthreads emulation is built in the threads
-# subdirectory and copied.
-LIBGNAT_SRCS = ada.h adaint.c adaint.h argv.c cio.c cstreams.c \
-  errno.c exit.c cal.c ctrl_c.c env.c env.h \
-  raise.h raise.c sysdep.c aux-io.c init.c initialize.c seh_init.c \
-  final.c tracebak.c tb-alvms.c tb-alvxw.c tb-gcc.c expect.c mkdir.c \
-  socket.c gsocket.h targext.c $(EXTRA_LIBGNAT_SRCS)
-
-LIBGNAT_OBJS = adaint.o argv.o cio.o cstreams.o ctrl_c.o errno.o exit.o env.o \
-  raise.o sysdep.o aux-io.o init.o initialize.o seh_init.o cal.o \
-  final.o tracebak.o expect.o mkdir.o socket.o targext.o $(EXTRA_LIBGNAT_OBJS)
-
-# NOTE ??? - when the -I option for compiling Ada code is made to work,
-#  the library installation will change and there will be a
-#  GNAT_RTL_SRCS.  Right now we count on being able to build GNATRTL_OBJS
-#  from ADA_INCLUDE_SRCS.
-
-# GNATRTL_NONTASKING_OBJS and GNATRTL_TASKING_OBJS can be found in
-# the following include file:
-
-include $(fsrcdir)/Makefile.rtl
-
-GNATRTL_LINEARALGEBRA_OBJS = a-nlcoar.o a-nllcar.o a-nllrar.o a-nlrear.o \
-  a-nucoar.o a-nurear.o i-forbla.o i-forlap.o s-gearop.o
-
-GNATRTL_OBJS = $(GNATRTL_NONTASKING_OBJS) $(GNATRTL_TASKING_OBJS) \
-  $(GNATRTL_LINEARALGEBRA_OBJS) g-trasym.o memtrack.o
-
-# Default run time files
-
-ADA_INCLUDE_SRCS =\
- ada.ads calendar.ads directio.ads gnat.ads interfac.ads ioexcept.ads \
- machcode.ads text_io.ads unchconv.ads unchdeal.ads \
- sequenio.ads system.ads memtrack.adb \
- a-[a-o]*.adb a-[p-z]*.adb a-[a-o]*.ads a-[p-z]*.ads g-*.ad? i-*.ad? \
- s-[a-o]*.adb s-[p-z]*.adb s-[a-o]*.ads s-[p-z]*.ads
-
-LIBGNAT=../rts/libgnat.a
-
-GCC_LINK=$(CC) -static-libgcc $(ADA_INCLUDES)
-
-# when compiling the tools, the runtime has to be first on the path so that
-# it hides the runtime files lying with the rest of the sources
-ifeq ($(TOOLSCASE),native)
-  vpath %.ads ../rts ../
-  vpath %.adb ../rts ../
-  vpath %.c   ../rts ../
-  vpath %.h   ../rts ../
-endif
-
-# in the cross tools case, everything is compiled with the native
-# gnatmake/link. Therefore only -I needs to be modified in ADA_INCLUDES
-ifeq ($(TOOLSCASE),cross)
-  vpath %.ads ../
-  vpath %.adb ../
-  vpath %.c   ../
-  vpath %.h   ../
-endif
-
-common-tools:
-	$(GNATMAKE) -c -b $(ADA_INCLUDES) \
-	  --GNATBIND="$(GNATBIND)" --GCC="$(CC) $(ALL_ADAFLAGS)" \
-	  gnatchop gnatcmd gnatkr gnatls gnatprep gnatxref gnatfind gnatname \
-	  gnatclean -bargs $(ADA_INCLUDES) $(GNATBIND_FLAGS)
-	$(GNATLINK) -v gnatcmd -o ../../gnat$(exeext) \
-		--GCC="$(GCC_LINK)" $(TOOLS_LIBS)
-	$(GNATLINK) -v gnatchop -o ../../gnatchop$(exeext) \
-		--GCC="$(GCC_LINK)" $(TOOLS_LIBS)
-	$(GNATLINK) -v gnatkr -o ../../gnatkr$(exeext) \
-		--GCC="$(GCC_LINK)" $(TOOLS_LIBS)
-	$(GNATLINK) -v gnatls -o ../../gnatls$(exeext) \
-		--GCC="$(GCC_LINK)" $(TOOLS_LIBS)
-	$(GNATLINK) -v gnatprep -o ../../gnatprep$(exeext) \
-		--GCC="$(GCC_LINK)" $(TOOLS_LIBS)
-	$(GNATLINK) -v gnatxref -o ../../gnatxref$(exeext) \
-		--GCC="$(GCC_LINK)" $(TOOLS_LIBS)
-	$(GNATLINK) -v gnatfind -o ../../gnatfind$(exeext) \
-		--GCC="$(GCC_LINK)" $(TOOLS_LIBS)
-	$(GNATLINK) -v gnatname -o ../../gnatname$(exeext) \
-		--GCC="$(GCC_LINK)" $(TOOLS_LIBS)
-	$(GNATLINK) -v gnatclean -o ../../gnatclean$(exeext) \
-		--GCC="$(GCC_LINK)" $(TOOLS_LIBS)
-
-../../gnatsym$(exeext): 
-	$(GNATMAKE) -c $(ADA_INCLUDES) gnatsym --GCC="$(CC) $(ALL_ADAFLAGS)"
-	$(GNATBIND) $(ADA_INCLUDES) $(GNATBIND_FLAGS) gnatsym
-	$(GNATLINK) -v gnatsym -o $@ --GCC="$(GCC_LINK)" $(TOOLS_LIBS)
-
-../../gnatdll$(exeext): 
-	$(GNATMAKE) -c $(ADA_INCLUDES) gnatdll --GCC="$(CC) $(ALL_ADAFLAGS)"
-	$(GNATBIND) $(ADA_INCLUDES) $(GNATBIND_FLAGS) gnatdll
-	$(GNATLINK) -v gnatdll -o $@ --GCC="$(GCC_LINK)" $(TOOLS_LIBS)
-
-../../vxaddr2line$(exeext): targext.o
-	$(GNATMAKE) -c  $(ADA_INCLUDES) vxaddr2line --GCC="$(CC) $(ALL_ADAFLAGS)"
-	$(GNATBIND) $(ADA_INCLUDES) $(GNATBIND_FLAGS) vxaddr2line
-	$(GNATLINK) -v vxaddr2line -o $@ --GCC="$(GCC_LINK)" targext.o $(CLIB)
-
-gnatmake-re:  link.o targext.o
-	$(GNATMAKE) $(ADA_INCLUDES) -u sdefault --GCC="$(CC) $(MOST_ADA_FLAGS)"
-	$(GNATMAKE) -c $(ADA_INCLUDES) gnatmake --GCC="$(CC) $(ALL_ADAFLAGS)"
-	$(GNATBIND) $(ADA_INCLUDES) $(GNATBIND_FLAGS) gnatmake
-	$(GNATLINK) -v gnatmake -o ../../gnatmake$(exeext) \
-		--GCC="$(GCC_LINK)" $(TOOLS_LIBS)
-
-# Note the use of the "mv" command in order to allow gnatlink to be linked with
-# with the former version of gnatlink itself which cannot override itself.
-gnatlink-re:  link.o targext.o
-	$(GNATMAKE) -c $(ADA_INCLUDES) gnatlink --GCC="$(CC) $(ALL_ADAFLAGS)"
-	$(GNATBIND) $(ADA_INCLUDES) $(GNATBIND_FLAGS) gnatlink
-	$(GNATLINK) -v gnatlink -o ../../gnatlinknew$(exeext) \
-		    --GCC="$(GCC_LINK)" $(TOOLS_LIBS)
-	$(MV)  ../../gnatlinknew$(exeext)  ../../gnatlink$(exeext)
-
-# Needs to be built with CC=gcc
-# Since the RTL should be built with the latest compiler, remove the
-#  stamp target in the parent directory whenever gnat1 is rebuilt
-
-# Likewise for the tools
-../../gnatmake$(exeext): $(P) b_gnatm.o link.o targext.o $(GNATMAKE_OBJS)
-	$(GCC_LINK) $(ALL_CFLAGS) $(LDFLAGS) -o $@ b_gnatm.o $(GNATMAKE_OBJS) \
-		    $(TOOLS_LIBS)
-
-../../gnatlink$(exeext): $(P) b_gnatl.o link.o targext.o $(GNATLINK_OBJS)
-	$(GCC_LINK) $(ALL_CFLAGS) $(LDFLAGS) -o $@ b_gnatl.o $(GNATLINK_OBJS) \
-		    $(TOOLS_LIBS)
-
-../stamp-gnatlib:
-	@if [ ! -f stamp-gnatlib ] ; \
-	then \
-	  $(ECHO) You must first build the GNAT library: make gnatlib; \
-	  false; \
-	else \
-	  true; \
-	fi
-
-install-gnatlib: ../stamp-gnatlib
-#	Create the directory before deleting it, in case the directory is
-#	a list of directories (as it may be on VMS). This ensures we are
-#	deleting the right one.
-	-$(MKDIR) $(DESTDIR)$(ADA_RTL_OBJ_DIR)
-	-$(MKDIR) $(DESTDIR)$(ADA_INCLUDE_DIR)
-	$(RMDIR) $(DESTDIR)$(ADA_RTL_OBJ_DIR)
-	$(RMDIR) $(DESTDIR)$(ADA_INCLUDE_DIR)
-	-$(MKDIR) $(DESTDIR)$(ADA_RTL_OBJ_DIR)
-	-$(MKDIR) $(DESTDIR)$(ADA_INCLUDE_DIR)
-	for file in rts/*.ali; do \
-	    $(INSTALL_DATA_DATE) $$file $(DESTDIR)$(ADA_RTL_OBJ_DIR); \
-	done
-	-$(INSTALL_DATA) rts/g-trasym$(objext) $(DESTDIR)$(ADA_RTL_OBJ_DIR)
-	-cd rts; for file in *$(arext);do \
-	    $(INSTALL_DATA) $$file $(DESTDIR)$(ADA_RTL_OBJ_DIR); \
-	    $(RANLIB_FOR_TARGET) $(DESTDIR)$(ADA_RTL_OBJ_DIR)/$$file; \
-	done
-	-$(foreach file, $(EXTRA_ADALIB_FILES), \
-	    $(INSTALL_DATA_DATE) rts/$(file) $(DESTDIR)$(ADA_RTL_OBJ_DIR) && \
-	) true
-#     Install the shared libraries, if any, using $(INSTALL) instead
-#     of $(INSTALL_DATA). The latter may force a mode inappropriate
-#     for shared libraries on some targets, e.g. on HP-UX where the x
-#     permission is required.
-	for file in gnat gnarl; do \
-	   if [ -f rts/lib$${file}$(hyphen)$(LIBRARY_VERSION)$(soext) ]; then \
-	      $(INSTALL) rts/lib$${file}$(hyphen)$(LIBRARY_VERSION)$(soext) \
-			 $(DESTDIR)$(ADA_RTL_OBJ_DIR); \
-	   fi; \
-	   if [ -f rts/lib$${file}$(soext) ]; then \
-	      $(LN_S) lib$${file}$(hyphen)$(LIBRARY_VERSION)$(soext) \
-	      $(DESTDIR)$(ADA_RTL_OBJ_DIR)/lib$${file}$(soext); \
-	   fi; \
-	done
-# This copy must be done preserving the date on the original file.
-	for file in rts/*.ad?; do \
-	    $(INSTALL_DATA_DATE) $$file $(DESTDIR)$(ADA_INCLUDE_DIR); \
-	done
-	cd $(DESTDIR)$(ADA_INCLUDE_DIR); $(CHMOD) a-wx *.adb
-	cd $(DESTDIR)$(ADA_INCLUDE_DIR); $(CHMOD) a-wx *.ads
-
-../stamp-gnatlib2:
-	$(RM) rts/s-*.ali
-	$(RM) rts/s-*$(objext)
-	$(RM) rts/a-*.ali
-	$(RM) rts/a-*$(objext)
-	$(RM) rts/*.ali
-	$(RM) rts/*$(objext)
-	$(RM) rts/*$(arext)
-	$(RM) rts/*$(soext)
-	touch ../stamp-gnatlib2
-	$(RM) ../stamp-gnatlib
-
-# NOTE: The $(foreach ...) commands assume ";" is the valid separator between
-#       successive target commands. Although the Gnu make documentation
-#       implies this is true on all systems, I suspect it may not be, So care
-#       has been taken to allow a sed script to look for ";)" and substitue
-#       for ";" the appropriate character in the range of lines below
-#       beginning with "GNULLI Begin" and ending with "GNULLI End"
-
-# GNULLI Begin ###########################################################
-
-../stamp-gnatlib1: Makefile ../stamp-gnatlib2
-	$(RMDIR) rts
-	$(MKDIR) rts
-	$(CHMOD) u+w rts
-# Copy target independent sources
-	$(foreach f,$(ADA_INCLUDE_SRCS) $(LIBGNAT_SRCS), \
-	  $(LN_S) $(fsrcpfx)$(f) rts ;) true
-# Remove files to be replaced by target dependent sources
-	$(RM) $(foreach PAIR,$(LIBGNAT_TARGET_PAIRS), \
-	                rts/$(word 1,$(subst <, ,$(PAIR))))
-	$(RM) rts/*-*-*.ads rts/*-*-*.adb
-# Copy new target dependent sources
-	$(foreach PAIR,$(LIBGNAT_TARGET_PAIRS), \
-	          $(LN_S) $(fsrcpfx)$(word 2,$(subst <, ,$(PAIR))) \
-	                rts/$(word 1,$(subst <, ,$(PAIR)));)
-	$(RM) ../stamp-gnatlib
-	touch ../stamp-gnatlib1
-
-# GNULLI End #############################################################
-
-# Don't use semicolon separated shell commands that involve list expansions.
-# The semicolon triggers a call to DCL on VMS and DCL can't handle command
-# line lengths in excess of 256 characters.
-# Example: cd rts; ar rc libfoo.a $(LONG_LIST_OF_OBJS)
-# is guaranteed to overflow the buffer.
-
-gnatlib: ../stamp-gnatlib1 ../stamp-gnatlib2
-	$(MAKE) -C rts \
-		CC="`echo \"$(GCC_FOR_TARGET)\" \
-		| sed -e 's,^\./xgcc,../../xgcc,' -e 's,-B\./,-B../../,'`" \
-	        INCLUDES="$(INCLUDES_FOR_SUBDIR) -I./../.." \
-                CFLAGS="$(GNATLIBCFLAGS_FOR_C)" \
-	        FORCE_DEBUG_ADAFLAGS="$(FORCE_DEBUG_ADAFLAGS)" \
-		srcdir=$(fsrcdir) \
-	        -f ../Makefile $(LIBGNAT_OBJS)
-	$(MAKE) -C rts \
-		CC="`echo \"$(GCC_FOR_TARGET)\" \
-		| sed -e 's,^\./xgcc,../../xgcc,' -e 's,-B\./,-B../../,'`" \
-	        ADA_INCLUDES="" \
-                CFLAGS="$(GNATLIBCFLAGS)" \
-	        ADAFLAGS="$(GNATLIBFLAGS)" \
-	        FORCE_DEBUG_ADAFLAGS="$(FORCE_DEBUG_ADAFLAGS)" \
-		srcdir=$(fsrcdir) \
-	        -f ../Makefile \
-	        $(GNATRTL_OBJS)
-	$(RM) rts/libgnat$(arext) rts/libgnarl$(arext)
-	$(AR_FOR_TARGET) $(AR_FLAGS) rts/libgnat$(arext) \
-	   $(addprefix rts/,$(GNATRTL_NONTASKING_OBJS) $(LIBGNAT_OBJS))
-        ifneq ($(PREFIX_OBJS),)
-		$(AR_FOR_TARGET) $(AR_FLAGS) rts/libgccprefix$(arext) \
-		  $(PREFIX_OBJS);
-		$(RANLIB_FOR_TARGET) rts/libgccprefix$(arext)
-        endif
-	$(RANLIB_FOR_TARGET) rts/libgnat$(arext)
-	$(AR_FOR_TARGET) $(AR_FLAGS) rts/libgnarl$(arext) \
-	   $(addprefix rts/,$(GNATRTL_TASKING_OBJS))
-	$(RANLIB_FOR_TARGET) rts/libgnarl$(arext)
-	$(AR_FOR_TARGET) $(AR_FLAGS) rts/libgnala$(arext) \
-	   $(addprefix rts/,$(GNATRTL_LINEARALGEBRA_OBJS))
-	$(RANLIB_FOR_TARGET) rts/libgnala$(arext)
-        ifeq ($(GMEM_LIB),gmemlib)
-		$(AR_FOR_TARGET) $(AR_FLAGS) rts/libgmem$(arext) \
-		  rts/memtrack.o
-		$(RANLIB_FOR_TARGET) rts/libgmem$(arext)
-        endif
-	$(CHMOD) a-wx rts/*.ali
-	touch ../stamp-gnatlib
-
-# Warning: this target assumes that LIBRARY_VERSION has been set correctly.
-gnatlib-shared-default:
-	$(MAKE) $(FLAGS_TO_PASS) \
-             GNATLIBFLAGS="$(GNATLIBFLAGS)" \
-	     GNATLIBCFLAGS="$(GNATLIBCFLAGS) $(TARGET_LIBGCC2_CFLAGS)" \
-	     THREAD_KIND="$(THREAD_KIND)" \
-             gnatlib
-	$(RM) rts/libgna*$(soext)
-	cd rts; ../../xgcc -B../../ -shared $(GNATLIBCFLAGS) \
-		$(TARGET_LIBGCC2_CFLAGS) \
-		-o libgnat$(hyphen)$(LIBRARY_VERSION)$(soext) \
-		$(GNATRTL_NONTASKING_OBJS) $(LIBGNAT_OBJS) \
-		$(SO_OPTS)libgnat$(hyphen)$(LIBRARY_VERSION)$(soext) \
-		$(MISCLIB) -lm
-	cd rts; ../../xgcc -B../../ -shared $(GNATLIBCFLAGS) \
-		$(TARGET_LIBGCC2_CFLAGS) \
-		-o libgnarl$(hyphen)$(LIBRARY_VERSION)$(soext) \
-		$(GNATRTL_TASKING_OBJS) \
-		$(SO_OPTS)libgnarl$(hyphen)$(LIBRARY_VERSION)$(soext) \
-		$(THREADSLIB)
-	cd rts; $(LN_S) libgnat$(hyphen)$(LIBRARY_VERSION)$(soext) \
-		libgnat$(soext)
-	cd rts; $(LN_S) libgnarl$(hyphen)$(LIBRARY_VERSION)$(soext) \
-		libgnarl$(soext)
-
-gnatlib-shared-dual:
-	$(MAKE) $(FLAGS_TO_PASS) \
-             GNATLIBFLAGS="$(GNATLIBFLAGS)" \
-	     GNATLIBCFLAGS="$(GNATLIBCFLAGS)" \
-	     THREAD_KIND="$(THREAD_KIND)" \
-             gnatlib-shared-default
-	$(MV) rts/libgna*$(soext) .
-	$(RM) ../stamp-gnatlib2
-	$(MAKE) $(FLAGS_TO_PASS) \
-             GNATLIBFLAGS="$(GNATLIBFLAGS)" \
-	     GNATLIBCFLAGS="$(GNATLIBCFLAGS)" \
-	     THREAD_KIND="$(THREAD_KIND)" \
-             gnatlib
-	$(MV) libgna*$(soext) rts
-
-gnatlib-shared-dual-win32:
-	$(MAKE) $(FLAGS_TO_PASS) \
-             GNATLIBFLAGS="$(GNATLIBFLAGS)" \
-	     GNATLIBCFLAGS="$(GNATLIBCFLAGS) $(TARGET_LIBGCC2_CFLAGS)" \
-	     THREAD_KIND="$(THREAD_KIND)" \
-             gnatlib-shared-win32
-	$(MV) rts/libgna*$(soext) .
-	$(RM) ../stamp-gnatlib2
-	$(MAKE) $(FLAGS_TO_PASS) \
-             GNATLIBFLAGS="$(GNATLIBFLAGS)" \
-	     GNATLIBCFLAGS="$(GNATLIBCFLAGS)" \
-	     THREAD_KIND="$(THREAD_KIND)" \
-             gnatlib
-	$(MV) libgna*$(soext) rts
-
-# ??? we need to add the option to support auto-import of arrays/records to
-# the GNATLIBFLAGS when this will be supported by GNAT. At this point we will
-# use the gnatlib-shared-dual-win32 target to build the GNAT runtimes on
-# Windows.
-gnatlib-shared-win32:
-	$(MAKE) $(FLAGS_TO_PASS) \
-             GNATLIBFLAGS="$(GNATLIBFLAGS)" \
-	     GNATLIBCFLAGS="$(GNATLIBCFLAGS) $(TARGET_LIBGCC2_CFLAGS)" \
-	     THREAD_KIND="$(THREAD_KIND)" \
-             gnatlib
-	$(RM) rts/libgna*$(soext)
-	cd rts; ../../xgcc -B../../ -shared $(TARGET_LIBGCC2_CFLAGS) \
-		-o libgnat$(hyphen)$(LIBRARY_VERSION)$(soext) \
-		$(GNATRTL_NONTASKING_OBJS) $(LIBGNAT_OBJS) \
-		$(SO_OPTS)libgnat$(hyphen)$(LIBRARY_VERSION)$(soext) $(MISCLIB)
-	cd rts; ../../xgcc -B../../ -shared $(TARGET_LIBGCC2_CFLAGS) \
-		-o libgnarl$(hyphen)$(LIBRARY_VERSION)$(soext) \
-		$(GNATRTL_TASKING_OBJS) \
-		$(SO_OPTS)libgnarl$(hyphen)$(LIBRARY_VERSION)$(soext) \
-		$(THREADSLIB) -Wl,libgnat$(hyphen)$(LIBRARY_VERSION)$(soext)
-
-gnatlib-shared-darwin:
-	$(MAKE) $(FLAGS_TO_PASS) \
-	     GNATLIBFLAGS="$(GNATLIBFLAGS)" \
-	     GNATLIBCFLAGS="$(GNATLIBCFLAGS) $(TARGET_LIBGCC2_CFLAGS) \
-	                    -fno-common" \
-	     THREAD_KIND="$(THREAD_KIND)" \
-	     gnatlib
-	$(RM) rts/libgnat$(soext) rts/libgnarl$(soext)
-	cd rts; ../../xgcc -B../../ -dynamiclib $(TARGET_LIBGCC2_CFLAGS) \
-		-o libgnat$(hyphen)$(LIBRARY_VERSION)$(soext) \
-		$(GNATRTL_NONTASKING_OBJS) $(LIBGNAT_OBJS) \
-		$(SO_OPTS) \
-		$(MISCLIB) -lm
-	cd rts; ../../xgcc -B../../ -dynamiclib $(TARGET_LIBGCC2_CFLAGS) \
-		-o libgnarl$(hyphen)$(LIBRARY_VERSION)$(soext) \
-		$(GNATRTL_TASKING_OBJS) \
-		$(SO_OPTS) \
-		$(THREADSLIB) -Wl,libgnat$(hyphen)$(LIBRARY_VERSION)$(soext)
-	cd rts; $(LN_S) libgnat$(hyphen)$(LIBRARY_VERSION)$(soext) \
-		libgnat$(soext)
-	cd rts; $(LN_S) libgnarl$(hyphen)$(LIBRARY_VERSION)$(soext) \
-		libgnarl$(soext)
-
-gnatlib-shared-vms:
-	$(MAKE) $(FLAGS_TO_PASS) \
-             GNATLIBFLAGS="$(GNATLIBFLAGS)" \
-	     GNATLIBCFLAGS="$(GNATLIBCFLAGS)" \
-	     THREAD_KIND="$(THREAD_KIND)" \
-             gnatlib
-	$(RM) rts/libgna*$(soext)
-	cd rts && \
-	../../gnatsym -s SYMVEC_$$$$.opt \
-	$(LIBGNAT_OBJS) $(GNATRTL_NONTASKING_OBJS) && \
-	../../xgcc -g -B../../ -shared -shared-libgcc \
-	   -o libgnat$(hyphen)$(LIBRARY_VERSION)$(soext) libgnat.a \
-	   sys\$$library:trace.exe \
-	   --for-linker=/noinform \
-	   --for-linker=SYMVEC_$$$$.opt \
-	   --for-linker=gsmatch=equal,$(GSMATCH_VERSION)
-	cd rts && \
-	../../gnatsym -s SYMVEC_$$$$.opt \
-	$(GNATRTL_TASKING_OBJS) && \
-	../../xgcc -g -B../../ -shared -shared-libgcc \
-	   -o libgnarl$(hyphen)$(LIBRARY_VERSION)$(soext) \
-	   libgnarl.a libgnat$(hyphen)$(LIBRARY_VERSION)$(soext) \
-	   sys\$$library:trace.exe \
-	   --for-linker=/noinform \
-	   --for-linker=SYMVEC_$$$$.opt \
-	   --for-linker=gsmatch=equal,$(GSMATCH_VERSION)
-
-gnatlib-shared:
-	$(MAKE) $(FLAGS_TO_PASS) \
-             GNATLIBFLAGS="$(GNATLIBFLAGS)" \
-	     GNATLIBCFLAGS="$(GNATLIBCFLAGS)" \
-	     THREAD_KIND="$(THREAD_KIND)" \
-	     TARGET_LIBGCC2_CFLAGS="$(TARGET_LIBGCC2_CFLAGS)" \
-             $(GNATLIB_SHARED)
-
-gnatlib-sjlj:
-	$(MAKE) $(FLAGS_TO_PASS) EH_MECHANISM="" ../stamp-gnatlib1
-	sed -e 's/ZCX_By_Default.*/ZCX_By_Default            : constant Boolean := False;/' rts/system.ads > rts/s.ads
-	$(MV) rts/s.ads rts/system.ads
-	$(MAKE) $(FLAGS_TO_PASS) \
-	     EH_MECHANISM="" \
-	     GNATLIBFLAGS="$(GNATLIBFLAGS)" \
-	     GNATLIBCFLAGS="$(GNATLIBCFLAGS)" \
-	     THREAD_KIND="$(THREAD_KIND)" \
-	     TARGET_LIBGCC2_CFLAGS="$(TARGET_LIBGCC2_CFLAGS)" gnatlib
-
-gnatlib-zcx:
-	$(MAKE) $(FLAGS_TO_PASS) EH_MECHANISM="-gcc" ../stamp-gnatlib1
-	sed -e 's/ZCX_By_Default.*/ZCX_By_Default            : constant Boolean := True;/' rts/system.ads > rts/s.ads
-	$(MV) rts/s.ads rts/system.ads
-	$(MAKE) $(FLAGS_TO_PASS) \
-	     EH_MECHANISM="-gcc" \
-	     GNATLIBFLAGS="$(GNATLIBFLAGS)" \
-	     GNATLIBCFLAGS="$(GNATLIBCFLAGS)" \
-	     THREAD_KIND="$(THREAD_KIND)" \
-	     TARGET_LIBGCC2_CFLAGS="$(TARGET_LIBGCC2_CFLAGS)" gnatlib
-
-# .s files for cross-building
-gnat-cross: force
-	make $(GNAT1_ADA_OBJS) CC="gcc -B../stage1/" CFLAGS="-S -gnatp"
-
-# Compiling object files from source files.
-
-# Note that dependencies on obstack.h are not written
-# because that file is not part of GCC.
-# Dependencies on gvarargs.h are not written
-# because all that file does, when not compiling with GCC,
-# is include the system varargs.h.
-
-b_gnatl.c : $(GNATLINK_OBJS)
-	$(GNATBIND) -C $(ADA_INCLUDES) -o b_gnatl.c gnatlink.ali
-b_gnatl.o : b_gnatl.c
-
-b_gnatm.c : $(GNATMAKE_OBJS)
-	$(GNATBIND) -C $(ADA_INCLUDES) -o b_gnatm.c gnatmake.ali
-b_gnatm.o : b_gnatm.c
-
-ADA_INCLUDE_DIR = $(libsubdir)/adainclude
-ADA_RTL_OBJ_DIR = $(libsubdir)/adalib
-
-# force no sibling call optimization on s-traceb.o so the number of stack
-# frames to be skipped when computing a call chain is not modified by
-# optimization. However we can do that only when building the runtime
-# (not the compiler) because the -fno-optimize-sibling-calls option exists
-# only in GCC 3 and above.
-
-ifneq (,$(findstring xgcc,$(CC)))
-NO_SIBLING_ADAFLAGS=-fno-optimize-sibling-calls
-else
-NO_SIBLING_ADAFLAGS=
-endif
-
-s-traceb.o  : s-traceb.adb
-	$(CC) -c $(ALL_ADAFLAGS) $(FORCE_DEBUG_ADAFLAGS) \
-	      $(NO_SIBLING_ADAFLAGS) $(ADA_INCLUDES) \
-      $< $(OUTPUT_OPTION)
-
-# force debugging information on s-tasdeb.o so that it is always
-# possible to set conditional breakpoints on tasks.
-
-s-tasdeb.o  : s-tasdeb.adb s-tasdeb.ads
-	$(CC) -c $(ALL_ADAFLAGS) $(FORCE_DEBUG_ADAFLAGS) -O0 $(ADA_INCLUDES) \
-	      $< $(OUTPUT_OPTION)
-
-# force no function reordering on a-except.o because of the exclusion bounds
-# mechanism (see the source file for more detailed information). However we
-# can do that only when building the runtime (not the compiler) because the
-# -fno-toplevel-reorder option exists only in GCC 4.2 and above.
-
-ifneq (,$(findstring xgcc,$(CC)))
-NO_REORDER_ADAFLAGS=-fno-toplevel-reorder
-else
-NO_REORDER_ADAFLAGS=
-endif
-
-# force debugging information on a-except.o so that it is always
-# possible to set conditional breakpoints on exceptions.
-# use -O1 otherwise gdb isn't able to get a full backtrace on mips targets.
-
-a-except.o  : a-except.adb a-except.ads
-	$(CC) -c $(ALL_ADAFLAGS) $(FORCE_DEBUG_ADAFLAGS) -O1 -fno-inline \
-	      $(NO_REORDER_ADAFLAGS) $(ADA_INCLUDES) $< $(OUTPUT_OPTION)
-
-# compile s-except.o without optimization and with debug info to let the
-# debugger set breakpoints and inspect subprogram parameters on exception
-# related events.
-
-s-except.o  : s-except.adb s-except.ads
-	$(CC) -c $(ALL_ADAFLAGS) $(FORCE_DEBUG_ADAFLAGS) -O0 $(ADA_INCLUDES) \
-	      $< $(OUTPUT_OPTION)
-
-# force debugging information on s-assert.o so that it is always
-# possible to set breakpoint on assert failures.
-
-s-assert.o  : s-assert.adb s-assert.ads a-except.ads
-	$(CC) -c $(ALL_ADAFLAGS) $(FORCE_DEBUG_ADAFLAGS) -O2 $(ADA_INCLUDES) \
-	      $< $(OUTPUT_OPTION)
-
-adadecode.o : adadecode.c adadecode.h
-aux-io.o  : aux-io.c
-argv.o    : argv.c
-cal.o     : cal.c
-deftarg.o : deftarg.c
-errno.o   : errno.c
-exit.o    : adaint.h exit.c
-expect.o  : expect.c
-final.o   : final.c
-gmem.o    : gmem.c
-link.o    : link.c
-mkdir.o   : mkdir.c
-socket.o  : socket.c gsocket.h
-sysdep.o  : sysdep.c
-raise-gcc.o : raise-gcc.c raise.h
-raise.o   : raise.c raise.h
-vx_stack_info.o : vx_stack_info.c
-
-gen-soccon: gen-soccon.c gsocket.h
-	$(CC) $(ALL_CFLAGS) $(ADA_CFLAGS) $(ALL_CPPFLAGS) $(INCLUDES) \
-		-UIN_GCC -DTARGET=\"$(target_alias)\" \
-		$< $(OUTPUT_OPTION)
-
-cio.o     : cio.c
-	$(CC) -c $(ALL_CFLAGS) $(ADA_CFLAGS) \
-	         $(ALL_CPPFLAGS) $(INCLUDES) $< $(OUTPUT_OPTION)
-
-init.o    : init.c adaint.h raise.h
-	$(CC) -c $(ALL_CFLAGS) $(ADA_CFLAGS) \
-	         $(ALL_CPPFLAGS) $(INCLUDES) $< $(OUTPUT_OPTION)
-
-initialize.o : initialize.c raise.h
-	$(CC) -c $(ALL_CFLAGS) $(ADA_CFLAGS) \
-	         $(ALL_CPPFLAGS) $(INCLUDES) $< $(OUTPUT_OPTION)
-
-targext.o : targext.c
-	$(CC) -c $(ALL_CFLAGS) $(ADA_CFLAGS) \
-		$(ALL_CPPFLAGS) $(INCLUDES_FOR_SUBDIR) \
-		$< $(OUTPUT_OPTION)
-
-# No optimization to compile this file as optimizations (-O1 or above) breaks
-# the SEH handling on Windows. The reasons are not clear.
-seh_init.o : seh_init.c raise.h
-	$(CC) -c $(ALL_CFLAGS) $(ADA_CFLAGS) -O0 \
-	         $(ALL_CPPFLAGS) $(INCLUDES) $< $(OUTPUT_OPTION)
-
-# Need to keep the frame pointer in this file to pop the stack properly on
-# some targets.
-tracebak.o  : tracebak.c tb-alvms.c tb-alvxw.c tb-gcc.c
-	$(CC) -c $(ALL_CFLAGS) $(ADA_CFLAGS) $(ALL_CPPFLAGS) $(INCLUDES) \
-	      -fno-omit-frame-pointer $< $(OUTPUT_OPTION)
-
-# In GNU Make, ignore whether `stage*' exists.
-.PHONY: stage1 stage2 stage3 stage4 clean realclean TAGS bootstrap
-.PHONY: risky-stage1 risky-stage2 risky-stage3 risky-stage4
-
-force:
-
-# Gnatlbr, Vms_help, and Gnat.hlp are only used on VMS
-
-../../gnatlbr$(exeext): ../../prefix.o
-	$(GNATMAKE) -c $(ADA_INCLUDES) gnatlbr --GCC="$(CC) $(ALL_ADAFLAGS)"
-	$(GNATBIND) $(ADA_INCLUDES) $(GNATBIND_FLAGS) gnatlbr
-	$(GNATLINK) -v gnatlbr -o $@ --GCC="$(GCC_LINK)" $(TOOLS_LIBS)
-
-../../vms_help$(exeext):
-	$(GNATMAKE) -c $(ADA_INCLUDES) vms_help --GCC="$(CC) $(ALL_ADAFLAGS)"
-	$(GNATBIND) $(ADA_INCLUDES) $(GNATBIND_FLAGS) vms_help
-	$(GNATLINK) -v vms_help -o $@ --GCC="$(GCC_LINK)" $(TOOLS_LIBS)
-
-../../gnat.hlp: ../../vms_help$(exeext)
-	../../vms_help$(exeext) $(fsrcdir)/gnat.help_in \
-	                        $(fsrcdir)/vms_data.ads ../../gnat.hlp
+-include ./gcc-interface/Makefile
+-include ../gcc-interface/Makefile
diff --git a/gcc/ada/config-lang.in b/gcc/ada/config-lang.in
index e5922d5c905..ad76864cd61 100644
--- a/gcc/ada/config-lang.in
+++ b/gcc/ada/config-lang.in
@@ -1,11 +1,11 @@
 # Top level configure fragment for GNU Ada (GNAT).
-#   Copyright (C) 1994-2003, 2007 Free Software Foundation, Inc.
+#   Copyright (C) 1994-2008 Free Software Foundation, Inc.
 
 #This file is part of GCC.
 
 #GCC is free software; you can redistribute it and/or modify
 #it under the terms of the GNU General Public License as published by
-#the Free Software Foundation; either version 3, or (at your option)
+#the Free Software Foundation; either version 2, or (at your option)
 #any later version.
 
 #GCC is distributed in the hope that it will be useful,
@@ -14,28 +14,15 @@
 #GNU General Public License for more details.
 
 #You should have received a copy of the GNU General Public License
-#along with GCC; see the file COPYING3.  If not see
-#<http://www.gnu.org/licenses/>.
-
-# Configure looks for the existence of this file to auto-config each language.
-# We define several parameters used by configure:
-#
-# language	- name of language as it would appear in $(LANGUAGES)
-# boot_language - "yes" if we need to build this language in stage1
-# compilers	- value to add to $(COMPILERS)
+#along with GCC; see the file COPYING.  If not, write to
+#the Free Software Foundation, 51 Franklin Street, Fifth Floor,
+#Boston, MA 02110-1301, USA.
 
 language="ada"
-boot_language=yes
-boot_language_boot_flags='ADAFLAGS="$(BOOT_ADAFLAGS)"'
-
-compilers="gnat1\$(exeext)"
-
-gtfiles="\$(srcdir)/ada/ada-tree.h \$(srcdir)/ada/gigi.h \$(srcdir)/ada/decl.c \$(srcdir)/ada/trans.c \$(srcdir)/ada/utils.c"
-
-outputs=ada/Makefile
-
-target_libs="target-libada"
-lang_dirs="gnattools"
+gcc_subdir="ada/gcc-interface"
 
-# Ada will not work until the front end starts emitting GIMPLE trees.
-build_by_default=no
+if [ -f ${srcdir}/gcc/ada/gcc-interface/config-lang.in ]; then
+   . ${srcdir}/gcc/ada/gcc-interface/config-lang.in
+else
+   . ${srcdir}/ada/gcc-interface/config-lang.in
+fi
diff --git a/gcc/ada/gcc-interface/Make-lang.in b/gcc/ada/gcc-interface/Make-lang.in
new file mode 100644
index 00000000000..2d21d45c23f
--- /dev/null
+++ b/gcc/ada/gcc-interface/Make-lang.in
@@ -0,0 +1,4309 @@
+# Top level -*- makefile -*- fragment for GNU Ada (GNAT).
+#   Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
+#   2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
+
+#This file is part of GCC.
+
+#GCC is free software; you can redistribute it and/or modify
+#it under the terms of the GNU General Public License as published by
+#the Free Software Foundation; either version 3, or (at your option)
+#any later version.
+
+#GCC is distributed in the hope that it will be useful,
+#but WITHOUT ANY WARRANTY; without even the implied warranty of
+#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#GNU General Public License for more details.
+
+#You should have received a copy of the GNU General Public License
+#along with GCC; see the file COPYING3.  If not see
+#<http://www.gnu.org/licenses/>.
+
+# This file provides the language dependent support in the main Makefile.
+# Each language makefile fragment must provide the following targets:
+#
+# foo.all.cross, foo.start.encap, foo.rest.encap,
+# foo.install-common, foo.install-man, foo.install-info, foo.install-pdf,
+# foo.info, foo.dvi, foo.pdf, foo.html, foo.uninstall,
+# foo.mostlyclean, foo.clean, foo.distclean,
+# foo.maintainer-clean, foo.stage1, foo.stage2, foo.stage3, foo.stage4
+#
+# where `foo' is the name of the language.
+#
+# It should also provide rules for:
+#
+# - making any compiler driver (eg: g++)
+# - the compiler proper (eg: cc1plus)
+# - define the names for selecting the language in LANGUAGES.
+# tool definitions
+CP = cp -p
+ECHO = echo
+MV = mv
+MKDIR = mkdir -p
+RM = rm -f
+RMDIR = rm -rf
+
+
+# Extra flags to pass to recursive makes.
+COMMON_ADAFLAGS= -gnatpg -gnata
+BOOT_ADAFLAGS= $(COMMON_ADAFLAGS)
+
+ifeq ($(CROSS),)
+# If not in cross context we are probably doing a bootstrap
+# so disable warnings during stage1
+ADAFLAGS= $(COMMON_ADAFLAGS) -gnatwns
+else
+ADAFLAGS= $(COMMON_ADAFLAGS)
+endif
+
+ALL_ADAFLAGS = $(CFLAGS) $(ALL_ADA_CFLAGS) $(X_ADAFLAGS) $(T_ADAFLAGS) \
+	$(ADAFLAGS)
+FORCE_DEBUG_ADAFLAGS = -g
+ADA_CFLAGS =
+ALL_ADA_CFLAGS = $(X_ADA_CFLAGS) $(T_ADA_CFLAGS) $(ADA_CFLAGS)
+ADA_INCLUDES = -nostdinc -I- -I. -Iada -I$(srcdir)/ada -I$(srcdir)/ada/gcc-interface
+ADA_INCLUDE_DIR = $(libsubdir)/adainclude
+ADA_RTL_OBJ_DIR = $(libsubdir)/adalib
+ADA_FLAGS_TO_PASS = \
+	"ADA_FOR_BUILD=$(ADA_FOR_BUILD)"	\
+	"ADA_INCLUDE_DIR=$(ADA_INCLUDE_DIR)"	\
+	"ADA_RTL_OBJ_DIR=$(ADA_RTL_OBJ_DIR)"	\
+	"ADAFLAGS=$(ADAFLAGS)"			\
+	"ADA_FOR_TARGET=$(ADA_FOR_TARGET)"	\
+	"INSTALL=$(INSTALL)" 			\
+	"INSTALL_DATA=$(INSTALL_DATA)"		\
+	"INSTALL_PROGRAM=$(INSTALL_PROGRAM)"
+
+# Say how to compile Ada programs.
+.SUFFIXES: .ada .adb .ads
+
+# FIXME: need to add $(ALL_ADA_CFLAGS) to .c.o suffix rule
+# Use loose warnings for this front end, but add some special flags
+ada-warn = $(ALL_ADA_CFLAGS) $(WERROR)
+# unresolved warnings in a couple of files
+ada/tracebak.o-warn = -Wno-error
+ada/b_gnat1.o-warn = -Wno-error
+ada/b_gnatb.o-warn = -Wno-error
+
+.adb.o:
+	$(CC) -c $(ALL_ADAFLAGS) $(ADA_INCLUDES) $< $(OUTPUT_OPTION)
+.ads.o:
+	$(CC) -c $(ALL_ADAFLAGS) $(ADA_INCLUDES) $< $(OUTPUT_OPTION)
+
+# Define the names for selecting Ada in LANGUAGES.
+ada: gnat1$(exeext) gnatbind$(exeext)
+
+# Tell GNU Make to ignore these, if they exist.
+.PHONY: ada
+
+# There are too many Ada sources to check against here.  Let's
+# always force the recursive make.
+ADA_TOOLS_FLAGS_TO_PASS=\
+        "CC=../../xgcc -B../../"	\
+        "CFLAGS=$(CFLAGS)"		\
+	"exeext=$(exeext)"              \
+        "ADAFLAGS=$(ADAFLAGS)"		\
+        "ADA_INCLUDES=-I../rts"		\
+	"GNATMAKE=../../gnatmake"	\
+	"GNATLINK=../../gnatlink"	\
+	"GNATBIND=../../gnatbind"
+
+GCC_LINK=$(CC) -static-libgcc $(LDFLAGS)
+
+# Lists of files for various purposes.
+
+# Languages-specific object files for Ada.
+# Object files for gnat1 from C sources.
+GNAT1_C_OBJS = ada/b_gnat1.o ada/adadecode.o ada/adaint.o ada/cstreams.o \
+ ada/cio.o ada/targtyps.o ada/decl.o ada/misc.o ada/utils.o ada/utils2.o \
+ ada/trans.o ada/cuintp.o ada/argv.o ada/raise.o ada/init.o ada/tracebak.o \
+ ada/initialize.o ada/env.o
+
+# Object files from Ada sources that are used by gnat1
+
+GNAT_ADA_OBJS = ada/ada.o ada/a-charac.o ada/a-chlat1.o ada/a-except.o \
+ ada/a-elchha.o ada/a-ioexce.o \
+ ada/s-memory.o ada/s-carun8.o ada/s-casuti.o ada/s-strcom.o ada/s-purexc.o \
+ ada/s-htable.o ada/s-traceb.o ada/s-mastop.o ada/ali.o \
+ ada/alloc.o ada/atree.o ada/butil.o ada/casing.o ada/checks.o ada/comperr.o \
+ ada/csets.o ada/cstand.o ada/debug.o ada/debug_a.o ada/einfo.o ada/elists.o \
+ ada/errout.o ada/erroutc.o ada/err_vars.o ada/eval_fat.o ada/exp_attr.o \
+ ada/exp_ch11.o ada/exp_ch12.o ada/exp_ch13.o ada/exp_ch2.o ada/exp_ch3.o \
+ ada/exp_ch4.o ada/exp_ch5.o ada/exp_ch6.o ada/exp_ch7.o ada/exp_ch8.o \
+ ada/exp_ch9.o ada/exp_code.o ada/exp_dbug.o ada/exp_disp.o ada/exp_atag.o \
+ ada/exp_dist.o ada/exp_fixd.o ada/exp_aggr.o ada/exp_imgv.o ada/exp_intr.o \
+ ada/exp_pakd.o ada/exp_prag.o ada/exp_sel.o ada/exp_smem.o ada/exp_strm.o \
+ ada/exp_tss.o ada/exp_util.o ada/exp_vfpt.o ada/expander.o ada/fname.o \
+ ada/fname-uf.o ada/fmap.o ada/freeze.o ada/frontend.o ada/gnat.o \
+ ada/g-byorma.o \
+ ada/g-hesora.o ada/g-htable.o ada/s-os_lib.o \
+ ada/g-speche.o ada/g-spchge.o ada/g-u3spch.o ada/s-string.o \
+ ada/s-utf_32.o ada/s-crc32.o ada/get_targ.o \
+ ada/gnatvsn.o ada/hlo.o ada/hostparm.o ada/impunit.o ada/interfac.o \
+ ada/itypes.o ada/inline.o ada/krunch.o ada/lib.o ada/layout.o \
+ ada/lib-load.o ada/lib-util.o ada/lib-xref.o ada/lib-writ.o ada/live.o \
+ ada/namet.o ada/namet-sp.o \
+ ada/nlists.o ada/nmake.o ada/opt.o ada/osint.o ada/osint-c.o \
+ ada/output.o \
+ ada/par.o ada/prep.o ada/prepcomp.o ada/repinfo.o ada/restrict.o \
+ ada/rident.o ada/rtsfind.o \
+ ada/s-addope.o ada/s-assert.o ada/s-parame.o ada/s-stache.o \
+ ada/s-stalib.o ada/s-imgenu.o ada/s-imenne.o ada/s-stoele.o ada/s-soflin.o \
+ ada/s-except.o ada/s-exctab.o \
+ ada/s-secsta.o ada/s-strops.o ada/s-sopco3.o ada/s-sopco4.o ada/s-sopco5.o \
+ ada/s-traent.o ada/s-wchcnv.o ada/s-wchcon.o ada/s-wchjis.o \
+ ada/s-unstyp.o ada/scans.o ada/scng.o ada/scn.o ada/sdefault.o ada/sem.o \
+ ada/sem_aggr.o ada/sem_attr.o ada/sem_aux.o \
+ ada/sem_cat.o ada/sem_ch10.o ada/sem_ch11.o \
+ ada/sem_ch12.o ada/sem_ch13.o ada/sem_ch2.o ada/sem_ch3.o ada/sem_ch4.o \
+ ada/sem_ch5.o  ada/sem_ch6.o ada/sem_ch7.o ada/sem_ch8.o ada/sem_ch9.o \
+ ada/sem_case.o ada/sem_disp.o ada/sem_dist.o ada/sem_elab.o ada/sem_elim.o \
+ ada/sem_eval.o ada/sem_intr.o ada/sem_maps.o ada/sem_mech.o ada/sem_prag.o \
+ ada/sem_res.o ada/sem_smem.o ada/sem_type.o ada/sem_util.o ada/sem_vfpt.o \
+ ada/sem_warn.o ada/sinfo-cn.o ada/sinfo.o ada/sinput.o ada/sinput-d.o \
+ ada/sinput-l.o ada/snames.o ada/sprint.o ada/stand.o ada/stringt.o \
+ ada/style.o ada/styleg.o ada/styleg-c.o ada/switch.o ada/switch-c.o \
+ ada/stylesw.o ada/validsw.o ada/system.o ada/table.o ada/targparm.o \
+ ada/tbuild.o ada/tree_gen.o ada/tree_in.o \
+ ada/tree_io.o ada/treepr.o ada/treeprs.o \
+ ada/ttypef.o ada/ttypes.o ada/types.o ada/uintp.o ada/uname.o ada/urealp.o \
+ ada/usage.o ada/widechar.o ada/s-crtl.o ada/seh_init.o ada/targext.o \
+ ada/s-restri.o
+
+# Object files for gnat executables
+GNAT1_ADA_OBJS = $(GNAT_ADA_OBJS) ada/back_end.o ada/gnat1drv.o
+
+GNAT1_OBJS = $(GNAT1_C_OBJS) $(GNAT1_ADA_OBJS) $(EXTRA_GNAT1_OBJS)
+
+GNATBIND_OBJS = \
+ ada/adaint.o     \
+ ada/argv.o       \
+ ada/exit.o       \
+ ada/cio.o        \
+ ada/cstreams.o   \
+ ada/env.o        \
+ ada/final.o      \
+ ada/init.o       \
+ ada/initialize.o \
+ ada/seh_init.o   \
+ ada/link.o       \
+ ada/targext.o    \
+ ada/raise.o      \
+ ada/tracebak.o   \
+ ada/ada.o        \
+ ada/a-clrefi.o   \
+ ada/a-comlin.o   \
+ ada/a-elchha.o   \
+ ada/a-except.o   \
+ ada/ali-util.o   \
+ ada/ali.o        \
+ ada/alloc.o      \
+ ada/atree.o      \
+ ada/bcheck.o     \
+ ada/binde.o      \
+ ada/binderr.o    \
+ ada/bindgen.o    \
+ ada/bindusg.o    \
+ ada/butil.o      \
+ ada/casing.o     \
+ ada/csets.o      \
+ ada/debug.o      \
+ ada/einfo.o      \
+ ada/elists.o     \
+ ada/err_vars.o   \
+ ada/errout.o     \
+ ada/erroutc.o    \
+ ada/fmap.o       \
+ ada/fname.o      \
+ ada/g-hesora.o   \
+ ada/g-htable.o   \
+ ada/s-os_lib.o   \
+ ada/s-string.o   \
+ ada/gnat.o       \
+ ada/gnatbind.o   \
+ ada/gnatvsn.o    \
+ ada/hostparm.o   \
+ ada/interfac.o   \
+ ada/lib.o        \
+ ada/namet.o      \
+ ada/nlists.o     \
+ ada/opt.o        \
+ ada/osint-b.o    \
+ ada/osint.o      \
+ ada/output.o     \
+ ada/rident.o     \
+ ada/s-addope.o   \
+ ada/s-assert.o   \
+ ada/s-carun8.o   \
+ ada/s-casuti.o   \
+ ada/s-crc32.o    \
+ ada/s-crtl.o     \
+ ada/s-except.o   \
+ ada/s-exctab.o   \
+ ada/s-htable.o   \
+ ada/s-imenne.o   \
+ ada/s-imgenu.o   \
+ ada/s-mastop.o   \
+ ada/s-memory.o   \
+ ada/s-parame.o   \
+ ada/s-restri.o   \
+ ada/s-secsta.o   \
+ ada/s-soflin.o   \
+ ada/s-sopco3.o   \
+ ada/s-sopco4.o   \
+ ada/s-sopco5.o   \
+ ada/s-stache.o   \
+ ada/s-stalib.o   \
+ ada/s-stoele.o   \
+ ada/s-strops.o   \
+ ada/s-traceb.o   \
+ ada/s-traent.o   \
+ ada/s-unstyp.o   \
+ ada/s-utf_32.o   \
+ ada/s-wchcnv.o   \
+ ada/s-wchcon.o   \
+ ada/s-wchjis.o   \
+ ada/scng.o       \
+ ada/scans.o      \
+ ada/sdefault.o   \
+ ada/sinfo.o      \
+ ada/sinput.o     \
+ ada/sinput-c.o   \
+ ada/snames.o     \
+ ada/stand.o      \
+ ada/stringt.o    \
+ ada/switch-b.o   \
+ ada/switch.o     \
+ ada/style.o      \
+ ada/styleg.o     \
+ ada/stylesw.o    \
+ ada/system.o     \
+ ada/table.o      \
+ ada/targparm.o   \
+ ada/tree_io.o    \
+ ada/types.o      \
+ ada/uintp.o      \
+ ada/uname.o      \
+ ada/urealp.o     \
+ ada/widechar.o   \
+ $(EXTRA_GNATBIND_OBJS)
+
+# List of extra object files linked in with various programs.
+EXTRA_GNAT1_OBJS = prefix.o
+EXTRA_GNATBIND_OBJS = prefix.o version.o
+
+# Language-independent object files.
+ADA_BACKEND = $(BACKEND) attribs.o
+
+# List of target dependent sources, overridden below as necessary
+TARGET_ADA_SRCS =
+
+# Needs to be built with CC=gcc
+# Since the RTL should be built with the latest compiler, remove the
+#  stamp target in the parent directory whenever gnat1 is rebuilt
+gnat1$(exeext): $(TARGET_ADA_SRCS) $(GNAT1_OBJS) $(ADA_BACKEND) $(LIBDEPS)
+	$(GCC_LINK) -o $@ $(GNAT1_OBJS) $(ADA_BACKEND) $(LIBS) $(SYSLIBS) $(GMPLIBS)
+	$(RM) stamp-gnatlib2 stamp-tools
+
+gnatbind$(exeext): ada/b_gnatb.o $(CONFIG_H) $(GNATBIND_OBJS)
+	$(GCC_LINK) -o $@ ada/b_gnatb.o $(GNATBIND_OBJS) $(ALL_CFLAGS) $(LIBS) $(SYSLIBS)
+
+# use cross-gcc
+gnat-cross: force
+	make $(GNAT1_ADA_OBJS) CC="gcc -B../stage1/" CFLAGS="-S -gnatp" \
+		$(FLAGS_TO_PASS) $(ADA_FLAGS_TO_PASS) HOST_CFLAGS= HOST_CC=cc
+
+gen-soccon: force
+	$(MAKE) -C ada $(FLAGS_TO_PASS)  \
+	   GNATLIBFLAGS="$(GNATLIBFLAGS)" \
+	   GNATLIBCFLAGS="$(GNATLIBCFLAGS)" \
+	   TARGET_LIBGCC2_CFLAGS="$(TARGET_LIBGCC2_CFLAGS)" \
+	   THREAD_KIND="$(THREAD_KIND)" \
+	   TRACE="$(TRACE)" \
+	   LIBGNAT_OBJS=gen-soccon \
+	   gnatlib
+
+
+# Build hooks:
+
+ada.all.cross:
+	-if [ -f gnatbind$(exeext) ] ; \
+	then \
+	  $(MV) gnatbind$(exeext)  gnatbind-cross$(exeext); \
+	fi
+	-if [ -f gnatchop$(exeext) ] ; \
+	then \
+	  $(MV) gnatchop$(exeext)   gnatchop-cross$(exeext); \
+	fi
+	-if [ -f gnat$(exeext) ] ; \
+	then \
+	   $(MV) gnat$(exeext)  gnat-cross$(exeext); \
+	fi
+	-if [ -f gnatkr$(exeext) ] ; \
+	then \
+	  $(MV) gnatkr$(exeext)    gnatkr-cross$(exeext); \
+	fi
+	-if [ -f gnatlink$(exeext) ] ; \
+	then \
+	   $(MV) gnatlink$(exeext)  gnatlink-cross$(exeext); \
+	fi
+	-if [ -f gnatls$(exeext) ] ; \
+	then \
+	  $(MV) gnatls$(exeext)    gnatls-cross$(exeext); \
+	fi
+	-if [ -f gnatmake$(exeext) ] ; \
+	then \
+	   $(MV) gnatmake$(exeext)  gnatmake-cross$(exeext); \
+	fi
+	-if [ -f gnatname$(exeext) ] ; \
+	then \
+	   $(MV) gnatname$(exeext)  gnatname-cross$(exeext); \
+	fi
+	-if [ -f gnatprep$(exeext) ] ; \
+	then \
+	   $(MV) gnatprep$(exeext)  gnatprep-cross$(exeext); \
+	fi
+	-if [ -f gnatxref$(exeext) ] ; \
+	then \
+	   $(MV) gnatxref$(exeext)  gnatxref-cross$(exeext); \
+	fi
+	-if [ -f gnatfind$(exeext) ] ; \
+	then \
+	   $(MV) gnatfind$(exeext)  gnatfind-cross$(exeext); \
+	fi
+	-if [ -f gnatclean$(exeext) ] ; \
+	then \
+	   $(MV) gnatclean$(exeext)  gnatclean-cross$(exeext); \
+	fi
+	-if [ -f gnatsym$(exeext) ] ; \
+	then \
+	   $(MV) gnatsym$(exeext)  gnatsym-cross$(exeext); \
+	fi
+
+ada.start.encap:
+ada.rest.encap:
+ada.man:
+ada.srcextra:
+ada.srcman:
+
+ada.tags: force
+	cd $(srcdir)/ada && etags -o TAGS.sub *.c *.h *.ads *.adb && \
+	etags --include TAGS.sub --include ../TAGS.sub
+
+
+# Generate documentation.
+
+ada/doctools/xgnatugn$(build_exeext): ada/xgnatugn.adb
+	-$(MKDIR) ada/doctools
+	$(CP) $^ ada/doctools
+	cd ada/doctools && $(GNATMAKE) -q xgnatugn
+
+# Note that doc/gnat_ugn.texi does not depend on xgnatugn
+# being built so we can distribute a pregenerated doc/gnat_ugn.info
+
+doc/gnat_ugn.texi: $(srcdir)/ada/gnat_ugn.texi $(srcdir)/ada/ug_words \
+   $(gcc_docdir)/include/gcc-common.texi gcc-vers.texi
+	$(MAKE) ada/doctools/xgnatugn$(build_exeext)
+	ada/doctools/xgnatugn unw $(srcdir)/ada/gnat_ugn.texi \
+	   $(srcdir)/ada/ug_words doc/gnat_ugn.texi
+
+doc/gnat_ugn.info: doc/gnat_ugn.texi			\
+   $(gcc_docdir)/include/fdl.texi $(gcc_docdir)/include/gcc-common.texi	\
+   gcc-vers.texi
+	if [ x$(BUILD_INFO) = xinfo ]; then \
+	  rm -f $(@)*; \
+	  $(MAKEINFO) $(MAKEINFOFLAGS) -I$(gcc_docdir)/include \
+            -I$(srcdir)/ada -o $@ $<; \
+	else true; fi
+
+doc/gnat_rm.info: ada/gnat_rm.texi $(gcc_docdir)/include/fdl.texi	\
+   $(gcc_docdir)/include/gcc-common.texi gcc-vers.texi
+	if [ x$(BUILD_INFO) = xinfo ]; then \
+	  rm -f $(@)*; \
+	  $(MAKEINFO) $(MAKEINFOFLAGS) -I$(gcc_docdir)/include \
+            -I$(srcdir)/ada -o $@ $<; \
+	else true; fi
+
+doc/gnat-style.info: ada/gnat-style.texi $(gcc_docdir)/include/fdl.texi	\
+   $(gcc_docdir)/include/gcc-common.texi gcc-vers.texi
+	if [ x$(BUILD_INFO) = xinfo ]; then \
+	  rm -f $(@)*; \
+	  $(MAKEINFO) $(MAKEINFOFLAGS) -I$(gcc_docdir)/include \
+            -I$(srcdir)/ada -o $@ $<; \
+	else true; fi
+
+ADA_INFOFILES = doc/gnat_ugn.info doc/gnat_ugn.texi \
+                doc/gnat_rm.info doc/gnat-style.info
+
+ada.info: $(ADA_INFOFILES)
+
+ada.srcinfo: $(ADA_INFOFILES)
+	-$(CP) $^ $(srcdir)/doc
+
+ada.install-info: $(DESTDIR)$(infodir)/gnat_ugn.info \
+	$(DESTDIR)$(infodir)/gnat_rm.info \
+	$(DESTDIR)$(infodir)/gnat-style.info
+
+ada.dvi: doc/gnat_ugn.dvi \
+      doc/gnat_rm.dvi doc/gnat-style.dvi
+
+ADA_PDFFILES = doc/gnat_ugn.pdf \
+               doc/gnat_rm.pdf doc/gnat-style.pdf
+
+ada.pdf: $(ADA_PDFFILES)
+
+ada.install-pdf: $(ADA_PDFFILES)
+	@$(NORMAL_INSTALL)
+	test -z "$(pdfdir)/gcc" || $(mkinstalldirs) "$(DESTDIR)$(pdfdir)/gcc"
+	@list='$(ADA_PDFFILES)'; for p in $$list; do \
+	  if test -f "$$p"; then d=; else d="$(srcdir)/"; fi; \
+	  f=$(pdf__strip_dir) \
+	  echo " $(INSTALL_DATA) '$$d$$p' '$(DESTDIR)$(pdfdir)/gcc/$$f'"; \
+	  $(INSTALL_DATA) "$$d$$p" "$(DESTDIR)$(pdfdir)/gcc/$$f"; \
+	done
+
+ada.html:
+
+doc/gnat_ugn.dvi: doc/gnat_ugn.texi $(gcc_docdir)/include/fdl.texi	\
+	$(gcc_docdir)/include/gcc-common.texi gcc-vers.texi
+	$(TEXI2DVI) -c -I $(abs_docdir)/include -o $@ $<
+
+doc/gnat_rm.dvi: ada/gnat_rm.texi $(gcc_docdir)/include/fdl.texi	\
+	$(gcc_docdir)/include/gcc-common.texi gcc-vers.texi
+	$(TEXI2DVI) -c -I $(abs_docdir)/include -o $@ $<
+
+doc/gnat-style.dvi: ada/gnat-style.texi $(gcc_docdir)/include/fdl.texi
+	$(TEXI2DVI) -c -I $(abs_docdir)/include -o $@ $<
+
+doc/gnat_ugn.pdf: doc/gnat_ugn.texi $(gcc_docdir)/include/fdl.texi	\
+	$(gcc_docdir)/include/gcc-common.texi gcc-vers.texi
+	$(TEXI2PDF) -c -I $(abs_docdir)/include -o $@ $<
+
+doc/gnat_rm.pdf: ada/gnat_rm.texi $(gcc_docdir)/include/fdl.texi	\
+	$(gcc_docdir)/include/gcc-common.texi gcc-vers.texi
+	$(TEXI2PDF) -c -I $(abs_docdir)/include -o $@ $<
+
+doc/gnat-style.pdf: ada/gnat-style.texi $(gcc_docdir)/include/fdl.texi
+	$(TEXI2PDF) -c -I $(abs_docdir)/include -o $@ $<
+
+
+# Install hooks:
+# gnat1 is installed elsewhere as part of $(COMPILERS).
+
+# Install the binder program as $(target_noncanonical)-gnatbind
+# and also as either gnatbind (if native) or $(tooldir)/bin/gnatbind
+# likewise for gnatf, gnatchop, and gnatlink, gnatkr, gnatmake, gnat,
+# gnatprep, gnatls, gnatxref, gnatfind, gnatname, gnatclean,
+# gnatsym
+ada.install-common:
+	$(MKDIR) $(DESTDIR)$(bindir)
+	-if [ -f gnat1$(exeext) ] ; \
+	 then \
+	  if [ -f gnatbind-cross$(exeext) ] ; \
+	  then \
+	    $(RM) $(DESTDIR)$(bindir)/$(target_noncanonical)-gnatbind$(exeext); \
+	    $(INSTALL_PROGRAM) gnatbind-cross$(exeext) $(DESTDIR)$(bindir)/$(target_noncanonical)-gnatbind$(exeext); \
+	    if [ -d $(DESTDIR)$(tooldir)/bin/. ] ; then \
+	      rm -f $(DESTDIR)$(tooldir)/bin/gnatbind$(exeext); \
+	      $(INSTALL_PROGRAM) gnatbind-cross$(exeext) $(DESTDIR)$(tooldir)/bin/gnatbind$(exeext); \
+	    fi; \
+	  else \
+	    $(RM) $(DESTDIR)$(bindir)/gnatbind$(exeext); \
+	    $(INSTALL_PROGRAM) gnatbind$(exeext) $(DESTDIR)$(bindir)/gnatbind$(exeext); \
+	  fi ; \
+	fi
+	-if [ -f gnat1$(exeext) ] ; \
+	then \
+	  if [ -f gnatchop-cross$(exeext) ] ; \
+	  then \
+	    $(RM) $(DESTDIR)$(bindir)/$(target_noncanonical)-gnatchop$(exeext); \
+	    $(INSTALL_PROGRAM) gnatchop-cross$(exeext) $(DESTDIR)$(bindir)/$(target_noncanonical)-gnatchop$(exeext); \
+	    if [ -d $(DESTDIR)$(tooldir)/bin/. ] ; then \
+	       rm -f $(DESTDIR)$(tooldir)/bin/gnatchop$(exeext); \
+	       $(INSTALL_PROGRAM) gnatchop-cross$(exeext) $(DESTDIR)$(tooldir)/bin/gnatchop$(exeext); \
+	    fi ; \
+	  else \
+	    $(RM) $(DESTDIR)$(bindir)/gnatchop$(exeext); \
+	    $(INSTALL_PROGRAM) gnatchop$(exeext) $(DESTDIR)$(bindir)/gnatchop$(exeext); \
+	  fi ; \
+	fi
+	-if [ -f gnat1$(exeext) ] ; \
+	then \
+	  if [ -f gnat-cross$(exeext) ] ; \
+	  then \
+	    $(RM) $(DESTDIR)$(bindir)/$(target_noncanonical)-gnat$(exeext); \
+	    $(INSTALL_PROGRAM) gnat-cross$(exeext) $(DESTDIR)$(bindir)/$(target_noncanonical)-gnat$(exeext); \
+	    if [ -d $(DESTDIR)$(tooldir)/bin/. ] ; then \
+	       rm -f $(DESTDIR)$(tooldir)/bin/gnat$(exeext); \
+	       $(INSTALL_PROGRAM) gnat-cross$(exeext) $(DESTDIR)$(tooldir)/bin/gnat$(exeext); \
+	    fi; \
+	  else \
+	    $(RM) $(DESTDIR)$(bindir)/gnat$(exeext); \
+	    $(INSTALL_PROGRAM) gnat$(exeext) $(DESTDIR)$(bindir)/gnat$(exeext); \
+	  fi ; \
+	fi
+	-if [ -f gnat1$(exeext) ] ; \
+	then \
+	  if [ -f gnatkr-cross$(exeext) ] ; \
+	  then \
+	    $(RM) $(DESTDIR)$(bindir)/$(target_noncanonical)-gnatkr$(exeext); \
+	    $(INSTALL_PROGRAM) gnatkr-cross$(exeext) $(DESTDIR)$(bindir)/$(target_noncanonical)-gnatkr$(exeext); \
+	    if [ -d $(DESTDIR)$(tooldir)/bin/. ] ; then \
+	       rm -f $(DESTDIR)$(tooldir)/bin/gnatkr$(exeext); \
+	       $(INSTALL_PROGRAM) gnatkr-cross$(exeext) $(DESTDIR)$(tooldir)/bin/gnatkr$(exeext); \
+	    fi; \
+	  else \
+	    $(RM) $(DESTDIR)$(bindir)/gnatkr$(exeext); \
+	    $(INSTALL_PROGRAM) gnatkr$(exeext) $(DESTDIR)$(bindir)/gnatkr$(exeext); \
+	  fi ; \
+	fi
+	-if [ -f gnat1$(exeext) ] ; \
+	then \
+	  if [ -f gnatlink-cross$(exeext) ] ; \
+	  then \
+	    $(RM) $(DESTDIR)$(bindir)/$(target_noncanonical)-gnatlink$(exeext); \
+	    $(INSTALL_PROGRAM) gnatlink-cross$(exeext) $(DESTDIR)$(bindir)/$(target_noncanonical)-gnatlink$(exeext); \
+	    if [ -d $(DESTDIR)$(tooldir)/bin/. ] ; then \
+	       rm -f $(DESTDIR)$(tooldir)/bin/gnatlink$(exeext); \
+	       $(INSTALL_PROGRAM) gnatlink-cross$(exeext) $(DESTDIR)$(tooldir)/bin/gnatlink$(exeext); \
+	    fi; \
+	  else \
+	    $(RM) $(DESTDIR)$(bindir)/gnatlink$(exeext); \
+	    $(INSTALL_PROGRAM) gnatlink$(exeext) $(DESTDIR)$(bindir)/gnatlink$(exeext); \
+	  fi ; \
+	fi
+	-if [ -f gnat1$(exeext) ] ; \
+	then \
+	  if [ -f gnatls-cross$(exeext) ] ; \
+	  then \
+	    $(RM) $(DESTDIR)$(bindir)/$(target_noncanonical)-gnatls$(exeext); \
+	    $(INSTALL_PROGRAM) gnatls-cross$(exeext) $(DESTDIR)$(bindir)/$(target_noncanonical)-gnatls$(exeext); \
+	    if [ -d $(DESTDIR)$(tooldir)/bin/. ] ; then \
+	       rm -f $(DESTDIR)$(tooldir)/bin/gnatls$(exeext); \
+	       $(INSTALL_PROGRAM) gnatls-cross$(exeext) $(DESTDIR)$(tooldir)/bin/gnatls$(exeext); \
+	    fi; \
+	  else \
+	    $(RM) $(DESTDIR)$(bindir)/gnatls$(exeext); \
+	    $(INSTALL_PROGRAM) gnatls$(exeext) $(DESTDIR)$(bindir)/gnatls$(exeext); \
+	  fi ; \
+	fi
+	-if [ -f gnat1$(exeext) ] ; \
+	then \
+	  if [ -f gnatmake-cross$(exeext) ] ; \
+	  then \
+	    $(RM) $(DESTDIR)$(bindir)/$(target_noncanonical)-gnatmake$(exeext); \
+	    $(INSTALL_PROGRAM) gnatmake-cross$(exeext) $(DESTDIR)$(bindir)/$(target_noncanonical)-gnatmake$(exeext); \
+	    if [ -d $(DESTDIR)$(tooldir)/bin/. ] ; then \
+	       rm -f $(DESTDIR)$(tooldir)/bin/gnatmake$(exeext); \
+	       $(INSTALL_PROGRAM) gnatmake-cross$(exeext) $(DESTDIR)$(tooldir)/bin/gnatmake$(exeext); \
+	    fi; \
+	  else \
+	    $(RM) $(DESTDIR)$(bindir)/gnatmake$(exeext); \
+	    $(INSTALL_PROGRAM) gnatmake$(exeext) $(DESTDIR)$(bindir)/gnatmake$(exeext); \
+	  fi ; \
+	fi
+	-if [ -f gnat1$(exeext) ] ; \
+	then \
+	  if [ -f gnatname-cross$(exeext) ] ; \
+	  then \
+	    $(RM) $(DESTDIR)$(bindir)/$(target_noncanonical)-gnatname$(exeext); \
+	    $(INSTALL_PROGRAM) gnatname-cross$(exeext) $(DESTDIR)$(bindir)/$(target_noncanonical)-gnatname$(exeext); \
+	  else \
+	    $(RM) $(DESTDIR)$(bindir)/gnatname$(exeext); \
+	    $(INSTALL_PROGRAM) gnatname$(exeext) $(DESTDIR)$(bindir)/gnatname$(exeext); \
+	  fi ; \
+	fi
+	-if [ -f gnat1$(exeext) ] ; \
+	then \
+	  if [ -f gnatprep-cross$(exeext) ] ; \
+	  then \
+	    $(RM) $(DESTDIR)$(bindir)/$(target_noncanonical)-gnatprep$(exeext); \
+	    $(INSTALL_PROGRAM) gnatprep-cross$(exeext) $(DESTDIR)$(bindir)/$(target_noncanonical)-gnatprep$(exeext); \
+	    if [ -d $(DESTDIR)$(tooldir)/bin/. ] ; then \
+	       rm -f $(DESTDIR)$(tooldir)/bin/gnatprep$(exeext); \
+	       $(INSTALL_PROGRAM) gnatprep-cross$(exeext) $(DESTDIR)$(tooldir)/bin/gnatprep$(exeext); \
+	    fi; \
+	  else \
+	    $(RM) $(DESTDIR)$(bindir)/gnatprep$(exeext); \
+	    $(INSTALL_PROGRAM) gnatprep$(exeext) $(DESTDIR)$(bindir)/gnatprep$(exeext); \
+	  fi ; \
+	fi
+	-if [ -f gnat1$(exeext) ] ; \
+	then \
+	  if [ -f gnatxref-cross$(exeext) ] ; \
+	  then \
+	    $(RM) $(DESTDIR)$(bindir)/$(target_noncanonical)-gnatxref$(exeext); \
+	    $(INSTALL_PROGRAM) gnatxref-cross$(exeext) $(DESTDIR)$(bindir)/$(target_noncanonical)-gnatxref$(exeext); \
+	  else \
+	    $(RM) $(DESTDIR)$(bindir)/gnatxref$(exeext); \
+	    $(INSTALL_PROGRAM) gnatxref$(exeext) $(DESTDIR)$(bindir)/gnatxref$(exeext); \
+	  fi ; \
+	fi
+	-if [ -f gnat1$(exeext) ] ; \
+	then \
+	  if [ -f gnatfind-cross$(exeext) ] ; \
+	  then \
+	    $(RM) $(DESTDIR)$(bindir)/$(target_noncanonical)-gnatfind$(exeext); \
+	    $(INSTALL_PROGRAM) gnatfind-cross$(exeext) $(DESTDIR)$(bindir)/$(target_noncanonical)-gnatfind$(exeext); \
+	  else \
+	    $(RM) $(DESTDIR)$(bindir)/gnatfind$(exeext); \
+	    $(INSTALL_PROGRAM) gnatfind$(exeext) $(DESTDIR)$(bindir)/gnatfind$(exeext); \
+	  fi ; \
+	fi
+	-if [ -f gnat1$(exeext) ] ; \
+	then \
+	  if [ -f gnatclean-cross$(exeext) ] ; \
+	  then \
+	    $(RM) $(DESTDIR)$(bindir)/$(target_noncanonical)-gnatclean$(exeext); \
+	    $(INSTALL_PROGRAM) gnatclean-cross$(exeext) $(DESTDIR)$(bindir)/$(target_noncanonical)-gnatclean$(exeext); \
+	  else \
+	    $(RM) $(DESTDIR)$(bindir)/gnatclean$(exeext); \
+	    $(INSTALL_PROGRAM) gnatclean$(exeext) $(DESTDIR)$(bindir)/gnatclean$(exeext); \
+	  fi ; \
+	fi
+#
+# Gnatsym is only built on some platforms, including VMS
+#
+	-if [ -f gnat1$(exeext) ] ; \
+	then \
+	  if [ -f gnatsym$(exeext) ] ; \
+	  then \
+	    $(RM) $(DESTDIR)$(bindir)/gnatsym$(exeext); \
+	    $(INSTALL_PROGRAM) gnatsym$(exeext) $(DESTDIR)$(bindir)/gnatsym$(exeext); \
+	  fi ; \
+	fi
+#
+# Gnatlbr is only used on VMS.
+#
+	-if [ -f gnat1$(exeext) ] ; \
+	then \
+	  if [ -f gnatlbr$(exeext) ] ; \
+	  then \
+	    $(RM) $(DESTDIR)$(bindir)/gnatlbr$(exeext); \
+	    $(INSTALL_PROGRAM) gnatlbr$(exeext) $(DESTDIR)$(bindir)/gnatlbr$(exeext); \
+	  fi ; \
+	fi
+#
+# Gnatdll is only used on Windows.
+#
+	-if [ -f gnat1$(exeext) ] ; \
+	then \
+	    $(RM) $(DESTDIR)$(bindir)/gnatdll$(exeext); \
+	    $(INSTALL_PROGRAM) gnatdll$(exeext) $(DESTDIR)$(bindir)/gnatdll$(exeext); \
+	fi
+#
+# vxaddr2line is only used for cross ports (it calls the underlying cross
+# addr2line).
+#
+	-if [ -f gnat1$(exeext) ] ; \
+	then \
+	  if [ -f vxaddr2line$(exeext) ] ; \
+	  then \
+	    $(RM) $(DESTDIR)$(bindir)/vxaddr2line$(exeext); \
+	    $(INSTALL_PROGRAM) vxaddr2line$(exeext) $(DESTDIR)$(bindir)/vxaddr2line$(exeext); \
+	  fi ; \
+	fi
+
+#
+# Finally, install the library
+#
+	-if [ -f gnat1$(exeext) ] ; \
+	then \
+	  $(MAKE) $(FLAGS_TO_PASS) $(ADA_FLAGS_TO_PASS) install-gnatlib; \
+	fi
+
+install-gnatlib:
+	$(MAKE) -C ada $(FLAGS_TO_PASS) $(ADA_FLAGS_TO_PASS) install-gnatlib$(LIBGNAT_TARGET)
+
+install-gnatlib-obj:
+	$(MAKE) -C ada $(FLAGS_TO_PASS) $(ADA_FLAGS_TO_PASS) install-gnatlib-obj
+
+ada.install-man:
+
+ada.uninstall:
+	-$(RM) $(DESTDIR)$(bindir)/gnatbind$(exeext)
+	-$(RM) $(DESTDIR)$(bindir)/gnatchop$(exeext)
+	-$(RM) $(DESTDIR)$(bindir)/gnat$(exeext)
+	-$(RM) $(DESTDIR)$(bindir)/gnatfind$(exeext)
+	-$(RM) $(DESTDIR)$(bindir)/gnatdll$(exeext)
+	-$(RM) $(DESTDIR)$(bindir)/gnatkr$(exeext)
+	-$(RM) $(DESTDIR)$(bindir)/gnatlbr$(exeext)
+	-$(RM) $(DESTDIR)$(bindir)/gnatlink$(exeext)
+	-$(RM) $(DESTDIR)$(bindir)/gnatls$(exeext)
+	-$(RM) $(DESTDIR)$(bindir)/gnatmake$(exeext)
+	-$(RM) $(DESTDIR)$(bindir)/gnatname$(exeext)
+	-$(RM) $(DESTDIR)$(bindir)/gnatprep$(exeext)
+	-$(RM) $(DESTDIR)$(bindir)/gnatxref$(exeext)
+	-$(RM) $(DESTDIR)$(bindir)/gnatclean$(exeext)
+	-$(RM) $(DESTDIR)$(bindir)/gnatsym$(exeext)
+	-$(RM) $(DESTDIR)$(bindir)/$(target_noncanonical)-gnatbind$(exeext)
+	-$(RM) $(DESTDIR)$(bindir)/$(target_noncanonical)-gnatchop$(exeext)
+	-$(RM) $(DESTDIR)$(bindir)/$(target_noncanonical)-gnat$(exeext)
+	-$(RM) $(DESTDIR)$(bindir)/$(target_noncanonical)-gnatfind$(exeext)
+	-$(RM) $(DESTDIR)$(bindir)/$(target_noncanonical)-gnatdll$(exeext)
+	-$(RM) $(DESTDIR)$(bindir)/$(target_noncanonical)-gnatkr$(exeext)
+	-$(RM) $(DESTDIR)$(bindir)/$(target_noncanonical)-gnatlbr$(exeext)
+	-$(RM) $(DESTDIR)$(bindir)/$(target_noncanonical)-gnatlink$(exeext)
+	-$(RM) $(DESTDIR)$(bindir)/$(target_noncanonical)-gnatls$(exeext)
+	-$(RM) $(DESTDIR)$(bindir)/$(target_noncanonical)-gnatmake$(exeext)
+	-$(RM) $(DESTDIR)$(bindir)/$(target_noncanonical)-gnatname$(exeext)
+	-$(RM) $(DESTDIR)$(bindir)/$(target_noncanonical)-gnatprep$(exeext)
+	-$(RM) $(DESTDIR)$(bindir)/$(target_noncanonical)-gnatxref$(exeext)
+	-$(RM) $(DESTDIR)$(bindir)/$(target_noncanonical)-gnatclean$(exeext)
+	-$(RM) $(DESTDIR)$(bindir)/$(target_noncanonical)-gnatsym$(exeext)
+	-$(RM) $(DESTDIR)$(tooldir)/bin/gnatbind$(exeext)
+	-$(RM) $(DESTDIR)$(tooldir)/bin/gnatchop$(exeext)
+	-$(RM) $(DESTDIR)$(tooldir)/bin/gnat$(exeext)
+	-$(RM) $(DESTDIR)$(tooldir)/bin/gnatfind$(exeext)
+	-$(RM) $(DESTDIR)$(tooldir)/bin/gnatdll$(exeext)
+	-$(RM) $(DESTDIR)$(tooldir)/bin/gnatkr$(exeext)
+	-$(RM) $(DESTDIR)$(tooldir)/bin/gnatlbr$(exeext)
+	-$(RM) $(DESTDIR)$(tooldir)/bin/gnatlink$(exeext)
+	-$(RM) $(DESTDIR)$(tooldir)/bin/gnatls$(exeext)
+	-$(RM) $(DESTDIR)$(tooldir)/bin/gnatmake$(exeext)
+	-$(RM) $(DESTDIR)$(tooldir)/bin/gnatname$(exeext)
+	-$(RM) $(DESTDIR)$(tooldir)/bin/gnatprep$(exeext)
+	-$(RM) $(DESTDIR)$(tooldir)/bin/gnatxref$(exeext)
+	-$(RM) $(DESTDIR)$(tooldir)/bin/gnatclean$(exeext)
+	-$(RM) $(DESTDIR)$(tooldir)/bin/gnatsym$(exeext)
+# Gnatlbr and Gnatchop are only used on VMS
+	-$(RM) $(DESTDIR)$(bindir)/gnatlbr$(exeext) $(DESTDIR)$(bindir)/gnatchop$(exeext)
+
+# Clean hooks:
+# A lot of the ancillary files are deleted by the main makefile.
+# We just have to delete files specific to us.
+
+ada.mostlyclean:
+	-$(RM) ada/*$(objext) ada/*.ali ada/b_*.c
+	-$(RM) ada/*$(coverageexts)
+	-$(RM) ada/sdefault.adb ada/stamp-sdefault
+	-$(RMDIR) ada/tools
+ada.clean:
+ada.distclean:
+	-$(RM) ada/Makefile
+	-$(RM) gnatchop$(exeext)
+	-$(RM) gnat$(exeext)
+	-$(RM) gnatdll$(exeext)
+	-$(RM) gnatkr$(exeext)
+	-$(RM) gnatlink$(exeext)
+	-$(RM) gnatls$(exeext)
+	-$(RM) gnatmake$(exeext)
+	-$(RM) gnatname$(exeext)
+	-$(RM) gnatprep$(exeext)
+	-$(RM) gnatfind$(exeext)
+	-$(RM) gnatxref$(exeext)
+	-$(RM) gnatclean$(exeext)
+	-$(RM) gnatsym$(exeext)
+# Gnatlbr is only used on VMS
+	-$(RM) gnatlbr$(exeext)
+	-$(RM) ada/rts/*
+	-$(RMDIR) ada/rts
+	-$(RM) ada/tools/*
+	-$(RMDIR) ada/tools
+ada.maintainer-clean:
+	-$(RM) ada/sinfo.h
+	-$(RM) ada/einfo.h
+	-$(RM) ada/nmake.adb
+	-$(RM) ada/nmake.ads
+	-$(RM) ada/treeprs.ads
+
+# Stage hooks:
+# The main makefile has already created stage?/ada
+
+ada.stage1: stage1-start
+	-$(MV) ada/*$(objext) ada/*.ali ada/b_*.c stage1/ada
+	-$(MV) ada/stamp-* stage1/ada
+ada.stage2: stage2-start
+	-$(MV) ada/*$(objext) ada/*.ali ada/b_*.c stage2/ada
+	-$(MV) ada/stamp-* stage2/ada
+ada.stage3: stage3-start
+	-$(MV) ada/*$(objext) ada/*.ali ada/b_*.c stage3/ada
+	-$(MV) ada/stamp-* stage3/ada
+ada.stage4: stage4-start
+	-$(MV) ada/*$(objext) ada/*.ali ada/b_*.c stage4/ada
+	-$(MV) ada/stamp-* stage4/ada
+ada.stageprofile: stageprofile-start
+	-$(MV) ada/*$(objext) ada/*.ali ada/b_*.c stageprofile/ada
+	-$(MV) ada/stamp-* stageprofile/ada
+ada.stagefeedback: stagefeedback-start
+	-$(MV) ada/*$(objext) ada/*.ali ada/b_*.c stagefeedback/ada
+	-$(MV) ada/stamp-* stagefeedback/ada
+
+lang_checks += check-gnat
+
+check-ada: check-acats check-gnat
+
+ACATSDIR = $(TESTSUITEDIR)/ada/acats
+
+check-acats:
+	test -d $(ACATSDIR) || mkdir -p $(ACATSDIR)
+	testdir=`cd ${srcdir}/${ACATSDIR} && ${PWD_COMMAND}`; \
+	export testdir; cd $(ACATSDIR) && $(SHELL) $${testdir}/run_acats $(CHAPTERS)
+
+.PHONY: check-acats
+
+
+# Bootstrapping targets for just GNAT - use the same stage directories
+gnatboot: force
+	-$(RM) gnatboot3
+	$(MAKE) gnat1$(exeext) gnatbind$(exeext) CC="$(CC)" \
+		CFLAGS="$(CFLAGS)"
+	$(MAKE) gnatboot2 BOOT_CFLAGS="$(BOOT_CFLAGS)" \
+	                  BOOT_ADAFLAGS="$(BOOT_ADAFLAGS)" \
+	                  LDFLAGS="$(BOOT_LDFLAGS)"
+
+gnatboot2: force
+	$(MAKE) gnatstage1
+	$(MAKE) gnat1$(exeext) gnatbind$(exeext)  CC="gcc -B../stage1/"\
+				CFLAGS="$(BOOT_CFLAGS)" \
+	        		ADAFLAGS="$(BOOT_ADAFLAGS)"\
+				LDFLAGS="$(BOOT_LDFLAGS)" \
+				GNATBIND="../stage1/gnatbind"
+	$(MAKE) gnatboot3 BOOT_CFLAGS="$(BOOT_CFLAGS)" \
+			    BOOT_ADAFLAGS="$(BOOT_ADAFLAGS)" \
+			    LDFLAGS="$(BOOT_LDFLAGS)"
+
+gnatboot3:
+	$(MAKE) gnatstage2
+	$(MAKE) gnat1$(exeext) gnatbind$(exeext)  CC="gcc -B../stage2/"\
+				CFLAGS="$(BOOT_CFLAGS)" \
+	        		ADAFLAGS="$(BOOT_ADAFLAGS)"\
+				LDFLAGS="$(BOOT_LDFLAGS)" \
+				GNATBIND="../stage2/gnatbind"
+
+gnatstage1: force
+	-$(MKDIR) stage1
+	-$(MKDIR) stage1/ada
+	-$(MV) gnat1$(exeext) gnatbind$(exeext) stage1
+	-$(MV) ada/*$(objext) ada/*.ali stage1/ada
+	-$(MV) ada/stamp-* stage1/ada
+
+gnatstage2: force
+	-$(MKDIR) stage2
+	-$(MKDIR) stage2/ada
+	-$(MV) gnat1$(exeext) gnatbind$(exeext) stage2
+	-$(MV) ada/*$(objext) ada/*.ali stage2/ada
+	-$(MV) ada/stamp-* stage2/ada
+
+# Compiling object files from source files.
+
+# Note that dependencies on obstack.h are not written
+# because that file is not part of GCC.
+# Dependencies on gvarargs.h are not written
+# because all that file does, when not compiling with GCC,
+# is include the system varargs.h.
+
+# Ada language specific files.
+
+ada_extra_files : ada/treeprs.ads ada/einfo.h ada/sinfo.h ada/nmake.adb \
+	ada/nmake.ads
+
+ada/b_gnat1.c : $(GNAT1_ADA_OBJS)
+	$(GNATBIND) -C $(ADA_INCLUDES) -o ada/b_gnat1.c -n ada/gnat1drv.ali
+ada/b_gnat1.o : ada/b_gnat1.c
+
+ada/b_gnatb.c : $(GNATBIND_OBJS) ada/gnatbind.o ada/interfac.o
+	$(GNATBIND) -C $(ADA_INCLUDES) -o ada/b_gnatb.c ada/gnatbind.ali
+ada/b_gnatb.o : ada/b_gnatb.c
+
+# We delete the files before copying, below, in case they are read-only.
+ada/treeprs.ads : ada/treeprs.adt ada/sinfo.ads ada/xtreeprs.adb
+	-$(MKDIR) ada/bldtools/treeprs
+	$(RM) $(addprefix ada/bldtools/treeprs/,$(notdir $^))
+	$(CP) $^ ada/bldtools/treeprs
+	(cd ada/bldtools/treeprs && $(GNATMAKE) -q xtreeprs && ./xtreeprs ../../treeprs.ads )
+
+ada/einfo.h : ada/einfo.ads ada/einfo.adb ada/xeinfo.adb
+	-$(MKDIR) ada/bldtools/einfo
+	$(RM) $(addprefix ada/bldtools/einfo/,$(notdir $^))
+	$(CP) $^ ada/bldtools/einfo
+	(cd ada/bldtools/einfo && $(GNATMAKE) -q xeinfo && ./xeinfo ../../einfo.h )
+
+ada/sinfo.h : ada/sinfo.ads ada/xsinfo.adb
+	-$(MKDIR) ada/bldtools/sinfo
+	$(RM) $(addprefix ada/bldtools/sinfo/,$(notdir $^))
+	$(CP) $^ ada/bldtools/sinfo
+	(cd ada/bldtools/sinfo && $(GNATMAKE) -q xsinfo && ./xsinfo ../../sinfo.h )
+
+ada/nmake.adb : ada/sinfo.ads ada/nmake.adt ada/xnmake.adb
+	-$(MKDIR) ada/bldtools/nmake_b
+	$(RM) $(addprefix ada/bldtools/nmake_b/,$(notdir $^))
+	$(CP) $^ ada/bldtools/nmake_b
+	(cd ada/bldtools/nmake_b && $(GNATMAKE) -q xnmake && ./xnmake -b ../../nmake.adb )
+
+ada/nmake.ads :  ada/sinfo.ads ada/nmake.adt ada/xnmake.adb ada/nmake.adb
+	-$(MKDIR) ada/bldtools/nmake_s
+	$(RM) $(addprefix ada/bldtools/nmake_s/,$(notdir $^))
+	$(CP) $^ ada/bldtools/nmake_s
+	(cd ada/bldtools/nmake_s && $(GNATMAKE) -q xnmake && ./xnmake -s ../../nmake.ads )
+
+update-sources : ada/treeprs.ads ada/einfo.h ada/sinfo.h ada/nmake.adb \
+	ada/nmake.ads
+	$(RM) $(addprefix $(srcdir)/ada/,$(notdir $^))
+	$(CP) $^ $(srcdir)/ada
+
+ada/sdefault.adb: ada/stamp-sdefault ; @true
+ada/stamp-sdefault : $(srcdir)/version.c Makefile
+	$(ECHO) "pragma Style_Checks (Off);" >tmp-sdefault.adb
+	$(ECHO) "with Osint; use Osint;" >>tmp-sdefault.adb
+	$(ECHO) "package body Sdefault is" >>tmp-sdefault.adb
+	$(ECHO) "   S0 : constant String := \"$(prefix)/\";" >>tmp-sdefault.adb
+	$(ECHO) "   S1 : constant String := \"$(ADA_INCLUDE_DIR)/\";" >>tmp-sdefault.adb
+	$(ECHO) "   S2 : constant String := \"$(ADA_RTL_OBJ_DIR)/\";" >>tmp-sdefault.adb
+	$(ECHO) "   S3 : constant String := \"$(target)/\";" >>tmp-sdefault.adb
+	$(ECHO) "   S4 : constant String := \"$(libsubdir)/\";" >>tmp-sdefault.adb
+	$(ECHO) "   function Include_Dir_Default_Name return String_Ptr is" >>tmp-sdefault.adb
+	$(ECHO) "   begin" >>tmp-sdefault.adb
+	$(ECHO) "      return Relocate_Path (S0, S1);" >>tmp-sdefault.adb
+	$(ECHO) "   end Include_Dir_Default_Name;" >>tmp-sdefault.adb
+	$(ECHO) "   function Object_Dir_Default_Name return String_Ptr is" >>tmp-sdefault.adb
+	$(ECHO) "   begin" >>tmp-sdefault.adb
+	$(ECHO) "      return Relocate_Path (S0, S2);" >>tmp-sdefault.adb
+	$(ECHO) "   end Object_Dir_Default_Name;" >>tmp-sdefault.adb
+	$(ECHO) "   function Target_Name return String_Ptr is" >>tmp-sdefault.adb
+	$(ECHO) "   begin" >>tmp-sdefault.adb
+	$(ECHO) "      return new String'(S3);" >>tmp-sdefault.adb
+	$(ECHO) "   end Target_Name;" >>tmp-sdefault.adb
+	$(ECHO) "   function Search_Dir_Prefix return String_Ptr is" >>tmp-sdefault.adb
+	$(ECHO) "   begin" >>tmp-sdefault.adb
+	$(ECHO) "      return Relocate_Path (S0, S4);" >>tmp-sdefault.adb
+	$(ECHO) "   end Search_Dir_Prefix;" >>tmp-sdefault.adb
+	$(ECHO) "end Sdefault;" >> tmp-sdefault.adb
+	$(srcdir)/../move-if-change tmp-sdefault.adb ada/sdefault.adb
+	touch ada/stamp-sdefault
+
+ada/sdefault.o : ada/ada.ads ada/a-except.ads ada/a-unccon.ads \
+   ada/a-uncdea.ads ada/alloc.ads ada/debug.ads ada/hostparm.ads ada/namet.ads \
+   ada/opt.ads ada/osint.ads ada/output.ads ada/sdefault.ads ada/sdefault.adb \
+   ada/s-exctab.ads ada/s-memory.ads ada/s-os_lib.ads ada/s-parame.ads \
+   ada/s-stalib.ads ada/s-strops.ads ada/s-sopco3.ads ada/s-sopco4.ads \
+   ada/s-sopco5.ads ada/s-string.ads ada/s-traent.ads ada/s-unstyp.ads \
+   ada/s-wchcon.ads ada/system.ads ada/table.adb ada/table.ads ada/tree_io.ads \
+   ada/types.ads ada/unchdeal.ads ada/unchconv.ads
+
+ADA_TREE_H = ada/gcc-interface/ada-tree.h
+
+# force debugging information on s-tasdeb.o so that it is always
+# possible to set conditional breakpoints on tasks.
+
+ada/s-tasdeb.o  : ada/s-tasdeb.adb ada/s-tasdeb.ads
+	$(CC) -c $(ALL_ADAFLAGS) $(FORCE_DEBUG_ADAFLAGS) -O0 $(ADA_INCLUDES) \
+	  $< $(OUTPUT_OPTION)
+
+# force debugging information on s-vaflop.o so that it is always
+# possible to call the VAX float debug print routines.
+# force at least -O so that the inline assembly works.
+
+ada/s-vaflop.o  : ada/s-vaflop.adb ada/s-vaflop.ads
+	$(CC) -c -O $(ALL_ADAFLAGS) $(FORCE_DEBUG_ADAFLAGS) $(ADA_INCLUDES) \
+	  $(OUTPUT_OPTION) $<
+
+# force debugging information on a-except.o so that it is always
+# possible to set conditional breakpoints on exceptions.
+# use -O1 otherwise gdb isn't able to get a full backtrace on mips targets.
+
+ada/a-except.o  : ada/a-except.adb ada/a-except.ads
+	$(CC) -c $(ALL_ADAFLAGS) $(FORCE_DEBUG_ADAFLAGS) -O1 -fno-inline \
+	 $(ADA_INCLUDES) $< $(OUTPUT_OPTION)
+
+# compile s-except.o without optimization and with debug info to let the
+# debugger set breakpoints and inspect subprogram parameters on exception
+# related events.
+
+ada/s-except.o  : ada/s-except.adb ada/s-except.ads
+	$(CC) -c $(ALL_ADAFLAGS) $(FORCE_DEBUG_ADAFLAGS) -O0 \
+	 $(ADA_INCLUDES) $< $(OUTPUT_OPTION)
+
+# force debugging information on s-assert.o so that it is always
+# possible to set breakpoint on assert failures.
+
+ada/s-assert.o  : ada/s-assert.adb ada/s-assert.ads ada/a-except.ads
+	$(CC) -c $(ALL_ADAFLAGS) $(FORCE_DEBUG_ADAFLAGS) -O2 \
+	 $(ADA_INCLUDES) $< $(OUTPUT_OPTION)
+
+# dependencies for windows specific tool (mdll)
+
+ada/mdll.o : ada/mdll.adb ada/mdll.ads ada/mdll-fil.ads ada/mdll-utl.ads
+	$(CC) -c $(ALL_ADAFLAGS) $(ADA_INCLUDES) $< $(OUTPUT_OPTION)
+
+ada/mdll-fil.o : ada/mdll-fil.adb ada/mdll.ads ada/mdll-fil.ads
+	$(CC) -c $(ALL_ADAFLAGS) $(ADA_INCLUDES) $< $(OUTPUT_OPTION)
+
+ada/mdll-utl.o : ada/mdll-utl.adb ada/mdll.ads ada/mdll-utl.ads ada/sdefault.ads ada/types.ads
+	$(CC) -c $(ALL_ADAFLAGS) $(ADA_INCLUDES) $< $(OUTPUT_OPTION)
+
+# force debugging information and no optimization on s-memory.o so that it
+# is always possible to set breakpoint on __gnat_malloc and __gnat_free
+# this is important for gnatmem using GDB. memtrack.o is built from
+# memtrack.adb, and used by the post-mortem analysis with gnatmem.
+
+ada/s-memory.o  : ada/s-memory.adb ada/s-memory.ads
+	$(CC) -c $(ALL_ADAFLAGS) $(FORCE_DEBUG_ADAFLAGS) -O0 \
+	 $(ADA_INCLUDES) $< $(OUTPUT_OPTION)
+
+ada/memtrack.o  : ada/memtrack.adb ada/s-memory.ads
+	$(CC) -c $(ALL_ADAFLAGS) $(FORCE_DEBUG_ADAFLAGS) -O0 \
+	 $(ADA_INCLUDES) $< $(OUTPUT_OPTION)
+
+ada/adadecode.o : ada/adadecode.c $(CONFIG_H) $(SYSTEM_H) ada/adadecode.h
+ada/adaint.o   : ada/adaint.c $(CONFIG_H) $(SYSTEM_H) ada/adaint.h
+ada/argv.o     : ada/argv.c $(CONFIG_H) $(SYSTEM_H) ada/adaint.h
+ada/cstreams.o : ada/cstreams.c $(CONFIG_H) $(SYSTEM_H) ada/adaint.h
+ada/exit.o     : ada/exit.c $(CONFIG_H) $(SYSTEM_H) ada/adaint.h
+ada/final.o    : ada/final.c $(CONFIG_H) $(SYSTEM_H) ada/raise.h
+ada/link.o     : ada/link.c
+
+
+ada/targext.o : ada/targext.c $(SYSTEM_H) coretypes.h $(TM_H)
+	$(CC) -c $(ALL_CFLAGS) $(ADA_CFLAGS) $(ALL_CPPFLAGS) $(INCLUDES) \
+		$< $(OUTPUT_OPTION)
+
+ada/cio.o     : ada/cio.c $(CONFIG_H) $(SYSTEM_H) ada/adaint.h
+	$(CC) -c $(ALL_CFLAGS) $(ALL_ADA_CFLAGS) \
+	         $(ALL_CPPFLAGS) $(INCLUDES) $< $(OUTPUT_OPTION)
+
+ada/init.o    : ada/init.c $(CONFIG_H) $(SYSTEM_H) ada/adaint.h ada/raise.h
+	$(CC) -c $(ALL_CFLAGS) $(ALL_ADA_CFLAGS) \
+	         $(ALL_CPPFLAGS) $(INCLUDES) $< $(OUTPUT_OPTION)
+
+ada/initialize.o : ada/initialize.c
+	$(CC) -c $(ALL_CFLAGS) $(ALL_ADA_CFLAGS) \
+	         $(ALL_CPPFLAGS) $(INCLUDES) $< $(OUTPUT_OPTION)
+
+ada/raise.o   : ada/raise.c $(CONFIG_H) $(SYSTEM_H) ada/adaint.h ada/raise.h
+	$(CC) -c $(ALL_CFLAGS) $(ALL_ADA_CFLAGS) \
+		 $(ALL_CPPFLAGS) $(INCLUDES) $< $(OUTPUT_OPTION)
+
+# Need to keep the frame pointer in this file to pop the stack properly on
+# some targets.
+ada/tracebak.o  : ada/tracebak.c $(CONFIG_H) $(SYSTEM_H)
+	$(CC) -c $(ALL_CFLAGS) $(ALL_ADA_CFLAGS) $(ALL_CPPFLAGS) $(INCLUDES) \
+	      -fno-omit-frame-pointer $< $(OUTPUT_OPTION)
+
+ada/cuintp.o : ada/gcc-interface/cuintp.c $(CONFIG_H) $(SYSTEM_H) coretypes.h $(TM_H) \
+   $(TREE_H) ada/gcc-interface/ada.h ada/types.h ada/uintp.h ada/atree.h ada/stringt.h \
+   ada/elists.h ada/nlists.h ada/fe.h ada/gcc-interface/gigi.h
+	$(CC) -c $(ALL_CFLAGS) -I.. $(ALL_CPPFLAGS) $< -o $@
+
+ada/decl.o : ada/gcc-interface/decl.c $(CONFIG_H) $(SYSTEM_H) coretypes.h \
+   $(TM_H) $(TREE_H) $(FLAGS_H) toplev.h convert.h $(TARGET_H) \
+   ada/gcc-interface/ada.h ada/types.h ada/atree.h \
+   ada/nlists.h ada/elists.h ada/uintp.h ada/sinfo.h ada/einfo.h ada/snames.h \
+   ada/namet.h ada/stringt.h ada/repinfo.h ada/fe.h $(ADA_TREE_H) \
+   ada/gcc-interface/gigi.h \
+   $(EXPR_H) gt-ada-decl.h
+	$(CC) -c $(ALL_CFLAGS) -I.. $(ALL_CPPFLAGS) $< -o $@
+
+ada/misc.o : ada/gcc-interface/misc.c $(CONFIG_H) $(SYSTEM_H) coretypes.h \
+   $(TM_H) $(TREE_H) \
+   $(RTL_H) $(EXPR_H) insn-codes.h insn-flags.h insn-config.h recog.h \
+   $(FLAGS_H) $(DIAGNOSTIC_H) output.h except.h $(TM_P_H) langhooks.h debug.h \
+   $(LANGHOOKS_DEF_H) libfuncs.h $(OPTABS_H) ada/gcc-interface/ada.h \
+   ada/types.h \
+   ada/atree.h ada/nlists.h ada/elists.h ada/sinfo.h ada/einfo.h ada/namet.h \
+   ada/stringt.h ada/uintp.h ada/fe.h $(ADA_TREE_H) ada/gcc-interface/gigi.h \
+   ada/adadecode.h opts.h options.h $(TARGET_H) $(REAL_H)
+	$(CC) -c $(ALL_CFLAGS) -I.. $(ALL_CPPFLAGS) $< -o $@
+
+ada/targtyps.o : ada/gcc-interface/targtyps.c $(CONFIG_H) $(SYSTEM_H) \
+   coretypes.h $(TM_H) \
+   $(TREE_H) ada/gcc-interface/ada.h ada/types.h ada/atree.h ada/nlists.h \
+   ada/elists.h \
+   ada/uintp.h ada/sinfo.h ada/einfo.h ada/namet.h ada/snames.h ada/stringt.h \
+   ada/urealp.h ada/fe.h $(ADA_TREE_H) ada/gcc-interface/gigi.h
+	$(CC) -c $(ALL_CFLAGS) -I.. $(ALL_CPPFLAGS) $< -o $@
+
+ada/trans.o : ada/gcc-interface/trans.c $(CONFIG_H) $(SYSTEM_H) coretypes.h \
+   $(TM_H) \
+   $(TREE_H) $(RTL_H) $(EXPR_H) $(FLAGS_H) $(FUNCTION_H) \
+   ada/gcc-interface/ada.h except.h \
+   ada/types.h ada/atree.h ada/nlists.h ada/elists.h ada/uintp.h ada/sinfo.h \
+   ada/einfo.h ada/namet.h ada/snames.h ada/stringt.h ada/urealp.h ada/fe.h \
+   $(ADA_TREE_H) ada/gcc-interface/gigi.h gt-ada-trans.h tree-iterator.h
+	$(CC) -c $(ALL_CFLAGS) -I.. $(ALL_CPPFLAGS) $< -o $@
+
+ada/utils.o : ada/gcc-interface/utils.c $(CONFIG_H) $(SYSTEM_H) coretypes.h \
+   $(TM_H) \
+   $(TREE_H) $(FLAGS_H) $(EXPR_H) convert.h defaults.h langhooks.h \
+   ada/gcc-interface/ada.h ada/types.h \
+   ada/atree.h ada/nlists.h ada/elists.h ada/sinfo.h \
+   ada/einfo.h ada/namet.h ada/stringt.h ada/uintp.h ada/fe.h $(ADA_TREE_H) \
+   ada/gcc-interface/gigi.h gt-ada-utils.h \
+   gtype-ada.h $(TARGET_H) tree-iterator.h
+	$(CC) -c $(ALL_CFLAGS) -I.. $(ALL_CPPFLAGS) $< -o $@
+
+ada/utils2.o : ada/gcc-interface/utils2.c $(CONFIG_H) $(SYSTEM_H) coretypes.h \
+   $(TM_H) $(TREE_H) $(FLAGS_H) ada/gcc-interface/ada.h ada/types.h \
+   ada/atree.h ada/nlists.h ada/elists.h ada/sinfo.h ada/einfo.h ada/namet.h \
+   ada/snames.h ada/stringt.h ada/uintp.h ada/fe.h $(ADA_TREE_H) \
+   ada/gcc-interface/gigi.h
+	$(CC) -c $(ALL_CFLAGS) -I.. $(ALL_CPPFLAGS) $< -o $@
+
+#
+# DO NOT PUT SPECIAL RULES BELOW, THIS SECTION IS UPDATED AUTOMATICALLY
+#
+# GNAT DEPENDENCIES
+# regular dependencies
+ada/a-charac.o : ada/ada.ads ada/a-charac.ads ada/system.ads 
+
+ada/a-chlat1.o : ada/ada.ads ada/a-charac.ads ada/a-chlat1.ads \
+   ada/system.ads 
+
+ada/a-clrefi.o : ada/ada.ads ada/a-comlin.ads ada/a-clrefi.ads \
+   ada/a-clrefi.adb ada/a-except.ads ada/a-unccon.ads ada/a-uncdea.ads \
+   ada/system.ads ada/s-exctab.ads ada/s-exctab.adb ada/s-htable.ads \
+   ada/s-os_lib.ads ada/s-parame.ads ada/s-secsta.ads ada/s-soflin.ads \
+   ada/s-stache.ads ada/s-stalib.ads ada/s-stoele.ads ada/s-stoele.adb \
+   ada/s-strops.ads ada/s-sopco3.ads ada/s-sopco4.ads ada/s-sopco5.ads \
+   ada/s-string.ads ada/s-traent.ads 
+
+ada/a-comlin.o : ada/ada.ads ada/a-comlin.ads ada/a-comlin.adb \
+   ada/a-unccon.ads ada/system.ads ada/s-secsta.ads ada/s-stoele.ads \
+   ada/s-stoele.adb 
+
+ada/a-elchha.o : ada/ada.ads ada/a-except.ads ada/a-elchha.ads \
+   ada/a-elchha.adb ada/a-unccon.ads ada/system.ads ada/s-parame.ads \
+   ada/s-soflin.ads ada/s-stache.ads ada/s-stalib.ads ada/s-stoele.ads \
+   ada/s-stoele.adb ada/s-traent.ads 
+
+ada/a-except.o : ada/ada.ads ada/a-except.ads ada/a-except.adb \
+   ada/a-exexda.adb ada/a-exextr.adb ada/a-elchha.ads ada/a-excpol.adb \
+   ada/a-exstat.adb ada/a-unccon.ads ada/system.ads ada/s-exctab.ads \
+   ada/s-except.ads ada/s-parame.ads ada/s-secsta.ads ada/s-soflin.ads \
+   ada/s-stache.ads ada/s-stalib.ads ada/s-stoele.ads ada/s-strops.ads \
+   ada/s-sopco3.ads ada/s-sopco4.ads ada/s-sopco5.ads ada/s-traent.ads 
+
+ada/a-ioexce.o : ada/ada.ads ada/a-except.ads ada/a-ioexce.ads \
+   ada/a-unccon.ads ada/system.ads ada/s-exctab.ads ada/s-exctab.adb \
+   ada/s-htable.ads ada/s-parame.ads ada/s-soflin.ads ada/s-stache.ads \
+   ada/s-stalib.ads ada/s-stoele.ads ada/s-stoele.adb ada/s-traent.ads 
+
+ada/ada.o : ada/ada.ads ada/system.ads 
+
+ada/ali-util.o : ada/ada.ads ada/a-except.ads ada/a-unccon.ads \
+   ada/a-uncdea.ads ada/ali.ads ada/ali-util.ads ada/ali-util.adb \
+   ada/alloc.ads ada/binderr.ads ada/casing.ads ada/csets.ads \
+   ada/debug.ads ada/err_vars.ads ada/gnat.ads ada/g-htable.ads \
+   ada/gnatvsn.ads ada/hostparm.ads ada/interfac.ads ada/namet.ads \
+   ada/namet.adb ada/opt.ads ada/osint.ads ada/output.ads ada/rident.ads \
+   ada/scans.ads ada/scng.ads ada/scng.adb ada/sinput.ads ada/sinput.adb \
+   ada/sinput-c.ads ada/snames.ads ada/stringt.ads ada/stringt.adb \
+   ada/styleg.ads ada/styleg.adb ada/stylesw.ads ada/system.ads \
+   ada/s-carun8.ads ada/s-crc32.ads ada/s-crc32.adb ada/s-exctab.ads \
+   ada/s-htable.ads ada/s-htable.adb ada/s-memory.ads ada/s-os_lib.ads \
+   ada/s-parame.ads ada/s-rident.ads ada/s-secsta.ads ada/s-soflin.ads \
+   ada/s-stache.ads ada/s-stalib.ads ada/s-stoele.ads ada/s-stoele.adb \
+   ada/s-strops.ads ada/s-sopco3.ads ada/s-sopco4.ads ada/s-sopco5.ads \
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+   ada/s-os_lib.ads ada/s-parame.ads ada/s-stalib.ads ada/s-strops.ads \
+   ada/s-sopco3.ads ada/s-sopco4.ads ada/s-sopco5.ads ada/s-string.ads \
+   ada/s-traent.ads ada/s-unstyp.ads ada/s-wchcon.ads ada/table.ads \
+   ada/table.adb ada/tree_io.ads ada/types.ads ada/uintp.ads ada/uintp.adb \
+   ada/unchconv.ads ada/unchdeal.ads ada/urealp.ads ada/urealp.adb 
+
+ada/usage.o : ada/ada.ads ada/a-except.ads ada/a-unccon.ads \
+   ada/a-uncdea.ads ada/alloc.ads ada/debug.ads ada/hostparm.ads \
+   ada/namet.ads ada/opt.ads ada/osint.ads ada/output.ads ada/rident.ads \
+   ada/system.ads ada/s-exctab.ads ada/s-memory.ads ada/s-os_lib.ads \
+   ada/s-parame.ads ada/s-rident.ads ada/s-stalib.ads ada/s-strops.ads \
+   ada/s-sopco3.ads ada/s-sopco4.ads ada/s-sopco5.ads ada/s-string.ads \
+   ada/s-traent.ads ada/s-unstyp.ads ada/s-wchcon.ads ada/table.ads \
+   ada/table.adb ada/targparm.ads ada/tree_io.ads ada/types.ads \
+   ada/unchconv.ads ada/unchdeal.ads ada/usage.ads ada/usage.adb 
+
+ada/validsw.o : ada/ada.ads ada/a-unccon.ads ada/a-uncdea.ads \
+   ada/debug.ads ada/hostparm.ads ada/opt.ads ada/system.ads \
+   ada/s-exctab.ads ada/s-stalib.ads ada/s-strops.ads ada/s-sopco3.ads \
+   ada/s-sopco4.ads ada/s-sopco5.ads ada/s-string.ads ada/s-unstyp.ads \
+   ada/s-wchcon.ads ada/types.ads ada/unchconv.ads ada/unchdeal.ads \
+   ada/validsw.ads ada/validsw.adb 
+
+ada/widechar.o : ada/ada.ads ada/a-except.ads ada/a-unccon.ads \
+   ada/a-uncdea.ads ada/debug.ads ada/hostparm.ads ada/interfac.ads \
+   ada/opt.ads ada/system.ads ada/s-exctab.ads ada/s-parame.ads \
+   ada/s-soflin.ads ada/s-stache.ads ada/s-stalib.ads ada/s-stoele.ads \
+   ada/s-stoele.adb ada/s-strops.ads ada/s-sopco3.ads ada/s-sopco4.ads \
+   ada/s-sopco5.ads ada/s-string.ads ada/s-traent.ads ada/s-unstyp.ads \
+   ada/s-wchcnv.ads ada/s-wchcnv.adb ada/s-wchcon.ads ada/s-wchjis.ads \
+   ada/types.ads ada/unchconv.ads ada/unchdeal.ads ada/widechar.ads \
+   ada/widechar.adb 
+
+# end of regular dependencies
diff --git a/gcc/ada/gcc-interface/Makefile.in b/gcc/ada/gcc-interface/Makefile.in
new file mode 100644
index 00000000000..fc96dcb1857
--- /dev/null
+++ b/gcc/ada/gcc-interface/Makefile.in
@@ -0,0 +1,2295 @@
+# Makefile for GNU Ada Compiler (GNAT).
+#   Copyright (C) 1994-2008 Free Software Foundation, Inc.
+
+#This file is part of GCC.
+
+#GCC is free software; you can redistribute it and/or modify
+#it under the terms of the GNU General Public License as published by
+#the Free Software Foundation; either version 3, or (at your option)
+#any later version.
+
+#GCC is distributed in the hope that it will be useful,
+#but WITHOUT ANY WARRANTY; without even the implied warranty of
+#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#GNU General Public License for more details.
+
+#You should have received a copy of the GNU General Public License
+#along with GCC; see the file COPYING3.  If not see
+#<http://www.gnu.org/licenses/>.
+
+# The makefile built from this file lives in the language subdirectory.
+# Its purpose is to provide support for:
+#
+# 1) recursion where necessary, and only then (building .o's), and
+# 2) building and debugging cc1 from the language subdirectory, and
+# 3) nothing else.
+#
+# The parent makefile handles all other chores, with help from the
+# language makefile fragment, of course.
+#
+# The targets for external use are:
+# all, TAGS, ???mostlyclean, ???clean.
+
+# This makefile will only work with Gnu make.
+# The rules are written assuming a minimum subset of tools are available:
+#
+# Required:
+#      MAKE:    Only Gnu make will work.
+#      MV:      Must accept (at least) one, maybe wildcard, source argument,
+#               a file or directory destination, and support creation/
+#               modification date preservation.  Gnu mv -f works.
+#      RM:      Must accept an arbitrary number of space separated file
+#               arguments, or one wildcard argument. Gnu rm works.
+#      RMDIR:   Must delete a directory and all its contents. Gnu rm -rf works.
+#      ECHO:    Must support command line redirection. Any Unix-like
+#               shell will typically provide this, otherwise a custom version
+#               is trivial to write.
+#      AR:      Gnu ar works.
+#      MKDIR:   Gnu mkdir works.
+#      CHMOD:   Gnu chmod works.
+#      true:    Does nothing and returns a normal successful return code.
+#      pwd:     Prints the current directory on stdout.
+#      cd:      Change directory.
+#
+# Optional:
+#      BISON:   Gnu bison works.
+#      FLEX:    Gnu flex works.
+#      Other miscellaneous tools for obscure targets.
+
+# Suppress smart makes who think they know how to automake Yacc files
+.y.c:
+
+# Variables that exist for you to override.
+# See below for how to change them for certain systems.
+
+# Various ways of specifying flags for compilations:
+# CFLAGS is for the user to override to, e.g., do a bootstrap with -O2.
+# BOOT_CFLAGS is the value of CFLAGS to pass
+# to the stage2 and stage3 compilations
+# XCFLAGS is used for most compilations but not when using the GCC just built.
+XCFLAGS =
+CFLAGS = -g
+BOOT_CFLAGS = -O $(CFLAGS)
+# These exists to be overridden by the x-* and t-* files, respectively.
+X_CFLAGS =
+T_CFLAGS =
+
+X_CPPFLAGS =
+T_CPPFLAGS =
+
+X_ADA_CFLAGS =
+T_ADA_CFLAGS =
+
+X_ADAFLAGS =
+T_ADAFLAGS =
+
+CC = cc
+BISON = bison
+BISONFLAGS =
+ECHO = echo
+LEX = flex
+LEXFLAGS =
+CHMOD = chmod
+LN = ln
+LN_S = ln -s
+CP = cp -p
+MV = mv -f
+RM = rm -f
+RMDIR = rm -rf
+MKDIR = mkdir -p
+AR = ar
+AR_FLAGS = rc
+LS = ls
+RANLIB = @RANLIB@
+RANLIB_FLAGS = @ranlib_flags@
+
+SHELL = @SHELL@
+PWD_COMMAND = $${PWDCMD-pwd}
+# How to copy preserving the date
+INSTALL_DATA_DATE = cp -p
+MAKEINFO = makeinfo
+TEXI2DVI = texi2dvi
+TEXI2PDF = texi2pdf
+GNATBIND_FLAGS = -static -x
+ADA_CFLAGS =
+ADAFLAGS = -W -Wall -gnatpg -gnata
+SOME_ADAFLAGS =-gnata
+FORCE_DEBUG_ADAFLAGS = -g
+GNATLIBFLAGS = -gnatpg -nostdinc
+GNATLIBCFLAGS = -g -O2
+GNATLIBCFLAGS_FOR_C = $(GNATLIBCFLAGS) $(TARGET_LIBGCC2_CFLAGS) -fexceptions \
+	-DIN_RTS
+ALL_ADA_CFLAGS = $(X_ADA_CFLAGS) $(T_ADA_CFLAGS) $(ADA_CFLAGS)
+ALL_ADAFLAGS = $(CFLAGS) $(ALL_ADA_CFLAGS) $(X_ADAFLAGS) $(T_ADAFLAGS) \
+	$(ADAFLAGS)
+MOST_ADAFLAGS = $(CFLAGS) $(ALL_ADA_CFLAGS) $(X_ADAFLAGS) $(T_ADAFLAGS) \
+	$(SOME_ADAFLAGS)
+THREAD_KIND = native
+THREADSLIB =
+GMEM_LIB =
+MISCLIB =
+SYMDEPS = $(LIBINTL_DEP)
+OUTPUT_OPTION = @OUTPUT_OPTION@
+
+objext = .o
+exeext =
+arext  = .a
+soext  = .so
+shext  =
+hyphen = -
+
+# Define this as & to perform parallel make on a Sequent.
+# Note that this has some bugs, and it seems currently necessary
+# to compile all the gen* files first by hand to avoid erroneous results.
+P =
+
+# This is used instead of ALL_CFLAGS when compiling with GCC_FOR_TARGET.
+# It omits XCFLAGS, and specifies -B./.
+# It also specifies -B$(tooldir)/ to find as and ld for a cross compiler.
+GCC_CFLAGS = $(INTERNAL_CFLAGS) $(X_CFLAGS) $(T_CFLAGS) $(CFLAGS)
+
+# Tools to use when building a cross-compiler.
+# These are used because `configure' appends `cross-make'
+# to the makefile when making a cross-compiler.
+
+# We don't use cross-make.  Instead we use the tools from the build tree,
+# if they are available.
+# program_transform_name and objdir are set by configure.in.
+program_transform_name =
+objdir = .
+
+target_alias=@target_alias@
+target=@target@
+xmake_file = @xmake_file@
+tmake_file = @tmake_file@
+host_canonical=@host@
+#version=`sed -e 's/.*\"\([^ \"]*\)[ \"].*/\1/' < $(srcdir)/version.c`
+#mainversion=`sed -e 's/.*\"\([0-9]*\.[0-9]*\).*/\1/' < $(srcdir)/version.c`
+
+# Directory where sources are, from where we are.
+VPATH = $(srcdir)
+
+fsrcdir := $(shell cd $(srcdir);${PWD_COMMAND})
+fsrcpfx := $(shell cd $(srcdir);${PWD_COMMAND})/
+fcurdir := $(shell ${PWD_COMMAND})
+fcurpfx := $(shell ${PWD_COMMAND})/
+
+# Top build directory, relative to here.
+top_builddir = ../..
+
+# Internationalization library.
+LIBINTL = @LIBINTL@
+LIBINTL_DEP = @LIBINTL_DEP@
+
+# Any system libraries needed just for GNAT.
+SYSLIBS = @GNAT_LIBEXC@
+
+# List of extra object files linked in with various programs.
+EXTRA_GNATTOOLS_OBJS = ../../prefix.o ../../version.o
+
+# List of target dependent sources, overridden below as necessary
+TARGET_ADA_SRCS =
+
+# Type of tools build we are doing; default is not compiling tools.
+TOOLSCASE =
+
+# End of variables for you to override.
+
+all: all.indirect
+
+# This tells GNU Make version 3 not to put all variables in the environment.
+.NOEXPORT:
+
+# tmake_file and xmake_file expand to lists with entries of the form
+# $(srcdir)/config/...  but here $(srcdir) is the ada subdirectory so we
+# need to adjust the paths.  There can't be spaces in the subst arguments
+# or we get spurious spaces in the actual list of files to include.
+
+# target overrides
+ifneq ($(tmake_file),)
+include $(subst /config,/../config,$(tmake_file))
+endif
+
+# host overrides
+ifneq ($(xmake_file),)
+include $(subst /config,/../config,$(xmake_file))
+endif
+
+# Now figure out from those variables how to compile and link.
+
+all.indirect: Makefile ../gnat1$(exeext)
+
+# IN_GCC distinguishes between code compiled into GCC itself and other
+# programs built during a bootstrap.
+# autoconf inserts -DCROSS_DIRECTORY_STRUCTURE if we are building a cross
+# compiler which does not use the native libraries and headers.
+INTERNAL_CFLAGS = @CROSS@ -DIN_GCC
+
+# This is the variable actually used when we compile.
+LOOSE_CFLAGS = `echo $(CFLAGS) $(WARN2_CFLAGS)|sed -e 's/-pedantic//g' -e 's/-Wtraditional//g'`
+ALL_CFLAGS = $(INTERNAL_CFLAGS) $(X_CFLAGS) $(T_CFLAGS) $(LOOSE_CFLAGS) \
+	$(XCFLAGS)
+
+# Likewise.
+ALL_CPPFLAGS = $(CPPFLAGS) $(X_CPPFLAGS) $(T_CPPFLAGS)
+
+# This is where we get libiberty.a from.
+LIBIBERTY = ../../libiberty/libiberty.a
+
+# How to link with both our special library facilities
+# and the system's installed libraries.
+LIBS = $(LIBINTL) $(LIBIBERTY) $(SYSLIBS)
+LIBDEPS = $(LIBINTL_DEP) $(LIBIBERTY)
+# Default is no TGT_LIB; one might be passed down or something
+TGT_LIB =
+TOOLS_LIBS = $(EXTRA_GNATTOOLS_OBJS) targext.o link.o $(LIBGNAT) ../../../libiberty/libiberty.a $(SYSLIBS) $(TGT_LIB)
+
+# Specify the directories to be searched for header files.
+# Both . and srcdir are used, in that order,
+# so that tm.h and config.h will be found in the compilation
+# subdirectory rather than in the source directory.
+INCLUDES = -I- -I. -I.. -I$(srcdir) -I$(srcdir)/.. -I$(srcdir)/../config \
+	-I$(srcdir)/../../include
+
+ADA_INCLUDES = -I- -I. -I$(srcdir)
+
+INCLUDES_FOR_SUBDIR = -I. -I.. -I../.. -I$(fsrcdir) -I$(fsrcdir)/../config \
+	-I$(fsrcdir)/../../include -I$(fsrcdir)/..
+ADA_INCLUDES_FOR_SUBDIR = -I. -I$(fsrcdir) -I$(fsrcdir)/gcc
+
+# Avoid a lot of time thinking about remaking Makefile.in and *.def.
+.SUFFIXES: .in .def
+
+# Say how to compile Ada programs.
+.SUFFIXES: .ada .adb .ads .asm
+
+# Always use -I$(srcdir)/config when compiling.
+.asm.o:
+	$(CC) -c -x assembler $< $(OUTPUT_OPTION)
+
+.c.o:
+	$(CC) -c $(ALL_CFLAGS) $(ADA_CFLAGS) $(ALL_CPPFLAGS) $(INCLUDES) $< \
+	  $(OUTPUT_OPTION)
+
+.adb.o:
+	$(CC) -c $(ALL_ADAFLAGS) $(ADA_INCLUDES) $< $(OUTPUT_OPTION)
+
+.ads.o:
+	$(CC) -c $(ALL_ADAFLAGS) $(ADA_INCLUDES) $< $(OUTPUT_OPTION)
+
+# how to regenerate this file
+Makefile: ../config.status $(srcdir)/gcc-interface/Makefile.in $(srcdir)/Makefile.in $(srcdir)/../version.c
+	cd ..; \
+	LANGUAGES="$(CONFIG_LANGUAGES)" \
+	CONFIG_HEADERS= \
+	CONFIG_FILES="ada/gcc-interface/Makefile ada/Makefile" $(SHELL) config.status
+
+# This tells GNU make version 3 not to export all the variables
+# defined in this file into the environment.
+.NOEXPORT:
+
+# Lists of files for various purposes.
+
+GNATLINK_OBJS = gnatlink.o \
+ a-except.o ali.o alloc.o butil.o casing.o csets.o debug.o fmap.o fname.o \
+ gnatvsn.o hostparm.o indepsw.o interfac.o i-c.o i-cstrin.o namet.o opt.o \
+ osint.o output.o rident.o s-exctab.o s-secsta.o s-stalib.o s-stoele.o \
+ sdefault.o snames.o stylesw.o switch.o system.o table.o targparm.o tree_io.o \
+ types.o validsw.o widechar.o
+
+GNATMAKE_OBJS = a-except.o ali.o ali-util.o s-casuti.o \
+ alloc.o atree.o binderr.o butil.o casing.o csets.o debug.o elists.o einfo.o\
+ erroutc.o errutil.o err_vars.o fmap.o fname.o fname-uf.o fname-sf.o \
+ gnatmake.o gnatvsn.o hostparm.o interfac.o i-c.o i-cstrin.o krunch.o lib.o \
+ make.o makeusg.o makeutl.o mlib.o mlib-fil.o mlib-prj.o mlib-tgt.o \
+ mlib-tgt-specific.o mlib-utl.o namet.o nlists.o opt.o osint.o osint-m.o output.o \
+ prj.o prj-attr.o prj-attr-pm.o prj-com.o prj-dect.o prj-env.o prj-err.o prj-ext.o prj-nmsc.o \
+ prj-pars.o prj-part.o prj-proc.o prj-strt.o prj-tree.o prj-util.o \
+ rident.o s-exctab.o s-secsta.o s-stalib.o s-stoele.o \
+ scans.o scng.o sdefault.o sfn_scan.o s-purexc.o s-htable.o \
+ sinfo.o sinput.o sinput-c.o sinput-p.o \
+ snames.o stand.o stringt.o styleg.o stylesw.o system.o validsw.o switch.o switch-m.o \
+ table.o targparm.o tempdir.o tree_io.o types.o \
+ uintp.o uname.o urealp.o usage.o widechar.o \
+ $(EXTRA_GNATMAKE_OBJS)
+
+# Convert the target variable into a space separated list of architecture,
+# manufacturer, and operating system and assign each of those to its own
+# variable.
+
+host:=$(subst -, ,$(host_canonical))
+targ:=$(subst -, ,$(target))
+arch:=$(word 1,$(targ))
+ifeq ($(words $(targ)),2)
+  manu:=
+  osys:=$(word 2,$(targ))
+else
+  manu:=$(word 2,$(targ))
+  osys:=$(word 3,$(targ))
+endif
+
+# LIBGNAT_TARGET_PAIRS is a list of pairs of filenames.
+# The members of each pair must be separated by a '<' and no whitespace.
+# Each pair must be separated by some amount of whitespace from the following
+# pair.
+
+# Non-tasking case:
+
+LIBGNAT_TARGET_PAIRS = \
+a-intnam.ads<a-intnam-dummy.ads \
+s-inmaop.adb<s-inmaop-dummy.adb \
+s-intman.adb<s-intman-dummy.adb \
+s-osinte.ads<s-osinte-dummy.ads \
+s-osprim.adb<s-osprim-posix.adb \
+s-taprop.adb<s-taprop-dummy.adb \
+s-taspri.ads<s-taspri-dummy.ads
+
+# When using the GCC exception handling mechanism, we need to use an
+# alternate body for a-exexpr.adb (a-exexpr-gcc.adb)
+
+EH_MECHANISM=
+
+# Default shared object option. Note that we rely on the fact that the "soname"
+# option will always be present and last in this flag, so that we can have
+# $(SO_OPTS)libgnat-x.xx
+
+SO_OPTS = -Wl,-soname,
+
+# Default gnatlib-shared target.
+# By default, equivalent to gnatlib.
+# Set to gnatlib-shared-default, gnatlib-shared-dual, or a platform specific
+# target when supported.
+GNATLIB_SHARED = gnatlib
+
+# default value for gnatmake's target dependent file
+MLIB_TGT = mlib-tgt
+
+# By default, do not distribute prefix.o (in libgccprefix), since it is only
+# needed by external GNAT tools such as gnatdist and Glide.
+# Override this variable on native platforms when needed.
+PREFIX_OBJS =
+
+# To avoid duplicate code, use this variable to set PREFIX_OBJS when needed:
+PREFIX_REAL_OBJS = ../prefix.o \
+  ../../libiberty/concat.o     \
+  ../../libiberty/xmalloc.o    \
+  ../../libiberty/xstrdup.o    \
+  ../../libiberty/xexit.o
+
+LIB_VERSION = $(strip $(shell grep ' Library_Version :' $(fsrcpfx)gnatvsn.ads | sed -e 's/.*"\(.*\)".*/\1/'))
+
+# $(filter-out PATTERN...,TEXT) removes all PATTERN words from TEXT.
+# $(strip STRING) removes leading and trailing spaces from STRING.
+# If what's left is null then it's a match.
+
+ifeq ($(strip $(filter-out m68k% wrs vx%,$(targ))),)
+  LIBGNAT_TARGET_PAIRS = \
+  a-intnam.ads<a-intnam-vxworks.ads \
+  a-numaux.ads<a-numaux-vxworks.ads \
+  s-inmaop.adb<s-inmaop-posix.adb \
+  s-interr.adb<s-interr-vxworks.adb \
+  s-intman.ads<s-intman-vxworks.ads \
+  s-intman.adb<s-intman-vxworks.adb \
+  s-osinte.adb<s-osinte-vxworks.adb \
+  s-osinte.ads<s-osinte-vxworks.ads \
+  s-osprim.adb<s-osprim-vxworks.adb \
+  s-parame.ads<s-parame-vxworks.ads \
+  s-parame.adb<s-parame-vxworks.adb \
+  s-stchop.ads<s-stchop-limit.ads \
+  s-stchop.adb<s-stchop-vxworks.adb \
+  s-taprop.adb<s-taprop-vxworks.adb \
+  s-taspri.ads<s-taspri-vxworks.ads \
+  s-tpopsp.adb<s-tpopsp-vxworks.adb \
+  s-vxwork.ads<s-vxwork-m68k.ads \
+  g-soccon.ads<g-soccon-vxworks.ads \
+  g-socthi.ads<g-socthi-vxworks.ads \
+  g-socthi.adb<g-socthi-vxworks.adb \
+  g-stsifd.adb<g-stsifd-sockets.adb \
+  g-sttsne.adb<g-sttsne-vxworks.adb \
+  g-sttsne.ads<g-sttsne-locking.ads \
+  system.ads<system-vxworks-m68k.ads
+
+  TOOLS_TARGET_PAIRS=mlib-tgt-specific.adb<mlib-tgt-specific-vxworks.adb
+
+  EXTRA_GNATRTL_NONTASKING_OBJS=i-vxwork.o i-vxwoio.o
+  EXTRA_GNATRTL_TASKING_OBJS=s-vxwork.o
+
+  EXTRA_LIBGNAT_SRCS+=vx_stack_info.c
+  EXTRA_LIBGNAT_OBJS+=vx_stack_info.o
+
+  ifeq ($(strip $(filter-out yes,$(TRACE))),)
+    LIBGNAT_TARGET_PAIRS += \
+    s-traces.adb<s-traces-default.adb \
+    s-tratas.adb<s-tratas-default.adb \
+    s-trafor.adb<s-trafor-default.adb \
+    s-trafor.ads<s-trafor-default.ads \
+    s-tfsetr.adb<s-tfsetr-vxworks.adb
+  endif
+endif
+
+ifeq ($(strip $(filter-out powerpc% wrs vxworks,$(targ))),)
+  LIBGNAT_TARGET_PAIRS = \
+  a-intnam.ads<a-intnam-vxworks.ads \
+  a-numaux.ads<a-numaux-vxworks.ads \
+  s-inmaop.adb<s-inmaop-posix.adb \
+  s-intman.ads<s-intman-vxworks.ads \
+  s-intman.adb<s-intman-vxworks.adb \
+  s-osprim.adb<s-osprim-vxworks.adb \
+  s-parame.ads<s-parame-vxworks.ads \
+  s-parame.adb<s-parame-vxworks.adb \
+  s-stchop.ads<s-stchop-limit.ads \
+  s-stchop.adb<s-stchop-vxworks.adb \
+  s-taprop.adb<s-taprop-vxworks.adb \
+  s-taspri.ads<s-taspri-vxworks.ads \
+  s-vxwork.ads<s-vxwork-ppc.ads \
+  g-soccon.ads<g-soccon-vxworks.ads \
+  g-socthi.ads<g-socthi-vxworks.ads \
+  g-socthi.adb<g-socthi-vxworks.adb \
+  g-stsifd.adb<g-stsifd-sockets.adb \
+  g-sttsne.adb<g-sttsne-vxworks.adb \
+  g-sttsne.ads<g-sttsne-locking.ads
+
+  TOOLS_TARGET_PAIRS=mlib-tgt-specific.adb<mlib-tgt-specific-vxworks.adb
+
+  ifeq ($(strip $(filter-out yes,$(TRACE))),)
+    LIBGNAT_TARGET_PAIRS += \
+    s-traces.adb<s-traces-default.adb \
+    s-trafor.adb<s-trafor-default.adb \
+    s-trafor.ads<s-trafor-default.ads \
+    s-tratas.adb<s-tratas-default.adb \
+    s-tfsetr.adb<s-tfsetr-vxworks.adb
+  endif
+
+  ifeq ($(strip $(filter-out rtp,$(THREAD_KIND))),)
+    LIBGNAT_TARGET_PAIRS += \
+    s-osinte.adb<s-osinte-vxworks-rtp.adb \
+    s-osinte.ads<s-osinte-vxworks6.ads \
+    s-tpopsp.adb<s-tpopsp-vxworks-rtp.adb \
+    system.ads<system-vxworks-ppc-rtp.ads
+
+    EXTRA_GNATRTL_NONTASKING_OBJS=s-vxwexc.o
+  else
+    LIBGNAT_TARGET_PAIRS += \
+    s-interr.adb<s-interr-vxworks.adb \
+    s-tpopsp.adb<s-tpopsp-vxworks.adb \
+    system.ads<system-vxworks-ppc.ads
+
+    ifeq ($(strip $(filter-out kernel,$(THREAD_KIND))),)
+      LIBGNAT_TARGET_PAIRS += \
+      s-osinte.ads<s-osinte-vxworks6.ads \
+      s-osinte.adb<s-osinte-vxworks-kernel.adb
+    else
+      LIBGNAT_TARGET_PAIRS += \
+      s-osinte.ads<s-osinte-vxworks.ads \
+      s-osinte.adb<s-osinte-vxworks.adb
+    endif
+
+    EXTRA_GNATRTL_NONTASKING_OBJS=i-vxwork.o i-vxwoio.o s-vxwexc.o
+  endif
+
+  EXTRA_GNATRTL_TASKING_OBJS=s-vxwork.o
+
+  EXTRA_LIBGNAT_SRCS+=vx_stack_info.c
+  EXTRA_LIBGNAT_OBJS+=vx_stack_info.o
+endif
+
+# vxworksae / vxworks 653
+ifeq ($(strip $(filter-out powerpc% wrs vxworksae,$(targ))),)
+  # target pairs for kernel + vthreads runtime
+  LIBGNAT_TARGET_PAIRS = \
+  a-elchha.adb<a-elchha-vxworks-ppc-full.adb \
+  a-intnam.ads<a-intnam-vxworks.ads \
+  a-numaux.ads<a-numaux-vxworks.ads \
+  g-io.adb<g-io-vxworks-ppc-cert.adb \
+  g-io.ads<g-io-vxworks-ppc-cert.ads \
+  s-inmaop.adb<s-inmaop-posix.adb \
+  s-interr.adb<s-interr-vxworks.adb \
+  s-intman.ads<s-intman-vxworks.ads \
+  s-intman.adb<s-intman-vxworks.adb \
+  s-osinte.adb<s-osinte-vxworks.adb \
+  s-osinte.ads<s-osinte-vxworks.ads \
+  s-osprim.adb<s-osprim-vxworks.adb \
+  s-parame.ads<s-parame-ae653.ads \
+  s-parame.adb<s-parame-vxworks.adb \
+  s-taprop.adb<s-taprop-vxworks.adb \
+  s-taspri.ads<s-taspri-vxworks.ads \
+  s-tpopsp.adb<s-tpopsp-vxworks.adb \
+  s-vxwork.ads<s-vxwork-ppc.ads \
+  g-soccon.ads<g-soccon-vxworks.ads \
+  g-socthi.ads<g-socthi-vxworks.ads \
+  g-socthi.adb<g-socthi-vxworks.adb \
+  g-stsifd.adb<g-stsifd-sockets.adb \
+  g-sttsne.adb<g-sttsne-vxworks.adb \
+  g-sttsne.ads<g-sttsne-locking.ads \
+  system.ads<system-vxworks-ppc-vthread.ads
+
+  TOOLS_TARGET_PAIRS=mlib-tgt-specific.adb<mlib-tgt-specific-vxworks.adb
+
+  EXTRA_GNATRTL_NONTASKING_OBJS=i-vxwork.o i-vxwoio.o s-vxwexc.o
+  EXTRA_GNATRTL_TASKING_OBJS=s-vxwork.o
+
+  # Extra pairs for the vthreads runtime
+  ifeq ($(strip $(filter-out vthreads,$(THREAD_KIND))),)
+    LIBGNAT_TARGET_PAIRS += \
+    s-thread.adb<s-thread-ae653.adb
+    EXTRA_GNATRTL_NONTASKING_OBJS += s-thread.o
+  endif
+
+  ifeq ($(strip $(filter-out yes,$(TRACE))),)
+    LIBGNAT_TARGET_PAIRS += \
+    s-traces.adb<s-traces-default.adb \
+    s-trafor.adb<s-trafor-default.adb \
+    s-trafor.ads<s-trafor-default.ads \
+    s-tratas.adb<s-tratas-default.adb \
+    s-tfsetr.adb<s-tfsetr-vxworks.adb
+  endif
+endif
+
+ifeq ($(strip $(filter-out sparc% wrs vx%,$(targ))),)
+  LIBGNAT_TARGET_PAIRS = \
+  a-intnam.ads<a-intnam-vxworks.ads \
+  a-numaux.ads<a-numaux-vxworks.ads \
+  s-inmaop.adb<s-inmaop-posix.adb \
+  s-interr.adb<s-interr-vxworks.adb \
+  s-intman.ads<s-intman-vxworks.ads \
+  s-intman.adb<s-intman-vxworks.adb \
+  s-osinte.adb<s-osinte-vxworks.adb \
+  s-osinte.ads<s-osinte-vxworks.ads \
+  s-osprim.adb<s-osprim-vxworks.adb \
+  s-parame.ads<s-parame-vxworks.ads \
+  s-parame.adb<s-parame-vxworks.adb \
+  s-stchop.ads<s-stchop-limit.ads \
+  s-stchop.adb<s-stchop-vxworks.adb \
+  s-taprop.adb<s-taprop-vxworks.adb \
+  s-taspri.ads<s-taspri-vxworks.ads \
+  s-tpopsp.adb<s-tpopsp-vxworks.adb \
+  s-vxwork.ads<s-vxwork-sparcv9.ads \
+  g-soccon.ads<g-soccon-vxworks.ads \
+  g-socthi.ads<g-socthi-vxworks.ads \
+  g-socthi.adb<g-socthi-vxworks.adb \
+  g-stsifd.adb<g-stsifd-sockets.adb \
+  g-sttsne.adb<g-sttsne-vxworks.adb \
+  g-sttsne.ads<g-sttsne-locking.ads \
+  system.ads<system-vxworks-sparcv9.ads   \
+
+  TOOLS_TARGET_PAIRS=mlib-tgt-specific.adb<mlib-tgt-specific-vxworks.adb
+
+  EXTRA_GNATRTL_NONTASKING_OBJS=i-vxwork.o i-vxwoio.o
+  EXTRA_GNATRTL_TASKING_OBJS=s-vxwork.o
+
+  EXTRA_LIBGNAT_SRCS+=vx_stack_info.c
+  EXTRA_LIBGNAT_OBJS+=vx_stack_info.o
+endif
+
+ifeq ($(strip $(filter-out %86 wrs vxworks,$(targ))),)
+  LIBGNAT_TARGET_PAIRS = \
+  a-intnam.ads<a-intnam-vxworks.ads \
+  i-vxwork.ads<i-vxwork-x86.ads \
+  s-inmaop.adb<s-inmaop-posix.adb \
+  s-intman.ads<s-intman-vxworks.ads \
+  s-intman.adb<s-intman-vxworks.adb \
+  a-numaux.adb<a-numaux-x86.adb \
+  a-numaux.ads<a-numaux-x86.ads \
+  s-osprim.adb<s-osprim-vxworks.adb \
+  s-parame.ads<s-parame-vxworks.ads \
+  s-parame.adb<s-parame-vxworks.adb \
+  s-stchop.ads<s-stchop-limit.ads \
+  s-stchop.adb<s-stchop-vxworks.adb \
+  s-taprop.adb<s-taprop-vxworks.adb \
+  s-taspri.ads<s-taspri-vxworks.ads \
+  s-vxwork.ads<s-vxwork-x86.ads \
+  g-bytswa.adb<g-bytswa-x86.adb \
+  g-soccon.ads<g-soccon-vxworks.ads \
+  g-socthi.ads<g-socthi-vxworks.ads \
+  g-socthi.adb<g-socthi-vxworks.adb \
+  g-stsifd.adb<g-stsifd-sockets.adb \
+  g-sttsne.adb<g-sttsne-vxworks.adb \
+  g-sttsne.ads<g-sttsne-locking.ads
+
+  TOOLS_TARGET_PAIRS=mlib-tgt-specific.adb<mlib-tgt-specific-vxworks.adb
+
+  ifeq ($(strip $(filter-out yes,$(TRACE))),)
+    LIBGNAT_TARGET_PAIRS += \
+    s-traces.adb<s-traces-default.adb \
+    s-trafor.adb<s-trafor-default.adb \
+    s-trafor.ads<s-trafor-default.ads \
+    s-tratas.adb<s-tratas-default.adb \
+    s-tfsetr.adb<s-tfsetr-vxworks.adb
+  endif
+
+  ifeq ($(strip $(filter-out rtp,$(THREAD_KIND))),)
+    LIBGNAT_TARGET_PAIRS += \
+    s-osinte.adb<s-osinte-vxworks-rtp.adb \
+    s-osinte.ads<s-osinte-vxworks6.ads \
+    s-tpopsp.adb<s-tpopsp-vxworks-rtp.adb \
+    system.ads<system-vxworks-x86-rtp.ads
+
+    EXTRA_GNATRTL_NONTASKING_OBJS=s-vxwexc.o
+  else
+    LIBGNAT_TARGET_PAIRS += \
+    s-interr.adb<s-interr-vxworks.adb \
+    s-tpopsp.adb<s-tpopsp-vxworks.adb \
+    system.ads<system-vxworks-x86.ads
+
+    ifeq ($(strip $(filter-out kernel,$(THREAD_KIND))),)
+      LIBGNAT_TARGET_PAIRS += \
+      s-osinte.ads<s-osinte-vxworks6.ads \
+      s-osinte.adb<s-osinte-vxworks-kernel.adb
+    else
+      LIBGNAT_TARGET_PAIRS += \
+      s-osinte.ads<s-osinte-vxworks.ads \
+      s-osinte.adb<s-osinte-vxworks.adb
+    endif
+
+    EXTRA_GNATRTL_NONTASKING_OBJS=i-vxwork.o i-vxwoio.o s-vxwexc.o
+  endif
+
+  EXTRA_GNATRTL_TASKING_OBJS=s-vxwork.o
+
+  EXTRA_LIBGNAT_SRCS+=vx_stack_info.c
+  EXTRA_LIBGNAT_OBJS+=vx_stack_info.o
+endif
+
+ifeq ($(strip $(filter-out arm% coff wrs vx%,$(targ))),)
+  LIBGNAT_TARGET_PAIRS = \
+  a-intnam.ads<a-intnam-vxworks.ads \
+  a-numaux.ads<a-numaux-vxworks.ads \
+  s-inmaop.adb<s-inmaop-posix.adb \
+  s-interr.adb<s-interr-vxworks.adb \
+  s-intman.ads<s-intman-vxworks.ads \
+  s-intman.adb<s-intman-vxworks.adb \
+  s-osinte.adb<s-osinte-vxworks.adb \
+  s-osinte.ads<s-osinte-vxworks.ads \
+  s-osprim.adb<s-osprim-vxworks.adb \
+  s-parame.ads<s-parame-vxworks.ads \
+  s-parame.adb<s-parame-vxworks.adb \
+  s-stchop.ads<s-stchop-limit.ads \
+  s-stchop.adb<s-stchop-vxworks.adb \
+  s-taprop.adb<s-taprop-vxworks.adb \
+  s-taspri.ads<s-taspri-vxworks.ads \
+  s-tpopsp.adb<s-tpopsp-vxworks.adb \
+  s-vxwork.ads<s-vxwork-arm.ads \
+  g-soccon.ads<g-soccon-vxworks.ads \
+  g-socthi.ads<g-socthi-vxworks.ads \
+  g-socthi.adb<g-socthi-vxworks.adb \
+  g-stsifd.adb<g-stsifd-sockets.adb \
+  g-sttsne.adb<g-sttsne-vxworks.adb \
+  g-sttsne.ads<g-sttsne-locking.ads \
+  system.ads<system-vxworks-arm.ads
+
+  TOOLS_TARGET_PAIRS=mlib-tgt-specific.adb<mlib-tgt-specific-vxworks.adb
+
+  EXTRA_GNATRTL_NONTASKING_OBJS=i-vxwork.o i-vxwoio.o
+  EXTRA_GNATRTL_TASKING_OBJS=s-vxwork.o
+
+  EXTRA_LIBGNAT_SRCS+=vx_stack_info.c
+  EXTRA_LIBGNAT_OBJS+=vx_stack_info.o
+endif
+
+ifeq ($(strip $(filter-out mips% wrs vx%,$(targ))),)
+  LIBGNAT_TARGET_PAIRS = \
+  a-intnam.ads<a-intnam-vxworks.ads \
+  a-numaux.ads<a-numaux-vxworks.ads \
+  s-inmaop.adb<s-inmaop-posix.adb \
+  s-interr.adb<s-interr-vxworks.adb \
+  s-intman.ads<s-intman-vxworks.ads \
+  s-intman.adb<s-intman-vxworks.adb \
+  s-osinte.adb<s-osinte-vxworks.adb \
+  s-osinte.ads<s-osinte-vxworks.ads \
+  s-osprim.adb<s-osprim-vxworks.adb \
+  s-parame.ads<s-parame-vxworks.ads \
+  s-parame.adb<s-parame-vxworks.adb \
+  s-stchop.ads<s-stchop-limit.ads \
+  s-stchop.adb<s-stchop-vxworks.adb \
+  s-taprop.adb<s-taprop-vxworks.adb \
+  s-taspri.ads<s-taspri-vxworks.ads \
+  s-tpopsp.adb<s-tpopsp-vxworks.adb \
+  s-vxwork.ads<s-vxwork-mips.ads \
+  g-soccon.ads<g-soccon-vxworks.ads \
+  g-socthi.ads<g-socthi-vxworks.ads \
+  g-socthi.adb<g-socthi-vxworks.adb \
+  g-stsifd.adb<g-stsifd-sockets.adb \
+  g-sttsne.adb<g-sttsne-vxworks.adb \
+  g-sttsne.ads<g-sttsne-locking.ads \
+  system.ads<system-vxworks-mips.ads
+
+  TOOLS_TARGET_PAIRS=mlib-tgt-specific.adb<mlib-tgt-specific-vxworks.adb
+
+  EXTRA_GNATRTL_NONTASKING_OBJS=i-vxwork.o i-vxwoio.o
+  EXTRA_GNATRTL_TASKING_OBJS=s-vxwork.o
+
+  EXTRA_LIBGNAT_SRCS+=vx_stack_info.c
+  EXTRA_LIBGNAT_OBJS+=vx_stack_info.o
+endif
+
+ifeq ($(strip $(filter-out sparc% sun solaris%,$(targ))),)
+  LIBGNAT_TARGET_PAIRS_32 = \
+  a-intnam.ads<a-intnam-solaris.ads \
+  s-inmaop.adb<s-inmaop-posix.adb \
+  s-intman.adb<s-intman-solaris.adb \
+  s-osinte.adb<s-osinte-solaris.adb \
+  s-osinte.ads<s-osinte-solaris.ads \
+  s-osprim.adb<s-osprim-solaris.adb \
+  s-taprop.adb<s-taprop-solaris.adb \
+  s-tasinf.adb<s-tasinf-solaris.adb \
+  s-tasinf.ads<s-tasinf-solaris.ads \
+  s-taspri.ads<s-taspri-solaris.ads \
+  s-tpopsp.adb<s-tpopsp-solaris.adb \
+  g-soccon.ads<g-soccon-solaris.ads \
+  g-soliop.ads<g-soliop-solaris.ads \
+  system.ads<system-solaris-sparc.ads
+
+  LIBGNAT_TARGET_PAIRS_64 = \
+  a-intnam.ads<a-intnam-solaris.ads \
+  s-inmaop.adb<s-inmaop-posix.adb \
+  s-intman.adb<s-intman-solaris.adb \
+  s-osinte.adb<s-osinte-solaris.adb \
+  s-osinte.ads<s-osinte-solaris.ads \
+  s-osprim.adb<s-osprim-solaris.adb \
+  s-taprop.adb<s-taprop-solaris.adb \
+  s-tasinf.adb<s-tasinf-solaris.adb \
+  s-tasinf.ads<s-tasinf-solaris.ads \
+  s-taspri.ads<s-taspri-solaris.ads \
+  s-tpopsp.adb<s-tpopsp-solaris.adb \
+  g-soccon.ads<g-soccon-solaris-64.ads \
+  g-soliop.ads<g-soliop-solaris.ads \
+  system.ads<system-solaris-sparcv9.ads
+
+  ifeq ($(strip $(filter-out sparc sun solaris%,$(targ))),)
+    LIBGNAT_TARGET_PAIRS = $(LIBGNAT_TARGET_PAIRS_32)
+  else
+    LIBGNAT_TARGET_PAIRS = $(LIBGNAT_TARGET_PAIRS_64)
+  endif
+
+  TOOLS_TARGET_PAIRS=mlib-tgt-specific.adb<mlib-tgt-specific-solaris.adb
+
+  EH_MECHANISM=-gcc
+  THREADSLIB = -lposix4 -lthread
+  MISCLIB = -lposix4 -lnsl -lsocket
+  SO_OPTS = -Wl,-h,
+  GNATLIB_SHARED = gnatlib-shared-dual
+  GMEM_LIB = gmemlib
+  PREFIX_OBJS = $(PREFIX_REAL_OBJS)
+  LIBRARY_VERSION := $(LIB_VERSION)
+
+  ifeq ($(strip $(filter-out pthread PTHREAD,$(THREAD_KIND))),)
+    LIBGNAT_TARGET_PAIRS = \
+    a-intnam.ads<a-intnam-solaris.ads \
+    s-inmaop.adb<s-inmaop-posix.adb \
+    s-intman.adb<s-intman-posix.adb \
+    s-osinte.adb<s-osinte-posix.adb \
+    s-osinte.ads<s-osinte-solaris-posix.ads \
+    s-osprim.adb<s-osprim-solaris.adb \
+    s-taprop.adb<s-taprop-posix.adb \
+    s-taspri.ads<s-taspri-posix.ads \
+    s-tpopsp.adb<s-tpopsp-posix-foreign.adb \
+    g-soccon.ads<g-soccon-solaris.ads \
+    g-soliop.ads<g-soliop-solaris.ads \
+    system.ads<system-solaris-sparc.ads
+
+    THREADSLIB = -lposix4 -lpthread
+  endif
+
+  ifeq ($(strip $(filter-out m64,$(THREAD_KIND))),)
+    LIBGNAT_TARGET_PAIRS = $(LIBGNAT_TARGET_PAIRS_64)
+  endif
+endif
+
+ifeq ($(strip $(filter-out %86 solaris2%,$(arch) $(osys))),)
+  LIBGNAT_TARGET_PAIRS = \
+  a-numaux.adb<a-numaux-x86.adb \
+  a-numaux.ads<a-numaux-x86.ads \
+  a-intnam.ads<a-intnam-solaris.ads \
+  s-inmaop.adb<s-inmaop-posix.adb \
+  s-intman.adb<s-intman-solaris.adb \
+  s-osinte.adb<s-osinte-solaris.adb \
+  s-osinte.ads<s-osinte-solaris.ads \
+  s-osprim.adb<s-osprim-solaris.adb \
+  s-taprop.adb<s-taprop-solaris.adb \
+  s-tasinf.adb<s-tasinf-solaris.adb \
+  s-tasinf.ads<s-tasinf-solaris.ads \
+  s-taspri.ads<s-taspri-solaris.ads \
+  s-tpopsp.adb<s-tpopsp-solaris.adb \
+  g-bytswa.adb<g-bytswa-x86.adb \
+  g-soccon.ads<g-soccon-solaris.ads \
+  g-soliop.ads<g-soliop-solaris.ads \
+  system.ads<system-solaris-x86.ads
+
+  TOOLS_TARGET_PAIRS=mlib-tgt-specific.adb<mlib-tgt-specific-solaris.adb
+
+  EH_MECHANISM=-gcc
+  THREADSLIB = -lposix4 -lthread
+  MISCLIB = -lposix4 -lnsl -lsocket
+  SO_OPTS = -Wl,-h,
+  GNATLIB_SHARED = gnatlib-shared-dual
+  GMEM_LIB = gmemlib
+  PREFIX_OBJS = $(PREFIX_REAL_OBJS)
+  LIBRARY_VERSION := $(LIB_VERSION)
+endif
+
+ifeq ($(strip $(filter-out %86 linux%,$(arch) $(osys))),)
+  LIBGNAT_TARGET_PAIRS = \
+  a-intnam.ads<a-intnam-linux.ads \
+  a-numaux.adb<a-numaux-x86.adb \
+  a-numaux.ads<a-numaux-x86.ads \
+  g-bytswa.adb<g-bytswa-x86.adb \
+  s-inmaop.adb<s-inmaop-posix.adb \
+  s-intman.adb<s-intman-posix.adb \
+  s-osprim.adb<s-osprim-posix.adb \
+  s-taspri.ads<s-taspri-posix.ads \
+  s-tpopsp.adb<s-tpopsp-posix-foreign.adb \
+  g-sercom.adb<g-sercom-linux.adb \
+  system.ads<system-linux-x86.ads
+
+  ifeq ($(strip $(filter-out marte,$(THREAD_KIND))),)
+    LIBGNAT_TARGET_PAIRS += \
+    a-exetim.adb<a-exetim-linux-marte.adb \
+    a-exetim.ads<a-exetim-linux-marte.ads \
+    a-extiti.adb<a-extiti-linux-marte.adb \
+    a-extiti.ads<a-extiti-linux-marte.ads \
+    a-rttiev.adb<a-rttiev-linux-marte.adb \
+    a-rttiev.ads<a-rttiev-linux-marte.ads \
+    g-soccon.ads<g-soccon-linux-x86-marte.ads \
+    s-osinte.adb<s-osinte-linux-marte.adb \
+    s-osinte.ads<s-osinte-linux-marte.ads \
+    s-taprop.adb<s-taprop-linux-marte.adb
+
+    EXTRA_GNATRTL_TASKING_OBJS=a-exetim.o a-extiti.o
+
+    EH_MECHANISM=
+    THREADSLIB = -lmarte
+  else
+    LIBGNAT_TARGET_PAIRS += \
+    g-soccon.ads<g-soccon-linux-x86.ads \
+    s-linux.ads<s-linux.ads \
+    s-osinte.adb<s-osinte-posix.adb \
+    s-osinte.ads<s-osinte-linux.ads \
+    s-tasinf.ads<s-tasinf-linux.ads \
+    s-tasinf.adb<s-tasinf-linux.adb \
+    s-taprop.adb<s-taprop-linux.adb
+
+    EH_MECHANISM=-gcc
+    THREADSLIB = -lpthread
+    EXTRA_GNATRTL_TASKING_OBJS=s-linux.o
+  endif
+
+  TOOLS_TARGET_PAIRS =  \
+    mlib-tgt-specific.adb<mlib-tgt-specific-linux.adb \
+    indepsw.adb<indepsw-gnu.adb
+
+  GNATLIB_SHARED = gnatlib-shared-dual
+  GMEM_LIB = gmemlib
+  PREFIX_OBJS = $(PREFIX_REAL_OBJS)
+  LIBRARY_VERSION := $(LIB_VERSION)
+endif
+
+ifeq ($(strip $(filter-out %86 kfreebsd%,$(arch) $(osys))),)
+  LIBGNAT_TARGET_PAIRS = \
+  a-intnam.ads<a-intnam-freebsd.ads \
+  a-numaux.adb<a-numaux-x86.adb \
+  a-numaux.ads<a-numaux-x86.ads \
+  s-inmaop.adb<s-inmaop-posix.adb \
+  s-intman.adb<s-intman-posix.adb \
+  g-soccon.ads<g-soccon-freebsd.ads \
+  s-osinte.adb<s-osinte-posix.adb \
+  s-osinte.ads<s-osinte-kfreebsd-gnu.ads \
+  s-osprim.adb<s-osprim-posix.adb \
+  s-taprop.adb<s-taprop-linux.adb \
+  s-tasinf.ads<s-tasinf-linux.ads \
+  s-tasinf.adb<s-tasinf-linux.adb \
+  s-taspri.ads<s-taspri-posix.ads \
+  s-tpopsp.adb<s-tpopsp-posix-foreign.adb \
+  system.ads<system-freebsd-x86.ads
+
+  TOOLS_TARGET_PAIRS =  \
+    mlib-tgt-specific.adb<mlib-tgt-specific-linux.adb \
+    indepsw.adb<indepsw-gnu.adb
+
+  EH_MECHANISM=-gcc
+  THREADSLIB = -lpthread
+  GNATLIB_SHARED = gnatlib-shared-dual
+  GMEM_LIB = gmemlib
+  PREFIX_OBJS = $(PREFIX_REAL_OBJS)
+  LIBRARY_VERSION := $(LIB_VERSION)
+endif
+
+ifeq ($(strip $(filter-out %86 freebsd%,$(arch) $(osys))),)
+  LIBGNAT_TARGET_PAIRS = \
+  a-intnam.ads<a-intnam-freebsd.ads \
+  a-numaux.adb<a-numaux-x86.adb \
+  a-numaux.ads<a-numaux-x86.ads \
+  g-bytswa.adb<g-bytswa-x86.adb \
+  g-soccon.ads<g-soccon-freebsd.ads \
+  s-inmaop.adb<s-inmaop-posix.adb \
+  s-intman.adb<s-intman-posix.adb \
+  s-osinte.adb<s-osinte-freebsd.adb \
+  s-osinte.ads<s-osinte-freebsd.ads \
+  s-osprim.adb<s-osprim-posix.adb \
+  s-taprop.adb<s-taprop-posix.adb \
+  s-taspri.ads<s-taspri-posix.ads \
+  s-tpopsp.adb<s-tpopsp-posix.adb \
+  system.ads<system-freebsd-x86.ads
+
+  TOOLS_TARGET_PAIRS = \
+  mlib-tgt-specific.adb<mlib-tgt-specific-linux.adb
+  GNATLIB_SHARED = gnatlib-shared-dual
+
+  EH_MECHANISM=-gcc
+  THREADSLIB= -lpthread
+  GMEM_LIB = gmemlib
+  PREFIX_OBJS = $(PREFIX_REAL_OBJS)
+  LIBRARY_VERSION := $(LIB_VERSION)
+endif
+
+ifeq ($(strip $(filter-out s390% linux%,$(arch) $(osys))),)
+  ifeq ($(strip $(filter-out s390x,$(arch))),)
+    LIBGNAT_TARGET_PAIRS = \
+    a-intnam.ads<a-intnam-linux.ads \
+    s-inmaop.adb<s-inmaop-posix.adb \
+    s-intman.adb<s-intman-posix.adb \
+    s-linux.ads<s-linux.ads \
+    s-osinte.adb<s-osinte-posix.adb \
+    s-osinte.ads<s-osinte-linux.ads \
+    s-osprim.adb<s-osprim-posix.adb \
+    s-taprop.adb<s-taprop-linux.adb \
+    s-tasinf.ads<s-tasinf-linux.ads \
+    s-tasinf.adb<s-tasinf-linux.adb \
+    s-taspri.ads<s-taspri-posix-noaltstack.ads \
+    s-tpopsp.adb<s-tpopsp-posix-foreign.adb \
+    system.ads<system-linux-s390x.ads
+  else
+    LIBGNAT_TARGET_PAIRS = \
+    a-intnam.ads<a-intnam-linux.ads \
+    s-inmaop.adb<s-inmaop-posix.adb \
+    s-intman.adb<s-intman-posix.adb \
+    s-linux.ads<s-linux.ads \
+    s-osinte.adb<s-osinte-posix.adb \
+    s-osinte.ads<s-osinte-linux.ads \
+    s-osprim.adb<s-osprim-posix.adb \
+    s-taprop.adb<s-taprop-linux.adb \
+    s-tasinf.ads<s-tasinf-linux.ads \
+    s-tasinf.adb<s-tasinf-linux.adb \
+    s-taspri.ads<s-taspri-posix-noaltstack.ads \
+    s-tpopsp.adb<s-tpopsp-posix-foreign.adb \
+    system.ads<system-linux-s390.ads
+  endif
+
+  TOOLS_TARGET_PAIRS =  \
+    mlib-tgt-specific.adb<mlib-tgt-specific-linux.adb
+
+  EXTRA_GNATRTL_TASKING_OBJS=s-linux.o
+  EH_MECHANISM=-gcc
+  THREADSLIB = -lpthread
+  GNATLIB_SHARED = gnatlib-shared-dual
+  PREFIX_OBJS = $(PREFIX_REAL_OBJS)
+  LIBRARY_VERSION := $(LIB_VERSION)
+endif
+
+ifeq ($(strip $(filter-out mips sgi irix%,$(targ))),)
+  ifeq ($(strip $(filter-out mips sgi irix6%,$(targ))),)
+    LIBGNAT_TARGET_PAIRS = \
+    a-intnam.ads<a-intnam-irix.ads \
+    s-inmaop.adb<s-inmaop-posix.adb \
+    s-intman.adb<s-intman-irix.adb \
+    s-mastop.adb<s-mastop-irix.adb \
+    s-osinte.adb<s-osinte-irix.adb \
+    s-osinte.ads<s-osinte-irix.ads \
+    s-osprim.adb<s-osprim-posix.adb \
+    s-proinf.adb<s-proinf-irix-athread.adb \
+    s-proinf.ads<s-proinf-irix-athread.ads \
+    s-taprop.adb<s-taprop-irix.adb \
+    s-tasinf.ads<s-tasinf-irix.ads \
+    s-taspri.ads<s-taspri-posix.ads \
+    s-tpopsp.adb<s-tpopsp-posix.adb \
+    s-traceb.adb<s-traceb-mastop.adb \
+    g-soccon.ads<g-soccon-irix.ads \
+    system.ads<system-irix-n32.ads
+
+    THREADSLIB = -lpthread
+    GNATLIB_SHARED = gnatlib-shared-default
+
+  else
+    LIBGNAT_TARGET_PAIRS += \
+    s-mastop.adb<s-mastop-irix.adb \
+    s-osprim.adb<s-osprim-posix.adb \
+    s-traceb.adb<s-traceb-mastop.adb \
+    g-soccon.ads<g-soccon-irix.ads \
+    system.ads<system-irix-o32.ads
+  endif
+
+  EH_MECHANISM=-gcc
+  TOOLS_TARGET_PAIRS = mlib-tgt-specific.adb<mlib-tgt-specific-irix.adb
+  TGT_LIB = -lexc
+  MISCLIB = -lexc
+  PREFIX_OBJS = $(PREFIX_REAL_OBJS)
+  LIBRARY_VERSION := $(LIB_VERSION)
+  GMEM_LIB = gmemlib
+endif
+
+ifeq ($(strip $(filter-out hppa% hp hpux10%,$(targ))),)
+  LIBGNAT_TARGET_PAIRS = \
+  a-excpol.adb<a-excpol-abort.adb \
+  a-intnam.ads<a-intnam-hpux.ads \
+  s-inmaop.adb<s-inmaop-posix.adb \
+  s-interr.adb<s-interr-sigaction.adb \
+  s-intman.adb<s-intman-posix.adb \
+  s-osinte.adb<s-osinte-hpux-dce.adb \
+  s-osinte.ads<s-osinte-hpux-dce.ads \
+  s-parame.ads<s-parame-hpux.ads \
+  s-osprim.adb<s-osprim-posix.adb \
+  s-taprop.adb<s-taprop-hpux-dce.adb \
+  s-taspri.ads<s-taspri-hpux-dce.ads \
+  s-tpopsp.adb<s-tpopsp-posix.adb \
+  g-soccon.ads<g-soccon-hpux.ads \
+  system.ads<system-hpux.ads
+
+  EH_MECHANISM=-gcc
+  PREFIX_OBJS = $(PREFIX_REAL_OBJS)
+endif
+
+ifeq ($(strip $(filter-out hppa% hp hpux11%,$(targ))),)
+  LIBGNAT_TARGET_PAIRS = \
+  a-intnam.ads<a-intnam-hpux.ads \
+  s-inmaop.adb<s-inmaop-posix.adb \
+  s-intman.adb<s-intman-posix.adb \
+  s-osinte.adb<s-osinte-posix.adb \
+  s-osinte.ads<s-osinte-hpux.ads \
+  s-parame.ads<s-parame-hpux.ads \
+  s-osprim.adb<s-osprim-posix.adb \
+  s-traceb.adb<s-traceb-hpux.adb \
+  s-taprop.adb<s-taprop-posix.adb \
+  s-taspri.ads<s-taspri-posix.ads \
+  s-tpopsp.adb<s-tpopsp-posix-foreign.adb \
+  g-soccon.ads<g-soccon-hpux.ads \
+  system.ads<system-hpux.ads
+
+  TOOLS_TARGET_PAIRS = mlib-tgt-specific.adb<mlib-tgt-specific-hpux.adb
+  EH_MECHANISM=-gcc
+  TGT_LIB = /usr/lib/libcl.a
+  THREADSLIB = -lpthread
+  GMEM_LIB = gmemlib
+  soext = .sl
+  SO_OPTS = -Wl,+h,
+  PREFIX_OBJS = $(PREFIX_REAL_OBJS)
+  GNATLIB_SHARED = gnatlib-shared-dual
+  LIBRARY_VERSION := $(LIB_VERSION)
+endif
+
+ifeq ($(strip $(filter-out ibm aix%,$(manu) $(osys))),)
+  LIBGNAT_TARGET_PAIRS = \
+  a-intnam.ads<a-intnam-aix.ads \
+  s-inmaop.adb<s-inmaop-posix.adb \
+  s-intman.adb<s-intman-posix.adb \
+  s-osinte.adb<s-osinte-aix.adb \
+  s-osinte.ads<s-osinte-aix.ads \
+  s-osprim.adb<s-osprim-posix.adb \
+  s-taprop.adb<s-taprop-posix.adb \
+  s-taspri.ads<s-taspri-posix.ads \
+  s-tpopsp.adb<s-tpopsp-posix.adb \
+  g-soccon.ads<g-soccon-aix.ads \
+  system.ads<system-aix.ads
+
+  THREADSLIB = -lpthreads
+  PREFIX_OBJS=$(PREFIX_REAL_OBJS)
+
+  TOOLS_TARGET_PAIRS = \
+  mlib-tgt-specific.adb<mlib-tgt-specific-aix.adb \
+  indepsw.adb<indepsw-aix.adb
+
+  GMEM_LIB = gmemlib
+endif
+
+ifeq ($(strip $(filter-out lynxos,$(osys))),)
+  TOOLS_TARGET_PAIRS = \
+  mlib-tgt-specific.adb<mlib-tgt-specific-lynxos.adb \
+  indepsw.adb<indepsw-gnu.adb
+
+  ifeq ($(strip $(filter-out %86 lynxos,$(arch) $(osys))),)
+    LIBGNAT_TARGET_PAIRS = \
+    a-numaux.adb<a-numaux-x86.adb \
+    a-numaux.ads<a-numaux-x86.ads \
+    a-intnam.ads<a-intnam-lynxos.ads \
+    g-bytswa.adb<g-bytswa-x86.adb \
+    g-soccon.ads<g-soccon-lynxos.ads \
+    g-sttsne.adb<g-sttsne-locking.adb \
+    g-sttsne.ads<g-sttsne-locking.ads \
+    s-inmaop.adb<s-inmaop-posix.adb \
+    s-intman.adb<s-intman-posix.adb \
+    s-osinte.adb<s-osinte-lynxos.adb \
+    s-osinte.ads<s-osinte-lynxos.ads \
+    s-osprim.adb<s-osprim-posix.adb \
+    s-taprop.adb<s-taprop-lynxos.adb \
+    s-taspri.ads<s-taspri-lynxos.ads \
+    s-tpopsp.adb<s-tpopsp-lynxos.adb \
+    system.ads<system-lynxos-x86.ads
+
+    PREFIX_OBJS=$(PREFIX_REAL_OBJS)
+
+  else
+    LIBGNAT_TARGET_PAIRS = \
+    a-intnam.ads<a-intnam-lynxos.ads \
+    g-soccon.ads<g-soccon-lynxos.ads \
+    g-sttsne.adb<g-sttsne-locking.adb \
+    g-sttsne.ads<g-sttsne-locking.ads \
+    s-inmaop.adb<s-inmaop-posix.adb \
+    s-intman.adb<s-intman-posix.adb \
+    s-osinte.adb<s-osinte-lynxos.adb \
+    s-osinte.ads<s-osinte-lynxos.ads \
+    s-osprim.adb<s-osprim-posix.adb \
+    s-taprop.adb<s-taprop-lynxos.adb \
+    s-taspri.ads<s-taspri-lynxos.ads \
+    s-tpopsp.adb<s-tpopsp-lynxos.adb \
+    system.ads<system-lynxos-ppc.ads
+  endif
+endif
+
+ifeq ($(strip $(filter-out rtems%,$(osys))),)
+  LIBGNAT_TARGET_PAIRS = \
+  system.ads<system-rtems.ads \
+  a-intnam.ads<a-intnam-rtems.ads \
+  s-inmaop.adb<s-inmaop-posix.adb \
+  s-intman.adb<s-intman-posix.adb \
+  s-osinte.adb<s-osinte-rtems.adb \
+  s-osinte.ads<s-osinte-rtems.ads \
+  s-osprim.adb<s-osprim-posix.adb \
+  s-parame.adb<s-parame-rtems.adb \
+  s-taprop.adb<s-taprop-posix.adb \
+  s-taspri.ads<s-taspri-posix.ads \
+  s-tpopsp.adb<s-tpopsp-rtems.adb \
+  g-soccon.ads<g-soccon-rtems.ads \
+  s-stchop.adb<s-stchop-rtems.adb
+endif
+
+ifeq ($(strip $(filter-out alpha% dec osf%,$(targ))),)
+  LIBGNAT_TARGET_PAIRS = \
+  a-intnam.ads<a-intnam-tru64.ads \
+  s-inmaop.adb<s-inmaop-posix.adb \
+  s-intman.adb<s-intman-posix.adb \
+  s-mastop.adb<s-mastop-tru64.adb \
+  s-osinte.adb<s-osinte-tru64.adb \
+  s-osinte.ads<s-osinte-tru64.ads \
+  s-osprim.adb<s-osprim-unix.adb \
+  s-taprop.adb<s-taprop-tru64.adb \
+  s-tasinf.ads<s-tasinf-tru64.ads \
+  s-taspri.ads<s-taspri-tru64.ads \
+  s-tpopsp.adb<s-tpopsp-posix-foreign.adb \
+  s-traceb.adb<s-traceb-mastop.adb \
+  g-soccon.ads<g-soccon-tru64.ads \
+  system.ads<system-tru64.ads
+
+  TOOLS_TARGET_PAIRS=mlib-tgt-specific.adb<mlib-tgt-specific-tru64.adb
+
+  EH_MECHANISM=-gcc
+  GMEM_LIB=gmemlib
+  THREADSLIB = -lpthread -lmach -lexc -lrt
+  PREFIX_OBJS = $(PREFIX_REAL_OBJS)
+  GNATLIB_SHARED = gnatlib-shared-default
+  LIBRARY_VERSION := $(LIB_VERSION)
+endif
+
+ifeq ($(strip $(filter-out alpha64 ia64 dec hp vms% openvms% alphavms%,$(host))),)
+
+soext  = .exe
+hyphen = _
+LN = cp -p
+LN_S = cp -p
+
+.SUFFIXES: .sym
+
+.o.sym:
+	@ gnu:[bin]vmssymvec $<
+endif
+
+ifeq ($(strip $(filter-out alpha64 ia64 dec hp vms% openvms% alphavms%,$(targ))),)
+ifeq ($(strip $(filter-out ia64 hp vms% openvms%,$(targ))),)
+  LIBGNAT_TARGET_PAIRS_AUX1 = \
+  g-enblsp.adb<g-enblsp-vms-ia64.adb \
+  g-trasym.adb<g-trasym-vms-ia64.adb \
+  s-asthan.adb<s-asthan-vms-ia64.adb \
+  s-osinte.adb<s-osinte-vms-ia64.adb \
+  s-osinte.ads<s-osinte-vms-ia64.ads \
+  s-vaflop.adb<s-vaflop-vms-ia64.adb \
+  system.ads<system-vms-ia64.ads
+
+  LIBGNAT_TARGET_PAIRS_AUX2 = \
+  s-parame.ads<s-parame-vms-ia64.ads
+else
+ifeq ($(strip $(filter-out alpha64 dec vms% openvms% alphavms%,$(targ))),)
+  LIBGNAT_TARGET_PAIRS_AUX1 = \
+  g-enblsp.adb<g-enblsp-vms-alpha.adb \
+  g-trasym.adb<g-trasym-vms-alpha.adb \
+  s-traent.adb<s-traent-vms.adb \
+  s-traent.ads<s-traent-vms.ads \
+  s-asthan.adb<s-asthan-vms-alpha.adb \
+  s-osinte.adb<s-osinte-vms.adb \
+  s-osinte.ads<s-osinte-vms.ads \
+  s-vaflop.adb<s-vaflop-vms-alpha.adb \
+  system.ads<system-vms_64.ads
+
+ifeq ($(strip $(filter-out express EXPRESS,$(THREAD_KIND))),)
+  LIBGNAT_TARGET_PAIRS_AUX2 = \
+  s-parame.ads<s-parame-vms-restrict.ads
+else
+  LIBGNAT_TARGET_PAIRS_AUX2 = \
+  s-parame.ads<s-parame-vms-alpha.ads
+endif
+endif
+endif
+
+  LIBGNAT_TARGET_PAIRS = \
+  a-caldel.adb<a-caldel-vms.adb \
+  a-calend.adb<a-calend-vms.adb \
+  a-calend.ads<a-calend-vms.ads \
+  a-dirval.adb<a-dirval-vms.adb \
+  a-excpol.adb<a-excpol-abort.adb \
+  a-intnam.ads<a-intnam-vms.ads \
+  a-numaux.ads<a-numaux-vms.ads \
+  g-expect.adb<g-expect-vms.adb \
+  g-soccon.ads<g-soccon-vms.ads \
+  g-socthi.ads<g-socthi-vms.ads \
+  g-socthi.adb<g-socthi-vms.adb \
+  g-stsifd.adb<g-stsifd-sockets.adb \
+  g-sttsne.adb<g-sttsne-locking.adb \
+  g-sttsne.ads<g-sttsne-locking.ads \
+  i-c.ads<i-c-vms_64.ads \
+  i-cstrin.ads<i-cstrin-vms_64.ads \
+  i-cstrin.adb<i-cstrin-vms_64.adb \
+  i-cpoint.ads<i-cpoint-vms_64.ads \
+  i-cpoint.adb<i-cpoint-vms_64.adb \
+  i-cstrea.adb<i-cstrea-vms.adb \
+  memtrack.adb<memtrack-vms_64.adb \
+  s-auxdec.ads<s-auxdec-vms_64.ads \
+  s-crtl.ads<s-crtl-vms_64.ads \
+  s-inmaop.adb<s-inmaop-vms.adb \
+  s-interr.adb<s-interr-vms.adb \
+  s-intman.adb<s-intman-vms.adb \
+  s-intman.ads<s-intman-vms.ads \
+  s-memory.adb<s-memory-vms_64.adb \
+  s-memory.ads<s-memory-vms_64.ads \
+  s-osprim.adb<s-osprim-vms.adb \
+  s-osprim.ads<s-osprim-vms.ads \
+  s-taprop.adb<s-taprop-vms.adb \
+  s-taspri.ads<s-taspri-vms.ads \
+  s-tpopsp.adb<s-tpopsp-posix-foreign.adb \
+  s-tpopde.adb<s-tpopde-vms.adb \
+  s-tpopde.ads<s-tpopde-vms.ads \
+  $(LIBGNAT_TARGET_PAIRS_AUX1) \
+  $(LIBGNAT_TARGET_PAIRS_AUX2)
+
+ifeq ($(strip $(filter-out ia64 hp vms% openvms%,$(targ))),)
+  TOOLS_TARGET_PAIRS= \
+  mlib-tgt-specific.adb<mlib-tgt-specific-vms-ia64.adb \
+  symbols.adb<symbols-vms.adb \
+  symbols-processing.adb<symbols-processing-vms-ia64.adb
+else
+  TOOLS_TARGET_PAIRS= \
+  mlib-tgt-specific.adb<mlib-tgt-specific-vms-alpha.adb \
+  symbols.adb<symbols-vms.adb \
+  symbols-processing.adb<symbols-processing-vms-alpha.adb
+endif
+
+adamsg.o: adamsg.msg
+	-$(DECC) --cc=message adamsg.msg -o adamsg.o
+
+  EXTRA_GNATMAKE_OBJS = mlib-tgt-vms_common.o
+
+  GMEM_LIB = gmemlib
+  EH_MECHANISM=-gcc
+  GNATLIB_SHARED=gnatlib-shared-vms
+ifeq ($(strip $(filter-out alpha64 dec vms% openvms% alphavms%,$(targ))),)
+  EXTRA_LIBGNAT_SRCS=vmshandler.asm
+  EXTRA_LIBGNAT_OBJS=vmshandler.o
+endif
+  EXTRA_LIBGNAT_SRCS+=adamsg.msg
+  EXTRA_LIBGNAT_OBJS+=adamsg.o
+  EXTRA_GNATRTL_TASKING_OBJS=s-tpopde.o
+  EXTRA_GNATTOOLS = \
+     ../../gnatlbr$(exeext)  \
+     ../../gnatsym$(exeext)  \
+     ../../vms_help$(exeext) \
+     ../../gnat.hlp
+  # This command transforms (YYYYMMDD) into YY,MMDD
+  GSMATCH_VERSION := $(shell grep "^ *Gnat_Static_Version_String" $(fsrcpfx)gnatvsn.ads | sed -e 's/.*(\(.*\)).*/\1/' -e 's/\(..\)\(..\)\(....\).*/\2,\3/')
+  TOOLS_LIBS_LO := --for-linker=sys\\$$\$$library:trace.exe
+  LIBRARY_VERSION := $(subst .,_,$(LIB_VERSION))
+endif
+
+ifeq ($(strip $(filter-out cygwin32% mingw32% pe,$(osys))),)
+  LIBGNAT_TARGET_PAIRS = \
+  a-dirval.adb<a-dirval-mingw.adb \
+  a-excpol.adb<a-excpol-abort.adb \
+  a-numaux.adb<a-numaux-x86.adb \
+  a-numaux.ads<a-numaux-x86.ads \
+  s-gloloc.adb<s-gloloc-mingw.adb \
+  s-inmaop.adb<s-inmaop-dummy.adb \
+  s-memory.adb<s-memory-mingw.adb \
+  s-taspri.ads<s-taspri-mingw.ads \
+  s-tasinf.adb<s-tasinf-mingw.adb \
+  s-tasinf.ads<s-tasinf-mingw.ads \
+  g-bytswa.adb<g-bytswa-x86.adb \
+  g-socthi.ads<g-socthi-mingw.ads \
+  g-socthi.adb<g-socthi-mingw.adb \
+  g-stsifd.adb<g-stsifd-sockets.adb \
+  g-soccon.ads<g-soccon-mingw.ads \
+  g-soliop.ads<g-soliop-mingw.ads
+
+  ifeq ($(strip $(filter-out rtx_w32 rtx_rtss,$(THREAD_KIND))),)
+    LIBGNAT_TARGET_PAIRS += \
+    s-intman.adb<s-intman-dummy.adb \
+    s-osinte.ads<s-osinte-rtx.ads \
+    s-osprim.adb<s-osprim-rtx.adb \
+    s-taprop.adb<s-taprop-rtx.adb \
+    system.ads<system-rtx.ads
+
+    EXTRA_GNATRTL_NONTASKING_OBJS = s-win32.o
+
+    MISCLIB = -lwsock32 -lrtapi_w32
+    THREADSLIB=-lrtapi_w32
+  else
+    LIBGNAT_TARGET_PAIRS += \
+    a-exetim.adb<a-exetim-mingw.adb \
+    a-exetim.ads<a-exetim-mingw.ads \
+    a-intnam.ads<a-intnam-mingw.ads \
+    g-sercom.adb<g-sercom-mingw.adb \
+    s-interr.adb<s-interr-sigaction.adb \
+    s-intman.adb<s-intman-mingw.adb \
+    s-osinte.ads<s-osinte-mingw.ads \
+    s-osprim.adb<s-osprim-mingw.adb \
+    s-taprop.adb<s-taprop-mingw.adb \
+    system.ads<system-mingw.ads
+
+    EXTRA_GNATRTL_NONTASKING_OBJS = s-win32.o g-regist.o
+    EXTRA_GNATRTL_TASKING_OBJS = a-exetim.o
+
+    MISCLIB = -lwsock32
+
+    # ??? This will be replaced by gnatlib-shared-dual-win32 when GNAT
+    # auto-import support for array/record will be done.
+    GNATLIB_SHARED = gnatlib-shared-win32
+  endif
+
+  TOOLS_TARGET_PAIRS= \
+  mlib-tgt-specific.adb<mlib-tgt-specific-mingw.adb \
+  indepsw.adb<indepsw-mingw.adb
+
+  EH_MECHANISM=-gcc
+  GMEM_LIB = gmemlib
+  PREFIX_OBJS = $(PREFIX_REAL_OBJS)
+  EXTRA_GNATTOOLS = ../../gnatdll$(exeext)
+  EXTRA_GNATMAKE_OBJS = mdll.o mdll-utl.o mdll-fil.o
+  soext = .dll
+  LIBRARY_VERSION := $(LIB_VERSION)
+endif
+
+ifeq ($(strip $(filter-out mips linux%,$(arch) $(osys))),)
+  LIBGNAT_TARGET_PAIRS = \
+  a-intnam.ads<a-intnam-linux.ads \
+  g-soccon.ads<g-soccon-linux-mips.ads \
+  s-inmaop.adb<s-inmaop-posix.adb \
+  s-intman.adb<s-intman-posix.adb \
+  s-linux.ads<s-linux.ads \
+  s-osinte.adb<s-osinte-posix.adb \
+  s-osinte.ads<s-osinte-linux.ads \
+  s-osprim.adb<s-osprim-posix.adb \
+  s-taprop.adb<s-taprop-linux.adb \
+  s-tasinf.ads<s-tasinf-linux.ads \
+  s-tasinf.adb<s-tasinf-linux.adb \
+  s-taspri.ads<s-taspri-posix.ads \
+  s-tpopsp.adb<s-tpopsp-posix-foreign.adb \
+  system.ads<system-linux-mips.ads
+
+  EH_MECHANISM=-gcc
+  THREADSLIB = -lpthread
+  GNATLIB_SHARED = gnatlib-shared-dual
+  GMEM_LIB = gmemlib
+  PREFIX_OBJS = $(PREFIX_REAL_OBJS)
+  LIBRARY_VERSION := $(LIB_VERSION)
+endif
+
+ifeq ($(strip $(filter-out mipsel linux%,$(arch) $(osys))),)
+  LIBGNAT_TARGET_PAIRS = \
+  a-intnam.ads<a-intnam-linux.ads \
+  g-soccon.ads<g-soccon-linux-mips.ads \
+  s-inmaop.adb<s-inmaop-posix.adb \
+  s-intman.adb<s-intman-posix.adb \
+  s-linux.ads<s-linux.ads \
+  s-osinte.adb<s-osinte-posix.adb \
+  s-osinte.ads<s-osinte-linux.ads \
+  s-osprim.adb<s-osprim-posix.adb \
+  s-taprop.adb<s-taprop-linux.adb \
+  s-tasinf.ads<s-tasinf-linux.ads \
+  s-tasinf.adb<s-tasinf-linux.adb \
+  s-taspri.ads<s-taspri-posix.ads \
+  s-tpopsp.adb<s-tpopsp-posix-foreign.adb \
+  system.ads<system-linux-mipsel.ads
+
+  EH_MECHANISM=-gcc
+  THREADSLIB = -lpthread
+  GNATLIB_SHARED = gnatlib-shared-dual
+  GMEM_LIB = gmemlib
+  PREFIX_OBJS = $(PREFIX_REAL_OBJS)
+  LIBRARY_VERSION := $(LIB_VERSION)
+endif
+
+ifeq ($(strip $(filter-out powerpc% linux%,$(arch) $(osys))),)
+  LIBGNAT_TARGET_PAIRS = \
+  a-intnam.ads<a-intnam-linux.ads \
+  g-soccon.ads<g-soccon-linux-ppc.ads \
+  s-inmaop.adb<s-inmaop-posix.adb \
+  s-intman.adb<s-intman-posix.adb \
+  s-linux.ads<s-linux.ads \
+  s-osinte.adb<s-osinte-posix.adb \
+  s-osinte.ads<s-osinte-linux.ads \
+  s-osprim.adb<s-osprim-posix.adb \
+  s-taprop.adb<s-taprop-linux.adb \
+  s-tasinf.ads<s-tasinf-linux.ads \
+  s-tasinf.adb<s-tasinf-linux.adb \
+  s-taspri.ads<s-taspri-posix-noaltstack.ads \
+  s-tpopsp.adb<s-tpopsp-posix-foreign.adb \
+  g-sercom.adb<g-sercom-linux.adb \
+  system.ads<system-linux-ppc.ads
+
+  TOOLS_TARGET_PAIRS =  \
+    mlib-tgt-specific.adb<mlib-tgt-specific-linux.adb \
+    indepsw.adb<indepsw-gnu.adb
+
+  EXTRA_GNATRTL_TASKING_OBJS=s-linux.o
+  EH_MECHANISM=-gcc
+  THREADSLIB = -lpthread
+  GNATLIB_SHARED = gnatlib-shared-dual
+  GMEM_LIB = gmemlib
+  PREFIX_OBJS = $(PREFIX_REAL_OBJS)
+  LIBRARY_VERSION := $(LIB_VERSION)
+endif
+
+ifeq ($(strip $(filter-out sparc% linux%,$(arch) $(osys))),)
+  LIBGNAT_TARGET_PAIRS = \
+  a-intnam.ads<a-intnam-linux.ads \
+  s-inmaop.adb<s-inmaop-posix.adb \
+  s-intman.adb<s-intman-posix.adb \
+  s-linux.ads<s-linux.ads \
+  s-osinte.adb<s-osinte-posix.adb \
+  s-osinte.ads<s-osinte-linux.ads \
+  s-osprim.adb<s-osprim-posix.adb \
+  s-taprop.adb<s-taprop-linux.adb \
+  s-tasinf.ads<s-tasinf-linux.ads \
+  s-tasinf.adb<s-tasinf-linux.adb \
+  s-taspri.ads<s-taspri-posix-noaltstack.ads \
+  s-tpopsp.adb<s-tpopsp-posix-foreign.adb \
+  system.ads<system-linux-sparc.ads
+
+  TOOLS_TARGET_PAIRS =  \
+    mlib-tgt-specific.adb<mlib-tgt-specific-linux.adb \
+    indepsw.adb<indepsw-gnu.adb
+
+  EXTRA_GNATRTL_TASKING_OBJS=s-linux.o
+  EH_MECHANISM=-gcc
+  THREADSLIB = -lpthread
+  GNATLIB_SHARED = gnatlib-shared-dual
+  GMEM_LIB = gmemlib
+  PREFIX_OBJS = $(PREFIX_REAL_OBJS)
+  LIBRARY_VERSION := $(LIB_VERSION)
+endif
+
+ifeq ($(strip $(filter-out hppa% linux%,$(arch) $(osys))),)
+  LIBGNAT_TARGET_PAIRS = \
+  a-intnam.ads<a-intnam-linux.ads \
+  s-inmaop.adb<s-inmaop-posix.adb \
+  s-intman.adb<s-intman-posix.adb \
+  s-linux.ads<s-linux-hppa.ads \
+  s-osinte.adb<s-osinte-posix.adb \
+  s-osinte.ads<s-osinte-linux.ads \
+  s-osprim.adb<s-osprim-posix.adb \
+  s-taprop.adb<s-taprop-linux.adb \
+  s-tasinf.ads<s-tasinf-linux.ads \
+  s-tasinf.adb<s-tasinf-linux.adb \
+  s-taspri.ads<s-taspri-posix-noaltstack.ads \
+  s-tpopsp.adb<s-tpopsp-posix-foreign.adb \
+  system.ads<system-linux-hppa.ads
+
+  TOOLS_TARGET_PAIRS =  \
+    mlib-tgt-specific.adb<mlib-tgt-specific-linux.adb \
+    indepsw.adb<indepsw-gnu.adb
+
+  EXTRA_GNATRTL_TASKING_OBJS=s-linux.o
+  EH_MECHANISM=-gcc
+  THREADSLIB = -lpthread
+  GNATLIB_SHARED = gnatlib-shared-dual
+  GMEM_LIB = gmemlib
+  PREFIX_OBJS = $(PREFIX_REAL_OBJS)
+  LIBRARY_VERSION := $(LIB_VERSION)
+endif
+
+ifeq ($(strip $(filter-out sh4% linux%,$(arch) $(osys))),)
+  LIBGNAT_TARGET_PAIRS = \
+  a-intnam.ads<a-intnam-linux.ads \
+  s-inmaop.adb<s-inmaop-posix.adb \
+  s-intman.adb<s-intman-posix.adb \
+  s-linux.ads<s-linux.ads \
+  s-osinte.adb<s-osinte-posix.adb \
+  s-osinte.ads<s-osinte-linux.ads \
+  s-osprim.adb<s-osprim-posix.adb \
+  s-taprop.adb<s-taprop-linux.adb \
+  s-tasinf.ads<s-tasinf-linux.ads \
+  s-tasinf.adb<s-tasinf-linux.adb \
+  s-taspri.ads<s-taspri-posix-noaltstack.ads \
+  s-tpopsp.adb<s-tpopsp-posix-foreign.adb \
+  system.ads<system-linux-sh4.ads
+
+  TOOLS_TARGET_PAIRS =  \
+    mlib-tgt-specific.adb<mlib-tgt-specific-linux.adb \
+    indepsw.adb<indepsw-linux.adb
+
+  EXTRA_GNATRTL_TASKING_OBJS=s-linux.o
+  EH_MECHANISM=-gcc
+  MISCLIB=
+  THREADSLIB = -lpthread
+  GNATLIB_SHARED = gnatlib-shared-dual
+  GMEM_LIB = gmemlib
+  PREFIX_OBJS = $(PREFIX_REAL_OBJS)
+  LIBRARY_VERSION := $(LIB_VERSION)
+endif
+
+ifeq ($(strip $(filter-out %ia64 linux%,$(arch) $(osys))),)
+  LIBGNAT_TARGET_PAIRS = \
+  a-intnam.ads<a-intnam-linux.ads \
+  a-numaux.ads<a-numaux-libc-x86.ads \
+  g-soccon.ads<g-soccon-linux-64.ads \
+  s-inmaop.adb<s-inmaop-posix.adb \
+  s-intman.adb<s-intman-posix.adb \
+  s-linux.ads<s-linux.ads \
+  s-osinte.ads<s-osinte-linux.ads \
+  s-osinte.adb<s-osinte-posix.adb \
+  s-osprim.adb<s-osprim-posix.adb \
+  s-taprop.adb<s-taprop-linux.adb \
+  s-tasinf.ads<s-tasinf-linux.ads \
+  s-tasinf.adb<s-tasinf-linux.adb \
+  s-tpopsp.adb<s-tpopsp-posix-foreign.adb \
+  s-taspri.ads<s-taspri-posix-noaltstack.ads \
+  g-sercom.adb<g-sercom-linux.adb \
+  system.ads<system-linux-ia64.ads
+
+  TOOLS_TARGET_PAIRS =  \
+    mlib-tgt-specific.adb<mlib-tgt-specific-linux.adb \
+    indepsw.adb<indepsw-gnu.adb
+
+  EXTRA_GNATRTL_TASKING_OBJS=s-linux.o
+  EH_MECHANISM=-gcc
+  MISCLIB=
+  THREADSLIB=-lpthread
+  GNATLIB_SHARED=gnatlib-shared-dual
+  GMEM_LIB = gmemlib
+  PREFIX_OBJS=$(PREFIX_REAL_OBJS)
+  LIBRARY_VERSION := $(LIB_VERSION)
+endif
+
+ifeq ($(strip $(filter-out alpha% linux%,$(arch) $(osys))),)
+  LIBGNAT_TARGET_PAIRS = \
+  a-intnam.ads<a-intnam-linux.ads \
+  s-inmaop.adb<s-inmaop-posix.adb \
+  s-intman.adb<s-intman-posix.adb \
+  s-linux.ads<s-linux-alpha.ads \
+  s-osinte.ads<s-osinte-linux.ads \
+  s-osinte.adb<s-osinte-posix.adb \
+  s-osprim.adb<s-osprim-posix.adb \
+  s-taprop.adb<s-taprop-linux.adb \
+  s-tasinf.ads<s-tasinf-linux.ads \
+  s-tasinf.adb<s-tasinf-linux.adb \
+  s-tpopsp.adb<s-tpopsp-posix-foreign.adb \
+  s-taspri.ads<s-taspri-posix-noaltstack.ads \
+  system.ads<system-linux-alpha.ads
+
+  TOOLS_TARGET_PAIRS =  \
+    mlib-tgt-specific.adb<mlib-tgt-specific-linux.adb \
+    indepsw.adb<indepsw-gnu.adb
+
+  EXTRA_GNATRTL_TASKING_OBJS=s-linux.o
+  EH_MECHANISM=-gcc
+  MISCLIB=
+  THREADSLIB=-lpthread
+  GNATLIB_SHARED=gnatlib-shared-dual
+  PREFIX_OBJS=$(PREFIX_REAL_OBJS)
+  LIBRARY_VERSION := $(LIB_VERSION)
+endif
+
+ifeq ($(strip $(filter-out %x86_64 linux%,$(arch) $(osys))),)
+  LIBGNAT_TARGET_PAIRS = \
+  a-intnam.ads<a-intnam-linux.ads \
+  a-numaux.adb<a-numaux-x86.adb \
+  a-numaux.ads<a-numaux-x86.ads \
+  g-soccon.ads<g-soccon-linux-64.ads \
+  s-inmaop.adb<s-inmaop-posix.adb \
+  s-intman.adb<s-intman-posix.adb \
+  s-linux.ads<s-linux.ads \
+  s-osinte.ads<s-osinte-linux.ads \
+  s-osinte.adb<s-osinte-posix.adb \
+  s-osprim.adb<s-osprim-posix.adb \
+  s-taprop.adb<s-taprop-linux.adb \
+  s-tasinf.ads<s-tasinf-linux.ads \
+  s-tasinf.adb<s-tasinf-linux.adb \
+  s-tpopsp.adb<s-tpopsp-posix-foreign.adb \
+  s-taspri.ads<s-taspri-posix.ads \
+  g-sercom.adb<g-sercom-linux.adb \
+  system.ads<system-linux-x86_64.ads
+
+  TOOLS_TARGET_PAIRS =  \
+    mlib-tgt-specific.adb<mlib-tgt-specific-linux.adb \
+    indepsw.adb<indepsw-gnu.adb
+
+  EXTRA_GNATRTL_TASKING_OBJS=s-linux.o
+  EH_MECHANISM=-gcc
+  THREADSLIB=-lpthread
+  GNATLIB_SHARED=gnatlib-shared-dual
+  GMEM_LIB = gmemlib
+  PREFIX_OBJS=$(PREFIX_REAL_OBJS)
+  LIBRARY_VERSION := $(LIB_VERSION)
+endif
+
+ifeq ($(strip $(filter-out darwin%,$(osys))),)
+  ifeq ($(strip $(filter-out %86,$(arch))),)
+    LIBGNAT_TARGET_PAIRS = \
+    a-intnam.ads<a-intnam-darwin.ads \
+    s-inmaop.adb<s-inmaop-posix.adb \
+    s-intman.adb<s-intman-posix.adb \
+    s-osinte.adb<s-osinte-darwin.adb \
+    s-osinte.ads<s-osinte-darwin.ads \
+    s-osprim.adb<s-osprim-posix.adb \
+    s-taprop.adb<s-taprop-posix.adb \
+    s-taspri.ads<s-taspri-posix.ads \
+    s-tpopsp.adb<s-tpopsp-posix-foreign.adb \
+    g-soccon.ads<g-soccon-darwin.ads \
+    a-numaux.ads<a-numaux-x86.ads \
+    a-numaux.adb<a-numaux-x86.adb \
+    system.ads<system-darwin-x86.ads
+  else
+    LIBGNAT_TARGET_PAIRS = \
+    a-intnam.ads<a-intnam-darwin.ads \
+    s-inmaop.adb<s-inmaop-posix.adb \
+    s-intman.adb<s-intman-posix.adb \
+    s-osinte.adb<s-osinte-darwin.adb \
+    s-osinte.ads<s-osinte-darwin.ads \
+    s-osprim.adb<s-osprim-posix.adb \
+    s-taprop.adb<s-taprop-posix.adb \
+    s-taspri.ads<s-taspri-posix.ads \
+    s-tpopsp.adb<s-tpopsp-posix-foreign.adb \
+    g-soccon.ads<g-soccon-darwin.ads \
+    a-numaux.ads<a-numaux-darwin.ads \
+    a-numaux.adb<a-numaux-darwin.adb \
+    system.ads<system-darwin-ppc.ads
+  endif
+
+  TOOLS_TARGET_PAIRS =  \
+    mlib-tgt-specific.adb<mlib-tgt-specific-darwin.adb
+
+  EH_MECHANISM=-gcc
+  GNATLIB_SHARED = gnatlib-shared-darwin
+  SO_OPTS = -Wl,-flat_namespace -shared-libgcc
+  RANLIB = ranlib -c
+  GMEM_LIB = gmemlib
+  PREFIX_OBJS=$(PREFIX_REAL_OBJS)
+  LIBRARY_VERSION := $(LIB_VERSION)
+  soext = .dylib
+endif
+
+ifneq ($(EH_MECHANISM),)
+  LIBGNAT_TARGET_PAIRS += a-exexpr.adb<a-exexpr$(EH_MECHANISM).adb
+  EXTRA_LIBGNAT_SRCS+=raise$(EH_MECHANISM).c
+  EXTRA_LIBGNAT_OBJS+=raise$(EH_MECHANISM).o
+endif
+
+# Use the Ada 2005 version of Ada.Exceptions by default, unless specified
+# explicitly already. The base files (a-except.ad?) are used only for building
+# the compiler and other basic tools.
+# These base versions lack Ada 2005 additions which would cause bootstrap
+# problems if included in the compiler and other basic tools.
+
+ifeq ($(filter-out a-except%,$(LIBGNAT_TARGET_PAIRS)),$(LIBGNAT_TARGET_PAIRS))
+  LIBGNAT_TARGET_PAIRS += \
+    a-except.ads<a-except-2005.ads \
+    a-except.adb<a-except-2005.adb
+endif
+
+# The runtime library for gnat comprises two directories.  One contains the
+# Ada source files that the compiler (gnat1) needs -- these files are listed
+# by ADA_INCLUDE_SRCS -- and the other contains the object files and their
+# corresponding .ali files for the parts written in Ada, libgnat.a for
+# the parts of the runtime written in C, and libgthreads.a for the pthreads
+# emulation library.  LIBGNAT_OBJS lists the objects that go into libgnat.a,
+# while GNATRTL_OBJS lists the object files compiled from Ada sources that
+# go into the directory.  The pthreads emulation is built in the threads
+# subdirectory and copied.
+LIBGNAT_SRCS = ada.h adaint.c adaint.h argv.c cio.c cstreams.c \
+  errno.c exit.c cal.c ctrl_c.c env.c env.h \
+  raise.h raise.c sysdep.c aux-io.c init.c initialize.c seh_init.c \
+  final.c tracebak.c tb-alvms.c tb-alvxw.c tb-gcc.c expect.c mkdir.c \
+  socket.c gsocket.h targext.c $(EXTRA_LIBGNAT_SRCS)
+
+LIBGNAT_OBJS = adaint.o argv.o cio.o cstreams.o ctrl_c.o errno.o exit.o env.o \
+  raise.o sysdep.o aux-io.o init.o initialize.o seh_init.o cal.o \
+  final.o tracebak.o expect.o mkdir.o socket.o targext.o $(EXTRA_LIBGNAT_OBJS)
+
+# NOTE ??? - when the -I option for compiling Ada code is made to work,
+#  the library installation will change and there will be a
+#  GNAT_RTL_SRCS.  Right now we count on being able to build GNATRTL_OBJS
+#  from ADA_INCLUDE_SRCS.
+
+# GNATRTL_NONTASKING_OBJS and GNATRTL_TASKING_OBJS can be found in
+# the following include file:
+
+include $(fsrcdir)/Makefile.rtl
+
+GNATRTL_LINEARALGEBRA_OBJS = a-nlcoar.o a-nllcar.o a-nllrar.o a-nlrear.o \
+  a-nucoar.o a-nurear.o i-forbla.o i-forlap.o s-gearop.o
+
+GNATRTL_OBJS = $(GNATRTL_NONTASKING_OBJS) $(GNATRTL_TASKING_OBJS) \
+  $(GNATRTL_LINEARALGEBRA_OBJS) g-trasym.o memtrack.o
+
+# Default run time files
+
+ADA_INCLUDE_SRCS =\
+ ada.ads calendar.ads directio.ads gnat.ads interfac.ads ioexcept.ads \
+ machcode.ads text_io.ads unchconv.ads unchdeal.ads \
+ sequenio.ads system.ads memtrack.adb \
+ a-[a-o]*.adb a-[p-z]*.adb a-[a-o]*.ads a-[p-z]*.ads g-*.ad? i-*.ad? \
+ s-[a-o]*.adb s-[p-z]*.adb s-[a-o]*.ads s-[p-z]*.ads
+
+LIBGNAT=../rts/libgnat.a
+
+GCC_LINK=$(CC) -static-libgcc $(ADA_INCLUDES)
+
+# when compiling the tools, the runtime has to be first on the path so that
+# it hides the runtime files lying with the rest of the sources
+ifeq ($(TOOLSCASE),native)
+  vpath %.ads ../rts ../
+  vpath %.adb ../rts ../
+  vpath %.c   ../rts ../
+  vpath %.h   ../rts ../
+endif
+
+# in the cross tools case, everything is compiled with the native
+# gnatmake/link. Therefore only -I needs to be modified in ADA_INCLUDES
+ifeq ($(TOOLSCASE),cross)
+  vpath %.ads ../
+  vpath %.adb ../
+  vpath %.c   ../
+  vpath %.h   ../
+endif
+
+common-tools:
+	$(GNATMAKE) -c -b $(ADA_INCLUDES) \
+	  --GNATBIND="$(GNATBIND)" --GCC="$(CC) $(ALL_ADAFLAGS)" \
+	  gnatchop gnatcmd gnatkr gnatls gnatprep gnatxref gnatfind gnatname \
+	  gnatclean -bargs $(ADA_INCLUDES) $(GNATBIND_FLAGS)
+	$(GNATLINK) -v gnatcmd -o ../../gnat$(exeext) \
+		--GCC="$(GCC_LINK)" $(TOOLS_LIBS)
+	$(GNATLINK) -v gnatchop -o ../../gnatchop$(exeext) \
+		--GCC="$(GCC_LINK)" $(TOOLS_LIBS)
+	$(GNATLINK) -v gnatkr -o ../../gnatkr$(exeext) \
+		--GCC="$(GCC_LINK)" $(TOOLS_LIBS)
+	$(GNATLINK) -v gnatls -o ../../gnatls$(exeext) \
+		--GCC="$(GCC_LINK)" $(TOOLS_LIBS)
+	$(GNATLINK) -v gnatprep -o ../../gnatprep$(exeext) \
+		--GCC="$(GCC_LINK)" $(TOOLS_LIBS)
+	$(GNATLINK) -v gnatxref -o ../../gnatxref$(exeext) \
+		--GCC="$(GCC_LINK)" $(TOOLS_LIBS)
+	$(GNATLINK) -v gnatfind -o ../../gnatfind$(exeext) \
+		--GCC="$(GCC_LINK)" $(TOOLS_LIBS)
+	$(GNATLINK) -v gnatname -o ../../gnatname$(exeext) \
+		--GCC="$(GCC_LINK)" $(TOOLS_LIBS)
+	$(GNATLINK) -v gnatclean -o ../../gnatclean$(exeext) \
+		--GCC="$(GCC_LINK)" $(TOOLS_LIBS)
+
+../../gnatsym$(exeext): 
+	$(GNATMAKE) -c $(ADA_INCLUDES) gnatsym --GCC="$(CC) $(ALL_ADAFLAGS)"
+	$(GNATBIND) $(ADA_INCLUDES) $(GNATBIND_FLAGS) gnatsym
+	$(GNATLINK) -v gnatsym -o $@ --GCC="$(GCC_LINK)" $(TOOLS_LIBS)
+
+../../gnatdll$(exeext): 
+	$(GNATMAKE) -c $(ADA_INCLUDES) gnatdll --GCC="$(CC) $(ALL_ADAFLAGS)"
+	$(GNATBIND) $(ADA_INCLUDES) $(GNATBIND_FLAGS) gnatdll
+	$(GNATLINK) -v gnatdll -o $@ --GCC="$(GCC_LINK)" $(TOOLS_LIBS)
+
+../../vxaddr2line$(exeext): targext.o
+	$(GNATMAKE) -c  $(ADA_INCLUDES) vxaddr2line --GCC="$(CC) $(ALL_ADAFLAGS)"
+	$(GNATBIND) $(ADA_INCLUDES) $(GNATBIND_FLAGS) vxaddr2line
+	$(GNATLINK) -v vxaddr2line -o $@ --GCC="$(GCC_LINK)" targext.o $(CLIB)
+
+gnatmake-re:  link.o targext.o
+	$(GNATMAKE) $(ADA_INCLUDES) -u sdefault --GCC="$(CC) $(MOST_ADA_FLAGS)"
+	$(GNATMAKE) -c $(ADA_INCLUDES) gnatmake --GCC="$(CC) $(ALL_ADAFLAGS)"
+	$(GNATBIND) $(ADA_INCLUDES) $(GNATBIND_FLAGS) gnatmake
+	$(GNATLINK) -v gnatmake -o ../../gnatmake$(exeext) \
+		--GCC="$(GCC_LINK)" $(TOOLS_LIBS)
+
+# Note the use of the "mv" command in order to allow gnatlink to be linked with
+# with the former version of gnatlink itself which cannot override itself.
+gnatlink-re:  link.o targext.o
+	$(GNATMAKE) -c $(ADA_INCLUDES) gnatlink --GCC="$(CC) $(ALL_ADAFLAGS)"
+	$(GNATBIND) $(ADA_INCLUDES) $(GNATBIND_FLAGS) gnatlink
+	$(GNATLINK) -v gnatlink -o ../../gnatlinknew$(exeext) \
+		    --GCC="$(GCC_LINK)" $(TOOLS_LIBS)
+	$(MV)  ../../gnatlinknew$(exeext)  ../../gnatlink$(exeext)
+
+# Needs to be built with CC=gcc
+# Since the RTL should be built with the latest compiler, remove the
+#  stamp target in the parent directory whenever gnat1 is rebuilt
+
+# Likewise for the tools
+../../gnatmake$(exeext): $(P) b_gnatm.o link.o targext.o $(GNATMAKE_OBJS)
+	$(GCC_LINK) $(ALL_CFLAGS) $(LDFLAGS) -o $@ b_gnatm.o $(GNATMAKE_OBJS) \
+		    $(TOOLS_LIBS)
+
+../../gnatlink$(exeext): $(P) b_gnatl.o link.o targext.o $(GNATLINK_OBJS)
+	$(GCC_LINK) $(ALL_CFLAGS) $(LDFLAGS) -o $@ b_gnatl.o $(GNATLINK_OBJS) \
+		    $(TOOLS_LIBS)
+
+../stamp-gnatlib:
+	@if [ ! -f stamp-gnatlib ] ; \
+	then \
+	  $(ECHO) You must first build the GNAT library: make gnatlib; \
+	  false; \
+	else \
+	  true; \
+	fi
+
+install-gnatlib: ../stamp-gnatlib
+#	Create the directory before deleting it, in case the directory is
+#	a list of directories (as it may be on VMS). This ensures we are
+#	deleting the right one.
+	-$(MKDIR) $(DESTDIR)$(ADA_RTL_OBJ_DIR)
+	-$(MKDIR) $(DESTDIR)$(ADA_INCLUDE_DIR)
+	$(RMDIR) $(DESTDIR)$(ADA_RTL_OBJ_DIR)
+	$(RMDIR) $(DESTDIR)$(ADA_INCLUDE_DIR)
+	-$(MKDIR) $(DESTDIR)$(ADA_RTL_OBJ_DIR)
+	-$(MKDIR) $(DESTDIR)$(ADA_INCLUDE_DIR)
+	for file in rts/*.ali; do \
+	    $(INSTALL_DATA_DATE) $$file $(DESTDIR)$(ADA_RTL_OBJ_DIR); \
+	done
+	-$(INSTALL_DATA) rts/g-trasym$(objext) $(DESTDIR)$(ADA_RTL_OBJ_DIR)
+	-cd rts; for file in *$(arext);do \
+	    $(INSTALL_DATA) $$file $(DESTDIR)$(ADA_RTL_OBJ_DIR); \
+	    $(RANLIB_FOR_TARGET) $(DESTDIR)$(ADA_RTL_OBJ_DIR)/$$file; \
+	done
+	-$(foreach file, $(EXTRA_ADALIB_FILES), \
+	    $(INSTALL_DATA_DATE) rts/$(file) $(DESTDIR)$(ADA_RTL_OBJ_DIR) && \
+	) true
+#     Install the shared libraries, if any, using $(INSTALL) instead
+#     of $(INSTALL_DATA). The latter may force a mode inappropriate
+#     for shared libraries on some targets, e.g. on HP-UX where the x
+#     permission is required.
+	for file in gnat gnarl; do \
+	   if [ -f rts/lib$${file}$(hyphen)$(LIBRARY_VERSION)$(soext) ]; then \
+	      $(INSTALL) rts/lib$${file}$(hyphen)$(LIBRARY_VERSION)$(soext) \
+			 $(DESTDIR)$(ADA_RTL_OBJ_DIR); \
+	   fi; \
+	   if [ -f rts/lib$${file}$(soext) ]; then \
+	      $(LN_S) lib$${file}$(hyphen)$(LIBRARY_VERSION)$(soext) \
+	      $(DESTDIR)$(ADA_RTL_OBJ_DIR)/lib$${file}$(soext); \
+	   fi; \
+	done
+# This copy must be done preserving the date on the original file.
+	for file in rts/*.ad?; do \
+	    $(INSTALL_DATA_DATE) $$file $(DESTDIR)$(ADA_INCLUDE_DIR); \
+	done
+	cd $(DESTDIR)$(ADA_INCLUDE_DIR); $(CHMOD) a-wx *.adb
+	cd $(DESTDIR)$(ADA_INCLUDE_DIR); $(CHMOD) a-wx *.ads
+
+../stamp-gnatlib2:
+	$(RM) rts/s-*.ali
+	$(RM) rts/s-*$(objext)
+	$(RM) rts/a-*.ali
+	$(RM) rts/a-*$(objext)
+	$(RM) rts/*.ali
+	$(RM) rts/*$(objext)
+	$(RM) rts/*$(arext)
+	$(RM) rts/*$(soext)
+	touch ../stamp-gnatlib2
+	$(RM) ../stamp-gnatlib
+
+# NOTE: The $(foreach ...) commands assume ";" is the valid separator between
+#       successive target commands. Although the Gnu make documentation
+#       implies this is true on all systems, I suspect it may not be, So care
+#       has been taken to allow a sed script to look for ";)" and substitue
+#       for ";" the appropriate character in the range of lines below
+#       beginning with "GNULLI Begin" and ending with "GNULLI End"
+
+# GNULLI Begin ###########################################################
+
+../stamp-gnatlib1: Makefile ../stamp-gnatlib2
+	$(RMDIR) rts
+	$(MKDIR) rts
+	$(CHMOD) u+w rts
+# Copy target independent sources
+	$(foreach f,$(ADA_INCLUDE_SRCS) $(LIBGNAT_SRCS), \
+	  $(LN_S) $(fsrcpfx)$(f) rts ;) true
+# Remove files to be replaced by target dependent sources
+	$(RM) $(foreach PAIR,$(LIBGNAT_TARGET_PAIRS), \
+	                rts/$(word 1,$(subst <, ,$(PAIR))))
+	$(RM) rts/*-*-*.ads rts/*-*-*.adb
+# Copy new target dependent sources
+	$(foreach PAIR,$(LIBGNAT_TARGET_PAIRS), \
+	          $(LN_S) $(fsrcpfx)$(word 2,$(subst <, ,$(PAIR))) \
+	                rts/$(word 1,$(subst <, ,$(PAIR)));)
+	$(RM) ../stamp-gnatlib
+	touch ../stamp-gnatlib1
+
+# GNULLI End #############################################################
+
+# Don't use semicolon separated shell commands that involve list expansions.
+# The semicolon triggers a call to DCL on VMS and DCL can't handle command
+# line lengths in excess of 256 characters.
+# Example: cd rts; ar rc libfoo.a $(LONG_LIST_OF_OBJS)
+# is guaranteed to overflow the buffer.
+
+gnatlib: ../stamp-gnatlib1 ../stamp-gnatlib2
+	$(MAKE) -C rts \
+		CC="`echo \"$(GCC_FOR_TARGET)\" \
+		| sed -e 's,^\./xgcc,../../xgcc,' -e 's,-B\./,-B../../,'`" \
+	        INCLUDES="$(INCLUDES_FOR_SUBDIR) -I./../.." \
+                CFLAGS="$(GNATLIBCFLAGS_FOR_C)" \
+	        FORCE_DEBUG_ADAFLAGS="$(FORCE_DEBUG_ADAFLAGS)" \
+		srcdir=$(fsrcdir) \
+	        -f ../Makefile $(LIBGNAT_OBJS)
+	$(MAKE) -C rts \
+		CC="`echo \"$(GCC_FOR_TARGET)\" \
+		| sed -e 's,^\./xgcc,../../xgcc,' -e 's,-B\./,-B../../,'`" \
+	        ADA_INCLUDES="" \
+                CFLAGS="$(GNATLIBCFLAGS)" \
+	        ADAFLAGS="$(GNATLIBFLAGS)" \
+	        FORCE_DEBUG_ADAFLAGS="$(FORCE_DEBUG_ADAFLAGS)" \
+		srcdir=$(fsrcdir) \
+	        -f ../Makefile \
+	        $(GNATRTL_OBJS)
+	$(RM) rts/libgnat$(arext) rts/libgnarl$(arext)
+	$(AR_FOR_TARGET) $(AR_FLAGS) rts/libgnat$(arext) \
+	   $(addprefix rts/,$(GNATRTL_NONTASKING_OBJS) $(LIBGNAT_OBJS))
+        ifneq ($(PREFIX_OBJS),)
+		$(AR_FOR_TARGET) $(AR_FLAGS) rts/libgccprefix$(arext) \
+		  $(PREFIX_OBJS);
+		$(RANLIB_FOR_TARGET) rts/libgccprefix$(arext)
+        endif
+	$(RANLIB_FOR_TARGET) rts/libgnat$(arext)
+	$(AR_FOR_TARGET) $(AR_FLAGS) rts/libgnarl$(arext) \
+	   $(addprefix rts/,$(GNATRTL_TASKING_OBJS))
+	$(RANLIB_FOR_TARGET) rts/libgnarl$(arext)
+	$(AR_FOR_TARGET) $(AR_FLAGS) rts/libgnala$(arext) \
+	   $(addprefix rts/,$(GNATRTL_LINEARALGEBRA_OBJS))
+	$(RANLIB_FOR_TARGET) rts/libgnala$(arext)
+        ifeq ($(GMEM_LIB),gmemlib)
+		$(AR_FOR_TARGET) $(AR_FLAGS) rts/libgmem$(arext) \
+		  rts/memtrack.o
+		$(RANLIB_FOR_TARGET) rts/libgmem$(arext)
+        endif
+	$(CHMOD) a-wx rts/*.ali
+	touch ../stamp-gnatlib
+
+# Warning: this target assumes that LIBRARY_VERSION has been set correctly.
+gnatlib-shared-default:
+	$(MAKE) $(FLAGS_TO_PASS) \
+             GNATLIBFLAGS="$(GNATLIBFLAGS)" \
+	     GNATLIBCFLAGS="$(GNATLIBCFLAGS) $(TARGET_LIBGCC2_CFLAGS)" \
+	     THREAD_KIND="$(THREAD_KIND)" \
+             gnatlib
+	$(RM) rts/libgna*$(soext)
+	cd rts; ../../xgcc -B../../ -shared $(GNATLIBCFLAGS) \
+		$(TARGET_LIBGCC2_CFLAGS) \
+		-o libgnat$(hyphen)$(LIBRARY_VERSION)$(soext) \
+		$(GNATRTL_NONTASKING_OBJS) $(LIBGNAT_OBJS) \
+		$(SO_OPTS)libgnat$(hyphen)$(LIBRARY_VERSION)$(soext) \
+		$(MISCLIB) -lm
+	cd rts; ../../xgcc -B../../ -shared $(GNATLIBCFLAGS) \
+		$(TARGET_LIBGCC2_CFLAGS) \
+		-o libgnarl$(hyphen)$(LIBRARY_VERSION)$(soext) \
+		$(GNATRTL_TASKING_OBJS) \
+		$(SO_OPTS)libgnarl$(hyphen)$(LIBRARY_VERSION)$(soext) \
+		$(THREADSLIB)
+	cd rts; $(LN_S) libgnat$(hyphen)$(LIBRARY_VERSION)$(soext) \
+		libgnat$(soext)
+	cd rts; $(LN_S) libgnarl$(hyphen)$(LIBRARY_VERSION)$(soext) \
+		libgnarl$(soext)
+
+gnatlib-shared-dual:
+	$(MAKE) $(FLAGS_TO_PASS) \
+             GNATLIBFLAGS="$(GNATLIBFLAGS)" \
+	     GNATLIBCFLAGS="$(GNATLIBCFLAGS)" \
+	     THREAD_KIND="$(THREAD_KIND)" \
+             gnatlib-shared-default
+	$(MV) rts/libgna*$(soext) .
+	$(RM) ../stamp-gnatlib2
+	$(MAKE) $(FLAGS_TO_PASS) \
+             GNATLIBFLAGS="$(GNATLIBFLAGS)" \
+	     GNATLIBCFLAGS="$(GNATLIBCFLAGS)" \
+	     THREAD_KIND="$(THREAD_KIND)" \
+             gnatlib
+	$(MV) libgna*$(soext) rts
+
+gnatlib-shared-dual-win32:
+	$(MAKE) $(FLAGS_TO_PASS) \
+             GNATLIBFLAGS="$(GNATLIBFLAGS)" \
+	     GNATLIBCFLAGS="$(GNATLIBCFLAGS) $(TARGET_LIBGCC2_CFLAGS)" \
+	     THREAD_KIND="$(THREAD_KIND)" \
+             gnatlib-shared-win32
+	$(MV) rts/libgna*$(soext) .
+	$(RM) ../stamp-gnatlib2
+	$(MAKE) $(FLAGS_TO_PASS) \
+             GNATLIBFLAGS="$(GNATLIBFLAGS)" \
+	     GNATLIBCFLAGS="$(GNATLIBCFLAGS)" \
+	     THREAD_KIND="$(THREAD_KIND)" \
+             gnatlib
+	$(MV) libgna*$(soext) rts
+
+# ??? we need to add the option to support auto-import of arrays/records to
+# the GNATLIBFLAGS when this will be supported by GNAT. At this point we will
+# use the gnatlib-shared-dual-win32 target to build the GNAT runtimes on
+# Windows.
+gnatlib-shared-win32:
+	$(MAKE) $(FLAGS_TO_PASS) \
+             GNATLIBFLAGS="$(GNATLIBFLAGS)" \
+	     GNATLIBCFLAGS="$(GNATLIBCFLAGS) $(TARGET_LIBGCC2_CFLAGS)" \
+	     THREAD_KIND="$(THREAD_KIND)" \
+             gnatlib
+	$(RM) rts/libgna*$(soext)
+	cd rts; ../../xgcc -B../../ -shared $(TARGET_LIBGCC2_CFLAGS) \
+		-o libgnat$(hyphen)$(LIBRARY_VERSION)$(soext) \
+		$(GNATRTL_NONTASKING_OBJS) $(LIBGNAT_OBJS) \
+		$(SO_OPTS)libgnat$(hyphen)$(LIBRARY_VERSION)$(soext) $(MISCLIB)
+	cd rts; ../../xgcc -B../../ -shared $(TARGET_LIBGCC2_CFLAGS) \
+		-o libgnarl$(hyphen)$(LIBRARY_VERSION)$(soext) \
+		$(GNATRTL_TASKING_OBJS) \
+		$(SO_OPTS)libgnarl$(hyphen)$(LIBRARY_VERSION)$(soext) \
+		$(THREADSLIB) -Wl,libgnat$(hyphen)$(LIBRARY_VERSION)$(soext)
+
+gnatlib-shared-darwin:
+	$(MAKE) $(FLAGS_TO_PASS) \
+	     GNATLIBFLAGS="$(GNATLIBFLAGS)" \
+	     GNATLIBCFLAGS="$(GNATLIBCFLAGS) $(TARGET_LIBGCC2_CFLAGS) \
+	                    -fno-common" \
+	     THREAD_KIND="$(THREAD_KIND)" \
+	     gnatlib
+	$(RM) rts/libgnat$(soext) rts/libgnarl$(soext)
+	cd rts; ../../xgcc -B../../ -dynamiclib $(TARGET_LIBGCC2_CFLAGS) \
+		-o libgnat$(hyphen)$(LIBRARY_VERSION)$(soext) \
+		$(GNATRTL_NONTASKING_OBJS) $(LIBGNAT_OBJS) \
+		$(SO_OPTS) \
+		$(MISCLIB) -lm
+	cd rts; ../../xgcc -B../../ -dynamiclib $(TARGET_LIBGCC2_CFLAGS) \
+		-o libgnarl$(hyphen)$(LIBRARY_VERSION)$(soext) \
+		$(GNATRTL_TASKING_OBJS) \
+		$(SO_OPTS) \
+		$(THREADSLIB) -Wl,libgnat$(hyphen)$(LIBRARY_VERSION)$(soext)
+	cd rts; $(LN_S) libgnat$(hyphen)$(LIBRARY_VERSION)$(soext) \
+		libgnat$(soext)
+	cd rts; $(LN_S) libgnarl$(hyphen)$(LIBRARY_VERSION)$(soext) \
+		libgnarl$(soext)
+
+gnatlib-shared-vms:
+	$(MAKE) $(FLAGS_TO_PASS) \
+             GNATLIBFLAGS="$(GNATLIBFLAGS)" \
+	     GNATLIBCFLAGS="$(GNATLIBCFLAGS)" \
+	     THREAD_KIND="$(THREAD_KIND)" \
+             gnatlib
+	$(RM) rts/libgna*$(soext)
+	cd rts && \
+	../../gnatsym -s SYMVEC_$$$$.opt \
+	$(LIBGNAT_OBJS) $(GNATRTL_NONTASKING_OBJS) && \
+	../../xgcc -g -B../../ -shared -shared-libgcc \
+	   -o libgnat$(hyphen)$(LIBRARY_VERSION)$(soext) libgnat.a \
+	   sys\$$library:trace.exe \
+	   --for-linker=/noinform \
+	   --for-linker=SYMVEC_$$$$.opt \
+	   --for-linker=gsmatch=equal,$(GSMATCH_VERSION)
+	cd rts && \
+	../../gnatsym -s SYMVEC_$$$$.opt \
+	$(GNATRTL_TASKING_OBJS) && \
+	../../xgcc -g -B../../ -shared -shared-libgcc \
+	   -o libgnarl$(hyphen)$(LIBRARY_VERSION)$(soext) \
+	   libgnarl.a libgnat$(hyphen)$(LIBRARY_VERSION)$(soext) \
+	   sys\$$library:trace.exe \
+	   --for-linker=/noinform \
+	   --for-linker=SYMVEC_$$$$.opt \
+	   --for-linker=gsmatch=equal,$(GSMATCH_VERSION)
+
+gnatlib-shared:
+	$(MAKE) $(FLAGS_TO_PASS) \
+             GNATLIBFLAGS="$(GNATLIBFLAGS)" \
+	     GNATLIBCFLAGS="$(GNATLIBCFLAGS)" \
+	     THREAD_KIND="$(THREAD_KIND)" \
+	     TARGET_LIBGCC2_CFLAGS="$(TARGET_LIBGCC2_CFLAGS)" \
+             $(GNATLIB_SHARED)
+
+gnatlib-sjlj:
+	$(MAKE) $(FLAGS_TO_PASS) EH_MECHANISM="" ../stamp-gnatlib1
+	sed -e 's/ZCX_By_Default.*/ZCX_By_Default            : constant Boolean := False;/' rts/system.ads > rts/s.ads
+	$(MV) rts/s.ads rts/system.ads
+	$(MAKE) $(FLAGS_TO_PASS) \
+	     EH_MECHANISM="" \
+	     GNATLIBFLAGS="$(GNATLIBFLAGS)" \
+	     GNATLIBCFLAGS="$(GNATLIBCFLAGS)" \
+	     THREAD_KIND="$(THREAD_KIND)" \
+	     TARGET_LIBGCC2_CFLAGS="$(TARGET_LIBGCC2_CFLAGS)" gnatlib
+
+gnatlib-zcx:
+	$(MAKE) $(FLAGS_TO_PASS) EH_MECHANISM="-gcc" ../stamp-gnatlib1
+	sed -e 's/ZCX_By_Default.*/ZCX_By_Default            : constant Boolean := True;/' rts/system.ads > rts/s.ads
+	$(MV) rts/s.ads rts/system.ads
+	$(MAKE) $(FLAGS_TO_PASS) \
+	     EH_MECHANISM="-gcc" \
+	     GNATLIBFLAGS="$(GNATLIBFLAGS)" \
+	     GNATLIBCFLAGS="$(GNATLIBCFLAGS)" \
+	     THREAD_KIND="$(THREAD_KIND)" \
+	     TARGET_LIBGCC2_CFLAGS="$(TARGET_LIBGCC2_CFLAGS)" gnatlib
+
+# .s files for cross-building
+gnat-cross: force
+	make $(GNAT1_ADA_OBJS) CC="gcc -B../stage1/" CFLAGS="-S -gnatp"
+
+# Compiling object files from source files.
+
+# Note that dependencies on obstack.h are not written
+# because that file is not part of GCC.
+# Dependencies on gvarargs.h are not written
+# because all that file does, when not compiling with GCC,
+# is include the system varargs.h.
+
+b_gnatl.c : $(GNATLINK_OBJS)
+	$(GNATBIND) -C $(ADA_INCLUDES) -o b_gnatl.c gnatlink.ali
+b_gnatl.o : b_gnatl.c
+
+b_gnatm.c : $(GNATMAKE_OBJS)
+	$(GNATBIND) -C $(ADA_INCLUDES) -o b_gnatm.c gnatmake.ali
+b_gnatm.o : b_gnatm.c
+
+ADA_INCLUDE_DIR = $(libsubdir)/adainclude
+ADA_RTL_OBJ_DIR = $(libsubdir)/adalib
+
+# force no sibling call optimization on s-traceb.o so the number of stack
+# frames to be skipped when computing a call chain is not modified by
+# optimization. However we can do that only when building the runtime
+# (not the compiler) because the -fno-optimize-sibling-calls option exists
+# only in GCC 3 and above.
+
+ifneq (,$(findstring xgcc,$(CC)))
+NO_SIBLING_ADAFLAGS=-fno-optimize-sibling-calls
+else
+NO_SIBLING_ADAFLAGS=
+endif
+
+s-traceb.o  : s-traceb.adb
+	$(CC) -c $(ALL_ADAFLAGS) $(FORCE_DEBUG_ADAFLAGS) \
+	      $(NO_SIBLING_ADAFLAGS) $(ADA_INCLUDES) \
+      $< $(OUTPUT_OPTION)
+
+# force debugging information on s-tasdeb.o so that it is always
+# possible to set conditional breakpoints on tasks.
+
+s-tasdeb.o  : s-tasdeb.adb s-tasdeb.ads
+	$(CC) -c $(ALL_ADAFLAGS) $(FORCE_DEBUG_ADAFLAGS) -O0 $(ADA_INCLUDES) \
+	      $< $(OUTPUT_OPTION)
+
+# force no function reordering on a-except.o because of the exclusion bounds
+# mechanism (see the source file for more detailed information). However we
+# can do that only when building the runtime (not the compiler) because the
+# -fno-toplevel-reorder option exists only in GCC 4.2 and above.
+
+ifneq (,$(findstring xgcc,$(CC)))
+NO_REORDER_ADAFLAGS=-fno-toplevel-reorder
+else
+NO_REORDER_ADAFLAGS=
+endif
+
+# force debugging information on a-except.o so that it is always
+# possible to set conditional breakpoints on exceptions.
+# use -O1 otherwise gdb isn't able to get a full backtrace on mips targets.
+
+a-except.o  : a-except.adb a-except.ads
+	$(CC) -c $(ALL_ADAFLAGS) $(FORCE_DEBUG_ADAFLAGS) -O1 -fno-inline \
+	      $(NO_REORDER_ADAFLAGS) $(ADA_INCLUDES) $< $(OUTPUT_OPTION)
+
+# compile s-except.o without optimization and with debug info to let the
+# debugger set breakpoints and inspect subprogram parameters on exception
+# related events.
+
+s-except.o  : s-except.adb s-except.ads
+	$(CC) -c $(ALL_ADAFLAGS) $(FORCE_DEBUG_ADAFLAGS) -O0 $(ADA_INCLUDES) \
+	      $< $(OUTPUT_OPTION)
+
+# force debugging information on s-assert.o so that it is always
+# possible to set breakpoint on assert failures.
+
+s-assert.o  : s-assert.adb s-assert.ads a-except.ads
+	$(CC) -c $(ALL_ADAFLAGS) $(FORCE_DEBUG_ADAFLAGS) -O2 $(ADA_INCLUDES) \
+	      $< $(OUTPUT_OPTION)
+
+adadecode.o : adadecode.c adadecode.h
+aux-io.o  : aux-io.c
+argv.o    : argv.c
+cal.o     : cal.c
+deftarg.o : deftarg.c
+errno.o   : errno.c
+exit.o    : adaint.h exit.c
+expect.o  : expect.c
+final.o   : final.c
+gmem.o    : gmem.c
+link.o    : link.c
+mkdir.o   : mkdir.c
+socket.o  : socket.c gsocket.h
+sysdep.o  : sysdep.c
+raise-gcc.o : raise-gcc.c raise.h
+raise.o   : raise.c raise.h
+vx_stack_info.o : vx_stack_info.c
+
+gen-soccon: gen-soccon.c gsocket.h
+	$(CC) $(ALL_CFLAGS) $(ADA_CFLAGS) $(ALL_CPPFLAGS) $(INCLUDES) \
+		-UIN_GCC -DTARGET=\"$(target_alias)\" \
+		$< $(OUTPUT_OPTION)
+
+cio.o     : cio.c
+	$(CC) -c $(ALL_CFLAGS) $(ADA_CFLAGS) \
+	         $(ALL_CPPFLAGS) $(INCLUDES) $< $(OUTPUT_OPTION)
+
+init.o    : init.c adaint.h raise.h
+	$(CC) -c $(ALL_CFLAGS) $(ADA_CFLAGS) \
+	         $(ALL_CPPFLAGS) $(INCLUDES) $< $(OUTPUT_OPTION)
+
+initialize.o : initialize.c raise.h
+	$(CC) -c $(ALL_CFLAGS) $(ADA_CFLAGS) \
+	         $(ALL_CPPFLAGS) $(INCLUDES) $< $(OUTPUT_OPTION)
+
+targext.o : targext.c
+	$(CC) -c $(ALL_CFLAGS) $(ADA_CFLAGS) \
+		$(ALL_CPPFLAGS) $(INCLUDES_FOR_SUBDIR) \
+		$< $(OUTPUT_OPTION)
+
+# No optimization to compile this file as optimizations (-O1 or above) breaks
+# the SEH handling on Windows. The reasons are not clear.
+seh_init.o : seh_init.c raise.h
+	$(CC) -c $(ALL_CFLAGS) $(ADA_CFLAGS) -O0 \
+	         $(ALL_CPPFLAGS) $(INCLUDES) $< $(OUTPUT_OPTION)
+
+# Need to keep the frame pointer in this file to pop the stack properly on
+# some targets.
+tracebak.o  : tracebak.c tb-alvms.c tb-alvxw.c tb-gcc.c
+	$(CC) -c $(ALL_CFLAGS) $(ADA_CFLAGS) $(ALL_CPPFLAGS) $(INCLUDES) \
+	      -fno-omit-frame-pointer $< $(OUTPUT_OPTION)
+
+# In GNU Make, ignore whether `stage*' exists.
+.PHONY: stage1 stage2 stage3 stage4 clean realclean TAGS bootstrap
+.PHONY: risky-stage1 risky-stage2 risky-stage3 risky-stage4
+
+force:
+
+# Gnatlbr, Vms_help, and Gnat.hlp are only used on VMS
+
+../../gnatlbr$(exeext): ../../prefix.o
+	$(GNATMAKE) -c $(ADA_INCLUDES) gnatlbr --GCC="$(CC) $(ALL_ADAFLAGS)"
+	$(GNATBIND) $(ADA_INCLUDES) $(GNATBIND_FLAGS) gnatlbr
+	$(GNATLINK) -v gnatlbr -o $@ --GCC="$(GCC_LINK)" $(TOOLS_LIBS)
+
+../../vms_help$(exeext):
+	$(GNATMAKE) -c $(ADA_INCLUDES) vms_help --GCC="$(CC) $(ALL_ADAFLAGS)"
+	$(GNATBIND) $(ADA_INCLUDES) $(GNATBIND_FLAGS) vms_help
+	$(GNATLINK) -v vms_help -o $@ --GCC="$(GCC_LINK)" $(TOOLS_LIBS)
+
+../../gnat.hlp: ../../vms_help$(exeext)
+	../../vms_help$(exeext) $(fsrcdir)/gnat.help_in \
+	                        $(fsrcdir)/vms_data.ads ../../gnat.hlp
diff --git a/gcc/ada/gcc-interface/ada-tree.def b/gcc/ada/gcc-interface/ada-tree.def
new file mode 100644
index 00000000000..0a1949f6710
--- /dev/null
+++ b/gcc/ada/gcc-interface/ada-tree.def
@@ -0,0 +1,81 @@
+/****************************************************************************
+ *                                                                          *
+ *                         GNAT COMPILER COMPONENTS                         *
+ *                                                                          *
+ *                       GNAT-SPECIFIC GCC TREE CODES                       *
+ *                                                                          *
+ *                              Specification                               *
+ *                                                                          *
+ *            Copyright (C) 1992-2007, Free Software Foundation, Inc.       *
+ *                                                                          *
+ * GNAT is free software;  you can  redistribute it  and/or modify it under *
+ * terms of the  GNU General Public License as published  by the Free Soft- *
+ * ware  Foundation;  either version 3,  or (at your option) any later ver- *
+ * sion.  GNAT is distributed in the hope that it will be useful, but WITH- *
+ * OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY *
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License *
+ * for  more details.  You should have received a copy of the GNU General   *
+ * Public License along with GCC; see the file COPYING3.  If not see        *
+ * <http://www.gnu.org/licenses/>.                                          *
+ *                                                                          *
+ * GNAT was originally developed  by the GNAT team at  New York University. *
+ * Extensive contributions were provided by Ada Core Technologies Inc.      *
+ *                                                                          *
+ ****************************************************************************/
+
+/* A type that is an unconstrained array itself.  This node is never passed
+   to GCC. TREE_TYPE is the type of the fat pointer and TYPE_OBJECT_RECORD_TYPE
+   is the type of a record containing the template and data.  */
+
+DEFTREECODE (UNCONSTRAINED_ARRAY_TYPE, "unconstrained_array_type", tcc_type, 0)
+
+/* A reference to an unconstrained array.  This node only exists as an
+   intermediate node during the translation of a GNAT tree to a GCC tree;
+   it is never passed to GCC.  The only field used is operand 0, which
+   is the fat pointer object.  */
+
+DEFTREECODE (UNCONSTRAINED_ARRAY_REF, "unconstrained_array_ref",
+	    tcc_reference, 1)
+
+/* An expression that returns an RTL suitable for its type.  Operand 0
+   is an expression to be evaluated for side effects only.  */
+DEFTREECODE (NULL_EXPR, "null_expr", tcc_expression, 1)
+
+/* Same as ADDR_EXPR, except that if the operand represents a bit field,
+   return the address of the byte containing the bit.  This is used
+   for the 'Address attribute and never shows up in the tree.  */
+DEFTREECODE (ATTR_ADDR_EXPR, "attr_addr_expr", tcc_reference, 1)
+
+/* Here are the tree codes for the statement types known to Ada.  These
+   must be at the end of this file to allow IS_ADA_STMT to work.  */
+
+/* This is how record_code_position and insert_code_for work.  The former
+   makes this tree node, whose operand is a statement.  The latter inserts
+   the actual statements into this node.  Gimplification consists of
+   just returning the inner statement.  */
+DEFTREECODE (STMT_STMT, "stmt_stmt", tcc_statement, 1)
+
+/* A loop.  LOOP_STMT_TOP_COND and LOOP_STMT_BOT_COND are the tests to exit a
+   loop at the top and bottom, respectively.  LOOP_STMT_UPDATE is the statement
+   to update the loop iterator at the continue point.  LOOP_STMT_BODY are the
+   statements in the body of the loop.  LOOP_STMT_LABEL points to the LABEL_DECL
+   of the end label of the loop.  */
+DEFTREECODE (LOOP_STMT, "loop_stmt", tcc_statement, 5)
+
+/* Conditionally exit a loop.  EXIT_STMT_COND is the condition, which, if
+   true, will cause the loop to be exited.  If no condition is specified,
+   the loop is unconditionally exited.  EXIT_STMT_LABEL is the end label
+   corresponding to the loop to exit.  */
+DEFTREECODE (EXIT_STMT, "exit_stmt", tcc_statement, 2)
+
+/* A exception region.  REGION_STMT_BODY is the statement to be executed
+   inside the region.  REGION_STMT_HANDLE is a statement that represents
+   the exception handlers (usually a BLOCK_STMT of HANDLE_STMTs).
+   REGION_STMT_BLOCK is the BLOCK node for the declarative region, if any.  */
+DEFTREECODE (REGION_STMT, "region_stmt", tcc_statement, 3)
+
+/* An exception handler.  HANDLER_STMT_ARG is the value to pass to 
+   expand_start_catch, HANDLER_STMT_LIST is the list of statements for the
+   handler itself, and HANDLER_STMT_BLOCK is the BLOCK node for this
+   binding. */
+DEFTREECODE (HANDLER_STMT, "handler_stmt", tcc_statement, 3)
diff --git a/gcc/ada/gcc-interface/ada-tree.h b/gcc/ada/gcc-interface/ada-tree.h
new file mode 100644
index 00000000000..9c31e46f267
--- /dev/null
+++ b/gcc/ada/gcc-interface/ada-tree.h
@@ -0,0 +1,321 @@
+/****************************************************************************
+ *                                                                          *
+ *                         GNAT COMPILER COMPONENTS                         *
+ *                                                                          *
+ *                             A D A - T R E E                              *
+ *                                                                          *
+ *                              C Header File                               *
+ *                                                                          *
+ *          Copyright (C) 1992-2008, Free Software Foundation, Inc.         *
+ *                                                                          *
+ * GNAT is free software;  you can  redistribute it  and/or modify it under *
+ * terms of the  GNU General Public License as published  by the Free Soft- *
+ * ware  Foundation;  either version 3,  or (at your option) any later ver- *
+ * sion.  GNAT is distributed in the hope that it will be useful, but WITH- *
+ * OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY *
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License *
+ * for  more details.  You should have received a copy of the GNU General   *
+ * Public License along with GCC; see the file COPYING3.  If not see        *
+ * <http://www.gnu.org/licenses/>.                                          *
+ *                                                                          *
+ * GNAT was originally developed  by the GNAT team at  New York University. *
+ * Extensive contributions were provided by Ada Core Technologies Inc.      *
+ *                                                                          *
+ ****************************************************************************/
+
+/* Ada uses the lang_decl and lang_type fields to hold a tree.  */
+union lang_tree_node
+  GTY((desc ("0"),
+       chain_next ("(union lang_tree_node *)TREE_CHAIN (&%h.t)")))
+{
+  union tree_node GTY((tag ("0"))) t;
+};
+struct lang_decl GTY(()) {tree t; };
+struct lang_type GTY(()) {tree t; };
+
+/* Define macros to get and set the tree in TYPE_ and DECL_LANG_SPECIFIC.  */
+#define GET_TYPE_LANG_SPECIFIC(NODE) \
+  (TYPE_LANG_SPECIFIC (NODE) ? TYPE_LANG_SPECIFIC (NODE)->t : NULL_TREE)
+#define SET_TYPE_LANG_SPECIFIC(NODE, X)	\
+ (TYPE_LANG_SPECIFIC (NODE)			\
+  = (TYPE_LANG_SPECIFIC (NODE)			\
+     ? TYPE_LANG_SPECIFIC (NODE) : GGC_NEW (struct lang_type)))   \
+ ->t = X;
+
+#define GET_DECL_LANG_SPECIFIC(NODE) \
+  (DECL_LANG_SPECIFIC (NODE) ? DECL_LANG_SPECIFIC (NODE)->t : NULL_TREE)
+#define SET_DECL_LANG_SPECIFIC(NODE, VALUE)	\
+ (DECL_LANG_SPECIFIC (NODE)			\
+  = (DECL_LANG_SPECIFIC (NODE)			\
+     ? DECL_LANG_SPECIFIC (NODE) : GGC_NEW (struct lang_decl)))   \
+ ->t = VALUE;
+
+/* Flags added to GCC type nodes.  */
+
+/* For RECORD_TYPE, UNION_TYPE, and QUAL_UNION_TYPE, nonzero if this is a
+   record being used as a fat pointer (only true for RECORD_TYPE).  */
+#define TYPE_IS_FAT_POINTER_P(NODE) \
+  TYPE_LANG_FLAG_0 (RECORD_OR_UNION_CHECK (NODE))
+
+#define TYPE_FAT_POINTER_P(NODE)  \
+  (TREE_CODE (NODE) == RECORD_TYPE && TYPE_IS_FAT_POINTER_P (NODE))
+
+/* For integral types and array types, nonzero if this is a packed array type
+   used for bit-packed types.  Such types should not be extended to a larger
+   size or validated against a specified size.  */
+#define TYPE_PACKED_ARRAY_TYPE_P(NODE) TYPE_LANG_FLAG_0 (NODE)
+
+#define TYPE_IS_PACKED_ARRAY_TYPE_P(NODE) \
+  ((TREE_CODE (NODE) == INTEGER_TYPE || TREE_CODE (NODE) == ARRAY_TYPE) \
+   && TYPE_PACKED_ARRAY_TYPE_P (NODE))
+
+/* For INTEGER_TYPE, nonzero if this is a modular type with a modulus that
+   is not equal to two to the power of its mode's size.  */
+#define TYPE_MODULAR_P(NODE) TYPE_LANG_FLAG_1 (INTEGER_TYPE_CHECK (NODE))
+
+/* For ARRAY_TYPE, nonzero if this type corresponds to a dimension of
+   an Ada array other than the first.  */
+#define TYPE_MULTI_ARRAY_P(NODE)  TYPE_LANG_FLAG_1 (ARRAY_TYPE_CHECK (NODE))
+
+/* For FUNCTION_TYPE, nonzero if this denotes a function returning an
+   unconstrained array or record.  */
+#define TYPE_RETURNS_UNCONSTRAINED_P(NODE) \
+  TYPE_LANG_FLAG_1 (FUNCTION_TYPE_CHECK (NODE))
+
+/* For RECORD_TYPE, UNION_TYPE, and QUAL_UNION_TYPE, nonzero if this denotes
+   a justified modular type (will only be true for RECORD_TYPE).  */
+#define TYPE_JUSTIFIED_MODULAR_P(NODE) \
+  TYPE_LANG_FLAG_1 (RECORD_OR_UNION_CHECK (NODE))
+
+/* Nonzero in an arithmetic subtype if this is a subtype not known to the
+   front-end.  */
+#define TYPE_EXTRA_SUBTYPE_P(NODE) TYPE_LANG_FLAG_2 (NODE)
+
+/* Nonzero for composite types if this is a by-reference type.  */
+#define TYPE_BY_REFERENCE_P(NODE) TYPE_LANG_FLAG_2 (NODE)
+
+/* For RECORD_TYPE, UNION_TYPE, and QUAL_UNION_TYPE, nonzero if this is the
+   type for an object whose type includes its template in addition to
+   its value (only true for RECORD_TYPE).  */
+#define TYPE_CONTAINS_TEMPLATE_P(NODE) \
+  TYPE_LANG_FLAG_3 (RECORD_OR_UNION_CHECK (NODE))
+
+/* For INTEGER_TYPE, nonzero if this really represents a VAX
+   floating-point type.  */
+#define TYPE_VAX_FLOATING_POINT_P(NODE)  \
+  TYPE_LANG_FLAG_3 (INTEGER_TYPE_CHECK (NODE))
+
+/* True if NODE is a thin pointer.  */
+#define TYPE_THIN_POINTER_P(NODE)			\
+  (POINTER_TYPE_P (NODE)				\
+   && TREE_CODE (TREE_TYPE (NODE)) == RECORD_TYPE	\
+   && TYPE_CONTAINS_TEMPLATE_P (TREE_TYPE (NODE)))
+
+/* True if TYPE is either a fat or thin pointer to an unconstrained
+   array.  */
+#define TYPE_FAT_OR_THIN_POINTER_P(NODE) \
+  (TYPE_FAT_POINTER_P (NODE) || TYPE_THIN_POINTER_P (NODE))
+
+/* For INTEGER_TYPEs, nonzero if the type has a biased representation.  */
+#define TYPE_BIASED_REPRESENTATION_P(NODE) \
+  TYPE_LANG_FLAG_4 (INTEGER_TYPE_CHECK (NODE))
+
+/* For ARRAY_TYPEs, nonzero if the array type has Convention_Fortran.  */
+#define TYPE_CONVENTION_FORTRAN_P(NODE) \
+  TYPE_LANG_FLAG_4 (ARRAY_TYPE_CHECK (NODE))
+
+/* For FUNCTION_TYPEs, nonzero if the function returns by reference.  */
+#define TYPE_RETURNS_BY_REF_P(NODE) \
+  TYPE_LANG_FLAG_4 (FUNCTION_TYPE_CHECK (NODE))
+
+/* For VOID_TYPE, ENUMERAL_TYPE, UNION_TYPE, and RECORD_TYPE, nonzero if this
+   is a dummy type, made to correspond to a private or incomplete type.  */
+#define TYPE_DUMMY_P(NODE) TYPE_LANG_FLAG_4 (NODE)
+
+/* True if TYPE is such a dummy type.  */
+#define TYPE_IS_DUMMY_P(NODE) \
+  ((TREE_CODE (NODE) == VOID_TYPE || TREE_CODE (NODE) == RECORD_TYPE	\
+    || TREE_CODE (NODE) == UNION_TYPE || TREE_CODE (NODE) == ENUMERAL_TYPE) \
+   && TYPE_DUMMY_P (NODE))
+
+/* For FUNCTION_TYPEs, nonzero if function returns by being passed a pointer
+   to a place to store its result.  */
+#define TYPE_RETURNS_BY_TARGET_PTR_P(NODE) \
+  TYPE_LANG_FLAG_5 (FUNCTION_TYPE_CHECK (NODE))
+
+/* For an INTEGER_TYPE, nonzero if TYPE_ACTUAL_BOUNDS is present.  */
+#define TYPE_HAS_ACTUAL_BOUNDS_P(NODE) \
+  TYPE_LANG_FLAG_5 (INTEGER_TYPE_CHECK (NODE))
+
+/* For a RECORD_TYPE, nonzero if this was made just to supply needed
+   padding or alignment.  */
+#define TYPE_IS_PADDING_P(NODE) TYPE_LANG_FLAG_5 (RECORD_TYPE_CHECK (NODE))
+
+/* True if TYPE can alias any other types.  */
+#define TYPE_UNIVERSAL_ALIASING_P(NODE) TYPE_LANG_FLAG_6 (NODE)
+
+/* This field is only defined for FUNCTION_TYPE nodes. If the Ada
+   subprogram contains no parameters passed by copy in/copy out then this
+   field is 0. Otherwise it points to a list of nodes used to specify the
+   return values of the out (or in out) parameters that qualify to be passed
+   by copy in copy out.  It is a CONSTRUCTOR.  For a full description of the
+   cico parameter passing mechanism refer to the routine gnat_to_gnu_entity. */
+#define TYPE_CI_CO_LIST(NODE)  TYPE_LANG_SLOT_1 (FUNCTION_TYPE_CHECK (NODE))
+
+/* For an INTEGER_TYPE with TYPE_MODULAR_P, this is the value of the
+   modulus. */
+#define TYPE_MODULUS(NODE) GET_TYPE_LANG_SPECIFIC (INTEGER_TYPE_CHECK (NODE))
+#define SET_TYPE_MODULUS(NODE, X)  \
+  SET_TYPE_LANG_SPECIFIC (INTEGER_TYPE_CHECK (NODE), X)
+
+/* For an INTEGER_TYPE that is the TYPE_DOMAIN of some ARRAY_TYPE, points to
+   the type corresponding to the Ada index type.  */
+#define TYPE_INDEX_TYPE(NODE) \
+  GET_TYPE_LANG_SPECIFIC (INTEGER_TYPE_CHECK (NODE))
+#define SET_TYPE_INDEX_TYPE(NODE, X) \
+  SET_TYPE_LANG_SPECIFIC (INTEGER_TYPE_CHECK (NODE), X)
+
+/* For an INTEGER_TYPE with TYPE_VAX_FLOATING_POINT_P, stores the
+   Digits_Value.  */
+#define TYPE_DIGITS_VALUE(NODE) \
+  GET_TYPE_LANG_SPECIFIC (INTEGER_TYPE_CHECK (NODE))
+#define SET_TYPE_DIGITS_VALUE(NODE, X)  \
+  SET_TYPE_LANG_SPECIFIC (INTEGER_TYPE_CHECK (NODE), X)
+
+/* For numeric types, stores the RM_Size of the type.  */
+#define TYPE_RM_SIZE_NUM(NODE)	TYPE_LANG_SLOT_1 (NUMERICAL_TYPE_CHECK (NODE))
+
+#define TYPE_RM_SIZE(NODE)					\
+  (INTEGRAL_TYPE_P (NODE) || TREE_CODE (NODE) == REAL_TYPE	\
+   ? TYPE_RM_SIZE_NUM (NODE) : 0)
+
+/* For a RECORD_TYPE that is a fat pointer, point to the type for the
+   unconstrained object.  Likewise for a RECORD_TYPE that is pointed
+   to by a thin pointer.  */
+#define TYPE_UNCONSTRAINED_ARRAY(NODE)  \
+  GET_TYPE_LANG_SPECIFIC (RECORD_TYPE_CHECK (NODE))
+#define SET_TYPE_UNCONSTRAINED_ARRAY(NODE, X)  \
+  SET_TYPE_LANG_SPECIFIC (RECORD_TYPE_CHECK (NODE), X)
+
+/* For other RECORD_TYPEs and all UNION_TYPEs and QUAL_UNION_TYPEs, the Ada
+   size of the object.  This differs from the GCC size in that it does not
+   include any rounding up to the alignment of the type.  */
+#define TYPE_ADA_SIZE(NODE)   \
+  GET_TYPE_LANG_SPECIFIC (RECORD_OR_UNION_CHECK (NODE))
+#define SET_TYPE_ADA_SIZE(NODE, X) \
+  SET_TYPE_LANG_SPECIFIC (RECORD_OR_UNION_CHECK (NODE), X)
+
+/* For an INTEGER_TYPE with TYPE_HAS_ACTUAL_BOUNDS_P or an ARRAY_TYPE, this is
+   the index type that should be used when the actual bounds are required for
+   a template.  This is used in the case of packed arrays.  */
+#define TYPE_ACTUAL_BOUNDS(NODE)   \
+  GET_TYPE_LANG_SPECIFIC (TREE_CHECK2 (NODE, INTEGER_TYPE, ARRAY_TYPE))
+#define SET_TYPE_ACTUAL_BOUNDS(NODE, X) \
+  SET_TYPE_LANG_SPECIFIC (TREE_CHECK2 (NODE, INTEGER_TYPE, ARRAY_TYPE), X)
+
+/* In an UNCONSTRAINED_ARRAY_TYPE, points to the record containing both
+   the template and object.
+
+   ??? We also put this on an ENUMERAL_TYPE that's dummy.  Technically,
+   this is a conflict on the minval field, but there doesn't seem to be
+   simple fix, so we'll live with this kludge for now.  */
+#define TYPE_OBJECT_RECORD_TYPE(NODE) \
+  (TREE_CHECK2 ((NODE), UNCONSTRAINED_ARRAY_TYPE, ENUMERAL_TYPE)->type.minval)
+
+/* Nonzero in a FUNCTION_DECL that represents a stubbed function
+   discriminant.  */
+#define DECL_STUBBED_P(NODE) DECL_LANG_FLAG_0 (FUNCTION_DECL_CHECK (NODE))
+
+/* Nonzero in a VAR_DECL if it is guaranteed to be constant after having
+   been elaborated and TREE_READONLY is not set on it.  */
+#define DECL_READONLY_ONCE_ELAB(NODE) DECL_LANG_FLAG_0 (VAR_DECL_CHECK (NODE))
+
+/* Nonzero if this decl is always used by reference; i.e., an INDIRECT_REF
+   is needed to access the object.  */
+#define DECL_BY_REF_P(NODE) DECL_LANG_FLAG_1 (NODE)
+
+/* Nonzero in a FIELD_DECL that is a dummy built for some internal reason.  */
+#define DECL_INTERNAL_P(NODE) DECL_LANG_FLAG_3 (FIELD_DECL_CHECK (NODE))
+
+/* Nonzero if this decl is a PARM_DECL for an Ada array being passed to a
+   foreign convention subprogram.  */
+#define DECL_BY_COMPONENT_PTR_P(NODE) DECL_LANG_FLAG_3 (PARM_DECL_CHECK (NODE))
+
+/* Nonzero in a FUNCTION_DECL that corresponds to an elaboration procedure.  */
+#define DECL_ELABORATION_PROC_P(NODE) \
+  DECL_LANG_FLAG_3 (FUNCTION_DECL_CHECK (NODE))
+
+/* Nonzero if this is a decl for a pointer that points to something which
+   is readonly.  Used mostly for fat pointers.  */
+#define DECL_POINTS_TO_READONLY_P(NODE) DECL_LANG_FLAG_4 (NODE)
+
+/* Nonzero in a FIELD_DECL if there was a record rep clause.  */
+#define DECL_HAS_REP_P(NODE) DECL_LANG_FLAG_5 (FIELD_DECL_CHECK (NODE))
+
+/* Nonzero in a PARM_DECL if we are to pass by descriptor.  */
+#define DECL_BY_DESCRIPTOR_P(NODE) DECL_LANG_FLAG_5 (PARM_DECL_CHECK (NODE))
+
+/* Nonzero in a VAR_DECL if it is a pointer renaming a global object.  */
+#define DECL_RENAMING_GLOBAL_P(NODE) DECL_LANG_FLAG_5 (VAR_DECL_CHECK (NODE))
+
+/* In a CONST_DECL, points to a VAR_DECL that is allocatable to
+   memory.  Used when a scalar constant is aliased or has its
+   address taken.  */
+#define DECL_CONST_CORRESPONDING_VAR(NODE) \
+  GET_DECL_LANG_SPECIFIC (CONST_DECL_CHECK (NODE))
+#define SET_DECL_CONST_CORRESPONDING_VAR(NODE, X) \
+  SET_DECL_LANG_SPECIFIC (CONST_DECL_CHECK (NODE), X)
+
+/* In a FIELD_DECL, points to the FIELD_DECL that was the ultimate
+   source of the decl.  */
+#define DECL_ORIGINAL_FIELD(NODE) \
+  GET_DECL_LANG_SPECIFIC (FIELD_DECL_CHECK (NODE))
+#define SET_DECL_ORIGINAL_FIELD(NODE, X) \
+  SET_DECL_LANG_SPECIFIC (FIELD_DECL_CHECK (NODE), X)
+
+/* In a VAR_DECL, points to the object being renamed if the VAR_DECL is a
+   renaming pointer, otherwise 0.  Note that this object is guaranteed to
+   be protected against multiple evaluations.  */
+#define DECL_RENAMED_OBJECT(NODE) \
+  GET_DECL_LANG_SPECIFIC (VAR_DECL_CHECK (NODE))
+#define SET_DECL_RENAMED_OBJECT(NODE, X) \
+  SET_DECL_LANG_SPECIFIC (VAR_DECL_CHECK (NODE), X)
+
+/* In a TYPE_DECL, points to the parallel type if any, otherwise 0.  */
+#define DECL_PARALLEL_TYPE(NODE) \
+  GET_DECL_LANG_SPECIFIC (TYPE_DECL_CHECK (NODE))
+#define SET_DECL_PARALLEL_TYPE(NODE, X) \
+  SET_DECL_LANG_SPECIFIC (TYPE_DECL_CHECK (NODE), X)
+
+/* In a FUNCTION_DECL, points to the stub associated with the function
+   if any, otherwise 0.  */
+#define DECL_FUNCTION_STUB(NODE) \
+  GET_DECL_LANG_SPECIFIC (FUNCTION_DECL_CHECK (NODE))
+#define SET_DECL_FUNCTION_STUB(NODE, X) \
+  SET_DECL_LANG_SPECIFIC (FUNCTION_DECL_CHECK (NODE), X)
+
+/* In a FIELD_DECL corresponding to a discriminant, contains the
+   discriminant number.  */
+#define DECL_DISCRIMINANT_NUMBER(NODE) DECL_INITIAL (FIELD_DECL_CHECK (NODE))
+
+/* Define fields and macros for statements.
+
+   Start by defining which tree codes are used for statements.  */
+#define IS_STMT(NODE)		(STATEMENT_CLASS_P (NODE))
+#define IS_ADA_STMT(NODE)	(IS_STMT (NODE)				\
+				 && TREE_CODE (NODE) >= STMT_STMT)
+
+#define STMT_STMT_STMT(NODE)	TREE_OPERAND_CHECK_CODE (NODE, STMT_STMT, 0)
+#define LOOP_STMT_TOP_COND(NODE) TREE_OPERAND_CHECK_CODE (NODE, LOOP_STMT, 0)
+#define LOOP_STMT_BOT_COND(NODE) TREE_OPERAND_CHECK_CODE (NODE, LOOP_STMT, 1)
+#define LOOP_STMT_UPDATE(NODE)	TREE_OPERAND_CHECK_CODE (NODE, LOOP_STMT, 2)
+#define LOOP_STMT_BODY(NODE)	TREE_OPERAND_CHECK_CODE (NODE, LOOP_STMT, 3)
+#define LOOP_STMT_LABEL(NODE)	TREE_OPERAND_CHECK_CODE (NODE, LOOP_STMT, 4)
+#define EXIT_STMT_COND(NODE)	TREE_OPERAND_CHECK_CODE (NODE, EXIT_STMT, 0)
+#define EXIT_STMT_LABEL(NODE)	TREE_OPERAND_CHECK_CODE (NODE, EXIT_STMT, 1)
+#define REGION_STMT_BODY(NODE)	TREE_OPERAND_CHECK_CODE (NODE, REGION_STMT, 0)
+#define REGION_STMT_HANDLE(NODE) TREE_OPERAND_CHECK_CODE (NODE, REGION_STMT, 1)
+#define REGION_STMT_BLOCK(NODE)	TREE_OPERAND_CHECK_CODE (NODE, REGION_STMT, 2)
+#define HANDLER_STMT_ARG(NODE) TREE_OPERAND_CHECK_CODE (NODE, HANDLER_STMT, 0)
+#define HANDLER_STMT_LIST(NODE)	TREE_OPERAND_CHECK_CODE (NODE, HANDLER_STMT, 1)
+#define HANDLER_STMT_BLOCK(NODE) TREE_OPERAND_CHECK_CODE(NODE, HANDLER_STMT, 2)
diff --git a/gcc/ada/gcc-interface/ada.h b/gcc/ada/gcc-interface/ada.h
new file mode 100644
index 00000000000..5f2191fdec9
--- /dev/null
+++ b/gcc/ada/gcc-interface/ada.h
@@ -0,0 +1,80 @@
+/****************************************************************************
+ *                                                                          *
+ *                         GNAT COMPILER COMPONENTS                         *
+ *                                                                          *
+ *                                  A D A                                   *
+ *                                                                          *
+ *                              C Header File                               *
+ *                                                                          *
+ *          Copyright (C) 1992-2008, Free Software Foundation, Inc.         *
+ *                                                                          *
+ * GNAT is free software;  you can  redistribute it  and/or modify it under *
+ * terms of the  GNU General Public License as published  by the Free Soft- *
+ * ware  Foundation;  either version 2,  or (at your option) any later ver- *
+ * sion.  GNAT is distributed in the hope that it will be useful, but WITH- *
+ * OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY *
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License *
+ * for  more details.  You should have  received  a copy of the GNU General *
+ * Public License  distributed with GNAT;  see file COPYING.  If not, write *
+ * to  the  Free Software Foundation,  51  Franklin  Street,  Fifth  Floor, *
+ * Boston, MA 02110-1301, USA.                                              *
+ *                                                                          *
+ * As a  special  exception,  if you  link  this file  with other  files to *
+ * produce an executable,  this file does not by itself cause the resulting *
+ * executable to be covered by the GNU General Public License. This except- *
+ * ion does not  however invalidate  any other reasons  why the  executable *
+ * file might be covered by the  GNU Public License.                        *
+ *                                                                          *
+ * GNAT was originally developed  by the GNAT team at  New York University. *
+ * Extensive contributions were provided by Ada Core Technologies Inc.      *
+ *                                                                          *
+ ****************************************************************************/
+
+/* This file contains some standard macros for performing Ada-like
+   operations. These are used to aid in the translation of other headers. */
+
+#ifndef GCC_ADA_H
+#define GCC_ADA_H
+
+/* Inlined functions in header are preceded by INLINE, which is normally set
+   to extern inline for GCC, but may be set to static for use in standard
+   ANSI-C.  */
+
+#ifndef INLINE
+#ifdef __GNUC__
+#define INLINE static inline
+#else
+#define INLINE static
+#endif
+#endif
+
+/* Define a macro to concatenate two strings.  Write it for ANSI C and
+   for traditional C.  */
+
+#ifdef __STDC__
+#define CAT(A,B) A##B
+#else
+#define _ECHO(A) A
+#define CAT(A,B) ECHO(A)B
+#endif
+
+/* The following macro definition simulates the effect of a declaration of
+   a subtype, where the first two parameters give the name of the type and
+   subtype, and the third and fourth parameters give the subtype range. The
+   effect is to compile a typedef defining the subtype as a synonym for the
+   type, together with two constants defining the end points.  */
+
+#define SUBTYPE(SUBTYPE,TYPE,FIRST,LAST)	\
+  typedef TYPE SUBTYPE;				\
+  enum { CAT (SUBTYPE,__First) = FIRST,		\
+         CAT (SUBTYPE,__Last) = LAST };
+
+/* The following definitions provide the equivalent of the Ada IN and NOT IN
+   operators, assuming that the subtype involved has been defined using the
+   SUBTYPE macro defined above.  */
+
+#define IN(VALUE,SUBTYPE) \
+  (((VALUE) >= (SUBTYPE) CAT (SUBTYPE,__First)) \
+   && ((VALUE) <= (SUBTYPE) CAT (SUBTYPE,__Last)))
+
+#endif
diff --git a/gcc/ada/gcc-interface/config-lang.in b/gcc/ada/gcc-interface/config-lang.in
new file mode 100644
index 00000000000..4eb979034a2
--- /dev/null
+++ b/gcc/ada/gcc-interface/config-lang.in
@@ -0,0 +1,43 @@
+# Top level configure fragment for GNU Ada (GNAT).
+#   Copyright (C) 1994-2008 Free Software Foundation, Inc.
+
+#This file is part of GCC.
+
+#GCC is free software; you can redistribute it and/or modify
+#it under the terms of the GNU General Public License as published by
+#the Free Software Foundation; either version 3, or (at your option)
+#any later version.
+
+#GCC is distributed in the hope that it will be useful,
+#but WITHOUT ANY WARRANTY; without even the implied warranty of
+#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#GNU General Public License for more details.
+
+#You should have received a copy of the GNU General Public License
+#along with GCC; see the file COPYING3.  If not see
+#<http://www.gnu.org/licenses/>.
+
+# Configure looks for the existence of this file to auto-config each language.
+# We define several parameters used by configure:
+#
+# language	- name of language as it would appear in $(LANGUAGES)
+# boot_language - "yes" if we need to build this language in stage1
+# compilers	- value to add to $(COMPILERS)
+
+language="ada"
+gcc_subdir="ada/gcc-interface"
+
+boot_language=yes
+boot_language_boot_flags='ADAFLAGS="$(BOOT_ADAFLAGS)"'
+
+compilers="gnat1\$(exeext)"
+
+gtfiles="\$(srcdir)/ada/gcc-interface/ada-tree.h \$(srcdir)/ada/gcc-interface/gigi.h \$(srcdir)/ada/gcc-interface/decl.c \$(srcdir)/ada/gcc-interface/trans.c \$(srcdir)/ada/gcc-interface/utils.c"
+
+outputs="ada/gcc-interface/Makefile ada/Makefile"
+
+target_libs="target-libada"
+lang_dirs="gnattools"
+
+# Ada will not work until the front end starts emitting GIMPLE trees.
+build_by_default=no
diff --git a/gcc/ada/gcc-interface/cuintp.c b/gcc/ada/gcc-interface/cuintp.c
new file mode 100644
index 00000000000..90ea342f6b5
--- /dev/null
+++ b/gcc/ada/gcc-interface/cuintp.c
@@ -0,0 +1,142 @@
+/****************************************************************************
+ *                                                                          *
+ *                        GNAT COMPILER COMPONENTS                          *
+ *                                                                          *
+ *                               C U I N T P                                *
+ *                                                                          *
+ *                          C Implementation File                           *
+ *                                                                          *
+ *          Copyright (C) 1992-2008, Free Software Foundation, Inc.         *
+ *                                                                          *
+ * GNAT is free software;  you can  redistribute it  and/or modify it under *
+ * terms of the  GNU General Public License as published  by the Free Soft- *
+ * ware  Foundation;  either version 3,  or (at your option) any later ver- *
+ * sion.  GNAT is distributed in the hope that it will be useful, but WITH- *
+ * OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY *
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License *
+ * for  more details.  You should have received a copy of the GNU General   *
+ * Public License along with GCC; see the file COPYING3.  If not see        *
+ * <http://www.gnu.org/licenses/>.                                          *
+ *                                                                          *
+ * GNAT was originally developed  by the GNAT team at  New York University. *
+ * Extensive contributions were provided by Ada Core Technologies Inc.      *
+ *                                                                          *
+ ****************************************************************************/
+
+/* This file corresponds to the Ada package body Uintp. It was created
+   manually from the files uintp.ads and uintp.adb. */
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
+#include "tree.h"
+#include "ada.h"
+#include "types.h"
+#include "uintp.h"
+#include "atree.h"
+#include "elists.h"
+#include "nlists.h"
+#include "stringt.h"
+#include "fe.h"
+#include "gigi.h"
+#include "ada-tree.h"
+
+/* Universal integers are represented by the Uint type which is an index into
+   the Uints_Ptr table containing Uint_Entry values.  A Uint_Entry contains an
+   index and length for getting the "digits" of the universal integer from the
+   Udigits_Ptr table.
+
+   For efficiency, this method is used only for integer values larger than the
+   constant Uint_Bias.  If a Uint is less than this constant, then it contains
+   the integer value itself.  The origin of the Uints_Ptr table is adjusted so
+   that a Uint value of Uint_Bias indexes the first element.
+
+   First define a utility function that operates like build_int_cst for
+   integral types and does a conversion to floating-point for real types.  */
+
+static tree
+build_cst_from_int (tree type, HOST_WIDE_INT low)
+{
+  if (TREE_CODE (type) == REAL_TYPE)
+    return convert (type, build_int_cst (NULL_TREE, low));
+  else
+    return build_int_cst_type (type, low);
+}
+
+/* Similar to UI_To_Int, but return a GCC INTEGER_CST or REAL_CST node,
+   depending on whether TYPE is an integral or real type.  Overflow is tested
+   by the constant-folding used to build the node.  TYPE is the GCC type of
+   the resulting node.  */
+
+tree
+UI_To_gnu (Uint Input, tree type)
+{
+  tree gnu_ret;
+
+  /* We might have a TYPE with biased representation and be passed an
+     unbiased value that doesn't fit.  We always use an unbiased type able
+     to hold any such possible value for intermediate computations, and
+     then rely on a conversion back to TYPE to perform the bias adjustment
+     when need be.  */
+
+  int biased_type_p
+    = (TREE_CODE (type) == INTEGER_TYPE
+       && TYPE_BIASED_REPRESENTATION_P (type));
+
+  tree comp_type = biased_type_p ? get_base_type (type) : type;
+
+  if (Input <= Uint_Direct_Last)
+    gnu_ret = build_cst_from_int (comp_type, Input - Uint_Direct_Bias);
+  else
+    {
+      Int Idx = Uints_Ptr[Input].Loc;
+      Pos Length = Uints_Ptr[Input].Length;
+      Int First = Udigits_Ptr[Idx];
+      tree gnu_base;
+
+      gcc_assert (Length > 0);
+
+      /* The computations we perform below always require a type at least as
+	 large as an integer not to overflow.  REAL types are always fine, but
+	 INTEGER or ENUMERAL types we are handed may be too short.  We use a
+	 base integer type node for the computations in this case and will
+	 convert the final result back to the incoming type later on.
+	 The base integer precision must be superior than 16.  */
+
+      if (TREE_CODE (comp_type) != REAL_TYPE
+	  && TYPE_PRECISION (comp_type) < TYPE_PRECISION (long_integer_type_node))
+	{
+	  comp_type = long_integer_type_node;
+	  gcc_assert (TYPE_PRECISION (comp_type) > 16);
+	}
+
+      gnu_base = build_cst_from_int (comp_type, Base);
+
+      gnu_ret = build_cst_from_int (comp_type, First);
+      if (First < 0)
+	for (Idx++, Length--; Length; Idx++, Length--)
+	  gnu_ret = fold_build2 (MINUS_EXPR, comp_type,
+				 fold_build2 (MULT_EXPR, comp_type,
+					      gnu_ret, gnu_base),
+				 build_cst_from_int (comp_type,
+						     Udigits_Ptr[Idx]));
+      else
+	for (Idx++, Length--; Length; Idx++, Length--)
+	  gnu_ret = fold_build2 (PLUS_EXPR, comp_type,
+				 fold_build2 (MULT_EXPR, comp_type,
+					      gnu_ret, gnu_base),
+				 build_cst_from_int (comp_type,
+						     Udigits_Ptr[Idx]));
+    }
+
+  gnu_ret = convert (type, gnu_ret);
+
+  /* We don't need any NOP_EXPR or NON_LVALUE_EXPR on GNU_RET.  */
+  while ((TREE_CODE (gnu_ret) == NOP_EXPR
+	  || TREE_CODE (gnu_ret) == NON_LVALUE_EXPR)
+	 && TREE_TYPE (TREE_OPERAND (gnu_ret, 0)) == TREE_TYPE (gnu_ret))
+    gnu_ret = TREE_OPERAND (gnu_ret, 0);
+
+  return gnu_ret;
+}
diff --git a/gcc/ada/gcc-interface/decl.c b/gcc/ada/gcc-interface/decl.c
new file mode 100644
index 00000000000..ebc2e5edd14
--- /dev/null
+++ b/gcc/ada/gcc-interface/decl.c
@@ -0,0 +1,7648 @@
+/****************************************************************************
+ *                                                                          *
+ *                         GNAT COMPILER COMPONENTS                         *
+ *                                                                          *
+ *                                 D E C L                                  *
+ *                                                                          *
+ *                          C Implementation File                           *
+ *                                                                          *
+ *          Copyright (C) 1992-2008, Free Software Foundation, Inc.         *
+ *                                                                          *
+ * GNAT is free software;  you can  redistribute it  and/or modify it under *
+ * terms of the  GNU General Public License as published  by the Free Soft- *
+ * ware  Foundation;  either version 3,  or (at your option) any later ver- *
+ * sion.  GNAT is distributed in the hope that it will be useful, but WITH- *
+ * OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY *
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License *
+ * for  more details.  You should have received a copy of the GNU General   *
+ * Public License along with GCC; see the file COPYING3.  If not see        *
+ * <http://www.gnu.org/licenses/>.                                          *
+ *                                                                          *
+ * GNAT was originally developed  by the GNAT team at  New York University. *
+ * Extensive contributions were provided by Ada Core Technologies Inc.      *
+ *                                                                          *
+ ****************************************************************************/
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
+#include "tree.h"
+#include "flags.h"
+#include "toplev.h"
+#include "convert.h"
+#include "ggc.h"
+#include "obstack.h"
+#include "target.h"
+#include "expr.h"
+
+#include "ada.h"
+#include "types.h"
+#include "atree.h"
+#include "elists.h"
+#include "namet.h"
+#include "nlists.h"
+#include "repinfo.h"
+#include "snames.h"
+#include "stringt.h"
+#include "uintp.h"
+#include "fe.h"
+#include "sinfo.h"
+#include "einfo.h"
+#include "hashtab.h"
+#include "ada-tree.h"
+#include "gigi.h"
+
+#ifndef MAX_FIXED_MODE_SIZE
+#define MAX_FIXED_MODE_SIZE GET_MODE_BITSIZE (DImode)
+#endif
+
+/* Convention_Stdcall should be processed in a specific way on Windows targets
+   only.  The macro below is a helper to avoid having to check for a Windows
+   specific attribute throughout this unit.  */
+
+#if TARGET_DLLIMPORT_DECL_ATTRIBUTES
+#define Has_Stdcall_Convention(E) (Convention (E) == Convention_Stdcall)
+#else
+#define Has_Stdcall_Convention(E) (0)
+#endif
+
+/* Stack realignment for functions with foreign conventions is provided on a
+   per back-end basis now, as it is handled by the prologue expanders and not
+   as part of the function's body any more.  It might be requested by way of a
+   dedicated function type attribute on the targets that support it.
+
+   We need a way to avoid setting the attribute on the targets that don't
+   support it and use FORCE_PREFERRED_STACK_BOUNDARY_IN_MAIN for this purpose.
+
+   It is defined on targets where the circuitry is available, and indicates
+   whether the realignment is needed for 'main'. We use this to decide for
+   foreign subprograms as well.
+
+   It is not defined on targets where the circuitry is not implemented, and
+   we just never set the attribute in these cases.
+
+   Whether it is defined on all targets that would need it in theory is
+   not entirely clear.  We currently trust the base GCC settings for this
+   purpose.  */
+
+#ifndef FORCE_PREFERRED_STACK_BOUNDARY_IN_MAIN
+#define FORCE_PREFERRED_STACK_BOUNDARY_IN_MAIN 0
+#endif
+
+struct incomplete
+{
+  struct incomplete *next;
+  tree old_type;
+  Entity_Id full_type;
+};
+
+/* These variables are used to defer recursively expanding incomplete types
+   while we are processing an array, a record or a subprogram type.  */
+static int defer_incomplete_level = 0;
+static struct incomplete *defer_incomplete_list;
+
+/* This variable is used to delay expanding From_With_Type types until the
+   end of the spec.  */
+static struct incomplete *defer_limited_with;
+
+/* These variables are used to defer finalizing types.  The element of the
+   list is the TYPE_DECL associated with the type.  */
+static int defer_finalize_level = 0;
+static VEC (tree,heap) *defer_finalize_list;
+
+/* A hash table used to cache the result of annotate_value.  */
+static GTY ((if_marked ("tree_int_map_marked_p"),
+	     param_is (struct tree_int_map))) htab_t annotate_value_cache;
+
+static void copy_alias_set (tree, tree);
+static tree substitution_list (Entity_Id, Entity_Id, tree, bool);
+static bool allocatable_size_p (tree, bool);
+static void prepend_one_attribute_to (struct attrib **,
+				      enum attr_type, tree, tree, Node_Id);
+static void prepend_attributes (Entity_Id, struct attrib **);
+static tree elaborate_expression (Node_Id, Entity_Id, tree, bool, bool, bool);
+static bool is_variable_size (tree);
+static tree elaborate_expression_1 (Node_Id, Entity_Id, tree, tree,
+				    bool, bool);
+static tree make_packable_type (tree, bool);
+static tree gnat_to_gnu_field (Entity_Id, tree, int, bool);
+static tree gnat_to_gnu_param (Entity_Id, Mechanism_Type, Entity_Id, bool,
+			       bool *);
+static bool same_discriminant_p (Entity_Id, Entity_Id);
+static bool array_type_has_nonaliased_component (Entity_Id, tree);
+static void components_to_record (tree, Node_Id, tree, int, bool, tree *,
+				  bool, bool, bool, bool);
+static Uint annotate_value (tree);
+static void annotate_rep (Entity_Id, tree);
+static tree compute_field_positions (tree, tree, tree, tree, unsigned int);
+static tree validate_size (Uint, tree, Entity_Id, enum tree_code, bool, bool);
+static void set_rm_size (Uint, tree, Entity_Id);
+static tree make_type_from_size (tree, tree, bool);
+static unsigned int validate_alignment (Uint, Entity_Id, unsigned int);
+static unsigned int ceil_alignment (unsigned HOST_WIDE_INT);
+static void check_ok_for_atomic (tree, Entity_Id, bool);
+static int compatible_signatures_p (tree ftype1, tree ftype2);
+static void rest_of_type_decl_compilation_no_defer (tree);
+
+/* Return true if GNAT_ADDRESS is a compile time known value.
+   In particular catch System'To_Address.  */
+
+static bool
+compile_time_known_address_p (Node_Id gnat_address)
+{
+  return ((Nkind (gnat_address) == N_Unchecked_Type_Conversion
+	   && Compile_Time_Known_Value (Expression (gnat_address)))
+	  || Compile_Time_Known_Value (gnat_address));
+}
+
+/* Given GNAT_ENTITY, an entity in the incoming GNAT tree, return a
+   GCC type corresponding to that entity.  GNAT_ENTITY is assumed to
+   refer to an Ada type.  */
+
+tree
+gnat_to_gnu_type (Entity_Id gnat_entity)
+{
+  tree gnu_decl;
+
+  /* The back end never attempts to annotate generic types */
+  if (Is_Generic_Type (gnat_entity) && type_annotate_only)
+     return void_type_node;
+
+  /* Convert the ada entity type into a GCC TYPE_DECL node.  */
+  gnu_decl = gnat_to_gnu_entity (gnat_entity, NULL_TREE, 0);
+  gcc_assert (TREE_CODE (gnu_decl) == TYPE_DECL);
+  return TREE_TYPE (gnu_decl);
+}
+
+/* Given GNAT_ENTITY, a GNAT defining identifier node, which denotes some Ada
+   entity, this routine returns the equivalent GCC tree for that entity
+   (an ..._DECL node) and associates the ..._DECL node with the input GNAT
+   defining identifier.
+
+   If GNAT_ENTITY is a variable or a constant declaration, GNU_EXPR gives its
+   initial value (in GCC tree form). This is optional for variables.
+   For renamed entities, GNU_EXPR gives the object being renamed.
+
+   DEFINITION is nonzero if this call is intended for a definition.  This is
+   used for separate compilation where it necessary to know whether an
+   external declaration or a definition should be created if the GCC equivalent
+   was not created previously.  The value of 1 is normally used for a nonzero
+   DEFINITION, but a value of 2 is used in special circumstances, defined in
+   the code.  */
+
+tree
+gnat_to_gnu_entity (Entity_Id gnat_entity, tree gnu_expr, int definition)
+{
+  Entity_Id gnat_equiv_type = Gigi_Equivalent_Type (gnat_entity);
+  tree gnu_entity_id;
+  tree gnu_type = NULL_TREE;
+  /* Contains the gnu XXXX_DECL tree node which is equivalent to the input
+     GNAT tree. This node will be associated with the GNAT node by calling
+     the save_gnu_tree routine at the end of the `switch' statement.  */
+  tree gnu_decl = NULL_TREE;
+  /* true if we have already saved gnu_decl as a gnat association.  */
+  bool saved = false;
+  /* Nonzero if we incremented defer_incomplete_level.  */
+  bool this_deferred = false;
+  /* Nonzero if we incremented force_global.  */
+  bool this_global = false;
+  /* Nonzero if we should check to see if elaborated during processing.  */
+  bool maybe_present = false;
+  /* Nonzero if we made GNU_DECL and its type here.  */
+  bool this_made_decl = false;
+  struct attrib *attr_list = NULL;
+  bool debug_info_p = (Needs_Debug_Info (gnat_entity)
+		       || debug_info_level == DINFO_LEVEL_VERBOSE);
+  Entity_Kind kind = Ekind (gnat_entity);
+  Entity_Id gnat_temp;
+  unsigned int esize
+    = ((Known_Esize (gnat_entity)
+	&& UI_Is_In_Int_Range (Esize (gnat_entity)))
+       ? MIN (UI_To_Int (Esize (gnat_entity)),
+	      IN (kind, Float_Kind)
+	      ? fp_prec_to_size (LONG_DOUBLE_TYPE_SIZE)
+	      : IN (kind, Access_Kind) ? POINTER_SIZE * 2
+	      : LONG_LONG_TYPE_SIZE)
+       : LONG_LONG_TYPE_SIZE);
+  tree gnu_size = 0;
+  bool imported_p
+    = (Is_Imported (gnat_entity) && No (Address_Clause (gnat_entity)));
+  unsigned int align = 0;
+
+  /* Since a use of an Itype is a definition, process it as such if it
+     is not in a with'ed unit. */
+
+  if (!definition && Is_Itype (gnat_entity)
+      && !present_gnu_tree (gnat_entity)
+      && In_Extended_Main_Code_Unit (gnat_entity))
+    {
+      /* Ensure that we are in a subprogram mentioned in the Scope
+	 chain of this entity, our current scope is global,
+	 or that we encountered a task or entry (where we can't currently
+	 accurately check scoping).  */
+      if (!current_function_decl
+	  || DECL_ELABORATION_PROC_P (current_function_decl))
+	{
+	  process_type (gnat_entity);
+	  return get_gnu_tree (gnat_entity);
+	}
+
+      for (gnat_temp = Scope (gnat_entity);
+	   Present (gnat_temp); gnat_temp = Scope (gnat_temp))
+	{
+	  if (Is_Type (gnat_temp))
+	    gnat_temp = Underlying_Type (gnat_temp);
+
+	  if (Ekind (gnat_temp) == E_Subprogram_Body)
+	    gnat_temp
+	      = Corresponding_Spec (Parent (Declaration_Node (gnat_temp)));
+
+	  if (IN (Ekind (gnat_temp), Subprogram_Kind)
+	      && Present (Protected_Body_Subprogram (gnat_temp)))
+	    gnat_temp = Protected_Body_Subprogram (gnat_temp);
+
+	  if (Ekind (gnat_temp) == E_Entry
+	      || Ekind (gnat_temp) == E_Entry_Family
+	      || Ekind (gnat_temp) == E_Task_Type
+	      || (IN (Ekind (gnat_temp), Subprogram_Kind)
+		  && present_gnu_tree (gnat_temp)
+		  && (current_function_decl
+		      == gnat_to_gnu_entity (gnat_temp, NULL_TREE, 0))))
+	    {
+	      process_type (gnat_entity);
+	      return get_gnu_tree (gnat_entity);
+	    }
+	}
+
+      /* This abort means the entity "gnat_entity" has an incorrect scope,
+	 i.e. that its scope does not correspond to the subprogram in which
+	 it is declared */
+      gcc_unreachable ();
+    }
+
+  /* If this is entity 0, something went badly wrong.  */
+  gcc_assert (Present (gnat_entity));
+
+  /* If we've already processed this entity, return what we got last time.
+     If we are defining the node, we should not have already processed it.
+     In that case, we will abort below when we try to save a new GCC tree for
+     this object.   We also need to handle the case of getting a dummy type
+     when a Full_View exists.  */
+
+  if (present_gnu_tree (gnat_entity)
+      && (!definition || (Is_Type (gnat_entity) && imported_p)))
+    {
+      gnu_decl = get_gnu_tree (gnat_entity);
+
+      if (TREE_CODE (gnu_decl) == TYPE_DECL
+	  && TYPE_IS_DUMMY_P (TREE_TYPE (gnu_decl))
+	  && IN (kind, Incomplete_Or_Private_Kind)
+	  && Present (Full_View (gnat_entity)))
+	{
+	  gnu_decl = gnat_to_gnu_entity (Full_View (gnat_entity),
+					 NULL_TREE, 0);
+
+	  save_gnu_tree (gnat_entity, NULL_TREE, false);
+	  save_gnu_tree (gnat_entity, gnu_decl, false);
+	}
+
+      return gnu_decl;
+    }
+
+  /* If this is a numeric or enumeral type, or an access type, a nonzero
+     Esize must be specified unless it was specified by the programmer.  */
+  gcc_assert (!Unknown_Esize (gnat_entity)
+	      || Has_Size_Clause (gnat_entity)
+	      || (!IN (kind, Numeric_Kind) && !IN (kind, Enumeration_Kind)
+		  && (!IN (kind, Access_Kind)
+		      || kind == E_Access_Protected_Subprogram_Type
+		      || kind == E_Anonymous_Access_Protected_Subprogram_Type
+		      || kind == E_Access_Subtype)));
+
+  /* Likewise, RM_Size must be specified for all discrete and fixed-point
+     types.  */
+  gcc_assert (!IN (kind, Discrete_Or_Fixed_Point_Kind)
+	      || !Unknown_RM_Size (gnat_entity));
+
+  /* Get the name of the entity and set up the line number and filename of
+     the original definition for use in any decl we make.  */
+  gnu_entity_id = get_entity_name (gnat_entity);
+  Sloc_to_locus (Sloc (gnat_entity), &input_location);
+
+  /* If we get here, it means we have not yet done anything with this
+     entity.  If we are not defining it here, it must be external,
+     otherwise we should have defined it already.  */
+  gcc_assert (definition || Is_Public (gnat_entity) || type_annotate_only
+	      || kind == E_Discriminant || kind == E_Component
+	      || kind == E_Label
+	      || (kind == E_Constant && Present (Full_View (gnat_entity)))
+	      || IN (kind, Type_Kind));
+
+  /* For cases when we are not defining (i.e., we are referencing from
+     another compilation unit) Public entities, show we are at global level
+     for the purpose of computing scopes.  Don't do this for components or
+     discriminants since the relevant test is whether or not the record is
+     being defined.  But do this for Imported functions or procedures in
+     all cases.  */
+  if ((!definition && Is_Public (gnat_entity)
+       && !Is_Statically_Allocated (gnat_entity)
+       && kind != E_Discriminant && kind != E_Component)
+      || (Is_Imported (gnat_entity)
+	  && (kind == E_Function || kind == E_Procedure)))
+    force_global++, this_global = true;
+
+  /* Handle any attributes directly attached to the entity.  */
+  if (Has_Gigi_Rep_Item (gnat_entity))
+    prepend_attributes (gnat_entity, &attr_list);
+
+  /* Machine_Attributes on types are expected to be propagated to subtypes.
+     The corresponding Gigi_Rep_Items are only attached to the first subtype
+     though, so we handle the propagation here.  */
+  if (Is_Type (gnat_entity) && Base_Type (gnat_entity) != gnat_entity
+      && !Is_First_Subtype (gnat_entity)
+      && Has_Gigi_Rep_Item (First_Subtype (Base_Type (gnat_entity))))
+    prepend_attributes (First_Subtype (Base_Type (gnat_entity)), &attr_list);
+
+  switch (kind)
+    {
+    case E_Constant:
+      /* If this is a use of a deferred constant, get its full
+	 declaration.  */
+      if (!definition && Present (Full_View (gnat_entity)))
+	{
+	  gnu_decl = gnat_to_gnu_entity (Full_View (gnat_entity),
+					 gnu_expr, 0);
+	  saved = true;
+	  break;
+	}
+
+      /* If we have an external constant that we are not defining, get the
+	 expression that is was defined to represent.  We may throw that
+	 expression away later if it is not a constant.  Do not retrieve the
+	 expression if it is an aggregate or allocator, because in complex
+	 instantiation contexts it may not be expanded  */
+      if (!definition
+	  && Present (Expression (Declaration_Node (gnat_entity)))
+	  && !No_Initialization (Declaration_Node (gnat_entity))
+	  && (Nkind (Expression (Declaration_Node (gnat_entity)))
+	      != N_Aggregate)
+	  && (Nkind (Expression (Declaration_Node (gnat_entity)))
+	      != N_Allocator))
+	gnu_expr = gnat_to_gnu (Expression (Declaration_Node (gnat_entity)));
+
+      /* Ignore deferred constant definitions; they are processed fully in the
+	 front-end.  For deferred constant references get the full definition.
+	 On the other hand, constants that are renamings are handled like
+	 variable renamings.  If No_Initialization is set, this is not a
+	 deferred constant but a constant whose value is built manually.  */
+      if (definition && !gnu_expr
+	  && !No_Initialization (Declaration_Node (gnat_entity))
+	  && No (Renamed_Object (gnat_entity)))
+	{
+	  gnu_decl = error_mark_node;
+	  saved = true;
+	  break;
+	}
+      else if (!definition && IN (kind, Incomplete_Or_Private_Kind)
+	       && Present (Full_View (gnat_entity)))
+	{
+	  gnu_decl =  gnat_to_gnu_entity (Full_View (gnat_entity),
+					  NULL_TREE, 0);
+	  saved = true;
+	  break;
+	}
+
+      goto object;
+
+    case E_Exception:
+      /* We used to special case VMS exceptions here to directly map them to
+	 their associated condition code.  Since this code had to be masked
+	 dynamically to strip off the severity bits, this caused trouble in
+	 the GCC/ZCX case because the "type" pointers we store in the tables
+	 have to be static.  We now don't special case here anymore, and let
+	 the regular processing take place, which leaves us with a regular
+	 exception data object for VMS exceptions too.  The condition code
+	 mapping is taken care of by the front end and the bitmasking by the
+	 runtime library.   */
+      goto object;
+
+    case E_Discriminant:
+    case E_Component:
+      {
+	/* The GNAT record where the component was defined. */
+	Entity_Id gnat_record = Underlying_Type (Scope (gnat_entity));
+
+	/* If the variable is an inherited record component (in the case of
+	   extended record types), just return the inherited entity, which
+	   must be a FIELD_DECL.  Likewise for discriminants.
+	   For discriminants of untagged records which have explicit
+	   stored discriminants, return the entity for the corresponding
+	   stored discriminant.  Also use Original_Record_Component
+	   if the record has a private extension.  */
+
+	if (Present (Original_Record_Component (gnat_entity))
+	    && Original_Record_Component (gnat_entity) != gnat_entity)
+	  {
+	    gnu_decl
+	      = gnat_to_gnu_entity (Original_Record_Component (gnat_entity),
+				    gnu_expr, definition);
+	    saved = true;
+	    break;
+	  }
+
+	/* If the enclosing record has explicit stored discriminants,
+	   then it is an untagged record.  If the Corresponding_Discriminant
+	   is not empty then this must be a renamed discriminant and its
+	   Original_Record_Component must point to the corresponding explicit
+	   stored discriminant (i.e., we should have taken the previous
+	   branch).  */
+
+	else if (Present (Corresponding_Discriminant (gnat_entity))
+		 && Is_Tagged_Type (gnat_record))
+	  {
+	    /* A tagged record has no explicit stored discriminants. */
+
+	    gcc_assert (First_Discriminant (gnat_record)
+		       == First_Stored_Discriminant (gnat_record));
+	    gnu_decl
+	      = gnat_to_gnu_entity (Corresponding_Discriminant (gnat_entity),
+				    gnu_expr, definition);
+	    saved = true;
+	    break;
+	  }
+
+	else if (Present (CR_Discriminant (gnat_entity))
+		 && type_annotate_only)
+	  {
+	    gnu_decl = gnat_to_gnu_entity (CR_Discriminant (gnat_entity),
+					   gnu_expr, definition);
+	    saved = true;
+	    break;
+	  }
+
+	/* If the enclosing record has explicit stored discriminants,
+	   then it is an untagged record. If the Corresponding_Discriminant
+	   is not empty then this must be a renamed discriminant and its
+	   Original_Record_Component must point to the corresponding explicit
+	   stored discriminant (i.e., we should have taken the first
+	   branch).  */
+
+	else if (Present (Corresponding_Discriminant (gnat_entity))
+		 && (First_Discriminant (gnat_record)
+		     != First_Stored_Discriminant (gnat_record)))
+	  gcc_unreachable ();
+
+	/* Otherwise, if we are not defining this and we have no GCC type
+	   for the containing record, make one for it.  Then we should
+	   have made our own equivalent.  */
+	else if (!definition && !present_gnu_tree (gnat_record))
+	  {
+	    /* ??? If this is in a record whose scope is a protected
+	       type and we have an Original_Record_Component, use it.
+	       This is a workaround for major problems in protected type
+	       handling.  */
+	    Entity_Id Scop = Scope (Scope (gnat_entity));
+	    if ((Is_Protected_Type (Scop)
+		 || (Is_Private_Type (Scop)
+		     && Present (Full_View (Scop))
+		     && Is_Protected_Type (Full_View (Scop))))
+		&& Present (Original_Record_Component (gnat_entity)))
+	      {
+		gnu_decl
+		  = gnat_to_gnu_entity (Original_Record_Component
+					(gnat_entity),
+					gnu_expr, 0);
+		saved = true;
+		break;
+	      }
+
+	    gnat_to_gnu_entity (Scope (gnat_entity), NULL_TREE, 0);
+	    gnu_decl = get_gnu_tree (gnat_entity);
+	    saved = true;
+	    break;
+	  }
+
+	else
+	  /* Here we have no GCC type and this is a reference rather than a
+	     definition. This should never happen. Most likely the cause is a
+	     reference before declaration in the gnat tree for gnat_entity.  */
+	  gcc_unreachable ();
+      }
+
+    case E_Loop_Parameter:
+    case E_Out_Parameter:
+    case E_Variable:
+
+      /* Simple variables, loop variables, Out parameters, and exceptions.  */
+    object:
+      {
+	bool used_by_ref = false;
+	bool const_flag
+	  = ((kind == E_Constant || kind == E_Variable)
+	     && Is_True_Constant (gnat_entity)
+	     && (((Nkind (Declaration_Node (gnat_entity))
+		   == N_Object_Declaration)
+		  && Present (Expression (Declaration_Node (gnat_entity))))
+		 || Present (Renamed_Object (gnat_entity))));
+	bool inner_const_flag = const_flag;
+	bool static_p = Is_Statically_Allocated (gnat_entity);
+	bool mutable_p = false;
+	tree gnu_ext_name = NULL_TREE;
+	tree renamed_obj = NULL_TREE;
+	tree gnu_object_size;
+
+	if (Present (Renamed_Object (gnat_entity)) && !definition)
+	  {
+	    if (kind == E_Exception)
+	      gnu_expr = gnat_to_gnu_entity (Renamed_Entity (gnat_entity),
+					     NULL_TREE, 0);
+	    else
+	      gnu_expr = gnat_to_gnu (Renamed_Object (gnat_entity));
+	  }
+
+	/* Get the type after elaborating the renamed object.  */
+	gnu_type = gnat_to_gnu_type (Etype (gnat_entity));
+
+	/* For a debug renaming declaration, build a pure debug entity.  */
+	if (Present (Debug_Renaming_Link (gnat_entity)))
+	  {
+	    rtx addr;
+	    gnu_decl = build_decl (VAR_DECL, gnu_entity_id, gnu_type);
+	    /* The (MEM (CONST (0))) pattern is prescribed by STABS.  */
+	    if (global_bindings_p ())
+	      addr = gen_rtx_CONST (VOIDmode, const0_rtx);
+	    else
+	      addr = stack_pointer_rtx;
+	    SET_DECL_RTL (gnu_decl, gen_rtx_MEM (Pmode, addr));
+	    gnat_pushdecl (gnu_decl, gnat_entity);
+	    break;
+	  }
+
+	/* If this is a loop variable, its type should be the base type.
+	   This is because the code for processing a loop determines whether
+	   a normal loop end test can be done by comparing the bounds of the
+	   loop against those of the base type, which is presumed to be the
+	   size used for computation.  But this is not correct when the size
+	   of the subtype is smaller than the type.  */
+	if (kind == E_Loop_Parameter)
+	  gnu_type = get_base_type (gnu_type);
+
+	/* Reject non-renamed objects whose types are unconstrained arrays or
+	   any object whose type is a dummy type or VOID_TYPE. */
+
+	if ((TREE_CODE (gnu_type) == UNCONSTRAINED_ARRAY_TYPE
+	     && No (Renamed_Object (gnat_entity)))
+	    || TYPE_IS_DUMMY_P (gnu_type)
+	    || TREE_CODE (gnu_type) == VOID_TYPE)
+	  {
+	    gcc_assert (type_annotate_only);
+	    if (this_global)
+	      force_global--;
+	    return error_mark_node;
+	  }
+
+	/* If an alignment is specified, use it if valid.   Note that
+	   exceptions are objects but don't have alignments.  We must do this
+	   before we validate the size, since the alignment can affect the
+	   size.  */
+	if (kind != E_Exception && Known_Alignment (gnat_entity))
+	  {
+	    gcc_assert (Present (Alignment (gnat_entity)));
+	    align = validate_alignment (Alignment (gnat_entity), gnat_entity,
+					TYPE_ALIGN (gnu_type));
+	    gnu_type = maybe_pad_type (gnu_type, NULL_TREE, align, gnat_entity,
+				       "PAD", false, definition, true);
+	  }
+
+	/* If we are defining the object, see if it has a Size value and
+	   validate it if so. If we are not defining the object and a Size
+	   clause applies, simply retrieve the value. We don't want to ignore
+	   the clause and it is expected to have been validated already.  Then
+	   get the new type, if any.  */
+	if (definition)
+	  gnu_size = validate_size (Esize (gnat_entity), gnu_type,
+				    gnat_entity, VAR_DECL, false,
+				    Has_Size_Clause (gnat_entity));
+	else if (Has_Size_Clause (gnat_entity))
+	  gnu_size = UI_To_gnu (Esize (gnat_entity), bitsizetype);
+
+	if (gnu_size)
+	  {
+	    gnu_type
+	      = make_type_from_size (gnu_type, gnu_size,
+				     Has_Biased_Representation (gnat_entity));
+
+	    if (operand_equal_p (TYPE_SIZE (gnu_type), gnu_size, 0))
+	      gnu_size = NULL_TREE;
+	  }
+
+	/* If this object has self-referential size, it must be a record with
+	   a default value.  We are supposed to allocate an object of the
+	   maximum size in this case unless it is a constant with an
+	   initializing expression, in which case we can get the size from
+	   that.  Note that the resulting size may still be a variable, so
+	   this may end up with an indirect allocation.  */
+	if (No (Renamed_Object (gnat_entity))
+	    && CONTAINS_PLACEHOLDER_P (TYPE_SIZE (gnu_type)))
+	  {
+	    if (gnu_expr && kind == E_Constant)
+	      {
+		tree size = TYPE_SIZE (TREE_TYPE (gnu_expr));
+		if (CONTAINS_PLACEHOLDER_P (size))
+		  {
+		    /* If the initializing expression is itself a constant,
+		       despite having a nominal type with self-referential
+		       size, we can get the size directly from it.  */
+		    if (TREE_CODE (gnu_expr) == COMPONENT_REF
+			&& TREE_CODE (TREE_TYPE (TREE_OPERAND (gnu_expr, 0)))
+			   == RECORD_TYPE
+			&& TYPE_IS_PADDING_P
+			   (TREE_TYPE (TREE_OPERAND (gnu_expr, 0)))
+			&& TREE_CODE (TREE_OPERAND (gnu_expr, 0)) == VAR_DECL
+			&& (TREE_READONLY (TREE_OPERAND (gnu_expr, 0))
+			    || DECL_READONLY_ONCE_ELAB
+			       (TREE_OPERAND (gnu_expr, 0))))
+		      gnu_size = DECL_SIZE (TREE_OPERAND (gnu_expr, 0));
+		    else
+		      gnu_size
+			= SUBSTITUTE_PLACEHOLDER_IN_EXPR (size, gnu_expr);
+		  }
+		else
+		  gnu_size = size;
+	      }
+	    /* We may have no GNU_EXPR because No_Initialization is
+	       set even though there's an Expression.  */
+	    else if (kind == E_Constant
+		     && (Nkind (Declaration_Node (gnat_entity))
+			 == N_Object_Declaration)
+		     && Present (Expression (Declaration_Node (gnat_entity))))
+	      gnu_size
+		= TYPE_SIZE (gnat_to_gnu_type
+			     (Etype
+			      (Expression (Declaration_Node (gnat_entity)))));
+	    else
+	      {
+		gnu_size = max_size (TYPE_SIZE (gnu_type), true);
+		mutable_p = true;
+	      }
+	  }
+
+	/* If the size is zero bytes, make it one byte since some linkers have
+	   trouble with zero-sized objects.  If the object will have a
+	   template, that will make it nonzero so don't bother.  Also avoid
+	   doing that for an object renaming or an object with an address
+	   clause, as we would lose useful information on the view size
+	   (e.g. for null array slices) and we are not allocating the object
+	   here anyway.  */
+	if (((gnu_size
+	      && integer_zerop (gnu_size)
+	      && !TREE_OVERFLOW (gnu_size))
+	     || (TYPE_SIZE (gnu_type)
+		 && integer_zerop (TYPE_SIZE (gnu_type))
+		 && !TREE_OVERFLOW (TYPE_SIZE (gnu_type))))
+	    && (!Is_Constr_Subt_For_UN_Aliased (Etype (gnat_entity))
+		|| !Is_Array_Type (Etype (gnat_entity)))
+	    && !Present (Renamed_Object (gnat_entity))
+	    && !Present (Address_Clause (gnat_entity)))
+	  gnu_size = bitsize_unit_node;
+
+	/* If this is an object with no specified size and alignment, and
+	   if either it is atomic or we are not optimizing alignment for
+	   space and it is composite and not an exception, an Out parameter
+	   or a reference to another object, and the size of its type is a
+	   constant, set the alignment to the smallest one which is not
+	   smaller than the size, with an appropriate cap.  */
+	if (!gnu_size && align == 0
+	    && (Is_Atomic (gnat_entity)
+		|| (!Optimize_Alignment_Space (gnat_entity)
+		    && kind != E_Exception
+		    && kind != E_Out_Parameter
+		    && Is_Composite_Type (Etype (gnat_entity))
+		    && !Is_Constr_Subt_For_UN_Aliased (Etype (gnat_entity))
+		    && !imported_p
+		    && No (Renamed_Object (gnat_entity))
+		    && No (Address_Clause (gnat_entity))))
+	    && TREE_CODE (TYPE_SIZE (gnu_type)) == INTEGER_CST)
+	  {
+	    /* No point in jumping through all the hoops needed in order
+	       to support BIGGEST_ALIGNMENT if we don't really have to.  */
+	    unsigned int align_cap = Is_Atomic (gnat_entity)
+				     ? BIGGEST_ALIGNMENT
+				     : get_mode_alignment (word_mode);
+
+	    if (!host_integerp (TYPE_SIZE (gnu_type), 1)
+		|| compare_tree_int (TYPE_SIZE (gnu_type), align_cap) >= 0)
+	      align = align_cap;
+	    else
+	      align = ceil_alignment (tree_low_cst (TYPE_SIZE (gnu_type), 1));
+
+	    /* But make sure not to under-align the object.  */
+	    if (align <= TYPE_ALIGN (gnu_type))
+	      align = 0;
+
+	    /* And honor the minimum valid atomic alignment, if any.  */
+#ifdef MINIMUM_ATOMIC_ALIGNMENT
+	    else if (align < MINIMUM_ATOMIC_ALIGNMENT)
+	      align = MINIMUM_ATOMIC_ALIGNMENT;
+#endif
+	  }
+
+	/* If the object is set to have atomic components, find the component
+	   type and validate it.
+
+	   ??? Note that we ignore Has_Volatile_Components on objects; it's
+	   not at all clear what to do in that case. */
+
+	if (Has_Atomic_Components (gnat_entity))
+	  {
+	    tree gnu_inner = (TREE_CODE (gnu_type) == ARRAY_TYPE
+			      ? TREE_TYPE (gnu_type) : gnu_type);
+
+	    while (TREE_CODE (gnu_inner) == ARRAY_TYPE
+		   && TYPE_MULTI_ARRAY_P (gnu_inner))
+	      gnu_inner = TREE_TYPE (gnu_inner);
+
+	    check_ok_for_atomic (gnu_inner, gnat_entity, true);
+	  }
+
+	/* Now check if the type of the object allows atomic access.  Note
+	   that we must test the type, even if this object has size and
+	   alignment to allow such access, because we will be going
+	   inside the padded record to assign to the object.  We could fix
+	   this by always copying via an intermediate value, but it's not
+	   clear it's worth the effort.  */
+	if (Is_Atomic (gnat_entity))
+	  check_ok_for_atomic (gnu_type, gnat_entity, false);
+
+	/* If this is an aliased object with an unconstrained nominal subtype,
+	   make a type that includes the template.  */
+	if (Is_Constr_Subt_For_UN_Aliased (Etype (gnat_entity))
+	    && Is_Array_Type (Etype (gnat_entity))
+	    && !type_annotate_only)
+	{
+	  tree gnu_fat
+	    = TREE_TYPE (gnat_to_gnu_type (Base_Type (Etype (gnat_entity))));
+
+	  gnu_type
+	    = build_unc_object_type_from_ptr (gnu_fat, gnu_type,
+				     concat_id_with_name (gnu_entity_id,
+							  "UNC"));
+	}
+
+#ifdef MINIMUM_ATOMIC_ALIGNMENT
+	/* If the size is a constant and no alignment is specified, force
+	   the alignment to be the minimum valid atomic alignment.  The
+	   restriction on constant size avoids problems with variable-size
+	   temporaries; if the size is variable, there's no issue with
+	   atomic access.  Also don't do this for a constant, since it isn't
+	   necessary and can interfere with constant replacement.  Finally,
+	   do not do it for Out parameters since that creates an
+	   size inconsistency with In parameters.  */
+	if (align == 0 && MINIMUM_ATOMIC_ALIGNMENT > TYPE_ALIGN (gnu_type)
+	    && !FLOAT_TYPE_P (gnu_type)
+	    && !const_flag && No (Renamed_Object (gnat_entity))
+	    && !imported_p && No (Address_Clause (gnat_entity))
+	    && kind != E_Out_Parameter
+	    && (gnu_size ? TREE_CODE (gnu_size) == INTEGER_CST
+		: TREE_CODE (TYPE_SIZE (gnu_type)) == INTEGER_CST))
+	  align = MINIMUM_ATOMIC_ALIGNMENT;
+#endif
+
+	/* Make a new type with the desired size and alignment, if needed.
+	   But do not take into account alignment promotions to compute the
+	   size of the object.  */
+	gnu_object_size = gnu_size ? gnu_size : TYPE_SIZE (gnu_type);
+	if (gnu_size || align > 0)
+	  gnu_type = maybe_pad_type (gnu_type, gnu_size, align, gnat_entity,
+				     "PAD", false, definition,
+				     gnu_size ? true : false);
+
+	/* Make a volatile version of this object's type if we are to make
+	   the object volatile.  We also interpret 13.3(19) conservatively
+	   and disallow any optimizations for an object covered by it.  */
+	if ((Treat_As_Volatile (gnat_entity)
+	     || (Is_Exported (gnat_entity)
+		 /* Exclude exported constants created by the compiler,
+		    which should boil down to static dispatch tables and
+		    make it possible to put them in read-only memory.  */
+		 && (Comes_From_Source (gnat_entity) || !const_flag))
+	     || Is_Imported (gnat_entity)
+	     || Present (Address_Clause (gnat_entity)))
+	    && !TYPE_VOLATILE (gnu_type))
+	  gnu_type = build_qualified_type (gnu_type,
+					   (TYPE_QUALS (gnu_type)
+					    | TYPE_QUAL_VOLATILE));
+
+	/* If this is a renaming, avoid as much as possible to create a new
+	   object.  However, in several cases, creating it is required.
+	   This processing needs to be applied to the raw expression so
+	   as to make it more likely to rename the underlying object.  */
+	if (Present (Renamed_Object (gnat_entity)))
+	  {
+	    bool create_normal_object = false;
+
+	    /* If the renamed object had padding, strip off the reference
+	       to the inner object and reset our type.  */
+	    if ((TREE_CODE (gnu_expr) == COMPONENT_REF
+		 && TREE_CODE (TREE_TYPE (TREE_OPERAND (gnu_expr, 0)))
+		    == RECORD_TYPE
+		 && TYPE_IS_PADDING_P (TREE_TYPE (TREE_OPERAND (gnu_expr, 0))))
+		/* Strip useless conversions around the object.  */
+		|| TREE_CODE (gnu_expr) == NOP_EXPR)
+	      {
+		gnu_expr = TREE_OPERAND (gnu_expr, 0);
+		gnu_type = TREE_TYPE (gnu_expr);
+	      }
+
+	    /* Case 1: If this is a constant renaming stemming from a function
+	       call, treat it as a normal object whose initial value is what
+	       is being renamed.  RM 3.3 says that the result of evaluating a
+	       function call is a constant object.  As a consequence, it can
+	       be the inner object of a constant renaming.  In this case, the
+	       renaming must be fully instantiated, i.e. it cannot be a mere
+	       reference to (part of) an existing object.  */
+	    if (const_flag)
+	      {
+	        tree inner_object = gnu_expr;
+		while (handled_component_p (inner_object))
+		  inner_object = TREE_OPERAND (inner_object, 0);
+		if (TREE_CODE (inner_object) == CALL_EXPR)
+		  create_normal_object = true;
+	      }
+
+	    /* Otherwise, see if we can proceed with a stabilized version of
+	       the renamed entity or if we need to make a new object.  */
+	    if (!create_normal_object)
+	      {
+		tree maybe_stable_expr = NULL_TREE;
+		bool stable = false;
+
+		/* Case 2: If the renaming entity need not be materialized and
+		   the renamed expression is something we can stabilize, use
+		   that for the renaming.  At the global level, we can only do
+		   this if we know no SAVE_EXPRs need be made, because the
+		   expression we return might be used in arbitrary conditional
+		   branches so we must force the SAVE_EXPRs evaluation
+		   immediately and this requires a function context.  */
+		if (!Materialize_Entity (gnat_entity)
+		    && (!global_bindings_p ()
+			|| (staticp (gnu_expr)
+			    && !TREE_SIDE_EFFECTS (gnu_expr))))
+		  {
+		    maybe_stable_expr
+		      = maybe_stabilize_reference (gnu_expr, true, &stable);
+
+		    if (stable)
+		      {
+			gnu_decl = maybe_stable_expr;
+			/* ??? No DECL_EXPR is created so we need to mark
+			   the expression manually lest it is shared.  */
+			if (global_bindings_p ())
+			  mark_visited (&gnu_decl);
+			save_gnu_tree (gnat_entity, gnu_decl, true);
+			saved = true;
+			break;
+		      }
+
+		    /* The stabilization failed.  Keep maybe_stable_expr
+		       untouched here to let the pointer case below know
+		       about that failure.  */
+		  }
+
+		/* Case 3: If this is a constant renaming and creating a
+		   new object is allowed and cheap, treat it as a normal
+		   object whose initial value is what is being renamed.  */
+		if (const_flag && Is_Elementary_Type (Etype (gnat_entity)))
+		  ;
+
+		/* Case 4: Make this into a constant pointer to the object we
+		   are to rename and attach the object to the pointer if it is
+		   something we can stabilize.
+
+		   From the proper scope, attached objects will be referenced
+		   directly instead of indirectly via the pointer to avoid
+		   subtle aliasing problems with non-addressable entities.
+		   They have to be stable because we must not evaluate the
+		   variables in the expression every time the renaming is used.
+		   The pointer is called a "renaming" pointer in this case.
+
+		   In the rare cases where we cannot stabilize the renamed
+		   object, we just make a "bare" pointer, and the renamed
+		   entity is always accessed indirectly through it.  */
+		else
+		  {
+		    gnu_type = build_reference_type (gnu_type);
+		    inner_const_flag = TREE_READONLY (gnu_expr);
+		    const_flag = true;
+
+		    /* If the previous attempt at stabilizing failed, there
+		       is no point in trying again and we reuse the result
+		       without attaching it to the pointer.  In this case it
+		       will only be used as the initializing expression of
+		       the pointer and thus needs no special treatment with
+		       regard to multiple evaluations.  */
+		    if (maybe_stable_expr)
+		      ;
+
+		    /* Otherwise, try to stabilize and attach the expression
+		       to the pointer if the stabilization succeeds.
+
+		       Note that this might introduce SAVE_EXPRs and we don't
+		       check whether we're at the global level or not.  This
+		       is fine since we are building a pointer initializer and
+		       neither the pointer nor the initializing expression can
+		       be accessed before the pointer elaboration has taken
+		       place in a correct program.
+
+		       These SAVE_EXPRs will be evaluated at the right place
+		       by either the evaluation of the initializer for the
+		       non-global case or the elaboration code for the global
+		       case, and will be attached to the elaboration procedure
+		       in the latter case.  */
+		    else
+	 	     {
+			maybe_stable_expr
+			  = maybe_stabilize_reference (gnu_expr, true, &stable);
+
+			if (stable)
+			  renamed_obj = maybe_stable_expr;
+
+			/* Attaching is actually performed downstream, as soon
+			   as we have a VAR_DECL for the pointer we make.  */
+		      }
+
+		    gnu_expr
+		      = build_unary_op (ADDR_EXPR, gnu_type, maybe_stable_expr);
+
+		    gnu_size = NULL_TREE;
+		    used_by_ref = true;
+		  }
+	      }
+	  }
+
+	/* If this is an aliased object whose nominal subtype is unconstrained,
+	   the object is a record that contains both the template and
+	   the object.  If there is an initializer, it will have already
+	   been converted to the right type, but we need to create the
+	   template if there is no initializer.  */
+	else if (definition
+		 && TREE_CODE (gnu_type) == RECORD_TYPE
+		 && (TYPE_CONTAINS_TEMPLATE_P (gnu_type)
+		     /* Beware that padding might have been introduced
+			via maybe_pad_type above.  */
+		     || (TYPE_IS_PADDING_P (gnu_type)
+			 && TREE_CODE (TREE_TYPE (TYPE_FIELDS (gnu_type)))
+			    == RECORD_TYPE
+			 && TYPE_CONTAINS_TEMPLATE_P
+			    (TREE_TYPE (TYPE_FIELDS (gnu_type)))))
+		 && !gnu_expr)
+	  {
+	    tree template_field
+	      = TYPE_IS_PADDING_P (gnu_type)
+		? TYPE_FIELDS (TREE_TYPE (TYPE_FIELDS (gnu_type)))
+		: TYPE_FIELDS (gnu_type);
+
+	    gnu_expr
+	      = gnat_build_constructor
+	      (gnu_type,
+	       tree_cons
+	       (template_field,
+		build_template (TREE_TYPE (template_field),
+				TREE_TYPE (TREE_CHAIN (template_field)),
+				NULL_TREE),
+		NULL_TREE));
+	  }
+
+	/* Convert the expression to the type of the object except in the
+	   case where the object's type is unconstrained or the object's type
+	   is a padded record whose field is of self-referential size.  In
+	   the former case, converting will generate unnecessary evaluations
+	   of the CONSTRUCTOR to compute the size and in the latter case, we
+	   want to only copy the actual data.  */
+	if (gnu_expr
+	    && TREE_CODE (gnu_type) != UNCONSTRAINED_ARRAY_TYPE
+	    && !CONTAINS_PLACEHOLDER_P (TYPE_SIZE (gnu_type))
+	    && !(TREE_CODE (gnu_type) == RECORD_TYPE
+		 && TYPE_IS_PADDING_P (gnu_type)
+		 && (CONTAINS_PLACEHOLDER_P
+		     (TYPE_SIZE (TREE_TYPE (TYPE_FIELDS (gnu_type)))))))
+	  gnu_expr = convert (gnu_type, gnu_expr);
+
+	/* If this is a pointer and it does not have an initializing
+	   expression, initialize it to NULL, unless the object is
+	   imported.  */
+	if (definition
+	    && (POINTER_TYPE_P (gnu_type) || TYPE_FAT_POINTER_P (gnu_type))
+	    && !Is_Imported (gnat_entity) && !gnu_expr)
+	  gnu_expr = integer_zero_node;
+
+	/* If we are defining the object and it has an Address clause we must
+	   get the address expression from the saved GCC tree for the
+	   object if the object has a Freeze_Node.  Otherwise, we elaborate
+	   the address expression here since the front-end has guaranteed
+	   in that case that the elaboration has no effects.  Note that
+	   only the latter mechanism is currently in use.  */
+	if (definition && Present (Address_Clause (gnat_entity)))
+	  {
+	    tree gnu_address
+	      = (present_gnu_tree (gnat_entity) ? get_gnu_tree (gnat_entity)
+		: gnat_to_gnu (Expression (Address_Clause (gnat_entity))));
+
+	    save_gnu_tree (gnat_entity, NULL_TREE, false);
+
+	    /* Ignore the size.  It's either meaningless or was handled
+	       above.  */
+	    gnu_size = NULL_TREE;
+	    /* Convert the type of the object to a reference type that can
+	       alias everything as per 13.3(19).  */
+	    gnu_type
+	      = build_reference_type_for_mode (gnu_type, ptr_mode, true);
+	    gnu_address = convert (gnu_type, gnu_address);
+	    used_by_ref = true;
+	    const_flag = !Is_Public (gnat_entity)
+	      || compile_time_known_address_p (Expression (Address_Clause
+							   (gnat_entity)));
+
+	    /* If we don't have an initializing expression for the underlying
+	       variable, the initializing expression for the pointer is the
+	       specified address.  Otherwise, we have to make a COMPOUND_EXPR
+	       to assign both the address and the initial value.  */
+	    if (!gnu_expr)
+	      gnu_expr = gnu_address;
+	    else
+	      gnu_expr
+		= build2 (COMPOUND_EXPR, gnu_type,
+			  build_binary_op
+			  (MODIFY_EXPR, NULL_TREE,
+			   build_unary_op (INDIRECT_REF, NULL_TREE,
+					   gnu_address),
+			   gnu_expr),
+			  gnu_address);
+	  }
+
+	/* If it has an address clause and we are not defining it, mark it
+	   as an indirect object.  Likewise for Stdcall objects that are
+	   imported.  */
+	if ((!definition && Present (Address_Clause (gnat_entity)))
+	    || (Is_Imported (gnat_entity)
+		&& Has_Stdcall_Convention (gnat_entity)))
+	  {
+	    /* Convert the type of the object to a reference type that can
+	       alias everything as per 13.3(19).  */
+	    gnu_type
+	      = build_reference_type_for_mode (gnu_type, ptr_mode, true);
+	    gnu_size = NULL_TREE;
+
+	    /* No point in taking the address of an initializing expression
+	       that isn't going to be used.  */
+	    gnu_expr = NULL_TREE;
+
+	    /* If it has an address clause whose value is known at compile
+	       time, make the object a CONST_DECL.  This will avoid a
+	       useless dereference.  */
+	    if (Present (Address_Clause (gnat_entity)))
+	      {
+		Node_Id gnat_address
+		  = Expression (Address_Clause (gnat_entity));
+
+		if (compile_time_known_address_p (gnat_address))
+		  {
+		    gnu_expr = gnat_to_gnu (gnat_address);
+		    const_flag = true;
+		  }
+	      }
+
+	    used_by_ref = true;
+	  }
+
+	/* If we are at top level and this object is of variable size,
+	   make the actual type a hidden pointer to the real type and
+	   make the initializer be a memory allocation and initialization.
+	   Likewise for objects we aren't defining (presumed to be
+	   external references from other packages), but there we do
+	   not set up an initialization.
+
+	   If the object's size overflows, make an allocator too, so that
+	   Storage_Error gets raised.  Note that we will never free
+	   such memory, so we presume it never will get allocated.  */
+
+	if (!allocatable_size_p (TYPE_SIZE_UNIT (gnu_type),
+				 global_bindings_p () || !definition
+				 || static_p)
+	    || (gnu_size
+		&& ! allocatable_size_p (gnu_size,
+					 global_bindings_p () || !definition
+					 || static_p)))
+	  {
+	    gnu_type = build_reference_type (gnu_type);
+	    gnu_size = NULL_TREE;
+	    used_by_ref = true;
+	    const_flag = true;
+
+	    /* In case this was a aliased object whose nominal subtype is
+	       unconstrained, the pointer above will be a thin pointer and
+	       build_allocator will automatically make the template.
+
+	       If we have a template initializer only (that we made above),
+	       pretend there is none and rely on what build_allocator creates
+	       again anyway.  Otherwise (if we have a full initializer), get
+	       the data part and feed that to build_allocator.
+
+	       If we are elaborating a mutable object, tell build_allocator to
+	       ignore a possibly simpler size from the initializer, if any, as
+	       we must allocate the maximum possible size in this case.  */
+
+	    if (definition)
+	      {
+		tree gnu_alloc_type = TREE_TYPE (gnu_type);
+
+		if (TREE_CODE (gnu_alloc_type) == RECORD_TYPE
+		    && TYPE_CONTAINS_TEMPLATE_P (gnu_alloc_type))
+		  {
+		    gnu_alloc_type
+		      = TREE_TYPE (TREE_CHAIN (TYPE_FIELDS (gnu_alloc_type)));
+
+		    if (TREE_CODE (gnu_expr) == CONSTRUCTOR
+			&& 1 == VEC_length (constructor_elt,
+					    CONSTRUCTOR_ELTS (gnu_expr)))
+		      gnu_expr = 0;
+		    else
+		      gnu_expr
+			= build_component_ref
+			    (gnu_expr, NULL_TREE,
+			     TREE_CHAIN (TYPE_FIELDS (TREE_TYPE (gnu_expr))),
+			     false);
+		  }
+
+		if (TREE_CODE (TYPE_SIZE_UNIT (gnu_alloc_type)) == INTEGER_CST
+		    && TREE_OVERFLOW (TYPE_SIZE_UNIT (gnu_alloc_type))
+		    && !Is_Imported (gnat_entity))
+		  post_error ("?Storage_Error will be raised at run-time!",
+			      gnat_entity);
+
+		gnu_expr = build_allocator (gnu_alloc_type, gnu_expr, gnu_type,
+					    0, 0, gnat_entity, mutable_p);
+	      }
+	    else
+	      {
+		gnu_expr = NULL_TREE;
+		const_flag = false;
+	      }
+	  }
+
+	/* If this object would go into the stack and has an alignment larger
+	   than the largest stack alignment the back-end can honor, resort to
+	   a variable of "aligning type".  */
+	if (!global_bindings_p () && !static_p && definition
+	    && !imported_p && TYPE_ALIGN (gnu_type) > BIGGEST_ALIGNMENT)
+	  {
+	    /* Create the new variable.  No need for extra room before the
+	       aligned field as this is in automatic storage.  */
+	    tree gnu_new_type
+	      = make_aligning_type (gnu_type, TYPE_ALIGN (gnu_type),
+				    TYPE_SIZE_UNIT (gnu_type),
+				    BIGGEST_ALIGNMENT, 0);
+	    tree gnu_new_var
+	      = create_var_decl (create_concat_name (gnat_entity, "ALIGN"),
+				 NULL_TREE, gnu_new_type, NULL_TREE, false,
+				 false, false, false, NULL, gnat_entity);
+
+	    /* Initialize the aligned field if we have an initializer.  */
+	    if (gnu_expr)
+	      add_stmt_with_node
+		(build_binary_op (MODIFY_EXPR, NULL_TREE,
+				  build_component_ref
+				  (gnu_new_var, NULL_TREE,
+				   TYPE_FIELDS (gnu_new_type), false),
+				  gnu_expr),
+		 gnat_entity);
+
+	    /* And setup this entity as a reference to the aligned field.  */
+	    gnu_type = build_reference_type (gnu_type);
+	    gnu_expr
+	      = build_unary_op
+		(ADDR_EXPR, gnu_type,
+		 build_component_ref (gnu_new_var, NULL_TREE,
+				      TYPE_FIELDS (gnu_new_type), false));
+
+	    gnu_size = NULL_TREE;
+	    used_by_ref = true;
+	    const_flag = true;
+	  }
+
+	if (const_flag)
+	  gnu_type = build_qualified_type (gnu_type, (TYPE_QUALS (gnu_type)
+						      | TYPE_QUAL_CONST));
+
+	/* Convert the expression to the type of the object except in the
+	   case where the object's type is unconstrained or the object's type
+	   is a padded record whose field is of self-referential size.  In
+	   the former case, converting will generate unnecessary evaluations
+	   of the CONSTRUCTOR to compute the size and in the latter case, we
+	   want to only copy the actual data.  */
+	if (gnu_expr
+	    && TREE_CODE (gnu_type) != UNCONSTRAINED_ARRAY_TYPE
+	    && !CONTAINS_PLACEHOLDER_P (TYPE_SIZE (gnu_type))
+	    && !(TREE_CODE (gnu_type) == RECORD_TYPE
+		 && TYPE_IS_PADDING_P (gnu_type)
+		 && (CONTAINS_PLACEHOLDER_P
+		     (TYPE_SIZE (TREE_TYPE (TYPE_FIELDS (gnu_type)))))))
+	  gnu_expr = convert (gnu_type, gnu_expr);
+
+	/* If this name is external or there was a name specified, use it,
+	   unless this is a VMS exception object since this would conflict
+	   with the symbol we need to export in addition.  Don't use the
+	   Interface_Name if there is an address clause (see CD30005).  */
+	if (!Is_VMS_Exception (gnat_entity)
+	    && ((Present (Interface_Name (gnat_entity))
+		 && No (Address_Clause (gnat_entity)))
+		|| (Is_Public (gnat_entity)
+		    && (!Is_Imported (gnat_entity)
+			|| Is_Exported (gnat_entity)))))
+	  gnu_ext_name = create_concat_name (gnat_entity, 0);
+
+	/* If this is constant initialized to a static constant and the
+	   object has an aggregate type, force it to be statically
+	   allocated. */
+	if (const_flag && gnu_expr && TREE_CONSTANT (gnu_expr)
+	    && host_integerp (TYPE_SIZE_UNIT (gnu_type), 1)
+	    && (AGGREGATE_TYPE_P (gnu_type)
+		&& !(TREE_CODE (gnu_type) == RECORD_TYPE
+		     && TYPE_IS_PADDING_P (gnu_type))))
+	  static_p = true;
+
+	gnu_decl = create_var_decl (gnu_entity_id, gnu_ext_name, gnu_type,
+				    gnu_expr, const_flag,
+				    Is_Public (gnat_entity),
+				    imported_p || !definition,
+				    static_p, attr_list, gnat_entity);
+	DECL_BY_REF_P (gnu_decl) = used_by_ref;
+	DECL_POINTS_TO_READONLY_P (gnu_decl) = used_by_ref && inner_const_flag;
+	if (TREE_CODE (gnu_decl) == VAR_DECL && renamed_obj)
+	  {
+	    SET_DECL_RENAMED_OBJECT (gnu_decl, renamed_obj);
+	    if (global_bindings_p ())
+	      {
+		DECL_RENAMING_GLOBAL_P (gnu_decl) = 1;
+		record_global_renaming_pointer (gnu_decl);
+	      }
+	  }
+
+	if (definition && DECL_SIZE (gnu_decl)
+	    && get_block_jmpbuf_decl ()
+	    && (TREE_CODE (DECL_SIZE (gnu_decl)) != INTEGER_CST
+		|| (flag_stack_check && !STACK_CHECK_BUILTIN
+		    && 0 < compare_tree_int (DECL_SIZE_UNIT (gnu_decl),
+					     STACK_CHECK_MAX_VAR_SIZE))))
+	  add_stmt_with_node (build_call_1_expr
+			      (update_setjmp_buf_decl,
+			       build_unary_op (ADDR_EXPR, NULL_TREE,
+					       get_block_jmpbuf_decl ())),
+			      gnat_entity);
+
+	/* If this is a public constant or we're not optimizing and we're not
+	   making a VAR_DECL for it, make one just for export or debugger use.
+	   Likewise if the address is taken or if either the object or type is
+	   aliased.  Make an external declaration for a reference, unless this
+	   is a Standard entity since there no real symbol at the object level
+	   for these.  */
+	if (TREE_CODE (gnu_decl) == CONST_DECL
+	    && (definition || Sloc (gnat_entity) > Standard_Location)
+	    && ((Is_Public (gnat_entity)
+		 && !Present (Address_Clause (gnat_entity)))
+		|| optimize == 0
+		|| Address_Taken (gnat_entity)
+		|| Is_Aliased (gnat_entity)
+		|| Is_Aliased (Etype (gnat_entity))))
+	  {
+	    tree gnu_corr_var
+	      = create_true_var_decl (gnu_entity_id, gnu_ext_name, gnu_type,
+				      gnu_expr, true, Is_Public (gnat_entity),
+				      !definition, static_p, NULL,
+				      gnat_entity);
+
+	    SET_DECL_CONST_CORRESPONDING_VAR (gnu_decl, gnu_corr_var);
+
+	    /* As debugging information will be generated for the variable,
+	       do not generate information for the constant.  */
+	    DECL_IGNORED_P (gnu_decl) = true;
+	  }
+
+	/* If this is declared in a block that contains a block with an
+	   exception handler, we must force this variable in memory to
+	   suppress an invalid optimization.  */
+	if (Has_Nested_Block_With_Handler (Scope (gnat_entity))
+	    && Exception_Mechanism != Back_End_Exceptions)
+	  TREE_ADDRESSABLE (gnu_decl) = 1;
+
+	gnu_type = TREE_TYPE (gnu_decl);
+
+	/* Back-annotate Alignment and Esize of the object if not already
+	   known, except for when the object is actually a pointer to the
+	   real object, since alignment and size of a pointer don't have
+	   anything to do with those of the designated object.  Note that
+	   we pick the values of the type, not those of the object, to
+	   shield ourselves from low-level platform-dependent adjustments
+	   like alignment promotion.  This is both consistent with all the
+	   treatment above, where alignment and size are set on the type of
+	   the object and not on the object directly, and makes it possible
+	   to support confirming representation clauses in all cases.  */
+
+	if (!used_by_ref && Unknown_Alignment (gnat_entity))
+	  Set_Alignment (gnat_entity,
+			 UI_From_Int (TYPE_ALIGN (gnu_type) / BITS_PER_UNIT));
+
+	if (!used_by_ref && Unknown_Esize (gnat_entity))
+	  {
+	    if (TREE_CODE (gnu_type) == RECORD_TYPE
+		&& TYPE_CONTAINS_TEMPLATE_P (gnu_type))
+	      gnu_object_size
+		= TYPE_SIZE (TREE_TYPE (TREE_CHAIN (TYPE_FIELDS (gnu_type))));
+
+	    Set_Esize (gnat_entity, annotate_value (gnu_object_size));
+	  }
+      }
+      break;
+
+    case E_Void:
+      /* Return a TYPE_DECL for "void" that we previously made.  */
+      gnu_decl = void_type_decl_node;
+      break;
+
+    case E_Enumeration_Type:
+      /* A special case, for the types Character and Wide_Character in
+	 Standard, we do not list all the literals. So if the literals
+	 are not specified, make this an unsigned type.  */
+      if (No (First_Literal (gnat_entity)))
+	{
+	  gnu_type = make_unsigned_type (esize);
+	  TYPE_NAME (gnu_type) = gnu_entity_id;
+
+	  /* Set the TYPE_STRING_FLAG for Ada Character and
+	     Wide_Character types. This is needed by the dwarf-2 debug writer to
+	     distinguish between unsigned integer types and character types.  */
+	  TYPE_STRING_FLAG (gnu_type) = 1;
+	  break;
+	}
+
+      /* Normal case of non-character type, or non-Standard character type */
+      {
+	/* Here we have a list of enumeral constants in First_Literal.
+	   We make a CONST_DECL for each and build into GNU_LITERAL_LIST
+	   the list to be places into TYPE_FIELDS.  Each node in the list
+	   is a TREE_LIST node whose TREE_VALUE is the literal name
+	   and whose TREE_PURPOSE is the value of the literal.
+
+	   Esize contains the number of bits needed to represent the enumeral
+	   type, Type_Low_Bound also points to the first literal and
+	   Type_High_Bound points to the last literal.  */
+
+	Entity_Id gnat_literal;
+	tree gnu_literal_list = NULL_TREE;
+
+	if (Is_Unsigned_Type (gnat_entity))
+	  gnu_type = make_unsigned_type (esize);
+	else
+	  gnu_type = make_signed_type (esize);
+
+	TREE_SET_CODE (gnu_type, ENUMERAL_TYPE);
+
+	for (gnat_literal = First_Literal (gnat_entity);
+	     Present (gnat_literal);
+	     gnat_literal = Next_Literal (gnat_literal))
+	  {
+	    tree gnu_value = UI_To_gnu (Enumeration_Rep (gnat_literal),
+					gnu_type);
+	    tree gnu_literal
+	      = create_var_decl (get_entity_name (gnat_literal), NULL_TREE,
+				 gnu_type, gnu_value, true, false, false,
+				 false, NULL, gnat_literal);
+
+	    save_gnu_tree (gnat_literal, gnu_literal, false);
+	    gnu_literal_list = tree_cons (DECL_NAME (gnu_literal),
+					  gnu_value, gnu_literal_list);
+	  }
+
+	TYPE_VALUES (gnu_type) = nreverse (gnu_literal_list);
+
+	/* Note that the bounds are updated at the end of this function
+	   because to avoid an infinite recursion when we get the bounds of
+	   this type, since those bounds are objects of this type.    */
+      }
+      break;
+
+    case E_Signed_Integer_Type:
+    case E_Ordinary_Fixed_Point_Type:
+    case E_Decimal_Fixed_Point_Type:
+      /* For integer types, just make a signed type the appropriate number
+	 of bits.  */
+      gnu_type = make_signed_type (esize);
+      break;
+
+    case E_Modular_Integer_Type:
+      /* For modular types, make the unsigned type of the proper number of
+	 bits and then set up the modulus, if required.  */
+      {
+	enum machine_mode mode;
+	tree gnu_modulus;
+	tree gnu_high = 0;
+
+	if (Is_Packed_Array_Type (gnat_entity))
+	  esize = UI_To_Int (RM_Size (gnat_entity));
+
+	/* Find the smallest mode at least ESIZE bits wide and make a class
+	   using that mode.  */
+
+	for (mode = GET_CLASS_NARROWEST_MODE (MODE_INT);
+	     GET_MODE_BITSIZE (mode) < esize;
+	     mode = GET_MODE_WIDER_MODE (mode))
+	  ;
+
+	gnu_type = make_unsigned_type (GET_MODE_BITSIZE (mode));
+	TYPE_PACKED_ARRAY_TYPE_P (gnu_type)
+	  = (Is_Packed_Array_Type (gnat_entity)
+	     && Is_Bit_Packed_Array (Original_Array_Type (gnat_entity)));
+
+	/* Get the modulus in this type.  If it overflows, assume it is because
+	   it is equal to 2**Esize.  Note that there is no overflow checking
+	   done on unsigned type, so we detect the overflow by looking for
+	   a modulus of zero, which is otherwise invalid.  */
+	gnu_modulus = UI_To_gnu (Modulus (gnat_entity), gnu_type);
+
+	if (!integer_zerop (gnu_modulus))
+	  {
+	    TYPE_MODULAR_P (gnu_type) = 1;
+	    SET_TYPE_MODULUS (gnu_type, gnu_modulus);
+	    gnu_high = fold_build2 (MINUS_EXPR, gnu_type, gnu_modulus,
+				    convert (gnu_type, integer_one_node));
+	  }
+
+	/* If we have to set TYPE_PRECISION different from its natural value,
+	   make a subtype to do do.  Likewise if there is a modulus and
+	   it is not one greater than TYPE_MAX_VALUE.  */
+	if (TYPE_PRECISION (gnu_type) != esize
+	    || (TYPE_MODULAR_P (gnu_type)
+		&& !tree_int_cst_equal (TYPE_MAX_VALUE (gnu_type), gnu_high)))
+	  {
+	    tree gnu_subtype = make_node (INTEGER_TYPE);
+
+	    TYPE_NAME (gnu_type) = create_concat_name (gnat_entity, "UMT");
+	    TREE_TYPE (gnu_subtype) = gnu_type;
+	    TYPE_MIN_VALUE (gnu_subtype) = TYPE_MIN_VALUE (gnu_type);
+	    TYPE_MAX_VALUE (gnu_subtype)
+	      = TYPE_MODULAR_P (gnu_type)
+		? gnu_high : TYPE_MAX_VALUE (gnu_type);
+	    TYPE_PRECISION (gnu_subtype) = esize;
+	    TYPE_UNSIGNED (gnu_subtype) = 1;
+	    TYPE_EXTRA_SUBTYPE_P (gnu_subtype) = 1;
+	    TYPE_PACKED_ARRAY_TYPE_P (gnu_subtype)
+	      = (Is_Packed_Array_Type (gnat_entity)
+		 && Is_Bit_Packed_Array (Original_Array_Type (gnat_entity)));
+	    layout_type (gnu_subtype);
+
+	    gnu_type = gnu_subtype;
+	  }
+      }
+      break;
+
+    case E_Signed_Integer_Subtype:
+    case E_Enumeration_Subtype:
+    case E_Modular_Integer_Subtype:
+    case E_Ordinary_Fixed_Point_Subtype:
+    case E_Decimal_Fixed_Point_Subtype:
+
+      /* For integral subtypes, we make a new INTEGER_TYPE.  Note
+	 that we do not want to call build_range_type since we would
+	 like each subtype node to be distinct.  This will be important
+	 when memory aliasing is implemented.
+
+	 The TREE_TYPE field of the INTEGER_TYPE we make points to the
+	 parent type; this fact is used by the arithmetic conversion
+	 functions.
+
+	 We elaborate the Ancestor_Subtype if it is not in the current
+	 unit and one of our bounds is non-static.  We do this to ensure
+	 consistent naming in the case where several subtypes share the same
+	 bounds by always elaborating the first such subtype first, thus
+	 using its name. */
+
+      if (!definition
+	  && Present (Ancestor_Subtype (gnat_entity))
+	  && !In_Extended_Main_Code_Unit (Ancestor_Subtype (gnat_entity))
+	  && (!Compile_Time_Known_Value (Type_Low_Bound (gnat_entity))
+	      || !Compile_Time_Known_Value (Type_High_Bound (gnat_entity))))
+	gnat_to_gnu_entity (Ancestor_Subtype (gnat_entity),
+			    gnu_expr, 0);
+
+      gnu_type = make_node (INTEGER_TYPE);
+      if (Is_Packed_Array_Type (gnat_entity)
+	  && Is_Bit_Packed_Array (Original_Array_Type (gnat_entity)))
+	{
+	  esize = UI_To_Int (RM_Size (gnat_entity));
+	  TYPE_PACKED_ARRAY_TYPE_P (gnu_type) = 1;
+	}
+
+      TYPE_PRECISION (gnu_type) = esize;
+      TREE_TYPE (gnu_type) = get_unpadded_type (Etype (gnat_entity));
+
+      TYPE_MIN_VALUE (gnu_type)
+	= convert (TREE_TYPE (gnu_type),
+		   elaborate_expression (Type_Low_Bound (gnat_entity),
+					 gnat_entity,
+					 get_identifier ("L"), definition, 1,
+					 Needs_Debug_Info (gnat_entity)));
+
+      TYPE_MAX_VALUE (gnu_type)
+	= convert (TREE_TYPE (gnu_type),
+		   elaborate_expression (Type_High_Bound (gnat_entity),
+					 gnat_entity,
+					 get_identifier ("U"), definition, 1,
+					 Needs_Debug_Info (gnat_entity)));
+
+      /* One of the above calls might have caused us to be elaborated,
+	 so don't blow up if so.  */
+      if (present_gnu_tree (gnat_entity))
+	{
+	  maybe_present = true;
+	  break;
+	}
+
+      TYPE_BIASED_REPRESENTATION_P (gnu_type)
+	= Has_Biased_Representation (gnat_entity);
+
+     /* This should be an unsigned type if the lower bound is constant
+	 and non-negative or if the base type is unsigned; a signed type
+	 otherwise.    */
+      TYPE_UNSIGNED (gnu_type)
+	= (TYPE_UNSIGNED (TREE_TYPE (gnu_type))
+	   || (TREE_CODE (TYPE_MIN_VALUE (gnu_type)) == INTEGER_CST
+	       && TREE_INT_CST_HIGH (TYPE_MIN_VALUE (gnu_type)) >= 0)
+	   || TYPE_BIASED_REPRESENTATION_P (gnu_type)
+	   || Is_Unsigned_Type (gnat_entity));
+
+      layout_type (gnu_type);
+
+      /* Inherit our alias set from what we're a subtype of.  Subtypes
+	 are not different types and a pointer can designate any instance
+	 within a subtype hierarchy.  */
+      copy_alias_set (gnu_type, TREE_TYPE (gnu_type));
+
+      /* If the type we are dealing with is to represent a packed array,
+	 we need to have the bits left justified on big-endian targets
+	 and right justified on little-endian targets.  We also need to
+	 ensure that when the value is read (e.g. for comparison of two
+	 such values), we only get the good bits, since the unused bits
+	 are uninitialized.  Both goals are accomplished by wrapping the
+	 modular value in an enclosing struct.  */
+      if (Is_Packed_Array_Type (gnat_entity)
+	    && Is_Bit_Packed_Array (Original_Array_Type (gnat_entity)))
+	{
+	  tree gnu_field_type = gnu_type;
+	  tree gnu_field;
+
+	  TYPE_RM_SIZE_NUM (gnu_field_type)
+	    = UI_To_gnu (RM_Size (gnat_entity), bitsizetype);
+	  gnu_type = make_node (RECORD_TYPE);
+	  TYPE_NAME (gnu_type) = create_concat_name (gnat_entity, "JM");
+
+	  /* Propagate the alignment of the modular type to the record.
+	     This means that bitpacked arrays have "ceil" alignment for
+	     their size, which may seem counter-intuitive but makes it
+	     possible to easily overlay them on modular types.  */
+	  TYPE_ALIGN (gnu_type) = TYPE_ALIGN (gnu_field_type);
+	  TYPE_PACKED (gnu_type) = 1;
+
+	  /* Create a stripped-down declaration of the original type, mainly
+	     for debugging.  */
+	  create_type_decl (get_entity_name (gnat_entity), gnu_field_type,
+			    NULL, true, debug_info_p, gnat_entity);
+
+	  /* Don't notify the field as "addressable", since we won't be taking
+	     it's address and it would prevent create_field_decl from making a
+	     bitfield.  */
+	  gnu_field = create_field_decl (get_identifier ("OBJECT"),
+					 gnu_field_type, gnu_type, 1, 0, 0, 0);
+
+	  finish_record_type (gnu_type, gnu_field, 0, false);
+	  TYPE_JUSTIFIED_MODULAR_P (gnu_type) = 1;
+	  SET_TYPE_ADA_SIZE (gnu_type, bitsize_int (esize));
+
+	  copy_alias_set (gnu_type, gnu_field_type);
+	}
+
+      /* If the type we are dealing with has got a smaller alignment than the
+	 natural one, we need to wrap it up in a record type and under-align
+	 the latter.  We reuse the padding machinery for this purpose.  */
+      else if (Known_Alignment (gnat_entity)
+	       && UI_Is_In_Int_Range (Alignment (gnat_entity))
+	       && (align = UI_To_Int (Alignment (gnat_entity)) * BITS_PER_UNIT)
+	       && align < TYPE_ALIGN (gnu_type))
+	{
+	  tree gnu_field_type = gnu_type;
+	  tree gnu_field;
+
+	  gnu_type = make_node (RECORD_TYPE);
+	  TYPE_NAME (gnu_type) = create_concat_name (gnat_entity, "PAD");
+
+	  TYPE_ALIGN (gnu_type) = align;
+	  TYPE_PACKED (gnu_type) = 1;
+
+	  /* Create a stripped-down declaration of the original type, mainly
+	     for debugging.  */
+	  create_type_decl (get_entity_name (gnat_entity), gnu_field_type,
+			    NULL, true, debug_info_p, gnat_entity);
+
+	  /* Don't notify the field as "addressable", since we won't be taking
+	     it's address and it would prevent create_field_decl from making a
+	     bitfield.  */
+	  gnu_field = create_field_decl (get_identifier ("OBJECT"),
+					 gnu_field_type, gnu_type, 1, 0, 0, 0);
+
+	  finish_record_type (gnu_type, gnu_field, 0, false);
+	  TYPE_IS_PADDING_P (gnu_type) = 1;
+	  SET_TYPE_ADA_SIZE (gnu_type, bitsize_int (esize));
+
+	  copy_alias_set (gnu_type, gnu_field_type);
+	}
+
+      /* Otherwise reset the alignment lest we computed it above.  */
+      else
+	align = 0;
+
+      break;
+
+    case E_Floating_Point_Type:
+      /* If this is a VAX floating-point type, use an integer of the proper
+	 size.  All the operations will be handled with ASM statements.  */
+      if (Vax_Float (gnat_entity))
+	{
+	  gnu_type = make_signed_type (esize);
+	  TYPE_VAX_FLOATING_POINT_P (gnu_type) = 1;
+	  SET_TYPE_DIGITS_VALUE (gnu_type,
+				 UI_To_gnu (Digits_Value (gnat_entity),
+					    sizetype));
+	  break;
+	}
+
+      /* The type of the Low and High bounds can be our type if this is
+	 a type from Standard, so set them at the end of the function.  */
+      gnu_type = make_node (REAL_TYPE);
+      TYPE_PRECISION (gnu_type) = fp_size_to_prec (esize);
+      layout_type (gnu_type);
+      break;
+
+    case E_Floating_Point_Subtype:
+      if (Vax_Float (gnat_entity))
+	{
+	  gnu_type = gnat_to_gnu_type (Etype (gnat_entity));
+	  break;
+	}
+
+      {
+	if (!definition
+	    && Present (Ancestor_Subtype (gnat_entity))
+	    && !In_Extended_Main_Code_Unit (Ancestor_Subtype (gnat_entity))
+	    && (!Compile_Time_Known_Value (Type_Low_Bound (gnat_entity))
+		|| !Compile_Time_Known_Value (Type_High_Bound (gnat_entity))))
+	  gnat_to_gnu_entity (Ancestor_Subtype (gnat_entity),
+			      gnu_expr, 0);
+
+	gnu_type = make_node (REAL_TYPE);
+	TREE_TYPE (gnu_type) = get_unpadded_type (Etype (gnat_entity));
+	TYPE_PRECISION (gnu_type) = fp_size_to_prec (esize);
+
+	TYPE_MIN_VALUE (gnu_type)
+	  = convert (TREE_TYPE (gnu_type),
+		     elaborate_expression (Type_Low_Bound (gnat_entity),
+					   gnat_entity, get_identifier ("L"),
+					   definition, 1,
+					   Needs_Debug_Info (gnat_entity)));
+
+	TYPE_MAX_VALUE (gnu_type)
+	  = convert (TREE_TYPE (gnu_type),
+		     elaborate_expression (Type_High_Bound (gnat_entity),
+					   gnat_entity, get_identifier ("U"),
+					   definition, 1,
+					   Needs_Debug_Info (gnat_entity)));
+
+	/* One of the above calls might have caused us to be elaborated,
+	   so don't blow up if so.  */
+	if (present_gnu_tree (gnat_entity))
+	  {
+	    maybe_present = true;
+	    break;
+	  }
+
+	layout_type (gnu_type);
+
+	/* Inherit our alias set from what we're a subtype of, as for
+	   integer subtypes.  */
+	copy_alias_set (gnu_type, TREE_TYPE (gnu_type));
+      }
+    break;
+
+      /* Array and String Types and Subtypes
+
+	 Unconstrained array types are represented by E_Array_Type and
+	 constrained array types are represented by E_Array_Subtype.  There
+	 are no actual objects of an unconstrained array type; all we have
+	 are pointers to that type.
+
+	 The following fields are defined on array types and subtypes:
+
+		Component_Type     Component type of the array.
+		Number_Dimensions  Number of dimensions (an int).
+		First_Index	   Type of first index.  */
+
+    case E_String_Type:
+    case E_Array_Type:
+      {
+	tree gnu_template_fields = NULL_TREE;
+	tree gnu_template_type = make_node (RECORD_TYPE);
+	tree gnu_ptr_template = build_pointer_type (gnu_template_type);
+	tree gnu_fat_type = make_node (RECORD_TYPE);
+	int ndim = Number_Dimensions (gnat_entity);
+	int firstdim
+	  = (Convention (gnat_entity) == Convention_Fortran) ? ndim - 1 : 0;
+	int nextdim
+	  = (Convention (gnat_entity) == Convention_Fortran) ? - 1 : 1;
+	int index;
+	tree *gnu_index_types = (tree *) alloca (ndim * sizeof (tree *));
+	tree *gnu_temp_fields = (tree *) alloca (ndim * sizeof (tree *));
+	tree gnu_comp_size = 0;
+	tree gnu_max_size = size_one_node;
+	tree gnu_max_size_unit;
+	Entity_Id gnat_ind_subtype;
+	Entity_Id gnat_ind_base_subtype;
+	tree gnu_template_reference;
+	tree tem;
+
+	TYPE_NAME (gnu_template_type)
+	  = create_concat_name (gnat_entity, "XUB");
+
+	/* Make a node for the array.  If we are not defining the array
+	   suppress expanding incomplete types.  */
+	gnu_type = make_node (UNCONSTRAINED_ARRAY_TYPE);
+
+	if (!definition)
+	  defer_incomplete_level++, this_deferred = true;
+
+	/* Build the fat pointer type.  Use a "void *" object instead of
+	   a pointer to the array type since we don't have the array type
+	   yet (it will reference the fat pointer via the bounds).  */
+	tem = chainon (chainon (NULL_TREE,
+				create_field_decl (get_identifier ("P_ARRAY"),
+						   ptr_void_type_node,
+						   gnu_fat_type, 0, 0, 0, 0)),
+		       create_field_decl (get_identifier ("P_BOUNDS"),
+					  gnu_ptr_template,
+					  gnu_fat_type, 0, 0, 0, 0));
+
+	/* Make sure we can put this into a register.  */
+	TYPE_ALIGN (gnu_fat_type) = MIN (BIGGEST_ALIGNMENT, 2 * POINTER_SIZE);
+
+	/* Do not finalize this record type since the types of its fields
+	   are still incomplete at this point.  */
+	finish_record_type (gnu_fat_type, tem, 0, true);
+	TYPE_IS_FAT_POINTER_P (gnu_fat_type) = 1;
+
+	/* Build a reference to the template from a PLACEHOLDER_EXPR that
+	   is the fat pointer.  This will be used to access the individual
+	   fields once we build them.  */
+	tem = build3 (COMPONENT_REF, gnu_ptr_template,
+		      build0 (PLACEHOLDER_EXPR, gnu_fat_type),
+		      TREE_CHAIN (TYPE_FIELDS (gnu_fat_type)), NULL_TREE);
+	gnu_template_reference
+	  = build_unary_op (INDIRECT_REF, gnu_template_type, tem);
+	TREE_READONLY (gnu_template_reference) = 1;
+
+	/* Now create the GCC type for each index and add the fields for
+	   that index to the template.  */
+	for (index = firstdim, gnat_ind_subtype = First_Index (gnat_entity),
+	     gnat_ind_base_subtype
+	       = First_Index (Implementation_Base_Type (gnat_entity));
+	     index < ndim && index >= 0;
+	     index += nextdim,
+	     gnat_ind_subtype = Next_Index (gnat_ind_subtype),
+	     gnat_ind_base_subtype = Next_Index (gnat_ind_base_subtype))
+	  {
+	    char field_name[10];
+	    tree gnu_ind_subtype
+	      = get_unpadded_type (Base_Type (Etype (gnat_ind_subtype)));
+	    tree gnu_base_subtype
+	      = get_unpadded_type (Etype (gnat_ind_base_subtype));
+	    tree gnu_base_min
+	      = convert (sizetype, TYPE_MIN_VALUE (gnu_base_subtype));
+	    tree gnu_base_max
+	      = convert (sizetype, TYPE_MAX_VALUE (gnu_base_subtype));
+	    tree gnu_min_field, gnu_max_field, gnu_min, gnu_max;
+
+	    /* Make the FIELD_DECLs for the minimum and maximum of this
+	       type and then make extractions of that field from the
+	       template.  */
+	    sprintf (field_name, "LB%d", index);
+	    gnu_min_field = create_field_decl (get_identifier (field_name),
+					       gnu_ind_subtype,
+					       gnu_template_type, 0, 0, 0, 0);
+	    field_name[0] = 'U';
+	    gnu_max_field = create_field_decl (get_identifier (field_name),
+					       gnu_ind_subtype,
+					       gnu_template_type, 0, 0, 0, 0);
+
+	    Sloc_to_locus (Sloc (gnat_entity),
+			   &DECL_SOURCE_LOCATION (gnu_min_field));
+	    Sloc_to_locus (Sloc (gnat_entity),
+			   &DECL_SOURCE_LOCATION (gnu_max_field));
+	    gnu_temp_fields[index] = chainon (gnu_min_field, gnu_max_field);
+
+	    /* We can't use build_component_ref here since the template
+	       type isn't complete yet.  */
+	    gnu_min = build3 (COMPONENT_REF, gnu_ind_subtype,
+			      gnu_template_reference, gnu_min_field,
+			      NULL_TREE);
+	    gnu_max = build3 (COMPONENT_REF, gnu_ind_subtype,
+			      gnu_template_reference, gnu_max_field,
+			      NULL_TREE);
+	    TREE_READONLY (gnu_min) = TREE_READONLY (gnu_max) = 1;
+
+	    /* Make a range type with the new ranges, but using
+	       the Ada subtype.  Then we convert to sizetype.  */
+	    gnu_index_types[index]
+	      = create_index_type (convert (sizetype, gnu_min),
+				   convert (sizetype, gnu_max),
+				   build_range_type (gnu_ind_subtype,
+						     gnu_min, gnu_max),
+				   gnat_entity);
+	    /* Update the maximum size of the array, in elements. */
+	    gnu_max_size
+	      = size_binop (MULT_EXPR, gnu_max_size,
+			    size_binop (PLUS_EXPR, size_one_node,
+					size_binop (MINUS_EXPR, gnu_base_max,
+						    gnu_base_min)));
+
+	    TYPE_NAME (gnu_index_types[index])
+	      = create_concat_name (gnat_entity, field_name);
+	  }
+
+	for (index = 0; index < ndim; index++)
+	  gnu_template_fields
+	    = chainon (gnu_template_fields, gnu_temp_fields[index]);
+
+	/* Install all the fields into the template.  */
+	finish_record_type (gnu_template_type, gnu_template_fields, 0, false);
+	TYPE_READONLY (gnu_template_type) = 1;
+
+	/* Now make the array of arrays and update the pointer to the array
+	   in the fat pointer.  Note that it is the first field.  */
+	tem = gnat_to_gnu_type (Component_Type (gnat_entity));
+
+	/* Try to get a smaller form of the component if needed.  */
+	if ((Is_Packed (gnat_entity)
+	     || Has_Component_Size_Clause (gnat_entity))
+	    && !Is_Bit_Packed_Array (gnat_entity)
+	    && !Has_Aliased_Components (gnat_entity)
+	    && !Strict_Alignment (Component_Type (gnat_entity))
+	    && TREE_CODE (tem) == RECORD_TYPE
+	    && host_integerp (TYPE_SIZE (tem), 1))
+	  tem = make_packable_type (tem, false);
+
+	if (Has_Atomic_Components (gnat_entity))
+	  check_ok_for_atomic (tem, gnat_entity, true);
+
+	/* Get and validate any specified Component_Size, but if Packed,
+	   ignore it since the front end will have taken care of it. */
+	gnu_comp_size
+	  = validate_size (Component_Size (gnat_entity), tem,
+			   gnat_entity,
+			   (Is_Bit_Packed_Array (gnat_entity)
+			    ? TYPE_DECL : VAR_DECL),
+			   true, Has_Component_Size_Clause (gnat_entity));
+
+	/* If the component type is a RECORD_TYPE that has a self-referential
+	   size, use the maxium size.  */
+	if (!gnu_comp_size && TREE_CODE (tem) == RECORD_TYPE
+	    && CONTAINS_PLACEHOLDER_P (TYPE_SIZE (tem)))
+	  gnu_comp_size = max_size (TYPE_SIZE (tem), true);
+
+	if (gnu_comp_size && !Is_Bit_Packed_Array (gnat_entity))
+	  {
+	    tree orig_tem;
+	    tem = make_type_from_size (tem, gnu_comp_size, false);
+	    orig_tem = tem;
+	    tem = maybe_pad_type (tem, gnu_comp_size, 0, gnat_entity,
+				  "C_PAD", false, definition, true);
+	    /* If a padding record was made, declare it now since it will
+	       never be declared otherwise.  This is necessary to ensure
+	       that its subtrees are properly marked.  */
+	    if (tem != orig_tem)
+	      create_type_decl (TYPE_NAME (tem), tem, NULL, true, false,
+				gnat_entity);
+	  }
+
+	if (Has_Volatile_Components (gnat_entity))
+	  tem = build_qualified_type (tem,
+				      TYPE_QUALS (tem) | TYPE_QUAL_VOLATILE);
+
+	/* If Component_Size is not already specified, annotate it with the
+	   size of the component.  */
+	if (Unknown_Component_Size (gnat_entity))
+	  Set_Component_Size (gnat_entity, annotate_value (TYPE_SIZE (tem)));
+
+	gnu_max_size_unit = size_binop (MAX_EXPR, size_zero_node,
+					size_binop (MULT_EXPR, gnu_max_size,
+						    TYPE_SIZE_UNIT (tem)));
+	gnu_max_size = size_binop (MAX_EXPR, bitsize_zero_node,
+				   size_binop (MULT_EXPR,
+					       convert (bitsizetype,
+							gnu_max_size),
+					       TYPE_SIZE (tem)));
+
+	for (index = ndim - 1; index >= 0; index--)
+	  {
+	    tem = build_array_type (tem, gnu_index_types[index]);
+	    TYPE_MULTI_ARRAY_P (tem) = (index > 0);
+	    if (array_type_has_nonaliased_component (gnat_entity, tem))
+	      TYPE_NONALIASED_COMPONENT (tem) = 1;
+	  }
+
+	/* If an alignment is specified, use it if valid.  But ignore it for
+	   types that represent the unpacked base type for packed arrays.  If
+	   the alignment was requested with an explicit user alignment clause,
+	   state so.  */
+	if (No (Packed_Array_Type (gnat_entity))
+	    && Known_Alignment (gnat_entity))
+	  {
+	    gcc_assert (Present (Alignment (gnat_entity)));
+	    TYPE_ALIGN (tem)
+	      = validate_alignment (Alignment (gnat_entity), gnat_entity,
+				    TYPE_ALIGN (tem));
+	    if (Present (Alignment_Clause (gnat_entity)))
+	      TYPE_USER_ALIGN (tem) = 1;
+	  }
+
+	TYPE_CONVENTION_FORTRAN_P (tem)
+	  = (Convention (gnat_entity) == Convention_Fortran);
+	TREE_TYPE (TYPE_FIELDS (gnu_fat_type)) = build_pointer_type (tem);
+
+	/* The result type is an UNCONSTRAINED_ARRAY_TYPE that indicates the
+	   corresponding fat pointer.  */
+	TREE_TYPE (gnu_type) = TYPE_POINTER_TO (gnu_type)
+	  = TYPE_REFERENCE_TO (gnu_type) = gnu_fat_type;
+	TYPE_MODE (gnu_type) = BLKmode;
+	TYPE_ALIGN (gnu_type) = TYPE_ALIGN (tem);
+	SET_TYPE_UNCONSTRAINED_ARRAY (gnu_fat_type, gnu_type);
+
+	/* If the maximum size doesn't overflow, use it.  */
+	if (TREE_CODE (gnu_max_size) == INTEGER_CST
+	    && !TREE_OVERFLOW (gnu_max_size))
+	  TYPE_SIZE (tem)
+	    = size_binop (MIN_EXPR, gnu_max_size, TYPE_SIZE (tem));
+	if (TREE_CODE (gnu_max_size_unit) == INTEGER_CST
+	    && !TREE_OVERFLOW (gnu_max_size_unit))
+	  TYPE_SIZE_UNIT (tem)
+	    = size_binop (MIN_EXPR, gnu_max_size_unit,
+			  TYPE_SIZE_UNIT (tem));
+
+	create_type_decl (create_concat_name (gnat_entity, "XUA"),
+			  tem, NULL, !Comes_From_Source (gnat_entity),
+			  debug_info_p, gnat_entity);
+
+	/* Give the fat pointer type a name.  */
+	create_type_decl (create_concat_name (gnat_entity, "XUP"),
+			  gnu_fat_type, NULL, !Comes_From_Source (gnat_entity),
+			  debug_info_p, gnat_entity);
+
+       /* Create the type to be used as what a thin pointer designates: an
+          record type for the object and its template with the field offsets
+          shifted to have the template at a negative offset.  */
+	tem = build_unc_object_type (gnu_template_type, tem,
+				     create_concat_name (gnat_entity, "XUT"));
+	shift_unc_components_for_thin_pointers (tem);
+
+	SET_TYPE_UNCONSTRAINED_ARRAY (tem, gnu_type);
+	TYPE_OBJECT_RECORD_TYPE (gnu_type) = tem;
+
+	/* Give the thin pointer type a name.  */
+	create_type_decl (create_concat_name (gnat_entity, "XUX"),
+			  build_pointer_type (tem), NULL,
+			  !Comes_From_Source (gnat_entity), debug_info_p,
+			  gnat_entity);
+      }
+      break;
+
+    case E_String_Subtype:
+    case E_Array_Subtype:
+
+      /* This is the actual data type for array variables.  Multidimensional
+	 arrays are implemented in the gnu tree as arrays of arrays.  Note
+	 that for the moment arrays which have sparse enumeration subtypes as
+	 index components create sparse arrays, which is obviously space
+	 inefficient but so much easier to code for now.
+
+	 Also note that the subtype never refers to the unconstrained
+	 array type, which is somewhat at variance with Ada semantics.
+
+	 First check to see if this is simply a renaming of the array
+	 type.  If so, the result is the array type.  */
+
+      gnu_type = gnat_to_gnu_type (Etype (gnat_entity));
+      if (!Is_Constrained (gnat_entity))
+	break;
+      else
+	{
+	  int index;
+	  int array_dim = Number_Dimensions (gnat_entity);
+	  int first_dim
+	    = ((Convention (gnat_entity) == Convention_Fortran)
+	       ? array_dim - 1 : 0);
+	  int next_dim
+	    = (Convention (gnat_entity) == Convention_Fortran) ? -1 : 1;
+	  Entity_Id gnat_ind_subtype;
+	  Entity_Id gnat_ind_base_subtype;
+	  tree gnu_base_type = gnu_type;
+	  tree *gnu_index_type = (tree *) alloca (array_dim * sizeof (tree *));
+	  tree gnu_comp_size = NULL_TREE;
+	  tree gnu_max_size = size_one_node;
+	  tree gnu_max_size_unit;
+	  bool need_index_type_struct = false;
+	  bool max_overflow = false;
+
+	  /* First create the gnu types for each index.  Create types for
+	     debugging information to point to the index types if the
+	     are not integer types, have variable bounds, or are
+	     wider than sizetype.  */
+
+	  for (index = first_dim, gnat_ind_subtype = First_Index (gnat_entity),
+	       gnat_ind_base_subtype
+		 = First_Index (Implementation_Base_Type (gnat_entity));
+	       index < array_dim && index >= 0;
+	       index += next_dim,
+	       gnat_ind_subtype = Next_Index (gnat_ind_subtype),
+	       gnat_ind_base_subtype = Next_Index (gnat_ind_base_subtype))
+	    {
+	      tree gnu_index_subtype
+		= get_unpadded_type (Etype (gnat_ind_subtype));
+	      tree gnu_min
+		= convert (sizetype, TYPE_MIN_VALUE (gnu_index_subtype));
+	      tree gnu_max
+		= convert (sizetype, TYPE_MAX_VALUE (gnu_index_subtype));
+	      tree gnu_base_subtype
+		= get_unpadded_type (Etype (gnat_ind_base_subtype));
+	      tree gnu_base_min
+		= convert (sizetype, TYPE_MIN_VALUE (gnu_base_subtype));
+	      tree gnu_base_max
+		= convert (sizetype, TYPE_MAX_VALUE (gnu_base_subtype));
+	      tree gnu_base_type = get_base_type (gnu_base_subtype);
+	      tree gnu_base_base_min
+		= convert (sizetype, TYPE_MIN_VALUE (gnu_base_type));
+	      tree gnu_base_base_max
+		= convert (sizetype, TYPE_MAX_VALUE (gnu_base_type));
+	      tree gnu_high;
+	      tree gnu_this_max;
+
+	      /* If the minimum and maximum values both overflow in
+		 SIZETYPE, but the difference in the original type
+		 does not overflow in SIZETYPE, ignore the overflow
+		 indications.  */
+	      if ((TYPE_PRECISION (gnu_index_subtype)
+		   > TYPE_PRECISION (sizetype)
+		   || TYPE_UNSIGNED (gnu_index_subtype)
+		      != TYPE_UNSIGNED (sizetype))
+		  && TREE_CODE (gnu_min) == INTEGER_CST
+		  && TREE_CODE (gnu_max) == INTEGER_CST
+		  && TREE_OVERFLOW (gnu_min) && TREE_OVERFLOW (gnu_max)
+		  && (!TREE_OVERFLOW
+		      (fold_build2 (MINUS_EXPR, gnu_index_subtype,
+				    TYPE_MAX_VALUE (gnu_index_subtype),
+				    TYPE_MIN_VALUE (gnu_index_subtype)))))
+		{
+		  TREE_OVERFLOW (gnu_min) = 0;
+		  TREE_OVERFLOW (gnu_max) = 0;
+		}
+
+	      /* Similarly, if the range is null, use bounds of 1..0 for
+		 the sizetype bounds.  */
+	      else if ((TYPE_PRECISION (gnu_index_subtype)
+			> TYPE_PRECISION (sizetype)
+		       || TYPE_UNSIGNED (gnu_index_subtype)
+			  != TYPE_UNSIGNED (sizetype))
+		       && TREE_CODE (gnu_min) == INTEGER_CST
+		       && TREE_CODE (gnu_max) == INTEGER_CST
+		       && (TREE_OVERFLOW (gnu_min) || TREE_OVERFLOW (gnu_max))
+		       && tree_int_cst_lt (TYPE_MAX_VALUE (gnu_index_subtype),
+					   TYPE_MIN_VALUE (gnu_index_subtype)))
+		gnu_min = size_one_node, gnu_max = size_zero_node;
+
+	      /* Now compute the size of this bound.  We need to provide
+		 GCC with an upper bound to use but have to deal with the
+		 "superflat" case.  There are three ways to do this.  If we
+		 can prove that the array can never be superflat, we can
+		 just use the high bound of the index subtype.  If we can
+		 prove that the low bound minus one can't overflow, we
+		 can do this as MAX (hb, lb - 1).  Otherwise, we have to use
+		 the expression hb >= lb ? hb : lb - 1.  */
+	      gnu_high = size_binop (MINUS_EXPR, gnu_min, size_one_node);
+
+	      /* See if the base array type is already flat.  If it is, we
+		 are probably compiling an ACVC test, but it will cause the
+		 code below to malfunction if we don't handle it specially.  */
+	      if (TREE_CODE (gnu_base_min) == INTEGER_CST
+		  && TREE_CODE (gnu_base_max) == INTEGER_CST
+		  && !TREE_OVERFLOW (gnu_base_min)
+		  && !TREE_OVERFLOW (gnu_base_max)
+		  && tree_int_cst_lt (gnu_base_max, gnu_base_min))
+		gnu_high = size_zero_node, gnu_min = size_one_node;
+
+	      /* If gnu_high is now an integer which overflowed, the array
+		 cannot be superflat.  */
+	      else if (TREE_CODE (gnu_high) == INTEGER_CST
+		       && TREE_OVERFLOW (gnu_high))
+		gnu_high = gnu_max;
+	      else if (TYPE_UNSIGNED (gnu_base_subtype)
+		       || TREE_CODE (gnu_high) == INTEGER_CST)
+		gnu_high = size_binop (MAX_EXPR, gnu_max, gnu_high);
+	      else
+		gnu_high
+		  = build_cond_expr
+		    (sizetype, build_binary_op (GE_EXPR, integer_type_node,
+						gnu_max, gnu_min),
+		     gnu_max, gnu_high);
+
+	      gnu_index_type[index]
+		= create_index_type (gnu_min, gnu_high, gnu_index_subtype,
+				     gnat_entity);
+
+	      /* Also compute the maximum size of the array.  Here we
+		 see if any constraint on the index type of the base type
+		 can be used in the case of self-referential bound on
+		 the index type of the subtype.  We look for a non-"infinite"
+		 and non-self-referential bound from any type involved and
+		 handle each bound separately.  */
+
+	      if ((TREE_CODE (gnu_min) == INTEGER_CST
+		   && !TREE_OVERFLOW (gnu_min)
+		   && !operand_equal_p (gnu_min, gnu_base_base_min, 0))
+		  || !CONTAINS_PLACEHOLDER_P (gnu_min)
+		  || !(TREE_CODE (gnu_base_min) == INTEGER_CST
+		       && !TREE_OVERFLOW (gnu_base_min)))
+		gnu_base_min = gnu_min;
+
+	      if ((TREE_CODE (gnu_max) == INTEGER_CST
+		   && !TREE_OVERFLOW (gnu_max)
+		   && !operand_equal_p (gnu_max, gnu_base_base_max, 0))
+		  || !CONTAINS_PLACEHOLDER_P (gnu_max)
+		  || !(TREE_CODE (gnu_base_max) == INTEGER_CST
+		       && !TREE_OVERFLOW (gnu_base_max)))
+		gnu_base_max = gnu_max;
+
+	      if ((TREE_CODE (gnu_base_min) == INTEGER_CST
+		   && TREE_OVERFLOW (gnu_base_min))
+		  || operand_equal_p (gnu_base_min, gnu_base_base_min, 0)
+		  || (TREE_CODE (gnu_base_max) == INTEGER_CST
+		      && TREE_OVERFLOW (gnu_base_max))
+		  || operand_equal_p (gnu_base_max, gnu_base_base_max, 0))
+		max_overflow = true;
+
+	      gnu_base_min = size_binop (MAX_EXPR, gnu_base_min, gnu_min);
+	      gnu_base_max = size_binop (MIN_EXPR, gnu_base_max, gnu_max);
+
+	      gnu_this_max
+		= size_binop (MAX_EXPR,
+			      size_binop (PLUS_EXPR, size_one_node,
+					  size_binop (MINUS_EXPR, gnu_base_max,
+						      gnu_base_min)),
+			      size_zero_node);
+
+	      if (TREE_CODE (gnu_this_max) == INTEGER_CST
+		  && TREE_OVERFLOW (gnu_this_max))
+		max_overflow = true;
+
+	      gnu_max_size
+		= size_binop (MULT_EXPR, gnu_max_size, gnu_this_max);
+
+	      if (!integer_onep (TYPE_MIN_VALUE (gnu_index_subtype))
+		  || (TREE_CODE (TYPE_MAX_VALUE (gnu_index_subtype))
+		      != INTEGER_CST)
+		  || TREE_CODE (gnu_index_subtype) != INTEGER_TYPE
+		  || (TREE_TYPE (gnu_index_subtype)
+		      && (TREE_CODE (TREE_TYPE (gnu_index_subtype))
+			  != INTEGER_TYPE))
+		  || TYPE_BIASED_REPRESENTATION_P (gnu_index_subtype)
+		  || (TYPE_PRECISION (gnu_index_subtype)
+		      > TYPE_PRECISION (sizetype)))
+		need_index_type_struct = true;
+	    }
+
+	  /* Then flatten: create the array of arrays.  For an array type
+	     used to implement a packed array, get the component type from
+	     the original array type since the representation clauses that
+	     can affect it are on the latter.  */
+	  if (Is_Packed_Array_Type (gnat_entity)
+	      && !Is_Bit_Packed_Array (Original_Array_Type (gnat_entity)))
+	    {
+	      gnu_type = gnat_to_gnu_type (Original_Array_Type (gnat_entity));
+	      for (index = array_dim - 1; index >= 0; index--)
+		gnu_type = TREE_TYPE (gnu_type);
+
+	      /* One of the above calls might have caused us to be elaborated,
+		 so don't blow up if so.  */
+	      if (present_gnu_tree (gnat_entity))
+		{
+		  maybe_present = true;
+		  break;
+		}
+	    }
+	  else
+	    {
+	      gnu_type = gnat_to_gnu_type (Component_Type (gnat_entity));
+
+	      /* One of the above calls might have caused us to be elaborated,
+		 so don't blow up if so.  */
+	      if (present_gnu_tree (gnat_entity))
+		{
+		  maybe_present = true;
+		  break;
+		}
+
+	      /* Try to get a smaller form of the component if needed.  */
+	      if ((Is_Packed (gnat_entity)
+		   || Has_Component_Size_Clause (gnat_entity))
+		  && !Is_Bit_Packed_Array (gnat_entity)
+		  && !Has_Aliased_Components (gnat_entity)
+		  && !Strict_Alignment (Component_Type (gnat_entity))
+		  && TREE_CODE (gnu_type) == RECORD_TYPE
+		  && host_integerp (TYPE_SIZE (gnu_type), 1))
+		gnu_type = make_packable_type (gnu_type, false);
+
+	      /* Get and validate any specified Component_Size, but if Packed,
+		 ignore it since the front end will have taken care of it. */
+	      gnu_comp_size
+		= validate_size (Component_Size (gnat_entity), gnu_type,
+				 gnat_entity,
+				 (Is_Bit_Packed_Array (gnat_entity)
+				  ? TYPE_DECL : VAR_DECL), true,
+				 Has_Component_Size_Clause (gnat_entity));
+
+	      /* If the component type is a RECORD_TYPE that has a
+		 self-referential size, use the maxium size.  */
+	      if (!gnu_comp_size
+		  && TREE_CODE (gnu_type) == RECORD_TYPE
+		  && CONTAINS_PLACEHOLDER_P (TYPE_SIZE (gnu_type)))
+		gnu_comp_size = max_size (TYPE_SIZE (gnu_type), true);
+
+	      if (gnu_comp_size && !Is_Bit_Packed_Array (gnat_entity))
+		{
+		  tree orig_gnu_type;
+		  gnu_type
+		    = make_type_from_size (gnu_type, gnu_comp_size, false);
+		  orig_gnu_type = gnu_type;
+		  gnu_type = maybe_pad_type (gnu_type, gnu_comp_size, 0,
+					     gnat_entity, "C_PAD", false,
+					     definition, true);
+		  /* If a padding record was made, declare it now since it
+		     will never be declared otherwise.  This is necessary
+		     to ensure that its subtrees are properly marked.  */
+		  if (gnu_type != orig_gnu_type)
+		    create_type_decl (TYPE_NAME (gnu_type), gnu_type, NULL,
+				      true, false, gnat_entity);
+		}
+
+	      if (Has_Volatile_Components (Base_Type (gnat_entity)))
+		gnu_type = build_qualified_type (gnu_type,
+						 (TYPE_QUALS (gnu_type)
+						  | TYPE_QUAL_VOLATILE));
+	    }
+
+	  gnu_max_size_unit = size_binop (MULT_EXPR, gnu_max_size,
+					  TYPE_SIZE_UNIT (gnu_type));
+	  gnu_max_size = size_binop (MULT_EXPR,
+				     convert (bitsizetype, gnu_max_size),
+				     TYPE_SIZE (gnu_type));
+
+	  for (index = array_dim - 1; index >= 0; index --)
+	    {
+	      gnu_type = build_array_type (gnu_type, gnu_index_type[index]);
+	      TYPE_MULTI_ARRAY_P (gnu_type) = (index > 0);
+	      if (array_type_has_nonaliased_component (gnat_entity, gnu_type))
+		TYPE_NONALIASED_COMPONENT (gnu_type) = 1;
+	    }
+
+	  /* If we are at file level and this is a multi-dimensional array, we
+	     need to make a variable corresponding to the stride of the
+	     inner dimensions.   */
+	  if (global_bindings_p () && array_dim > 1)
+	    {
+	      tree gnu_str_name = get_identifier ("ST");
+	      tree gnu_arr_type;
+
+	      for (gnu_arr_type = TREE_TYPE (gnu_type);
+		   TREE_CODE (gnu_arr_type) == ARRAY_TYPE;
+		   gnu_arr_type = TREE_TYPE (gnu_arr_type),
+		   gnu_str_name = concat_id_with_name (gnu_str_name, "ST"))
+		{
+		  tree eltype = TREE_TYPE (gnu_arr_type);
+
+		  TYPE_SIZE (gnu_arr_type)
+		    = elaborate_expression_1 (gnat_entity, gnat_entity,
+					      TYPE_SIZE (gnu_arr_type),
+					      gnu_str_name, definition, 0);
+
+		  /* ??? For now, store the size as a multiple of the
+		     alignment of the element type in bytes so that we
+		     can see the alignment from the tree.  */
+		  TYPE_SIZE_UNIT (gnu_arr_type)
+		    = build_binary_op
+		      (MULT_EXPR, sizetype,
+		       elaborate_expression_1
+		       (gnat_entity, gnat_entity,
+			build_binary_op (EXACT_DIV_EXPR, sizetype,
+					 TYPE_SIZE_UNIT (gnu_arr_type),
+					 size_int (TYPE_ALIGN (eltype)
+						   / BITS_PER_UNIT)),
+			concat_id_with_name (gnu_str_name, "A_U"),
+			definition, 0),
+		       size_int (TYPE_ALIGN (eltype) / BITS_PER_UNIT));
+
+		  /* ??? create_type_decl is not invoked on the inner types so
+		     the MULT_EXPR node built above will never be marked.  */
+		  mark_visited (&TYPE_SIZE_UNIT (gnu_arr_type));
+		}
+	    }
+
+	  /* If we need to write out a record type giving the names of
+	     the bounds, do it now.  */
+	  if (need_index_type_struct && debug_info_p)
+	    {
+	      tree gnu_bound_rec_type = make_node (RECORD_TYPE);
+	      tree gnu_field_list = NULL_TREE;
+	      tree gnu_field;
+
+	      TYPE_NAME (gnu_bound_rec_type)
+		= create_concat_name (gnat_entity, "XA");
+
+	      for (index = array_dim - 1; index >= 0; index--)
+		{
+		  tree gnu_type_name
+		    = TYPE_NAME (TYPE_INDEX_TYPE (gnu_index_type[index]));
+
+		  if (TREE_CODE (gnu_type_name) == TYPE_DECL)
+		    gnu_type_name = DECL_NAME (gnu_type_name);
+
+		  gnu_field = create_field_decl (gnu_type_name,
+						 integer_type_node,
+						 gnu_bound_rec_type,
+						 0, NULL_TREE, NULL_TREE, 0);
+		  TREE_CHAIN (gnu_field) = gnu_field_list;
+		  gnu_field_list = gnu_field;
+		}
+
+	      finish_record_type (gnu_bound_rec_type, gnu_field_list,
+				  0, false);
+
+	      TYPE_STUB_DECL (gnu_type)
+		= build_decl (TYPE_DECL, NULL_TREE, gnu_type);
+
+	      add_parallel_type
+		(TYPE_STUB_DECL (gnu_type), gnu_bound_rec_type);
+	    }
+
+	  TYPE_CONVENTION_FORTRAN_P (gnu_type)
+	    = (Convention (gnat_entity) == Convention_Fortran);
+	  TYPE_PACKED_ARRAY_TYPE_P (gnu_type)
+	    = (Is_Packed_Array_Type (gnat_entity)
+	       && Is_Bit_Packed_Array (Original_Array_Type (gnat_entity)));
+
+	  /* If our size depends on a placeholder and the maximum size doesn't
+	     overflow, use it.  */
+	  if (CONTAINS_PLACEHOLDER_P (TYPE_SIZE (gnu_type))
+	      && !(TREE_CODE (gnu_max_size) == INTEGER_CST
+		   && TREE_OVERFLOW (gnu_max_size))
+	      && !(TREE_CODE (gnu_max_size_unit) == INTEGER_CST
+		   && TREE_OVERFLOW (gnu_max_size_unit))
+	      && !max_overflow)
+	    {
+	      TYPE_SIZE (gnu_type) = size_binop (MIN_EXPR, gnu_max_size,
+						 TYPE_SIZE (gnu_type));
+	      TYPE_SIZE_UNIT (gnu_type)
+		= size_binop (MIN_EXPR, gnu_max_size_unit,
+			      TYPE_SIZE_UNIT (gnu_type));
+	    }
+
+	  /* Set our alias set to that of our base type.  This gives all
+	     array subtypes the same alias set.  */
+	  copy_alias_set (gnu_type, gnu_base_type);
+	}
+
+      /* If this is a packed type, make this type the same as the packed
+	 array type, but do some adjusting in the type first.   */
+
+      if (Present (Packed_Array_Type (gnat_entity)))
+	{
+	  Entity_Id gnat_index;
+	  tree gnu_inner_type;
+
+	  /* First finish the type we had been making so that we output
+	     debugging information for it  */
+	  gnu_type
+	    = build_qualified_type (gnu_type,
+				    (TYPE_QUALS (gnu_type)
+				     | (TYPE_QUAL_VOLATILE
+					* Treat_As_Volatile (gnat_entity))));
+	  gnu_decl = create_type_decl (gnu_entity_id, gnu_type, attr_list,
+				       !Comes_From_Source (gnat_entity),
+				       debug_info_p, gnat_entity);
+	  if (!Comes_From_Source (gnat_entity))
+	    DECL_ARTIFICIAL (gnu_decl) = 1;
+
+	  /* Save it as our equivalent in case the call below elaborates
+	     this type again.  */
+	  save_gnu_tree (gnat_entity, gnu_decl, false);
+
+	  gnu_decl = gnat_to_gnu_entity (Packed_Array_Type (gnat_entity),
+					 NULL_TREE, 0);
+	  this_made_decl = true;
+	  gnu_type = TREE_TYPE (gnu_decl);
+	  save_gnu_tree (gnat_entity, NULL_TREE, false);
+
+	  gnu_inner_type = gnu_type;
+	  while (TREE_CODE (gnu_inner_type) == RECORD_TYPE
+		 && (TYPE_JUSTIFIED_MODULAR_P (gnu_inner_type)
+		     || TYPE_IS_PADDING_P (gnu_inner_type)))
+	    gnu_inner_type = TREE_TYPE (TYPE_FIELDS (gnu_inner_type));
+
+	  /* We need to point the type we just made to our index type so
+	     the actual bounds can be put into a template.  */
+
+	  if ((TREE_CODE (gnu_inner_type) == ARRAY_TYPE
+	       && !TYPE_ACTUAL_BOUNDS (gnu_inner_type))
+	      || (TREE_CODE (gnu_inner_type) == INTEGER_TYPE
+		  && !TYPE_HAS_ACTUAL_BOUNDS_P (gnu_inner_type)))
+	    {
+	      if (TREE_CODE (gnu_inner_type) == INTEGER_TYPE)
+		{
+		  /* The TYPE_ACTUAL_BOUNDS field is also used for the modulus.
+		     If it is, we need to make another type.  */
+		  if (TYPE_MODULAR_P (gnu_inner_type))
+		    {
+		      tree gnu_subtype;
+
+		      gnu_subtype = make_node (INTEGER_TYPE);
+
+		      TREE_TYPE (gnu_subtype) = gnu_inner_type;
+		      TYPE_MIN_VALUE (gnu_subtype)
+			= TYPE_MIN_VALUE (gnu_inner_type);
+		      TYPE_MAX_VALUE (gnu_subtype)
+			= TYPE_MAX_VALUE (gnu_inner_type);
+		      TYPE_PRECISION (gnu_subtype)
+			= TYPE_PRECISION (gnu_inner_type);
+		      TYPE_UNSIGNED (gnu_subtype)
+			= TYPE_UNSIGNED (gnu_inner_type);
+		      TYPE_EXTRA_SUBTYPE_P (gnu_subtype) = 1;
+		      layout_type (gnu_subtype);
+
+		      gnu_inner_type = gnu_subtype;
+		    }
+
+		  TYPE_HAS_ACTUAL_BOUNDS_P (gnu_inner_type) = 1;
+		}
+
+	      SET_TYPE_ACTUAL_BOUNDS (gnu_inner_type, NULL_TREE);
+
+	      for (gnat_index = First_Index (gnat_entity);
+		   Present (gnat_index); gnat_index = Next_Index (gnat_index))
+		SET_TYPE_ACTUAL_BOUNDS
+		  (gnu_inner_type,
+		   tree_cons (NULL_TREE,
+			      get_unpadded_type (Etype (gnat_index)),
+			      TYPE_ACTUAL_BOUNDS (gnu_inner_type)));
+
+	      if (Convention (gnat_entity) != Convention_Fortran)
+		SET_TYPE_ACTUAL_BOUNDS
+		  (gnu_inner_type,
+		   nreverse (TYPE_ACTUAL_BOUNDS (gnu_inner_type)));
+
+	      if (TREE_CODE (gnu_type) == RECORD_TYPE
+		  && TYPE_JUSTIFIED_MODULAR_P (gnu_type))
+		TREE_TYPE (TYPE_FIELDS (gnu_type)) = gnu_inner_type;
+	    }
+	}
+
+      /* Abort if packed array with no packed array type field set. */
+      else
+	gcc_assert (!Is_Packed (gnat_entity));
+
+      break;
+
+    case E_String_Literal_Subtype:
+      /* Create the type for a string literal. */
+      {
+	Entity_Id gnat_full_type
+	  = (IN (Ekind (Etype (gnat_entity)), Private_Kind)
+	     && Present (Full_View (Etype (gnat_entity)))
+	     ? Full_View (Etype (gnat_entity)) : Etype (gnat_entity));
+	tree gnu_string_type = get_unpadded_type (gnat_full_type);
+	tree gnu_string_array_type
+	  = TREE_TYPE (TREE_TYPE (TYPE_FIELDS (TREE_TYPE (gnu_string_type))));
+	tree gnu_string_index_type
+	  = get_base_type (TREE_TYPE (TYPE_INDEX_TYPE
+				      (TYPE_DOMAIN (gnu_string_array_type))));
+	tree gnu_lower_bound
+	  = convert (gnu_string_index_type,
+		     gnat_to_gnu (String_Literal_Low_Bound (gnat_entity)));
+	int length = UI_To_Int (String_Literal_Length (gnat_entity));
+	tree gnu_length = ssize_int (length - 1);
+	tree gnu_upper_bound
+	  = build_binary_op (PLUS_EXPR, gnu_string_index_type,
+			     gnu_lower_bound,
+			     convert (gnu_string_index_type, gnu_length));
+	tree gnu_range_type
+	  = build_range_type (gnu_string_index_type,
+			      gnu_lower_bound, gnu_upper_bound);
+	tree gnu_index_type
+	  = create_index_type (convert (sizetype,
+					TYPE_MIN_VALUE (gnu_range_type)),
+			       convert (sizetype,
+					TYPE_MAX_VALUE (gnu_range_type)),
+			       gnu_range_type, gnat_entity);
+
+	gnu_type
+	  = build_array_type (gnat_to_gnu_type (Component_Type (gnat_entity)),
+			      gnu_index_type);
+	copy_alias_set (gnu_type,  gnu_string_type);
+      }
+      break;
+
+    /* Record Types and Subtypes
+
+       The following fields are defined on record types:
+
+		Has_Discriminants	True if the record has discriminants
+		First_Discriminant      Points to head of list of discriminants
+		First_Entity		Points to head of list of fields
+		Is_Tagged_Type		True if the record is tagged
+
+       Implementation of Ada records and discriminated records:
+
+       A record type definition is transformed into the equivalent of a C
+       struct definition.  The fields that are the discriminants which are
+       found in the Full_Type_Declaration node and the elements of the
+       Component_List found in the Record_Type_Definition node.  The
+       Component_List can be a recursive structure since each Variant of
+       the Variant_Part of the Component_List has a Component_List.
+
+       Processing of a record type definition comprises starting the list of
+       field declarations here from the discriminants and the calling the
+       function components_to_record to add the rest of the fields from the
+       component list and return the gnu type node. The function
+       components_to_record will call itself recursively as it traverses
+       the tree.  */
+
+    case E_Record_Type:
+      if (Has_Complex_Representation (gnat_entity))
+	{
+	  gnu_type
+	    = build_complex_type
+	      (get_unpadded_type
+	       (Etype (Defining_Entity
+		       (First (Component_Items
+			       (Component_List
+				(Type_Definition
+				 (Declaration_Node (gnat_entity)))))))));
+
+	  break;
+	}
+
+      {
+	Node_Id full_definition = Declaration_Node (gnat_entity);
+	Node_Id record_definition = Type_Definition (full_definition);
+	Entity_Id gnat_field;
+	tree gnu_field;
+	tree gnu_field_list = NULL_TREE;
+	tree gnu_get_parent;
+	/* Set PACKED in keeping with gnat_to_gnu_field.  */
+	int packed
+	  = Is_Packed (gnat_entity)
+	    ? 1
+	    : Component_Alignment (gnat_entity) == Calign_Storage_Unit
+	      ? -1
+	      : (Known_Alignment (gnat_entity)
+		 || (Strict_Alignment (gnat_entity)
+		     && Known_Static_Esize (gnat_entity)))
+		? -2
+		: 0;
+	bool has_rep = Has_Specified_Layout (gnat_entity);
+	bool all_rep = has_rep;
+	bool is_extension
+	  = (Is_Tagged_Type (gnat_entity)
+	     && Nkind (record_definition) == N_Derived_Type_Definition);
+
+	/* See if all fields have a rep clause.  Stop when we find one
+	   that doesn't.  */
+	for (gnat_field = First_Entity (gnat_entity);
+	     Present (gnat_field) && all_rep;
+	     gnat_field = Next_Entity (gnat_field))
+	  if ((Ekind (gnat_field) == E_Component
+	       || Ekind (gnat_field) == E_Discriminant)
+	      && No (Component_Clause (gnat_field)))
+	    all_rep = false;
+
+	/* If this is a record extension, go a level further to find the
+	   record definition.  Also, verify we have a Parent_Subtype.  */
+	if (is_extension)
+	  {
+	    if (!type_annotate_only
+		|| Present (Record_Extension_Part (record_definition)))
+	      record_definition = Record_Extension_Part (record_definition);
+
+	    gcc_assert (type_annotate_only
+			|| Present (Parent_Subtype (gnat_entity)));
+	  }
+
+	/* Make a node for the record.  If we are not defining the record,
+	   suppress expanding incomplete types.  */
+	gnu_type = make_node (tree_code_for_record_type (gnat_entity));
+	TYPE_NAME (gnu_type) = gnu_entity_id;
+	TYPE_PACKED (gnu_type) = (packed != 0) || has_rep;
+
+	if (!definition)
+	  defer_incomplete_level++, this_deferred = true;
+
+	/* If both a size and rep clause was specified, put the size in
+	   the record type now so that it can get the proper mode.  */
+	if (has_rep && Known_Esize (gnat_entity))
+	  TYPE_SIZE (gnu_type) = UI_To_gnu (Esize (gnat_entity), sizetype);
+
+	/* Always set the alignment here so that it can be used to
+	   set the mode, if it is making the alignment stricter.  If
+	   it is invalid, it will be checked again below.  If this is to
+	   be Atomic, choose a default alignment of a word unless we know
+	   the size and it's smaller.  */
+	if (Known_Alignment (gnat_entity))
+	  TYPE_ALIGN (gnu_type)
+	    = validate_alignment (Alignment (gnat_entity), gnat_entity, 0);
+	else if (Is_Atomic (gnat_entity))
+	  TYPE_ALIGN (gnu_type)
+	    = esize >= BITS_PER_WORD ? BITS_PER_WORD : ceil_alignment (esize);
+	/* If a type needs strict alignment, the minimum size will be the
+	   type size instead of the RM size (see validate_size).  Cap the
+	   alignment, lest it causes this type size to become too large.  */
+	else if (Strict_Alignment (gnat_entity)
+		 && Known_Static_Esize (gnat_entity))
+	  {
+	    unsigned int raw_size = UI_To_Int (Esize (gnat_entity));
+	    unsigned int raw_align = raw_size & -raw_size;
+	    if (raw_align < BIGGEST_ALIGNMENT)
+	      TYPE_ALIGN (gnu_type) = raw_align;
+	  }
+	else
+	  TYPE_ALIGN (gnu_type) = 0;
+
+	/* If we have a Parent_Subtype, make a field for the parent.  If
+	   this record has rep clauses, force the position to zero.  */
+	if (Present (Parent_Subtype (gnat_entity)))
+	  {
+	    Entity_Id gnat_parent = Parent_Subtype (gnat_entity);
+	    tree gnu_parent;
+
+	    /* A major complexity here is that the parent subtype will
+	       reference our discriminants in its Discriminant_Constraint
+	       list.  But those must reference the parent component of this
+	       record which is of the parent subtype we have not built yet!
+	       To break the circle we first build a dummy COMPONENT_REF which
+	       represents the "get to the parent" operation and initialize
+	       each of those discriminants to a COMPONENT_REF of the above
+	       dummy parent referencing the corresponding discriminant of the
+	       base type of the parent subtype.  */
+	    gnu_get_parent = build3 (COMPONENT_REF, void_type_node,
+				     build0 (PLACEHOLDER_EXPR, gnu_type),
+				     build_decl (FIELD_DECL, NULL_TREE,
+						 void_type_node),
+				     NULL_TREE);
+
+	    if (Has_Discriminants (gnat_entity))
+	      for (gnat_field = First_Stored_Discriminant (gnat_entity);
+		   Present (gnat_field);
+		   gnat_field = Next_Stored_Discriminant (gnat_field))
+		if (Present (Corresponding_Discriminant (gnat_field)))
+		  save_gnu_tree
+		    (gnat_field,
+		     build3 (COMPONENT_REF,
+			     get_unpadded_type (Etype (gnat_field)),
+			     gnu_get_parent,
+			     gnat_to_gnu_field_decl (Corresponding_Discriminant
+						     (gnat_field)),
+			     NULL_TREE),
+		     true);
+
+	    /* Then we build the parent subtype.  */
+	    gnu_parent = gnat_to_gnu_type (gnat_parent);
+
+	    /* Finally we fix up both kinds of twisted COMPONENT_REF we have
+	       initially built.  The discriminants must reference the fields
+	       of the parent subtype and not those of its base type for the
+	       placeholder machinery to properly work.  */
+	    if (Has_Discriminants (gnat_entity))
+	      for (gnat_field = First_Stored_Discriminant (gnat_entity);
+		   Present (gnat_field);
+		   gnat_field = Next_Stored_Discriminant (gnat_field))
+		if (Present (Corresponding_Discriminant (gnat_field)))
+		  {
+		    Entity_Id field = Empty;
+		    for (field = First_Stored_Discriminant (gnat_parent);
+			 Present (field);
+			 field = Next_Stored_Discriminant (field))
+		      if (same_discriminant_p (gnat_field, field))
+			break;
+		    gcc_assert (Present (field));
+		    TREE_OPERAND (get_gnu_tree (gnat_field), 1)
+		      = gnat_to_gnu_field_decl (field);
+		  }
+
+	    /* The "get to the parent" COMPONENT_REF must be given its
+	       proper type...  */
+	    TREE_TYPE (gnu_get_parent) = gnu_parent;
+
+	    /* ...and reference the _parent field of this record.  */
+	    gnu_field_list
+	      = create_field_decl (get_identifier
+				   (Get_Name_String (Name_uParent)),
+				   gnu_parent, gnu_type, 0,
+				   has_rep ? TYPE_SIZE (gnu_parent) : 0,
+				   has_rep ? bitsize_zero_node : 0, 1);
+	    DECL_INTERNAL_P (gnu_field_list) = 1;
+	    TREE_OPERAND (gnu_get_parent, 1) = gnu_field_list;
+	  }
+
+	/* Make the fields for the discriminants and put them into the record
+	   unless it's an Unchecked_Union.  */
+	if (Has_Discriminants (gnat_entity))
+	  for (gnat_field = First_Stored_Discriminant (gnat_entity);
+	       Present (gnat_field);
+	       gnat_field = Next_Stored_Discriminant (gnat_field))
+	    {
+	      /* If this is a record extension and this discriminant
+		 is the renaming of another discriminant, we've already
+		 handled the discriminant above.  */
+	      if (Present (Parent_Subtype (gnat_entity))
+		  && Present (Corresponding_Discriminant (gnat_field)))
+		continue;
+
+	      gnu_field
+		= gnat_to_gnu_field (gnat_field, gnu_type, packed, definition);
+
+	      /* Make an expression using a PLACEHOLDER_EXPR from the
+		 FIELD_DECL node just created and link that with the
+		 corresponding GNAT defining identifier.  Then add to the
+		 list of fields.  */
+	      save_gnu_tree (gnat_field,
+			     build3 (COMPONENT_REF, TREE_TYPE (gnu_field),
+				     build0 (PLACEHOLDER_EXPR,
+					     DECL_CONTEXT (gnu_field)),
+				     gnu_field, NULL_TREE),
+			     true);
+
+	      if (!Is_Unchecked_Union (gnat_entity))
+		{
+		  TREE_CHAIN (gnu_field) = gnu_field_list;
+		  gnu_field_list = gnu_field;
+		}
+	    }
+
+	/* Put the discriminants into the record (backwards), so we can
+	   know the appropriate discriminant to use for the names of the
+	   variants.  */
+	TYPE_FIELDS (gnu_type) = gnu_field_list;
+
+	/* Add the listed fields into the record and finish it up.  */
+	components_to_record (gnu_type, Component_List (record_definition),
+			      gnu_field_list, packed, definition, NULL,
+			      false, all_rep, false,
+			      Is_Unchecked_Union (gnat_entity));
+
+	/* We used to remove the associations of the discriminants and
+	   _Parent for validity checking, but we may need them if there's
+	   Freeze_Node for a subtype used in this record.  */
+	TYPE_VOLATILE (gnu_type) = Treat_As_Volatile (gnat_entity);
+	TYPE_BY_REFERENCE_P (gnu_type) = Is_By_Reference_Type (gnat_entity);
+
+	/* If it is a tagged record force the type to BLKmode to insure
+	   that these objects will always be placed in memory. Do the
+	   same thing for limited record types. */
+	if (Is_Tagged_Type (gnat_entity) || Is_Limited_Record (gnat_entity))
+	  TYPE_MODE (gnu_type) = BLKmode;
+
+	/* If this is a derived type, we must make the alias set of this type
+	   the same as that of the type we are derived from.  We assume here
+	   that the other type is already frozen. */
+	if (Etype (gnat_entity) != gnat_entity
+	    && !(Is_Private_Type (Etype (gnat_entity))
+		 && Full_View (Etype (gnat_entity)) == gnat_entity))
+	  copy_alias_set (gnu_type, gnat_to_gnu_type (Etype (gnat_entity)));
+
+	/* Fill in locations of fields.  */
+	annotate_rep (gnat_entity, gnu_type);
+
+	/* If there are any entities in the chain corresponding to
+	   components that we did not elaborate, ensure we elaborate their
+	   types if they are Itypes.  */
+	for (gnat_temp = First_Entity (gnat_entity);
+	     Present (gnat_temp); gnat_temp = Next_Entity (gnat_temp))
+	  if ((Ekind (gnat_temp) == E_Component
+	       || Ekind (gnat_temp) == E_Discriminant)
+	      && Is_Itype (Etype (gnat_temp))
+	      && !present_gnu_tree (gnat_temp))
+	    gnat_to_gnu_entity (Etype (gnat_temp), NULL_TREE, 0);
+      }
+      break;
+
+    case E_Class_Wide_Subtype:
+      /* If an equivalent type is present, that is what we should use.
+	 Otherwise, fall through to handle this like a record subtype
+	 since it may have constraints.  */
+      if (gnat_equiv_type != gnat_entity)
+	{
+	  gnu_decl = gnat_to_gnu_entity (gnat_equiv_type, NULL_TREE, 0);
+	  maybe_present = true;
+	  break;
+	}
+
+      /* ... fall through ... */
+
+    case E_Record_Subtype:
+
+      /* If Cloned_Subtype is Present it means this record subtype has
+	 identical layout to that type or subtype and we should use
+	 that GCC type for this one.  The front end guarantees that
+	 the component list is shared.  */
+      if (Present (Cloned_Subtype (gnat_entity)))
+	{
+	  gnu_decl = gnat_to_gnu_entity (Cloned_Subtype (gnat_entity),
+					 NULL_TREE, 0);
+	  maybe_present = true;
+	}
+
+      /* Otherwise, first ensure the base type is elaborated.  Then, if we are
+	 changing the type, make a new type with each field having the
+	 type of the field in the new subtype but having the position
+	 computed by transforming every discriminant reference according
+	 to the constraints.  We don't see any difference between
+	 private and nonprivate type here since derivations from types should
+	 have been deferred until the completion of the private type.  */
+      else
+	{
+	  Entity_Id gnat_base_type = Implementation_Base_Type (gnat_entity);
+	  tree gnu_base_type;
+	  tree gnu_orig_type;
+
+	  if (!definition)
+	    defer_incomplete_level++, this_deferred = true;
+
+	  /* Get the base type initially for its alignment and sizes.  But
+	     if it is a padded type, we do all the other work with the
+	     unpadded type.  */
+	  gnu_base_type = gnat_to_gnu_type (gnat_base_type);
+
+	  if (TREE_CODE (gnu_base_type) == RECORD_TYPE
+	      && TYPE_IS_PADDING_P (gnu_base_type))
+	    gnu_type = gnu_orig_type = TREE_TYPE (TYPE_FIELDS (gnu_base_type));
+	  else
+	    gnu_type = gnu_orig_type = gnu_base_type;
+
+	  if (present_gnu_tree (gnat_entity))
+	    {
+	      maybe_present = true;
+	      break;
+	    }
+
+	  /* When the type has discriminants, and these discriminants
+	     affect the shape of what it built, factor them in.
+
+	     If we are making a subtype of an Unchecked_Union (must be an
+	     Itype), just return the type.
+
+	     We can't just use Is_Constrained because private subtypes without
+	     discriminants of full types with discriminants with default
+	     expressions are Is_Constrained but aren't constrained!  */
+
+	  if (IN (Ekind (gnat_base_type), Record_Kind)
+	      && !Is_For_Access_Subtype (gnat_entity)
+	      && !Is_Unchecked_Union (gnat_base_type)
+	      && Is_Constrained (gnat_entity)
+	      && Stored_Constraint (gnat_entity) != No_Elist
+	      && Present (Discriminant_Constraint (gnat_entity)))
+	    {
+	      Entity_Id gnat_field;
+	      tree gnu_field_list = 0;
+	      tree gnu_pos_list
+		= compute_field_positions (gnu_orig_type, NULL_TREE,
+					   size_zero_node, bitsize_zero_node,
+					   BIGGEST_ALIGNMENT);
+	      tree gnu_subst_list
+		= substitution_list (gnat_entity, gnat_base_type, NULL_TREE,
+				     definition);
+	      tree gnu_temp;
+
+	      gnu_type = make_node (RECORD_TYPE);
+	      TYPE_NAME (gnu_type) = gnu_entity_id;
+	      TYPE_VOLATILE (gnu_type) = Treat_As_Volatile (gnat_entity);
+
+	      /* Set the size, alignment and alias set of the new type to
+		 match that of the old one, doing required substitutions.
+		 We do it this early because we need the size of the new
+		 type below to discard old fields if necessary.  */
+	      TYPE_SIZE (gnu_type) = TYPE_SIZE (gnu_base_type);
+	      TYPE_SIZE_UNIT (gnu_type) = TYPE_SIZE_UNIT (gnu_base_type);
+	      SET_TYPE_ADA_SIZE (gnu_type, TYPE_ADA_SIZE (gnu_base_type));
+	      TYPE_ALIGN (gnu_type) = TYPE_ALIGN (gnu_base_type);
+	      copy_alias_set (gnu_type, gnu_base_type);
+
+	      if (CONTAINS_PLACEHOLDER_P (TYPE_SIZE (gnu_type)))
+		for (gnu_temp = gnu_subst_list;
+		     gnu_temp; gnu_temp = TREE_CHAIN (gnu_temp))
+		  TYPE_SIZE (gnu_type)
+		    = substitute_in_expr (TYPE_SIZE (gnu_type),
+					  TREE_PURPOSE (gnu_temp),
+					  TREE_VALUE (gnu_temp));
+
+	      if (CONTAINS_PLACEHOLDER_P (TYPE_SIZE_UNIT (gnu_type)))
+		for (gnu_temp = gnu_subst_list;
+		     gnu_temp; gnu_temp = TREE_CHAIN (gnu_temp))
+		  TYPE_SIZE_UNIT (gnu_type)
+		    = substitute_in_expr (TYPE_SIZE_UNIT (gnu_type),
+					  TREE_PURPOSE (gnu_temp),
+					  TREE_VALUE (gnu_temp));
+
+	      if (CONTAINS_PLACEHOLDER_P (TYPE_ADA_SIZE (gnu_type)))
+		for (gnu_temp = gnu_subst_list;
+		     gnu_temp; gnu_temp = TREE_CHAIN (gnu_temp))
+		  SET_TYPE_ADA_SIZE
+		    (gnu_type, substitute_in_expr (TYPE_ADA_SIZE (gnu_type),
+						   TREE_PURPOSE (gnu_temp),
+						   TREE_VALUE (gnu_temp)));
+
+	      for (gnat_field = First_Entity (gnat_entity);
+		   Present (gnat_field); gnat_field = Next_Entity (gnat_field))
+		if ((Ekind (gnat_field) == E_Component
+		     || Ekind (gnat_field) == E_Discriminant)
+		    && (Underlying_Type (Scope (Original_Record_Component
+						(gnat_field)))
+			== gnat_base_type)
+		    && (No (Corresponding_Discriminant (gnat_field))
+			|| !Is_Tagged_Type (gnat_base_type)))
+		  {
+		    tree gnu_old_field
+		      = gnat_to_gnu_field_decl (Original_Record_Component
+						(gnat_field));
+		    tree gnu_offset
+		      = TREE_VALUE (purpose_member (gnu_old_field,
+						    gnu_pos_list));
+		    tree gnu_pos = TREE_PURPOSE (gnu_offset);
+		    tree gnu_bitpos = TREE_VALUE (TREE_VALUE (gnu_offset));
+		    tree gnu_field_type
+		      = gnat_to_gnu_type (Etype (gnat_field));
+		    tree gnu_size = TYPE_SIZE (gnu_field_type);
+		    tree gnu_new_pos = NULL_TREE;
+		    unsigned int offset_align
+		      = tree_low_cst (TREE_PURPOSE (TREE_VALUE (gnu_offset)),
+				      1);
+		    tree gnu_field;
+
+		    /* If there was a component clause, the field types must be
+		       the same for the type and subtype, so copy the data from
+		       the old field to avoid recomputation here.  Also if the
+		       field is justified modular and the optimization in
+		       gnat_to_gnu_field was applied.  */
+		    if (Present (Component_Clause
+				 (Original_Record_Component (gnat_field)))
+			|| (TREE_CODE (gnu_field_type) == RECORD_TYPE
+			    && TYPE_JUSTIFIED_MODULAR_P (gnu_field_type)
+			    && TREE_TYPE (TYPE_FIELDS (gnu_field_type))
+			       == TREE_TYPE (gnu_old_field)))
+		      {
+			gnu_size = DECL_SIZE (gnu_old_field);
+			gnu_field_type = TREE_TYPE (gnu_old_field);
+		      }
+
+		    /* If the old field was packed and of constant size, we
+		       have to get the old size here, as it might differ from
+		       what the Etype conveys and the latter might overlap
+		       onto the following field.  Try to arrange the type for
+		       possible better packing along the way.  */
+		    else if (DECL_PACKED (gnu_old_field)
+			     && TREE_CODE (DECL_SIZE (gnu_old_field))
+			        == INTEGER_CST)
+		      {
+			gnu_size = DECL_SIZE (gnu_old_field);
+			if (TYPE_MODE (gnu_field_type) == BLKmode
+			    && TREE_CODE (gnu_field_type) == RECORD_TYPE
+			    && host_integerp (TYPE_SIZE (gnu_field_type), 1))
+			  gnu_field_type
+			    = make_packable_type (gnu_field_type, true);
+		      }
+
+		    if (CONTAINS_PLACEHOLDER_P (gnu_pos))
+		      for (gnu_temp = gnu_subst_list;
+			   gnu_temp; gnu_temp = TREE_CHAIN (gnu_temp))
+			gnu_pos = substitute_in_expr (gnu_pos,
+						      TREE_PURPOSE (gnu_temp),
+						      TREE_VALUE (gnu_temp));
+
+		    /* If the position is now a constant, we can set it as the
+		       position of the field when we make it.  Otherwise, we need
+		       to deal with it specially below.  */
+		    if (TREE_CONSTANT (gnu_pos))
+		      {
+		        gnu_new_pos = bit_from_pos (gnu_pos, gnu_bitpos);
+
+			/* Discard old fields that are outside the new type.
+			   This avoids confusing code scanning it to decide
+			   how to pass it to functions on some platforms.   */
+			if (TREE_CODE (gnu_new_pos) == INTEGER_CST
+			    && TREE_CODE (TYPE_SIZE (gnu_type)) == INTEGER_CST
+			    && !integer_zerop (gnu_size)
+			    && !tree_int_cst_lt (gnu_new_pos,
+						 TYPE_SIZE (gnu_type)))
+			  continue;
+		      }
+
+		    gnu_field
+		      = create_field_decl
+			(DECL_NAME (gnu_old_field), gnu_field_type, gnu_type,
+			 DECL_PACKED (gnu_old_field), gnu_size, gnu_new_pos,
+			 !DECL_NONADDRESSABLE_P (gnu_old_field));
+
+		    if (!TREE_CONSTANT (gnu_pos))
+		      {
+			normalize_offset (&gnu_pos, &gnu_bitpos, offset_align);
+			DECL_FIELD_OFFSET (gnu_field) = gnu_pos;
+			DECL_FIELD_BIT_OFFSET (gnu_field) = gnu_bitpos;
+			SET_DECL_OFFSET_ALIGN (gnu_field, offset_align);
+			DECL_SIZE (gnu_field) = gnu_size;
+			DECL_SIZE_UNIT (gnu_field)
+			  = convert (sizetype,
+				     size_binop (CEIL_DIV_EXPR, gnu_size,
+						 bitsize_unit_node));
+			layout_decl (gnu_field, DECL_OFFSET_ALIGN (gnu_field));
+		      }
+
+		    DECL_INTERNAL_P (gnu_field)
+		      = DECL_INTERNAL_P (gnu_old_field);
+		    SET_DECL_ORIGINAL_FIELD
+		      (gnu_field, (DECL_ORIGINAL_FIELD (gnu_old_field)
+				   ? DECL_ORIGINAL_FIELD (gnu_old_field)
+				   : gnu_old_field));
+		    DECL_DISCRIMINANT_NUMBER (gnu_field)
+		      = DECL_DISCRIMINANT_NUMBER (gnu_old_field);
+		    TREE_THIS_VOLATILE (gnu_field)
+		      = TREE_THIS_VOLATILE (gnu_old_field);
+		    TREE_CHAIN (gnu_field) = gnu_field_list;
+		    gnu_field_list = gnu_field;
+		    save_gnu_tree (gnat_field, gnu_field, false);
+		  }
+
+	      /* Now go through the entities again looking for Itypes that
+		 we have not elaborated but should (e.g., Etypes of fields
+		 that have Original_Components).  */
+	      for (gnat_field = First_Entity (gnat_entity);
+		   Present (gnat_field); gnat_field = Next_Entity (gnat_field))
+		if ((Ekind (gnat_field) == E_Discriminant
+		     || Ekind (gnat_field) == E_Component)
+		    && !present_gnu_tree (Etype (gnat_field)))
+		  gnat_to_gnu_entity (Etype (gnat_field), NULL_TREE, 0);
+
+	      /* Do not finalize it since we're going to modify it below.  */
+	      gnu_field_list = nreverse (gnu_field_list);
+	      finish_record_type (gnu_type, gnu_field_list, 2, true);
+
+	      /* Finalize size and mode.  */
+	      TYPE_SIZE (gnu_type) = variable_size (TYPE_SIZE (gnu_type));
+	      TYPE_SIZE_UNIT (gnu_type)
+		= variable_size (TYPE_SIZE_UNIT (gnu_type));
+
+	      compute_record_mode (gnu_type);
+
+	      /* Fill in locations of fields.  */
+	      annotate_rep (gnat_entity, gnu_type);
+
+	      /* We've built a new type, make an XVS type to show what this
+		 is a subtype of.  Some debuggers require the XVS type to be
+		 output first, so do it in that order.  */
+	      if (debug_info_p)
+		{
+		  tree gnu_subtype_marker = make_node (RECORD_TYPE);
+		  tree gnu_orig_name = TYPE_NAME (gnu_orig_type);
+
+		  if (TREE_CODE (gnu_orig_name) == TYPE_DECL)
+		    gnu_orig_name = DECL_NAME (gnu_orig_name);
+
+		  TYPE_NAME (gnu_subtype_marker)
+		    = create_concat_name (gnat_entity, "XVS");
+		  finish_record_type (gnu_subtype_marker,
+				      create_field_decl (gnu_orig_name,
+							 integer_type_node,
+							 gnu_subtype_marker,
+							 0, NULL_TREE,
+							 NULL_TREE, 0),
+				      0, false);
+
+		  add_parallel_type (TYPE_STUB_DECL (gnu_type),
+				     gnu_subtype_marker);
+		}
+
+	      /* Now we can finalize it.  */
+	      rest_of_record_type_compilation (gnu_type);
+	    }
+
+	  /* Otherwise, go down all the components in the new type and
+	     make them equivalent to those in the base type.  */
+	  else
+	    for (gnat_temp = First_Entity (gnat_entity); Present (gnat_temp);
+		 gnat_temp = Next_Entity (gnat_temp))
+	      if ((Ekind (gnat_temp) == E_Discriminant
+		   && !Is_Unchecked_Union (gnat_base_type))
+		  || Ekind (gnat_temp) == E_Component)
+		save_gnu_tree (gnat_temp,
+			       gnat_to_gnu_field_decl
+			       (Original_Record_Component (gnat_temp)), false);
+	}
+      break;
+
+    case E_Access_Subprogram_Type:
+      /* Use the special descriptor type for dispatch tables if needed,
+	 that is to say for the Prim_Ptr of a-tags.ads and its clones.
+	 Note that we are only required to do so for static tables in
+	 order to be compatible with the C++ ABI, but Ada 2005 allows
+	 to extend library level tagged types at the local level so
+	 we do it in the non-static case as well.  */
+      if (TARGET_VTABLE_USES_DESCRIPTORS
+	  && Is_Dispatch_Table_Entity (gnat_entity))
+	{
+	    gnu_type = fdesc_type_node;
+	    gnu_size = TYPE_SIZE (gnu_type);
+	    break;
+	}
+
+      /* ... fall through ... */
+
+    case E_Anonymous_Access_Subprogram_Type:
+      /* If we are not defining this entity, and we have incomplete
+	 entities being processed above us, make a dummy type and
+	 fill it in later.  */
+      if (!definition && defer_incomplete_level != 0)
+	{
+	  struct incomplete *p
+	    = (struct incomplete *) xmalloc (sizeof (struct incomplete));
+
+	  gnu_type
+	    = build_pointer_type
+	      (make_dummy_type (Directly_Designated_Type (gnat_entity)));
+	  gnu_decl = create_type_decl (gnu_entity_id, gnu_type, attr_list,
+				       !Comes_From_Source (gnat_entity),
+				       debug_info_p, gnat_entity);
+	  this_made_decl = true;
+	  gnu_type = TREE_TYPE (gnu_decl);
+	  save_gnu_tree (gnat_entity, gnu_decl, false);
+	  saved = true;
+
+	  p->old_type = TREE_TYPE (gnu_type);
+	  p->full_type = Directly_Designated_Type (gnat_entity);
+	  p->next = defer_incomplete_list;
+	  defer_incomplete_list = p;
+	  break;
+	}
+
+      /* ... fall through ... */
+
+    case E_Allocator_Type:
+    case E_Access_Type:
+    case E_Access_Attribute_Type:
+    case E_Anonymous_Access_Type:
+    case E_General_Access_Type:
+      {
+	Entity_Id gnat_desig_type = Directly_Designated_Type (gnat_entity);
+	Entity_Id gnat_desig_equiv = Gigi_Equivalent_Type (gnat_desig_type);
+	bool is_from_limited_with
+	  = (IN (Ekind (gnat_desig_equiv), Incomplete_Kind)
+	     && From_With_Type (gnat_desig_equiv));
+
+	/* Get the "full view" of this entity.  If this is an incomplete
+	   entity from a limited with, treat its non-limited view as the full
+	   view.  Otherwise, if this is an incomplete or private type, use the
+	   full view.  In the former case, we might point to a private type,
+	   in which case, we need its full view.  Also, we want to look at the
+	   actual type used for the representation, so this takes a total of
+	   three steps.  */
+	Entity_Id gnat_desig_full_direct_first
+	  = (is_from_limited_with ? Non_Limited_View (gnat_desig_equiv)
+	     : (IN (Ekind (gnat_desig_equiv), Incomplete_Or_Private_Kind)
+		? Full_View (gnat_desig_equiv) : Empty));
+	Entity_Id gnat_desig_full_direct
+	  = ((is_from_limited_with
+	      && Present (gnat_desig_full_direct_first)
+	      && IN (Ekind (gnat_desig_full_direct_first), Private_Kind))
+	     ? Full_View (gnat_desig_full_direct_first)
+	     : gnat_desig_full_direct_first);
+	Entity_Id gnat_desig_full
+	  = Gigi_Equivalent_Type (gnat_desig_full_direct);
+
+	/* This the type actually used to represent the designated type,
+	   either gnat_desig_full or gnat_desig_equiv.  */
+	Entity_Id gnat_desig_rep;
+
+	/* Nonzero if this is a pointer to an unconstrained array.  */
+	bool is_unconstrained_array;
+
+	/* We want to know if we'll be seeing the freeze node for any
+	   incomplete type we may be pointing to.  */
+	bool in_main_unit
+	  = (Present (gnat_desig_full)
+	     ? In_Extended_Main_Code_Unit (gnat_desig_full)
+	     : In_Extended_Main_Code_Unit (gnat_desig_type));
+
+	/* Nonzero if we make a dummy type here.  */
+	bool got_fat_p = false;
+	/* Nonzero if the dummy is a fat pointer. */
+	bool made_dummy = false;
+	tree gnu_desig_type = NULL_TREE;
+	enum machine_mode p_mode = mode_for_size (esize, MODE_INT, 0);
+
+	if (!targetm.valid_pointer_mode (p_mode))
+	  p_mode = ptr_mode;
+
+	/* If either the designated type or its full view is an unconstrained
+	   array subtype, replace it with the type it's a subtype of.  This
+	   avoids problems with multiple copies of unconstrained array types.
+	   Likewise, if the designated type is a subtype of an incomplete
+	   record type, use the parent type to avoid order of elaboration
+	   issues.  This can lose some code efficiency, but there is no
+	   alternative.  */
+	if (Ekind (gnat_desig_equiv) == E_Array_Subtype
+	    && ! Is_Constrained (gnat_desig_equiv))
+	  gnat_desig_equiv = Etype (gnat_desig_equiv);
+	if (Present (gnat_desig_full)
+	    && ((Ekind (gnat_desig_full) == E_Array_Subtype
+		 && ! Is_Constrained (gnat_desig_full))
+		|| (Ekind (gnat_desig_full) == E_Record_Subtype
+		    && Ekind (Etype (gnat_desig_full)) == E_Record_Type)))
+	  gnat_desig_full = Etype (gnat_desig_full);
+
+	/* Now set the type that actually marks the representation of
+	   the designated type and also flag whether we have a unconstrained
+	   array.  */
+	gnat_desig_rep = gnat_desig_full ? gnat_desig_full : gnat_desig_equiv;
+	is_unconstrained_array
+	  = (Is_Array_Type (gnat_desig_rep)
+	     && ! Is_Constrained (gnat_desig_rep));
+
+	/* If we are pointing to an incomplete type whose completion is an
+	   unconstrained array, make a fat pointer type.  The two types in our
+	   fields will be pointers to dummy nodes and will be replaced in
+	   update_pointer_to.  Similarly, if the type itself is a dummy type or
+	   an unconstrained array.  Also make a dummy TYPE_OBJECT_RECORD_TYPE
+	   in case we have any thin pointers to it.  */
+	if (is_unconstrained_array
+	    && (Present (gnat_desig_full)
+		|| (present_gnu_tree (gnat_desig_equiv)
+		    && TYPE_IS_DUMMY_P (TREE_TYPE
+					(get_gnu_tree (gnat_desig_equiv))))
+		|| (No (gnat_desig_full) && ! in_main_unit
+		    && defer_incomplete_level != 0
+		    && ! present_gnu_tree (gnat_desig_equiv))
+		|| (in_main_unit && is_from_limited_with
+		    && Present (Freeze_Node (gnat_desig_rep)))))
+  	  {
+	    tree gnu_old
+	      = (present_gnu_tree (gnat_desig_rep)
+		 ? TREE_TYPE (get_gnu_tree (gnat_desig_rep))
+		 : make_dummy_type (gnat_desig_rep));
+	    tree fields;
+
+	    /* Show the dummy we get will be a fat pointer.  */
+	    got_fat_p = made_dummy = true;
+
+	    /* If the call above got something that has a pointer, that
+	       pointer is our type.  This could have happened either
+	       because the type was elaborated or because somebody
+	       else executed the code below.  */
+	    gnu_type = TYPE_POINTER_TO (gnu_old);
+	    if (!gnu_type)
+	      {
+		tree gnu_template_type = make_node (ENUMERAL_TYPE);
+		tree gnu_ptr_template = build_pointer_type (gnu_template_type);
+		tree gnu_array_type = make_node (ENUMERAL_TYPE);
+		tree gnu_ptr_array = build_pointer_type (gnu_array_type);
+
+		TYPE_NAME (gnu_template_type)
+		  = concat_id_with_name (get_entity_name (gnat_desig_equiv),
+					 "XUB");
+		TYPE_DUMMY_P (gnu_template_type) = 1;
+
+		TYPE_NAME (gnu_array_type)
+		  = concat_id_with_name (get_entity_name (gnat_desig_equiv),
+					 "XUA");
+		TYPE_DUMMY_P (gnu_array_type) = 1;
+
+		gnu_type = make_node (RECORD_TYPE);
+		SET_TYPE_UNCONSTRAINED_ARRAY (gnu_type, gnu_old);
+		TYPE_POINTER_TO (gnu_old) = gnu_type;
+
+		Sloc_to_locus (Sloc (gnat_entity), &input_location);
+		fields
+		  = chainon (chainon (NULL_TREE,
+				      create_field_decl
+				      (get_identifier ("P_ARRAY"),
+				       gnu_ptr_array,
+				       gnu_type, 0, 0, 0, 0)),
+			     create_field_decl (get_identifier ("P_BOUNDS"),
+						gnu_ptr_template,
+						gnu_type, 0, 0, 0, 0));
+
+		/* Make sure we can place this into a register.  */
+		TYPE_ALIGN (gnu_type)
+		  = MIN (BIGGEST_ALIGNMENT, 2 * POINTER_SIZE);
+		TYPE_IS_FAT_POINTER_P (gnu_type) = 1;
+
+		/* Do not finalize this record type since the types of
+		   its fields are incomplete.  */
+		finish_record_type (gnu_type, fields, 0, true);
+
+		TYPE_OBJECT_RECORD_TYPE (gnu_old) = make_node (RECORD_TYPE);
+		TYPE_NAME (TYPE_OBJECT_RECORD_TYPE (gnu_old))
+		  = concat_id_with_name (get_entity_name (gnat_desig_equiv),
+					 "XUT");
+		TYPE_DUMMY_P (TYPE_OBJECT_RECORD_TYPE (gnu_old)) = 1;
+	      }
+	  }
+
+	/* If we already know what the full type is, use it.  */
+	else if (Present (gnat_desig_full)
+		 && present_gnu_tree (gnat_desig_full))
+	  gnu_desig_type = TREE_TYPE (get_gnu_tree (gnat_desig_full));
+
+	/* Get the type of the thing we are to point to and build a pointer
+	   to it.  If it is a reference to an incomplete or private type with a
+	   full view that is a record, make a dummy type node and get the
+	   actual type later when we have verified it is safe.  */
+	else if ((! in_main_unit
+		  && ! present_gnu_tree (gnat_desig_equiv)
+		  && Present (gnat_desig_full)
+		  && ! present_gnu_tree (gnat_desig_full)
+		  && Is_Record_Type (gnat_desig_full))
+		 /* Likewise if we are pointing to a record or array and we
+		    are to defer elaborating incomplete types.  We do this
+		    since this access type may be the full view of some
+		    private type.  Note that the unconstrained array case is
+		    handled above. */
+		 || ((! in_main_unit || imported_p)
+		     && defer_incomplete_level != 0
+		     && ! present_gnu_tree (gnat_desig_equiv)
+		     && ((Is_Record_Type (gnat_desig_rep)
+			  || Is_Array_Type (gnat_desig_rep))))
+		 /* If this is a reference from a limited_with type back to our
+		    main unit and there's a Freeze_Node for it, either we have
+		    already processed the declaration and made the dummy type,
+		    in which case we just reuse the latter, or we have not yet,
+		    in which case we make the dummy type and it will be reused
+		    when the declaration is processed.  In both cases, the
+		    pointer eventually created below will be automatically
+		    adjusted when the Freeze_Node is processed.  Note that the
+		    unconstrained array case is handled above. */
+		 ||  (in_main_unit && is_from_limited_with
+		      && Present (Freeze_Node (gnat_desig_rep))))
+	  {
+	    gnu_desig_type = make_dummy_type (gnat_desig_equiv);
+	    made_dummy = true;
+	  }
+
+	/* Otherwise handle the case of a pointer to itself.  */
+	else if (gnat_desig_equiv == gnat_entity)
+	  {
+	    gnu_type
+	      = build_pointer_type_for_mode (void_type_node, p_mode,
+					     No_Strict_Aliasing (gnat_entity));
+	    TREE_TYPE (gnu_type) = TYPE_POINTER_TO (gnu_type) = gnu_type;
+	  }
+
+	/* If expansion is disabled, the equivalent type of a concurrent
+	   type is absent, so build a dummy pointer type.  */
+	else if (type_annotate_only && No (gnat_desig_equiv))
+	  gnu_type = ptr_void_type_node;
+
+	/* Finally, handle the straightforward case where we can just
+	   elaborate our designated type and point to it.  */
+	else
+	  gnu_desig_type = gnat_to_gnu_type (gnat_desig_equiv);
+
+	/* It is possible that a call to gnat_to_gnu_type above resolved our
+	   type.  If so, just return it.  */
+	if (present_gnu_tree (gnat_entity))
+	  {
+	    maybe_present = true;
+	    break;
+	  }
+
+	/* If we have a GCC type for the designated type, possibly modify it
+	   if we are pointing only to constant objects and then make a pointer
+	   to it.  Don't do this for unconstrained arrays.  */
+	if (!gnu_type && gnu_desig_type)
+	  {
+	    if (Is_Access_Constant (gnat_entity)
+		&& TREE_CODE (gnu_desig_type) != UNCONSTRAINED_ARRAY_TYPE)
+	      {
+		gnu_desig_type
+		  = build_qualified_type
+		    (gnu_desig_type,
+		     TYPE_QUALS (gnu_desig_type) | TYPE_QUAL_CONST);
+
+		/* Some extra processing is required if we are building a
+		   pointer to an incomplete type (in the GCC sense). We might
+		   have such a type if we just made a dummy, or directly out
+		   of the call to gnat_to_gnu_type above if we are processing
+		   an access type for a record component designating the
+		   record type itself.  */
+		if (TYPE_MODE (gnu_desig_type) == VOIDmode)
+		  {
+		    /* We must ensure that the pointer to variant we make will
+		       be processed by update_pointer_to when the initial type
+		       is completed. Pretend we made a dummy and let further
+		       processing act as usual.  */
+		    made_dummy = true;
+
+		    /* We must ensure that update_pointer_to will not retrieve
+		       the dummy variant when building a properly qualified
+		       version of the complete type. We take advantage of the
+		       fact that get_qualified_type is requiring TYPE_NAMEs to
+		       match to influence build_qualified_type and then also
+		       update_pointer_to here. */
+		    TYPE_NAME (gnu_desig_type)
+		      = create_concat_name (gnat_desig_type, "INCOMPLETE_CST");
+		  }
+	      }
+
+	    gnu_type
+	      = build_pointer_type_for_mode (gnu_desig_type, p_mode,
+					     No_Strict_Aliasing (gnat_entity));
+	  }
+
+	/* If we are not defining this object and we made a dummy pointer,
+	   save our current definition, evaluate the actual type, and replace
+	   the tentative type we made with the actual one.  If we are to defer
+	   actually looking up the actual type, make an entry in the
+	   deferred list.  If this is from a limited with, we have to defer
+	   to the end of the current spec in two cases: first if the
+	   designated type is in the current unit and second if the access
+	   type is.  */
+	if ((! in_main_unit || is_from_limited_with) && made_dummy)
+	  {
+	    tree gnu_old_type
+	      = TYPE_FAT_POINTER_P (gnu_type)
+		? TYPE_UNCONSTRAINED_ARRAY (gnu_type) : TREE_TYPE (gnu_type);
+
+	    if (esize == POINTER_SIZE
+		&& (got_fat_p || TYPE_FAT_POINTER_P (gnu_type)))
+	      gnu_type
+		= build_pointer_type
+		  (TYPE_OBJECT_RECORD_TYPE
+		   (TYPE_UNCONSTRAINED_ARRAY (gnu_type)));
+
+	    gnu_decl = create_type_decl (gnu_entity_id, gnu_type, attr_list,
+					 !Comes_From_Source (gnat_entity),
+					 debug_info_p, gnat_entity);
+	    this_made_decl = true;
+	    gnu_type = TREE_TYPE (gnu_decl);
+	    save_gnu_tree (gnat_entity, gnu_decl, false);
+	    saved = true;
+
+	    if (defer_incomplete_level == 0
+		&& ! (is_from_limited_with
+		      && (in_main_unit
+			  || In_Extended_Main_Code_Unit (gnat_entity))))
+	      update_pointer_to (TYPE_MAIN_VARIANT (gnu_old_type),
+				 gnat_to_gnu_type (gnat_desig_equiv));
+
+	      /* Note that the call to gnat_to_gnu_type here might have
+		 updated gnu_old_type directly, in which case it is not a
+		 dummy type any more when we get into update_pointer_to.
+
+		 This may happen for instance when the designated type is a
+		 record type, because their elaboration starts with an
+		 initial node from make_dummy_type, which may yield the same
+		 node as the one we got.
+
+		 Besides, variants of this non-dummy type might have been
+		 created along the way. update_pointer_to is expected to
+		 properly take care of those situations.  */
+	    else
+	      {
+		struct incomplete *p
+		  = (struct incomplete *) xmalloc (sizeof
+						   (struct incomplete));
+		struct incomplete **head
+		  = (is_from_limited_with
+		     && (in_main_unit
+			 || In_Extended_Main_Code_Unit (gnat_entity))
+		     ? &defer_limited_with : &defer_incomplete_list);
+
+		p->old_type = gnu_old_type;
+		p->full_type = gnat_desig_equiv;
+		p->next = *head;
+		*head = p;
+	      }
+	  }
+      }
+      break;
+
+    case E_Access_Protected_Subprogram_Type:
+    case E_Anonymous_Access_Protected_Subprogram_Type:
+      if (type_annotate_only && No (gnat_equiv_type))
+	gnu_type = ptr_void_type_node;
+      else
+	{
+	  /* The runtime representation is the equivalent type. */
+	  gnu_type = gnat_to_gnu_type (gnat_equiv_type);
+	  maybe_present = 1;
+	}
+
+      if (Is_Itype (Directly_Designated_Type (gnat_entity))
+	  && !present_gnu_tree (Directly_Designated_Type (gnat_entity))
+	  && No (Freeze_Node (Directly_Designated_Type (gnat_entity)))
+	  && !Is_Record_Type (Scope (Directly_Designated_Type (gnat_entity))))
+	gnat_to_gnu_entity (Directly_Designated_Type (gnat_entity),
+			    NULL_TREE, 0);
+
+      break;
+
+    case E_Access_Subtype:
+
+      /* We treat this as identical to its base type; any constraint is
+	 meaningful only to the front end.
+
+	 The designated type must be elaborated as well, if it does
+	 not have its own freeze node. Designated (sub)types created
+	 for constrained components of records with discriminants are
+	 not frozen by the front end and thus not elaborated by gigi,
+	 because their use may appear before the base type is frozen,
+	 and because it is not clear that they are needed anywhere in
+	 Gigi. With the current model, there is no correct place where
+	 they could be elaborated.  */
+
+      gnu_type = gnat_to_gnu_type (Etype (gnat_entity));
+      if (Is_Itype (Directly_Designated_Type (gnat_entity))
+	  && !present_gnu_tree (Directly_Designated_Type (gnat_entity))
+	  && Is_Frozen (Directly_Designated_Type (gnat_entity))
+	  && No (Freeze_Node (Directly_Designated_Type (gnat_entity))))
+	{
+	  /* If we are not defining this entity, and we have incomplete
+	     entities being processed above us, make a dummy type and
+	     elaborate it later.  */
+	  if (!definition && defer_incomplete_level != 0)
+	    {
+	      struct incomplete *p
+		= (struct incomplete *) xmalloc (sizeof (struct incomplete));
+	      tree gnu_ptr_type
+		= build_pointer_type
+		  (make_dummy_type (Directly_Designated_Type (gnat_entity)));
+
+	      p->old_type = TREE_TYPE (gnu_ptr_type);
+	      p->full_type = Directly_Designated_Type (gnat_entity);
+	      p->next = defer_incomplete_list;
+	      defer_incomplete_list = p;
+	    }
+	  else if (!IN (Ekind (Base_Type
+			      (Directly_Designated_Type (gnat_entity))),
+		       Incomplete_Or_Private_Kind))
+	    gnat_to_gnu_entity (Directly_Designated_Type (gnat_entity),
+				NULL_TREE, 0);
+	}
+
+      maybe_present = true;
+      break;
+
+    /* Subprogram Entities
+
+       The following access functions are defined for subprograms (functions
+       or procedures):
+
+		First_Formal	The first formal parameter.
+		Is_Imported     Indicates that the subprogram has appeared in
+				an INTERFACE or IMPORT pragma. For now we
+				assume that the external language is C.
+		Is_Exported     Likewise but for an EXPORT pragma.
+		Is_Inlined      True if the subprogram is to be inlined.
+
+       In addition for function subprograms we have:
+
+		Etype       	Return type of the function.
+
+       Each parameter is first checked by calling must_pass_by_ref on its
+       type to determine if it is passed by reference.  For parameters which
+       are copied in, if they are Ada In Out or Out parameters, their return
+       value becomes part of a record which becomes the return type of the
+       function (C function - note that this applies only to Ada procedures
+       so there is no Ada return type). Additional code to store back the
+       parameters will be generated on the caller side.  This transformation
+       is done here, not in the front-end.
+
+       The intended result of the transformation can be seen from the
+       equivalent source rewritings that follow:
+
+						struct temp {int a,b};
+       procedure P (A,B: In Out ...) is		temp P (int A,B)
+       begin					{
+	 ..					  ..
+       end P;					  return {A,B};
+						}
+
+						temp t;
+       P(X,Y);					t = P(X,Y);
+						X = t.a , Y = t.b;
+
+       For subprogram types we need to perform mainly the same conversions to
+       GCC form that are needed for procedures and function declarations.  The
+       only difference is that at the end, we make a type declaration instead
+       of a function declaration.  */
+
+    case E_Subprogram_Type:
+    case E_Function:
+    case E_Procedure:
+      {
+	/* The first GCC parameter declaration (a PARM_DECL node).  The
+	   PARM_DECL nodes are chained through the TREE_CHAIN field, so this
+	   actually is the head of this parameter list.  */
+	tree gnu_param_list = NULL_TREE;
+	/* Likewise for the stub associated with an exported procedure.  */
+	tree gnu_stub_param_list = NULL_TREE;
+	/* The type returned by a function. If the subprogram is a procedure
+	   this type should be void_type_node.  */
+	tree gnu_return_type = void_type_node;
+	/* List of fields in return type of procedure with copy-in copy-out
+	   parameters.  */
+	tree gnu_field_list = NULL_TREE;
+	/* Non-null for subprograms containing parameters passed by copy-in
+	   copy-out (Ada In Out or Out parameters not passed by reference),
+	   in which case it is the list of nodes used to specify the values of
+	   the in out/out parameters that are returned as a record upon
+	   procedure return.  The TREE_PURPOSE of an element of this list is
+	   a field of the record and the TREE_VALUE is the PARM_DECL
+	   corresponding to that field.  This list will be saved in the
+	   TYPE_CI_CO_LIST field of the FUNCTION_TYPE node we create.  */
+	tree gnu_return_list = NULL_TREE;
+	/* If an import pragma asks to map this subprogram to a GCC builtin,
+	   this is the builtin DECL node.  */
+	tree gnu_builtin_decl = NULL_TREE;
+	/* For the stub associated with an exported procedure.  */
+	tree gnu_stub_type = NULL_TREE, gnu_stub_name = NULL_TREE;
+	tree gnu_ext_name = create_concat_name (gnat_entity, NULL);
+	Entity_Id gnat_param;
+	bool inline_flag = Is_Inlined (gnat_entity);
+	bool public_flag = Is_Public (gnat_entity) || imported_p;
+	bool extern_flag
+	  = (Is_Public (gnat_entity) && !definition) || imported_p;
+	bool pure_flag = Is_Pure (gnat_entity);
+	bool volatile_flag = No_Return (gnat_entity);
+	bool returns_by_ref = false;
+	bool returns_unconstrained = false;
+	bool returns_by_target_ptr = false;
+	bool has_copy_in_out = false;
+	bool has_stub = false;
+	int parmnum;
+
+	if (kind == E_Subprogram_Type && !definition)
+	  /* A parameter may refer to this type, so defer completion
+	     of any incomplete types.  */
+	  defer_incomplete_level++, this_deferred = true;
+
+	/* If the subprogram has an alias, it is probably inherited, so
+	   we can use the original one.  If the original "subprogram"
+	   is actually an enumeration literal, it may be the first use
+	   of its type, so we must elaborate that type now.  */
+	if (Present (Alias (gnat_entity)))
+	  {
+	    if (Ekind (Alias (gnat_entity)) == E_Enumeration_Literal)
+	      gnat_to_gnu_entity (Etype (Alias (gnat_entity)), NULL_TREE, 0);
+
+	    gnu_decl = gnat_to_gnu_entity (Alias (gnat_entity),
+					   gnu_expr, 0);
+
+	    /* Elaborate any Itypes in the parameters of this entity.  */
+	    for (gnat_temp = First_Formal_With_Extras (gnat_entity);
+		 Present (gnat_temp);
+		 gnat_temp = Next_Formal_With_Extras (gnat_temp))
+	      if (Is_Itype (Etype (gnat_temp)))
+		gnat_to_gnu_entity (Etype (gnat_temp), NULL_TREE, 0);
+
+	    break;
+	  }
+
+	/* If this subprogram is expectedly bound to a GCC builtin, fetch the
+	   corresponding DECL node.
+
+	   We still want the parameter associations to take place because the
+	   proper generation of calls depends on it (a GNAT parameter without
+	   a corresponding GCC tree has a very specific meaning), so we don't
+	   just break here.  */
+	if (Convention (gnat_entity) == Convention_Intrinsic)
+	  gnu_builtin_decl = builtin_decl_for (gnu_ext_name);
+
+	/* ??? What if we don't find the builtin node above ? warn ? err ?
+	   In the current state we neither warn nor err, and calls will just
+	   be handled as for regular subprograms. */
+
+	if (kind == E_Function || kind == E_Subprogram_Type)
+	  gnu_return_type = gnat_to_gnu_type (Etype (gnat_entity));
+
+	/* If this function returns by reference, make the actual
+	   return type of this function the pointer and mark the decl.  */
+	if (Returns_By_Ref (gnat_entity))
+	  {
+	    returns_by_ref = true;
+	    gnu_return_type = build_pointer_type (gnu_return_type);
+	  }
+
+	/* If the Mechanism is By_Reference, ensure the return type uses
+	   the machine's by-reference mechanism, which may not the same
+	   as above (e.g., it might be by passing a fake parameter).  */
+	else if (kind == E_Function
+		 && Mechanism (gnat_entity) == By_Reference)
+	  {
+	    TREE_ADDRESSABLE (gnu_return_type) = 1;
+
+	    /* We expect this bit to be reset by gigi shortly, so can avoid a
+	       type node copy here.  This actually also prevents troubles with
+	       the generation of debug information for the function, because
+	       we might have issued such info for this type already, and would
+	       be attaching a distinct type node to the function if we made a
+	       copy here.  */
+	  }
+
+	/* If we are supposed to return an unconstrained array,
+	   actually return a fat pointer and make a note of that.  Return
+	   a pointer to an unconstrained record of variable size.  */
+	else if (TREE_CODE (gnu_return_type) == UNCONSTRAINED_ARRAY_TYPE)
+	  {
+	    gnu_return_type = TREE_TYPE (gnu_return_type);
+	    returns_unconstrained = true;
+	  }
+
+	/* If the type requires a transient scope, the result is allocated
+	   on the secondary stack, so the result type of the function is
+	   just a pointer.  */
+	else if (Requires_Transient_Scope (Etype (gnat_entity)))
+	  {
+	    gnu_return_type = build_pointer_type (gnu_return_type);
+	    returns_unconstrained = true;
+	  }
+
+	/* If the type is a padded type and the underlying type would not
+	   be passed by reference or this function has a foreign convention,
+	   return the underlying type.  */
+	else if (TREE_CODE (gnu_return_type) == RECORD_TYPE
+		 && TYPE_IS_PADDING_P (gnu_return_type)
+		 && (!default_pass_by_ref (TREE_TYPE
+					   (TYPE_FIELDS (gnu_return_type)))
+		     || Has_Foreign_Convention (gnat_entity)))
+	  gnu_return_type = TREE_TYPE (TYPE_FIELDS (gnu_return_type));
+
+	/* If the return type has a non-constant size, we convert the function
+	   into a procedure and its caller will pass a pointer to an object as
+	   the first parameter when we call the function.  This can happen for
+	   an unconstrained type with a maximum size or a constrained type with
+	   a size not known at compile time.  */
+	if (TYPE_SIZE_UNIT (gnu_return_type)
+	    && !TREE_CONSTANT (TYPE_SIZE_UNIT (gnu_return_type)))
+	  {
+	    returns_by_target_ptr = true;
+	    gnu_param_list
+	      = create_param_decl (get_identifier ("TARGET"),
+				   build_reference_type (gnu_return_type),
+				   true);
+	    gnu_return_type = void_type_node;
+	  }
+
+	/* If the return type has a size that overflows, we cannot have
+	   a function that returns that type.  This usage doesn't make
+	   sense anyway, so give an error here.  */
+	if (TYPE_SIZE_UNIT (gnu_return_type)
+	    && TREE_CONSTANT (TYPE_SIZE_UNIT (gnu_return_type))
+	    && TREE_OVERFLOW (TYPE_SIZE_UNIT (gnu_return_type)))
+	  {
+	    post_error ("cannot return type whose size overflows",
+			gnat_entity);
+	    gnu_return_type = copy_node (gnu_return_type);
+	    TYPE_SIZE (gnu_return_type) = bitsize_zero_node;
+	    TYPE_SIZE_UNIT (gnu_return_type) = size_zero_node;
+	    TYPE_MAIN_VARIANT (gnu_return_type) = gnu_return_type;
+	    TYPE_NEXT_VARIANT (gnu_return_type) = NULL_TREE;
+	  }
+
+	/* Look at all our parameters and get the type of
+	   each.  While doing this, build a copy-out structure if
+	   we need one.  */
+
+	/* Loop over the parameters and get their associated GCC tree.
+	   While doing this, build a copy-out structure if we need one.  */
+	for (gnat_param = First_Formal_With_Extras (gnat_entity), parmnum = 0;
+	     Present (gnat_param);
+	     gnat_param = Next_Formal_With_Extras (gnat_param), parmnum++)
+	  {
+	    tree gnu_param_name = get_entity_name (gnat_param);
+	    tree gnu_param_type = gnat_to_gnu_type (Etype (gnat_param));
+	    tree gnu_param, gnu_field;
+	    bool copy_in_copy_out = false;
+	    Mechanism_Type mech = Mechanism (gnat_param);
+
+	    /* Builtins are expanded inline and there is no real call sequence
+	       involved.  So the type expected by the underlying expander is
+	       always the type of each argument "as is".  */
+	    if (gnu_builtin_decl)
+	      mech = By_Copy;
+	    /* Handle the first parameter of a valued procedure specially.  */
+	    else if (Is_Valued_Procedure (gnat_entity) && parmnum == 0)
+	      mech = By_Copy_Return;
+	    /* Otherwise, see if a Mechanism was supplied that forced this
+	       parameter to be passed one way or another.  */
+	    else if (mech == Default
+		     || mech == By_Copy || mech == By_Reference)
+	      ;
+	    else if (By_Descriptor_Last <= mech && mech <= By_Descriptor)
+	      mech = By_Descriptor;
+	    else if (mech > 0)
+	      {
+		if (TREE_CODE (gnu_param_type) == UNCONSTRAINED_ARRAY_TYPE
+		    || TREE_CODE (TYPE_SIZE (gnu_param_type)) != INTEGER_CST
+		    || 0 < compare_tree_int (TYPE_SIZE (gnu_param_type),
+					     mech))
+		  mech = By_Reference;
+		else
+		  mech = By_Copy;
+	      }
+	    else
+	      {
+		post_error ("unsupported mechanism for&", gnat_param);
+		mech = Default;
+	      }
+
+	    gnu_param
+	      = gnat_to_gnu_param (gnat_param, mech, gnat_entity,
+				   Has_Foreign_Convention (gnat_entity),
+				   &copy_in_copy_out);
+
+	    /* We are returned either a PARM_DECL or a type if no parameter
+	       needs to be passed; in either case, adjust the type.  */
+	    if (DECL_P (gnu_param))
+	      gnu_param_type = TREE_TYPE (gnu_param);
+	    else
+	      {
+		gnu_param_type = gnu_param;
+		gnu_param = NULL_TREE;
+	      }
+
+	    if (gnu_param)
+	      {
+		/* If it's an exported subprogram, we build a parameter list
+		   in parallel, in case we need to emit a stub for it.  */
+		if (Is_Exported (gnat_entity))
+		  {
+		    gnu_stub_param_list
+		      = chainon (gnu_param, gnu_stub_param_list);
+		    /* Change By_Descriptor parameter to By_Reference for
+		       the internal version of an exported subprogram.  */
+		    if (mech == By_Descriptor)
+		      {
+			gnu_param
+			  = gnat_to_gnu_param (gnat_param, By_Reference,
+					       gnat_entity, false,
+					       &copy_in_copy_out);
+			has_stub = true;
+		      }
+		    else
+		      gnu_param = copy_node (gnu_param);
+		  }
+
+		gnu_param_list = chainon (gnu_param, gnu_param_list);
+		Sloc_to_locus (Sloc (gnat_param),
+			       &DECL_SOURCE_LOCATION (gnu_param));
+		save_gnu_tree (gnat_param, gnu_param, false);
+
+		/* If a parameter is a pointer, this function may modify
+		   memory through it and thus shouldn't be considered
+		   a pure function.  Also, the memory may be modified
+		   between two calls, so they can't be CSE'ed.  The latter
+		   case also handles by-ref parameters.  */
+		if (POINTER_TYPE_P (gnu_param_type)
+		    || TYPE_FAT_POINTER_P (gnu_param_type))
+		  pure_flag = false;
+	      }
+
+	    if (copy_in_copy_out)
+	      {
+		if (!has_copy_in_out)
+		  {
+		    gcc_assert (TREE_CODE (gnu_return_type) == VOID_TYPE);
+		    gnu_return_type = make_node (RECORD_TYPE);
+		    TYPE_NAME (gnu_return_type) = get_identifier ("RETURN");
+		    has_copy_in_out = true;
+		  }
+
+		gnu_field = create_field_decl (gnu_param_name, gnu_param_type,
+					       gnu_return_type, 0, 0, 0, 0);
+		Sloc_to_locus (Sloc (gnat_param),
+			       &DECL_SOURCE_LOCATION (gnu_field));
+		TREE_CHAIN (gnu_field) = gnu_field_list;
+		gnu_field_list = gnu_field;
+		gnu_return_list = tree_cons (gnu_field, gnu_param,
+					     gnu_return_list);
+	      }
+	  }
+
+	/* Do not compute record for out parameters if subprogram is
+	   stubbed since structures are incomplete for the back-end.  */
+	if (gnu_field_list && Convention (gnat_entity) != Convention_Stubbed)
+	  finish_record_type (gnu_return_type, nreverse (gnu_field_list),
+			      0, false);
+
+	/* If we have a CICO list but it has only one entry, we convert
+	   this function into a function that simply returns that one
+	   object.  */
+	if (list_length (gnu_return_list) == 1)
+	  gnu_return_type = TREE_TYPE (TREE_PURPOSE (gnu_return_list));
+
+	if (Has_Stdcall_Convention (gnat_entity))
+	  prepend_one_attribute_to
+	    (&attr_list, ATTR_MACHINE_ATTRIBUTE,
+	     get_identifier ("stdcall"), NULL_TREE,
+	     gnat_entity);
+
+	/* If we are on a target where stack realignment is needed for 'main'
+	   to honor GCC's implicit expectations (stack alignment greater than
+	   what the base ABI guarantees), ensure we do the same for foreign
+	   convention subprograms as they might be used as callbacks from code
+	   breaking such expectations.  Note that this applies to task entry
+	   points in particular.  */
+	if (FORCE_PREFERRED_STACK_BOUNDARY_IN_MAIN
+	    && Has_Foreign_Convention (gnat_entity))
+	  prepend_one_attribute_to
+	    (&attr_list, ATTR_MACHINE_ATTRIBUTE,
+	     get_identifier ("force_align_arg_pointer"), NULL_TREE,
+	     gnat_entity);
+
+	/* The lists have been built in reverse.  */
+	gnu_param_list = nreverse (gnu_param_list);
+	if (has_stub)
+	  gnu_stub_param_list = nreverse (gnu_stub_param_list);
+	gnu_return_list = nreverse (gnu_return_list);
+
+	if (Ekind (gnat_entity) == E_Function)
+	  Set_Mechanism (gnat_entity,
+			 (returns_by_ref || returns_unconstrained
+			  ? By_Reference : By_Copy));
+	gnu_type
+	  = create_subprog_type (gnu_return_type, gnu_param_list,
+				 gnu_return_list, returns_unconstrained,
+				 returns_by_ref, returns_by_target_ptr);
+
+	if (has_stub)
+	  gnu_stub_type
+	    = create_subprog_type (gnu_return_type, gnu_stub_param_list,
+				   gnu_return_list, returns_unconstrained,
+				   returns_by_ref, returns_by_target_ptr);
+
+	/* A subprogram (something that doesn't return anything) shouldn't
+	   be considered Pure since there would be no reason for such a
+	   subprogram.  Note that procedures with Out (or In Out) parameters
+	   have already been converted into a function with a return type. */
+	if (TREE_CODE (gnu_return_type) == VOID_TYPE)
+	  pure_flag = false;
+
+	/* The semantics of "pure" in Ada essentially matches that of "const"
+	   in the back-end.  In particular, both properties are orthogonal to
+	   the "nothrow" property.  But this is true only if the EH circuitry
+	   is explicit in the internal representation of the back-end.  If we
+	   are to completely hide the EH circuitry from it, we need to declare
+	   that calls to pure Ada subprograms that can throw have side effects
+	   since they can trigger an "abnormal" transfer of control flow; thus
+	   they can be neither "const" nor "pure" in the back-end sense.  */
+	gnu_type
+	  = build_qualified_type (gnu_type,
+				  TYPE_QUALS (gnu_type)
+				  | (Exception_Mechanism == Back_End_Exceptions
+				     ? TYPE_QUAL_CONST * pure_flag : 0)
+				  | (TYPE_QUAL_VOLATILE * volatile_flag));
+
+	Sloc_to_locus (Sloc (gnat_entity), &input_location);
+
+	if (has_stub)
+	  gnu_stub_type
+	    = build_qualified_type (gnu_stub_type,
+				    TYPE_QUALS (gnu_stub_type)
+				    | (Exception_Mechanism == Back_End_Exceptions
+				       ? TYPE_QUAL_CONST * pure_flag : 0)
+				    | (TYPE_QUAL_VOLATILE * volatile_flag));
+
+	/* If we have a builtin decl for that function, check the signatures
+	   compatibilities.  If the signatures are compatible, use the builtin
+	   decl.  If they are not, we expect the checker predicate to have
+	   posted the appropriate errors, and just continue with what we have
+	   so far.  */
+	if (gnu_builtin_decl)
+	  {
+	    tree gnu_builtin_type = TREE_TYPE (gnu_builtin_decl);
+
+	    if (compatible_signatures_p (gnu_type, gnu_builtin_type))
+	      {
+		gnu_decl = gnu_builtin_decl;
+		gnu_type = gnu_builtin_type;
+		break;
+	      }
+	  }
+
+	/* If there was no specified Interface_Name and the external and
+	   internal names of the subprogram are the same, only use the
+	   internal name to allow disambiguation of nested subprograms.  */
+	if (No (Interface_Name (gnat_entity)) && gnu_ext_name == gnu_entity_id)
+	  gnu_ext_name = NULL_TREE;
+
+	/* If we are defining the subprogram and it has an Address clause
+	   we must get the address expression from the saved GCC tree for the
+	   subprogram if it has a Freeze_Node.  Otherwise, we elaborate
+	   the address expression here since the front-end has guaranteed
+	   in that case that the elaboration has no effects.  If there is
+	   an Address clause and we are not defining the object, just
+	   make it a constant.  */
+	if (Present (Address_Clause (gnat_entity)))
+	  {
+	    tree gnu_address = NULL_TREE;
+
+	    if (definition)
+	      gnu_address
+		= (present_gnu_tree (gnat_entity)
+		   ? get_gnu_tree (gnat_entity)
+		   : gnat_to_gnu (Expression (Address_Clause (gnat_entity))));
+
+	    save_gnu_tree (gnat_entity, NULL_TREE, false);
+
+	    /* Convert the type of the object to a reference type that can
+	       alias everything as per 13.3(19).  */
+	    gnu_type
+	      = build_reference_type_for_mode (gnu_type, ptr_mode, true);
+	    if (gnu_address)
+	      gnu_address = convert (gnu_type, gnu_address);
+
+	    gnu_decl
+	      = create_var_decl (gnu_entity_id, gnu_ext_name, gnu_type,
+				 gnu_address, false, Is_Public (gnat_entity),
+				 extern_flag, false, NULL, gnat_entity);
+	    DECL_BY_REF_P (gnu_decl) = 1;
+	  }
+
+	else if (kind == E_Subprogram_Type)
+	  gnu_decl = create_type_decl (gnu_entity_id, gnu_type, attr_list,
+				       !Comes_From_Source (gnat_entity),
+				       debug_info_p, gnat_entity);
+	else
+	  {
+	    if (has_stub)
+	      {
+		gnu_stub_name = gnu_ext_name;
+		gnu_ext_name = create_concat_name (gnat_entity, "internal");
+		public_flag = false;
+	      }
+
+	    gnu_decl = create_subprog_decl (gnu_entity_id, gnu_ext_name,
+					    gnu_type, gnu_param_list,
+					    inline_flag, public_flag,
+					    extern_flag, attr_list,
+					    gnat_entity);
+	    if (has_stub)
+	      {
+		tree gnu_stub_decl
+		  = create_subprog_decl (gnu_entity_id, gnu_stub_name,
+					 gnu_stub_type, gnu_stub_param_list,
+					 inline_flag, true,
+					 extern_flag, attr_list,
+					 gnat_entity);
+		SET_DECL_FUNCTION_STUB (gnu_decl, gnu_stub_decl);
+	      }
+
+	    /* This is unrelated to the stub built right above.  */
+	    DECL_STUBBED_P (gnu_decl)
+	      = Convention (gnat_entity) == Convention_Stubbed;
+	  }
+      }
+      break;
+
+    case E_Incomplete_Type:
+    case E_Incomplete_Subtype:
+    case E_Private_Type:
+    case E_Private_Subtype:
+    case E_Limited_Private_Type:
+    case E_Limited_Private_Subtype:
+    case E_Record_Type_With_Private:
+    case E_Record_Subtype_With_Private:
+      {
+	/* Get the "full view" of this entity.  If this is an incomplete
+	   entity from a limited with, treat its non-limited view as the
+	   full view.  Otherwise, use either the full view or the underlying
+	   full view, whichever is present.  This is used in all the tests
+	   below.  */
+	Entity_Id full_view
+	  = (IN (Ekind (gnat_entity), Incomplete_Kind)
+	     && From_With_Type (gnat_entity))
+	    ? Non_Limited_View (gnat_entity)
+	    : Present (Full_View (gnat_entity))
+	      ? Full_View (gnat_entity)
+	      : Underlying_Full_View (gnat_entity);
+
+	/* If this is an incomplete type with no full view, it must be a Taft
+	   Amendment type, in which case we return a dummy type.  Otherwise,
+	   just get the type from its Etype.  */
+	if (No (full_view))
+	  {
+	    if (kind == E_Incomplete_Type)
+	      gnu_type = make_dummy_type (gnat_entity);
+	    else
+	      {
+		gnu_decl = gnat_to_gnu_entity (Etype (gnat_entity),
+					       NULL_TREE, 0);
+		maybe_present = true;
+	      }
+	    break;
+	  }
+
+	/* If we already made a type for the full view, reuse it.  */
+	else if (present_gnu_tree (full_view))
+	  {
+	    gnu_decl = get_gnu_tree (full_view);
+	    break;
+	  }
+
+	/* Otherwise, if we are not defining the type now, get the type
+	   from the full view.  But always get the type from the full view
+	   for define on use types, since otherwise we won't see them!  */
+	else if (!definition
+		 || (Is_Itype (full_view)
+		   && No (Freeze_Node (gnat_entity)))
+		 || (Is_Itype (gnat_entity)
+		   && No (Freeze_Node (full_view))))
+	  {
+	    gnu_decl = gnat_to_gnu_entity (full_view, NULL_TREE, 0);
+	    maybe_present = true;
+	    break;
+	  }
+
+	/* For incomplete types, make a dummy type entry which will be
+	   replaced later.  */
+	gnu_type = make_dummy_type (gnat_entity);
+
+	/* Save this type as the full declaration's type so we can do any
+	   needed updates when we see it.  */
+	gnu_decl = create_type_decl (gnu_entity_id, gnu_type, attr_list,
+				     !Comes_From_Source (gnat_entity),
+				     debug_info_p, gnat_entity);
+	save_gnu_tree (full_view, gnu_decl, 0);
+	break;
+      }
+
+      /* Simple class_wide types are always viewed as their root_type
+	 by Gigi unless an Equivalent_Type is specified.  */
+    case E_Class_Wide_Type:
+      gnu_decl = gnat_to_gnu_entity (gnat_equiv_type, NULL_TREE, 0);
+      maybe_present = true;
+      break;
+
+    case E_Task_Type:
+    case E_Task_Subtype:
+    case E_Protected_Type:
+    case E_Protected_Subtype:
+      if (type_annotate_only && No (gnat_equiv_type))
+	gnu_type = void_type_node;
+      else
+	gnu_type = gnat_to_gnu_type (gnat_equiv_type);
+
+      maybe_present = true;
+      break;
+
+    case E_Label:
+      gnu_decl = create_label_decl (gnu_entity_id);
+      break;
+
+    case E_Block:
+    case E_Loop:
+      /* Nothing at all to do here, so just return an ERROR_MARK and claim
+	 we've already saved it, so we don't try to.  */
+      gnu_decl = error_mark_node;
+      saved = true;
+      break;
+
+    default:
+      gcc_unreachable ();
+    }
+
+  /* If we had a case where we evaluated another type and it might have
+     defined this one, handle it here.  */
+  if (maybe_present && present_gnu_tree (gnat_entity))
+    {
+      gnu_decl = get_gnu_tree (gnat_entity);
+      saved = true;
+    }
+
+  /* If we are processing a type and there is either no decl for it or
+     we just made one, do some common processing for the type, such as
+     handling alignment and possible padding.  */
+
+  if ((!gnu_decl || this_made_decl) && IN (kind, Type_Kind))
+    {
+      if (Is_Tagged_Type (gnat_entity)
+	  || Is_Class_Wide_Equivalent_Type (gnat_entity))
+	TYPE_ALIGN_OK (gnu_type) = 1;
+
+      if (AGGREGATE_TYPE_P (gnu_type) && Is_By_Reference_Type (gnat_entity))
+	TYPE_BY_REFERENCE_P (gnu_type) = 1;
+
+      /* ??? Don't set the size for a String_Literal since it is either
+	 confirming or we don't handle it properly (if the low bound is
+	 non-constant).  */
+      if (!gnu_size && kind != E_String_Literal_Subtype)
+	gnu_size = validate_size (Esize (gnat_entity), gnu_type, gnat_entity,
+				  TYPE_DECL, false,
+				  Has_Size_Clause (gnat_entity));
+
+      /* If a size was specified, see if we can make a new type of that size
+	 by rearranging the type, for example from a fat to a thin pointer.  */
+      if (gnu_size)
+	{
+	  gnu_type
+	    = make_type_from_size (gnu_type, gnu_size,
+				   Has_Biased_Representation (gnat_entity));
+
+	  if (operand_equal_p (TYPE_SIZE (gnu_type), gnu_size, 0)
+	      && operand_equal_p (rm_size (gnu_type), gnu_size, 0))
+	    gnu_size = 0;
+	}
+
+      /* If the alignment hasn't already been processed and this is
+	 not an unconstrained array, see if an alignment is specified.
+	 If not, we pick a default alignment for atomic objects.  */
+      if (align != 0 || TREE_CODE (gnu_type) == UNCONSTRAINED_ARRAY_TYPE)
+	;
+      else if (Known_Alignment (gnat_entity))
+	{
+	  align = validate_alignment (Alignment (gnat_entity), gnat_entity,
+				      TYPE_ALIGN (gnu_type));
+
+	  /* Warn on suspiciously large alignments.  This should catch
+	     errors about the (alignment,byte)/(size,bit) discrepancy.  */
+	  if (align > BIGGEST_ALIGNMENT && Has_Alignment_Clause (gnat_entity))
+	    {
+	      tree size;
+
+	      /* If a size was specified, take it into account.  Otherwise
+		 use the RM size for records as the type size has already
+		 been adjusted to the alignment.  */
+	      if (gnu_size)
+		size = gnu_size;
+	      else if ((TREE_CODE (gnu_type) == RECORD_TYPE
+			|| TREE_CODE (gnu_type) == UNION_TYPE
+			|| TREE_CODE (gnu_type) == QUAL_UNION_TYPE)
+		       && !TYPE_IS_FAT_POINTER_P (gnu_type))
+		size = rm_size (gnu_type);
+	      else
+	        size = TYPE_SIZE (gnu_type);
+
+	      /* Consider an alignment as suspicious if the alignment/size
+		 ratio is greater or equal to the byte/bit ratio.  */
+	      if (host_integerp (size, 1)
+		  && align >= TREE_INT_CST_LOW (size) * BITS_PER_UNIT)
+		post_error_ne ("?suspiciously large alignment specified for&",
+			       Expression (Alignment_Clause (gnat_entity)),
+			       gnat_entity);
+	    }
+	}
+      else if (Is_Atomic (gnat_entity) && !gnu_size
+	       && host_integerp (TYPE_SIZE (gnu_type), 1)
+	       && integer_pow2p (TYPE_SIZE (gnu_type)))
+	align = MIN (BIGGEST_ALIGNMENT,
+		     tree_low_cst (TYPE_SIZE (gnu_type), 1));
+      else if (Is_Atomic (gnat_entity) && gnu_size
+	       && host_integerp (gnu_size, 1)
+	       && integer_pow2p (gnu_size))
+	align = MIN (BIGGEST_ALIGNMENT, tree_low_cst (gnu_size, 1));
+
+      /* See if we need to pad the type.  If we did, and made a record,
+	 the name of the new type may be changed.  So get it back for
+	 us when we make the new TYPE_DECL below.  */
+      if (gnu_size || align > 0)
+	gnu_type = maybe_pad_type (gnu_type, gnu_size, align, gnat_entity,
+				   "PAD", true, definition, false);
+
+      if (TREE_CODE (gnu_type) == RECORD_TYPE
+	  && TYPE_IS_PADDING_P (gnu_type))
+	{
+	  gnu_entity_id = TYPE_NAME (gnu_type);
+	  if (TREE_CODE (gnu_entity_id) == TYPE_DECL)
+	    gnu_entity_id = DECL_NAME (gnu_entity_id);
+	}
+
+      set_rm_size (RM_Size (gnat_entity), gnu_type, gnat_entity);
+
+      /* If we are at global level, GCC will have applied variable_size to
+	 the type, but that won't have done anything.  So, if it's not
+	 a constant or self-referential, call elaborate_expression_1 to
+	 make a variable for the size rather than calculating it each time.
+	 Handle both the RM size and the actual size.  */
+      if (global_bindings_p ()
+	  && TYPE_SIZE (gnu_type)
+	  && !TREE_CONSTANT (TYPE_SIZE (gnu_type))
+	  && !CONTAINS_PLACEHOLDER_P (TYPE_SIZE (gnu_type)))
+	{
+	  if (TREE_CODE (gnu_type) == RECORD_TYPE
+	      && operand_equal_p (TYPE_ADA_SIZE (gnu_type),
+				  TYPE_SIZE (gnu_type), 0))
+	    {
+	      TYPE_SIZE (gnu_type)
+		= elaborate_expression_1 (gnat_entity, gnat_entity,
+					  TYPE_SIZE (gnu_type),
+					  get_identifier ("SIZE"),
+					  definition, 0);
+	      SET_TYPE_ADA_SIZE (gnu_type, TYPE_SIZE (gnu_type));
+	    }
+	  else
+	    {
+	      TYPE_SIZE (gnu_type)
+		= elaborate_expression_1 (gnat_entity, gnat_entity,
+					  TYPE_SIZE (gnu_type),
+					  get_identifier ("SIZE"),
+					  definition, 0);
+
+	      /* ??? For now, store the size as a multiple of the alignment
+		 in bytes so that we can see the alignment from the tree.  */
+	      TYPE_SIZE_UNIT (gnu_type)
+		= build_binary_op
+		  (MULT_EXPR, sizetype,
+		   elaborate_expression_1
+		   (gnat_entity, gnat_entity,
+		    build_binary_op (EXACT_DIV_EXPR, sizetype,
+				     TYPE_SIZE_UNIT (gnu_type),
+				     size_int (TYPE_ALIGN (gnu_type)
+					       / BITS_PER_UNIT)),
+		    get_identifier ("SIZE_A_UNIT"),
+		    definition, 0),
+		   size_int (TYPE_ALIGN (gnu_type) / BITS_PER_UNIT));
+
+	      if (TREE_CODE (gnu_type) == RECORD_TYPE)
+		SET_TYPE_ADA_SIZE
+		  (gnu_type,
+		   elaborate_expression_1 (gnat_entity,
+					   gnat_entity,
+					   TYPE_ADA_SIZE (gnu_type),
+					   get_identifier ("RM_SIZE"),
+					   definition, 0));
+		 }
+	}
+
+      /* If this is a record type or subtype, call elaborate_expression_1 on
+	 any field position.  Do this for both global and local types.
+	 Skip any fields that we haven't made trees for to avoid problems with
+	 class wide types.  */
+      if (IN (kind, Record_Kind))
+	for (gnat_temp = First_Entity (gnat_entity); Present (gnat_temp);
+	     gnat_temp = Next_Entity (gnat_temp))
+	  if (Ekind (gnat_temp) == E_Component && present_gnu_tree (gnat_temp))
+	    {
+	      tree gnu_field = get_gnu_tree (gnat_temp);
+
+	      /* ??? Unfortunately, GCC needs to be able to prove the
+		 alignment of this offset and if it's a variable, it can't.
+		 In GCC 3.4, we'll use DECL_OFFSET_ALIGN in some way, but
+		 right now, we have to put in an explicit multiply and
+		 divide by that value.  */
+	      if (!CONTAINS_PLACEHOLDER_P (DECL_FIELD_OFFSET (gnu_field)))
+		{
+		DECL_FIELD_OFFSET (gnu_field)
+		  = build_binary_op
+		    (MULT_EXPR, sizetype,
+		     elaborate_expression_1
+		     (gnat_temp, gnat_temp,
+		      build_binary_op (EXACT_DIV_EXPR, sizetype,
+				       DECL_FIELD_OFFSET (gnu_field),
+				       size_int (DECL_OFFSET_ALIGN (gnu_field)
+						 / BITS_PER_UNIT)),
+		      get_identifier ("OFFSET"),
+		      definition, 0),
+		     size_int (DECL_OFFSET_ALIGN (gnu_field) / BITS_PER_UNIT));
+
+		/* ??? The context of gnu_field is not necessarily gnu_type so
+		   the MULT_EXPR node built above may not be marked by the call
+		   to create_type_decl below.  */
+		if (global_bindings_p ())
+		  mark_visited (&DECL_FIELD_OFFSET (gnu_field));
+		}
+	    }
+
+      gnu_type = build_qualified_type (gnu_type,
+				       (TYPE_QUALS (gnu_type)
+					| (TYPE_QUAL_VOLATILE
+					   * Treat_As_Volatile (gnat_entity))));
+
+      if (Is_Atomic (gnat_entity))
+	check_ok_for_atomic (gnu_type, gnat_entity, false);
+
+      if (Present (Alignment_Clause (gnat_entity)))
+	TYPE_USER_ALIGN (gnu_type) = 1;
+
+      if (Universal_Aliasing (gnat_entity))
+	TYPE_UNIVERSAL_ALIASING_P (TYPE_MAIN_VARIANT (gnu_type)) = 1;
+
+      if (!gnu_decl)
+	gnu_decl = create_type_decl (gnu_entity_id, gnu_type, attr_list,
+				     !Comes_From_Source (gnat_entity),
+				     debug_info_p, gnat_entity);
+      else
+	TREE_TYPE (gnu_decl) = gnu_type;
+    }
+
+  if (IN (kind, Type_Kind) && !TYPE_IS_DUMMY_P (TREE_TYPE (gnu_decl)))
+    {
+      gnu_type = TREE_TYPE (gnu_decl);
+
+      /* Back-annotate the Alignment of the type if not already in the
+	 tree.  Likewise for sizes.  */
+      if (Unknown_Alignment (gnat_entity))
+	Set_Alignment (gnat_entity,
+		       UI_From_Int (TYPE_ALIGN (gnu_type) / BITS_PER_UNIT));
+
+      if (Unknown_Esize (gnat_entity) && TYPE_SIZE (gnu_type))
+	{
+	  /* If the size is self-referential, we annotate the maximum
+	     value of that size.  */
+	  tree gnu_size = TYPE_SIZE (gnu_type);
+
+	  if (CONTAINS_PLACEHOLDER_P (gnu_size))
+	    gnu_size = max_size (gnu_size, true);
+
+	  Set_Esize (gnat_entity, annotate_value (gnu_size));
+
+	  if (type_annotate_only && Is_Tagged_Type (gnat_entity))
+	    {
+	      /* In this mode the tag and the parent components are not
+		 generated by the front-end, so the sizes must be adjusted
+		 explicitly now. */
+	      int size_offset, new_size;
+
+	      if (Is_Derived_Type (gnat_entity))
+		{
+		  size_offset
+		    = UI_To_Int (Esize (Etype (Base_Type (gnat_entity))));
+		  Set_Alignment (gnat_entity,
+				 Alignment (Etype (Base_Type (gnat_entity))));
+		}
+	      else
+		size_offset = POINTER_SIZE;
+
+	      new_size = UI_To_Int (Esize (gnat_entity)) + size_offset;
+	      Set_Esize (gnat_entity,
+			 UI_From_Int (((new_size + (POINTER_SIZE - 1))
+				       / POINTER_SIZE) * POINTER_SIZE));
+	      Set_RM_Size (gnat_entity, Esize (gnat_entity));
+	    }
+	}
+
+      if (Unknown_RM_Size (gnat_entity) && rm_size (gnu_type))
+	Set_RM_Size (gnat_entity, annotate_value (rm_size (gnu_type)));
+    }
+
+  if (!Comes_From_Source (gnat_entity) && DECL_P (gnu_decl))
+    DECL_ARTIFICIAL (gnu_decl) = 1;
+
+  if (!debug_info_p && DECL_P (gnu_decl)
+      && TREE_CODE (gnu_decl) != FUNCTION_DECL
+      && No (Renamed_Object (gnat_entity)))
+    DECL_IGNORED_P (gnu_decl) = 1;
+
+  /* If we haven't already, associate the ..._DECL node that we just made with
+     the input GNAT entity node. */
+  if (!saved)
+    save_gnu_tree (gnat_entity, gnu_decl, false);
+
+  /* If this is an enumeral or floating-point type, we were not able to set
+     the bounds since they refer to the type.  These bounds are always static.
+
+     For enumeration types, also write debugging information and declare the
+     enumeration literal  table, if needed.  */
+
+  if ((kind == E_Enumeration_Type && Present (First_Literal (gnat_entity)))
+      || (kind == E_Floating_Point_Type && !Vax_Float (gnat_entity)))
+    {
+      tree gnu_scalar_type = gnu_type;
+
+      /* If this is a padded type, we need to use the underlying type.  */
+      if (TREE_CODE (gnu_scalar_type) == RECORD_TYPE
+	  && TYPE_IS_PADDING_P (gnu_scalar_type))
+	gnu_scalar_type = TREE_TYPE (TYPE_FIELDS (gnu_scalar_type));
+
+      /* If this is a floating point type and we haven't set a floating
+	 point type yet, use this in the evaluation of the bounds.  */
+      if (!longest_float_type_node && kind == E_Floating_Point_Type)
+	longest_float_type_node = gnu_type;
+
+      TYPE_MIN_VALUE (gnu_scalar_type)
+	= gnat_to_gnu (Type_Low_Bound (gnat_entity));
+      TYPE_MAX_VALUE (gnu_scalar_type)
+	= gnat_to_gnu (Type_High_Bound (gnat_entity));
+
+      if (TREE_CODE (gnu_scalar_type) == ENUMERAL_TYPE)
+	{
+	  /* Since this has both a typedef and a tag, avoid outputting
+	     the name twice.  */
+	  DECL_ARTIFICIAL (gnu_decl) = 1;
+	  rest_of_type_decl_compilation (gnu_decl);
+	}
+    }
+
+  /* If we deferred processing of incomplete types, re-enable it.  If there
+     were no other disables and we have some to process, do so.  */
+  if (this_deferred && --defer_incomplete_level == 0)
+    {
+      if (defer_incomplete_list)
+	{
+	  struct incomplete *incp, *next;
+
+	  /* We are back to level 0 for the deferring of incomplete types.
+	     But processing these incomplete types below may itself require
+	     deferring, so preserve what we have and restart from scratch.  */
+	  incp = defer_incomplete_list;
+	  defer_incomplete_list = NULL;
+
+	  /* For finalization, however, all types must be complete so we
+	     cannot do the same because deferred incomplete types may end up
+	     referencing each other.  Process them all recursively first.  */
+	  defer_finalize_level++;
+
+	  for (; incp; incp = next)
+	    {
+	      next = incp->next;
+
+	      if (incp->old_type)
+		update_pointer_to (TYPE_MAIN_VARIANT (incp->old_type),
+				   gnat_to_gnu_type (incp->full_type));
+	      free (incp);
+	    }
+
+	  defer_finalize_level--;
+	}
+
+      /* All the deferred incomplete types have been processed so we can
+	 now proceed with the finalization of the deferred types.  */
+      if (defer_finalize_level == 0 && defer_finalize_list)
+	{
+	  unsigned int i;
+	  tree t;
+
+	  for (i = 0; VEC_iterate (tree, defer_finalize_list, i, t); i++)
+	    rest_of_type_decl_compilation_no_defer (t);
+
+	  VEC_free (tree, heap, defer_finalize_list);
+	}
+    }
+
+  /* If we are not defining this type, see if it's in the incomplete list.
+     If so, handle that list entry now.  */
+  else if (!definition)
+    {
+      struct incomplete *incp;
+
+      for (incp = defer_incomplete_list; incp; incp = incp->next)
+	if (incp->old_type && incp->full_type == gnat_entity)
+	  {
+	    update_pointer_to (TYPE_MAIN_VARIANT (incp->old_type),
+			       TREE_TYPE (gnu_decl));
+	    incp->old_type = NULL_TREE;
+	  }
+    }
+
+  if (this_global)
+    force_global--;
+
+  if (Is_Packed_Array_Type (gnat_entity)
+      && Is_Itype (Associated_Node_For_Itype (gnat_entity))
+      && No (Freeze_Node (Associated_Node_For_Itype (gnat_entity)))
+      && !present_gnu_tree (Associated_Node_For_Itype (gnat_entity)))
+    gnat_to_gnu_entity (Associated_Node_For_Itype (gnat_entity), NULL_TREE, 0);
+
+  return gnu_decl;
+}
+
+/* Similar, but if the returned value is a COMPONENT_REF, return the
+   FIELD_DECL.  */
+
+tree
+gnat_to_gnu_field_decl (Entity_Id gnat_entity)
+{
+  tree gnu_field = gnat_to_gnu_entity (gnat_entity, NULL_TREE, 0);
+
+  if (TREE_CODE (gnu_field) == COMPONENT_REF)
+    gnu_field = TREE_OPERAND (gnu_field, 1);
+
+  return gnu_field;
+}
+
+/* Wrap up compilation of DECL, a TYPE_DECL, possibly deferring it.
+   Every TYPE_DECL generated for a type definition must be passed
+   to this function once everything else has been done for it.  */
+
+void
+rest_of_type_decl_compilation (tree decl)
+{
+  /* We need to defer finalizing the type if incomplete types
+     are being deferred or if they are being processed.  */
+  if (defer_incomplete_level || defer_finalize_level)
+    VEC_safe_push (tree, heap, defer_finalize_list, decl);
+  else
+    rest_of_type_decl_compilation_no_defer (decl);
+}
+
+/* Same as above but without deferring the compilation.  This
+   function should not be invoked directly on a TYPE_DECL.  */
+
+static void
+rest_of_type_decl_compilation_no_defer (tree decl)
+{
+  const int toplev = global_bindings_p ();
+  tree t = TREE_TYPE (decl);
+
+  rest_of_decl_compilation (decl, toplev, 0);
+
+  /* Now process all the variants.  This is needed for STABS.  */
+  for (t = TYPE_MAIN_VARIANT (t); t; t = TYPE_NEXT_VARIANT (t))
+    {
+      if (t == TREE_TYPE (decl))
+	continue;
+
+      if (!TYPE_STUB_DECL (t))
+	{
+	  TYPE_STUB_DECL (t) = build_decl (TYPE_DECL, DECL_NAME (decl), t);
+	  DECL_ARTIFICIAL (TYPE_STUB_DECL (t)) = 1;
+	}
+
+      rest_of_type_compilation (t, toplev);
+    }
+}
+
+/* Finalize any From_With_Type incomplete types.  We do this after processing
+   our compilation unit and after processing its spec, if this is a body.  */
+
+void
+finalize_from_with_types (void)
+{
+  struct incomplete *incp = defer_limited_with;
+  struct incomplete *next;
+
+  defer_limited_with = 0;
+  for (; incp; incp = next)
+    {
+      next = incp->next;
+
+      if (incp->old_type != 0)
+	update_pointer_to (TYPE_MAIN_VARIANT (incp->old_type),
+			   gnat_to_gnu_type (incp->full_type));
+      free (incp);
+    }
+}
+
+/* Return the equivalent type to be used for GNAT_ENTITY, if it's a
+   kind of type (such E_Task_Type) that has a different type which Gigi
+   uses for its representation.  If the type does not have a special type
+   for its representation, return GNAT_ENTITY.  If a type is supposed to
+   exist, but does not, abort unless annotating types, in which case
+   return Empty.  If GNAT_ENTITY is Empty, return Empty.  */
+
+Entity_Id
+Gigi_Equivalent_Type (Entity_Id gnat_entity)
+{
+  Entity_Id gnat_equiv = gnat_entity;
+
+  if (No (gnat_entity))
+    return gnat_entity;
+
+  switch (Ekind (gnat_entity))
+    {
+    case E_Class_Wide_Subtype:
+      if (Present (Equivalent_Type (gnat_entity)))
+	gnat_equiv = Equivalent_Type (gnat_entity);
+      break;
+
+    case E_Access_Protected_Subprogram_Type:
+    case E_Anonymous_Access_Protected_Subprogram_Type:
+      gnat_equiv = Equivalent_Type (gnat_entity);
+      break;
+
+    case E_Class_Wide_Type:
+      gnat_equiv = ((Present (Equivalent_Type (gnat_entity)))
+		    ? Equivalent_Type (gnat_entity)
+		    : Root_Type (gnat_entity));
+      break;
+
+    case E_Task_Type:
+    case E_Task_Subtype:
+    case E_Protected_Type:
+    case E_Protected_Subtype:
+      gnat_equiv = Corresponding_Record_Type (gnat_entity);
+      break;
+
+    default:
+      break;
+    }
+
+  gcc_assert (Present (gnat_equiv) || type_annotate_only);
+  return gnat_equiv;
+}
+
+/* Return a GCC tree for a parameter corresponding to GNAT_PARAM and
+   using MECH as its passing mechanism, to be placed in the parameter
+   list built for GNAT_SUBPROG.  Assume a foreign convention for the
+   latter if FOREIGN is true.  Also set CICO to true if the parameter
+   must use the copy-in copy-out implementation mechanism.
+
+   The returned tree is a PARM_DECL, except for those cases where no
+   parameter needs to be actually passed to the subprogram; the type
+   of this "shadow" parameter is then returned instead.  */
+
+static tree
+gnat_to_gnu_param (Entity_Id gnat_param, Mechanism_Type mech,
+		   Entity_Id gnat_subprog, bool foreign, bool *cico)
+{
+  tree gnu_param_name = get_entity_name (gnat_param);
+  tree gnu_param_type = gnat_to_gnu_type (Etype (gnat_param));
+  bool in_param = (Ekind (gnat_param) == E_In_Parameter);
+  /* The parameter can be indirectly modified if its address is taken.  */
+  bool ro_param = in_param && !Address_Taken (gnat_param);
+  bool by_return = false, by_component_ptr = false, by_ref = false;
+  tree gnu_param;
+
+  /* Copy-return is used only for the first parameter of a valued procedure.
+     It's a copy mechanism for which a parameter is never allocated.  */
+  if (mech == By_Copy_Return)
+    {
+      gcc_assert (Ekind (gnat_param) == E_Out_Parameter);
+      mech = By_Copy;
+      by_return = true;
+    }
+
+  /* If this is either a foreign function or if the underlying type won't
+     be passed by reference, strip off possible padding type.  */
+  if (TREE_CODE (gnu_param_type) == RECORD_TYPE
+      && TYPE_IS_PADDING_P (gnu_param_type))
+    {
+      tree unpadded_type = TREE_TYPE (TYPE_FIELDS (gnu_param_type));
+
+      if (mech == By_Reference
+	  || foreign
+	  || (!must_pass_by_ref (unpadded_type)
+	      && (mech == By_Copy || !default_pass_by_ref (unpadded_type))))
+	gnu_param_type = unpadded_type;
+    }
+
+  /* If this is a read-only parameter, make a variant of the type that is
+     read-only.  ??? However, if this is an unconstrained array, that type
+     can be very complex, so skip it for now.  Likewise for any other
+     self-referential type.  */
+  if (ro_param
+      && TREE_CODE (gnu_param_type) != UNCONSTRAINED_ARRAY_TYPE
+      && !CONTAINS_PLACEHOLDER_P (TYPE_SIZE (gnu_param_type)))
+    gnu_param_type = build_qualified_type (gnu_param_type,
+					   (TYPE_QUALS (gnu_param_type)
+					    | TYPE_QUAL_CONST));
+
+  /* For foreign conventions, pass arrays as pointers to the element type.
+     First check for unconstrained array and get the underlying array.  */
+  if (foreign && TREE_CODE (gnu_param_type) == UNCONSTRAINED_ARRAY_TYPE)
+    gnu_param_type
+      = TREE_TYPE (TREE_TYPE (TYPE_FIELDS (TREE_TYPE (gnu_param_type))));
+
+  /* VMS descriptors are themselves passed by reference.  */
+  if (mech == By_Descriptor)
+    gnu_param_type
+      = build_pointer_type (build_vms_descriptor (gnu_param_type,
+						  Mechanism (gnat_param),
+						  gnat_subprog));
+
+  /* Arrays are passed as pointers to element type for foreign conventions.  */
+  else if (foreign
+	   && mech != By_Copy
+	   && TREE_CODE (gnu_param_type) == ARRAY_TYPE)
+    {
+      /* Strip off any multi-dimensional entries, then strip
+	 off the last array to get the component type.  */
+      while (TREE_CODE (TREE_TYPE (gnu_param_type)) == ARRAY_TYPE
+	     && TYPE_MULTI_ARRAY_P (TREE_TYPE (gnu_param_type)))
+	gnu_param_type = TREE_TYPE (gnu_param_type);
+
+      by_component_ptr = true;
+      gnu_param_type = TREE_TYPE (gnu_param_type);
+
+      if (ro_param)
+	gnu_param_type = build_qualified_type (gnu_param_type,
+					       (TYPE_QUALS (gnu_param_type)
+						| TYPE_QUAL_CONST));
+
+      gnu_param_type = build_pointer_type (gnu_param_type);
+    }
+
+  /* Fat pointers are passed as thin pointers for foreign conventions.  */
+  else if (foreign && TYPE_FAT_POINTER_P (gnu_param_type))
+    gnu_param_type
+      = make_type_from_size (gnu_param_type, size_int (POINTER_SIZE), 0);
+
+  /* If we must pass or were requested to pass by reference, do so.
+     If we were requested to pass by copy, do so.
+     Otherwise, for foreign conventions, pass In Out or Out parameters
+     or aggregates by reference.  For COBOL and Fortran, pass all
+     integer and FP types that way too.  For Convention Ada, use
+     the standard Ada default.  */
+  else if (must_pass_by_ref (gnu_param_type)
+	   || mech == By_Reference
+	   || (mech != By_Copy
+	       && ((foreign
+		    && (!in_param || AGGREGATE_TYPE_P (gnu_param_type)))
+		   || (foreign
+		       && (Convention (gnat_subprog) == Convention_Fortran
+			   || Convention (gnat_subprog) == Convention_COBOL)
+		       && (INTEGRAL_TYPE_P (gnu_param_type)
+			   || FLOAT_TYPE_P (gnu_param_type)))
+		   || (!foreign
+		       && default_pass_by_ref (gnu_param_type)))))
+    {
+      gnu_param_type = build_reference_type (gnu_param_type);
+      by_ref = true;
+    }
+
+  /* Pass In Out or Out parameters using copy-in copy-out mechanism.  */
+  else if (!in_param)
+    *cico = true;
+
+  if (mech == By_Copy && (by_ref || by_component_ptr))
+    post_error ("?cannot pass & by copy", gnat_param);
+
+  /* If this is an Out parameter that isn't passed by reference and isn't
+     a pointer or aggregate, we don't make a PARM_DECL for it.  Instead,
+     it will be a VAR_DECL created when we process the procedure, so just
+     return its type.  For the special parameter of a valued procedure,
+     never pass it in.
+
+     An exception is made to cover the RM-6.4.1 rule requiring "by copy"
+     Out parameters with discriminants or implicit initial values to be
+     handled like In Out parameters.  These type are normally built as
+     aggregates, hence passed by reference, except for some packed arrays
+     which end up encoded in special integer types.
+
+     The exception we need to make is then for packed arrays of records
+     with discriminants or implicit initial values.  We have no light/easy
+     way to check for the latter case, so we merely check for packed arrays
+     of records.  This may lead to useless copy-in operations, but in very
+     rare cases only, as these would be exceptions in a set of already
+     exceptional situations.  */
+  if (Ekind (gnat_param) == E_Out_Parameter
+      && !by_ref
+      && (by_return
+	  || (mech != By_Descriptor
+	      && !POINTER_TYPE_P (gnu_param_type)
+	      && !AGGREGATE_TYPE_P (gnu_param_type)))
+      && !(Is_Array_Type (Etype (gnat_param))
+	   && Is_Packed (Etype (gnat_param))
+	   && Is_Composite_Type (Component_Type (Etype (gnat_param)))))
+    return gnu_param_type;
+
+  gnu_param = create_param_decl (gnu_param_name, gnu_param_type,
+				 ro_param || by_ref || by_component_ptr);
+  DECL_BY_REF_P (gnu_param) = by_ref;
+  DECL_BY_COMPONENT_PTR_P (gnu_param) = by_component_ptr;
+  DECL_BY_DESCRIPTOR_P (gnu_param) = (mech == By_Descriptor);
+  DECL_POINTS_TO_READONLY_P (gnu_param)
+    = (ro_param && (by_ref || by_component_ptr));
+
+  /* If no Mechanism was specified, indicate what we're using, then
+     back-annotate it.  */
+  if (mech == Default)
+    mech = (by_ref || by_component_ptr) ? By_Reference : By_Copy;
+
+  Set_Mechanism (gnat_param, mech);
+  return gnu_param;
+}
+
+/* Return true if DISCR1 and DISCR2 represent the same discriminant.  */
+
+static bool
+same_discriminant_p (Entity_Id discr1, Entity_Id discr2)
+{
+  while (Present (Corresponding_Discriminant (discr1)))
+    discr1 = Corresponding_Discriminant (discr1);
+
+  while (Present (Corresponding_Discriminant (discr2)))
+    discr2 = Corresponding_Discriminant (discr2);
+
+  return
+    Original_Record_Component (discr1) == Original_Record_Component (discr2);
+}
+
+/* Return true if the array type specified by GNAT_TYPE and GNU_TYPE has
+   a non-aliased component in the back-end sense.  */
+
+static bool
+array_type_has_nonaliased_component (Entity_Id gnat_type, tree gnu_type)
+{
+  /* If the type below this is a multi-array type, then
+     this does not have aliased components.  */
+  if (TREE_CODE (TREE_TYPE (gnu_type)) == ARRAY_TYPE
+      && TYPE_MULTI_ARRAY_P (TREE_TYPE (gnu_type)))
+    return true;
+
+  if (Has_Aliased_Components (gnat_type))
+    return false;
+
+  return type_for_nonaliased_component_p (TREE_TYPE (gnu_type));
+}
+
+/* Given GNAT_ENTITY, elaborate all expressions that are required to
+   be elaborated at the point of its definition, but do nothing else.  */
+
+void
+elaborate_entity (Entity_Id gnat_entity)
+{
+  switch (Ekind (gnat_entity))
+    {
+    case E_Signed_Integer_Subtype:
+    case E_Modular_Integer_Subtype:
+    case E_Enumeration_Subtype:
+    case E_Ordinary_Fixed_Point_Subtype:
+    case E_Decimal_Fixed_Point_Subtype:
+    case E_Floating_Point_Subtype:
+      {
+	Node_Id gnat_lb = Type_Low_Bound (gnat_entity);
+	Node_Id gnat_hb = Type_High_Bound (gnat_entity);
+
+	/* ??? Tests for avoiding static constraint error expression
+	   is needed until the front stops generating bogus conversions
+	   on bounds of real types. */
+
+	if (!Raises_Constraint_Error (gnat_lb))
+	  elaborate_expression (gnat_lb, gnat_entity, get_identifier ("L"),
+				1, 0, Needs_Debug_Info (gnat_entity));
+	if (!Raises_Constraint_Error (gnat_hb))
+	  elaborate_expression (gnat_hb, gnat_entity, get_identifier ("U"),
+				1, 0, Needs_Debug_Info (gnat_entity));
+      break;
+      }
+
+    case E_Record_Type:
+      {
+	Node_Id full_definition = Declaration_Node (gnat_entity);
+	Node_Id record_definition = Type_Definition (full_definition);
+
+	/* If this is a record extension, go a level further to find the
+	   record definition.  */
+	if (Nkind (record_definition) == N_Derived_Type_Definition)
+	  record_definition = Record_Extension_Part (record_definition);
+      }
+      break;
+
+    case E_Record_Subtype:
+    case E_Private_Subtype:
+    case E_Limited_Private_Subtype:
+    case E_Record_Subtype_With_Private:
+      if (Is_Constrained (gnat_entity)
+	  && Has_Discriminants (Base_Type (gnat_entity))
+	  && Present (Discriminant_Constraint (gnat_entity)))
+	{
+	  Node_Id gnat_discriminant_expr;
+	  Entity_Id gnat_field;
+
+	  for (gnat_field = First_Discriminant (Base_Type (gnat_entity)),
+	       gnat_discriminant_expr
+	       = First_Elmt (Discriminant_Constraint (gnat_entity));
+	       Present (gnat_field);
+	       gnat_field = Next_Discriminant (gnat_field),
+	       gnat_discriminant_expr = Next_Elmt (gnat_discriminant_expr))
+	    /* ??? For now, ignore access discriminants.  */
+	    if (!Is_Access_Type (Etype (Node (gnat_discriminant_expr))))
+	      elaborate_expression (Node (gnat_discriminant_expr),
+				    gnat_entity,
+				    get_entity_name (gnat_field), 1, 0, 0);
+	}
+      break;
+
+    }
+}
+
+/* Mark GNAT_ENTITY as going out of scope at this point.  Recursively mark
+   any entities on its entity chain similarly.  */
+
+void
+mark_out_of_scope (Entity_Id gnat_entity)
+{
+  Entity_Id gnat_sub_entity;
+  unsigned int kind = Ekind (gnat_entity);
+
+  /* If this has an entity list, process all in the list.  */
+  if (IN (kind, Class_Wide_Kind) || IN (kind, Concurrent_Kind)
+      || IN (kind, Private_Kind)
+      || kind == E_Block || kind == E_Entry || kind == E_Entry_Family
+      || kind == E_Function || kind == E_Generic_Function
+      || kind == E_Generic_Package || kind == E_Generic_Procedure
+      || kind == E_Loop || kind == E_Operator || kind == E_Package
+      || kind == E_Package_Body || kind == E_Procedure
+      || kind == E_Record_Type || kind == E_Record_Subtype
+      || kind == E_Subprogram_Body || kind == E_Subprogram_Type)
+    for (gnat_sub_entity = First_Entity (gnat_entity);
+	 Present (gnat_sub_entity);
+	 gnat_sub_entity = Next_Entity (gnat_sub_entity))
+      if (Scope (gnat_sub_entity) == gnat_entity
+	  && gnat_sub_entity != gnat_entity)
+	mark_out_of_scope (gnat_sub_entity);
+
+  /* Now clear this if it has been defined, but only do so if it isn't
+     a subprogram or parameter.  We could refine this, but it isn't
+     worth it.  If this is statically allocated, it is supposed to
+     hang around out of cope.  */
+  if (present_gnu_tree (gnat_entity) && !Is_Statically_Allocated (gnat_entity)
+      && kind != E_Procedure && kind != E_Function && !IN (kind, Formal_Kind))
+    {
+      save_gnu_tree (gnat_entity, NULL_TREE, true);
+      save_gnu_tree (gnat_entity, error_mark_node, true);
+    }
+}
+
+/* Set the alias set of GNU_NEW_TYPE to be that of GNU_OLD_TYPE.  If this
+   is a multi-dimensional array type, do this recursively.  */
+
+static void
+copy_alias_set (tree gnu_new_type, tree gnu_old_type)
+{
+  /* Remove any padding from GNU_OLD_TYPE.  It doesn't matter in the case
+     of a one-dimensional array, since the padding has the same alias set
+     as the field type, but if it's a multi-dimensional array, we need to
+     see the inner types.  */
+  while (TREE_CODE (gnu_old_type) == RECORD_TYPE
+	 && (TYPE_JUSTIFIED_MODULAR_P (gnu_old_type)
+	     || TYPE_IS_PADDING_P (gnu_old_type)))
+    gnu_old_type = TREE_TYPE (TYPE_FIELDS (gnu_old_type));
+
+  /* We need to be careful here in case GNU_OLD_TYPE is an unconstrained
+     array.  In that case, it doesn't have the same shape as GNU_NEW_TYPE,
+     so we need to go down to what does.  */
+  if (TREE_CODE (gnu_old_type) == UNCONSTRAINED_ARRAY_TYPE)
+    gnu_old_type
+      = TREE_TYPE (TREE_TYPE (TYPE_FIELDS (TREE_TYPE (gnu_old_type))));
+
+  if (TREE_CODE (gnu_new_type) == ARRAY_TYPE
+      && TREE_CODE (TREE_TYPE (gnu_new_type)) == ARRAY_TYPE
+      && TYPE_MULTI_ARRAY_P (TREE_TYPE (gnu_new_type)))
+    copy_alias_set (TREE_TYPE (gnu_new_type), TREE_TYPE (gnu_old_type));
+
+  TYPE_ALIAS_SET (gnu_new_type) = get_alias_set (gnu_old_type);
+  record_component_aliases (gnu_new_type);
+}
+
+/* Return a TREE_LIST describing the substitutions needed to reflect
+   discriminant substitutions from GNAT_SUBTYPE to GNAT_TYPE and add
+   them to GNU_LIST.  If GNAT_TYPE is not specified, use the base type
+   of GNAT_SUBTYPE. The substitutions can be in any order.  TREE_PURPOSE
+   gives the tree for the discriminant and TREE_VALUES is the replacement
+   value.  They are in the form of operands to substitute_in_expr.
+   DEFINITION is as in gnat_to_gnu_entity.  */
+
+static tree
+substitution_list (Entity_Id gnat_subtype, Entity_Id gnat_type,
+		   tree gnu_list, bool definition)
+{
+  Entity_Id gnat_discrim;
+  Node_Id gnat_value;
+
+  if (No (gnat_type))
+    gnat_type = Implementation_Base_Type (gnat_subtype);
+
+  if (Has_Discriminants (gnat_type))
+    for (gnat_discrim = First_Stored_Discriminant (gnat_type),
+	 gnat_value = First_Elmt (Stored_Constraint (gnat_subtype));
+	 Present (gnat_discrim);
+	 gnat_discrim = Next_Stored_Discriminant (gnat_discrim),
+	 gnat_value = Next_Elmt (gnat_value))
+      /* Ignore access discriminants.  */
+      if (!Is_Access_Type (Etype (Node (gnat_value))))
+	gnu_list = tree_cons (gnat_to_gnu_field_decl (gnat_discrim),
+			      elaborate_expression
+			      (Node (gnat_value), gnat_subtype,
+			       get_entity_name (gnat_discrim), definition,
+			       1, 0),
+			      gnu_list);
+
+  return gnu_list;
+}
+
+/* Return true if the size represented by GNU_SIZE can be handled by an
+   allocation.  If STATIC_P is true, consider only what can be done with a
+   static allocation.  */
+
+static bool
+allocatable_size_p (tree gnu_size, bool static_p)
+{
+  HOST_WIDE_INT our_size;
+
+  /* If this is not a static allocation, the only case we want to forbid
+     is an overflowing size.  That will be converted into a raise a
+     Storage_Error.  */
+  if (!static_p)
+    return !(TREE_CODE (gnu_size) == INTEGER_CST
+	     && TREE_OVERFLOW (gnu_size));
+
+  /* Otherwise, we need to deal with both variable sizes and constant
+     sizes that won't fit in a host int.  We use int instead of HOST_WIDE_INT
+     since assemblers may not like very large sizes.  */
+  if (!host_integerp (gnu_size, 1))
+    return false;
+
+  our_size = tree_low_cst (gnu_size, 1);
+  return (int) our_size == our_size;
+}
+
+/* Prepend to ATTR_LIST an entry for an attribute with provided TYPE,
+   NAME, ARGS and ERROR_POINT.  */
+
+static void
+prepend_one_attribute_to (struct attrib ** attr_list,
+			  enum attr_type attr_type,
+			  tree attr_name,
+			  tree attr_args,
+			  Node_Id attr_error_point)
+{
+  struct attrib * attr = (struct attrib *) xmalloc (sizeof (struct attrib));
+
+  attr->type = attr_type;
+  attr->name = attr_name;
+  attr->args = attr_args;
+  attr->error_point = attr_error_point;
+
+  attr->next = *attr_list;
+  *attr_list = attr;
+}
+
+/* Prepend to ATTR_LIST the list of attributes for GNAT_ENTITY, if any.  */
+
+static void
+prepend_attributes (Entity_Id gnat_entity, struct attrib ** attr_list)
+{
+  Node_Id gnat_temp;
+
+  for (gnat_temp = First_Rep_Item (gnat_entity); Present (gnat_temp);
+       gnat_temp = Next_Rep_Item (gnat_temp))
+    if (Nkind (gnat_temp) == N_Pragma)
+      {
+	tree gnu_arg0 = NULL_TREE, gnu_arg1 = NULL_TREE;
+	Node_Id gnat_assoc = Pragma_Argument_Associations (gnat_temp);
+	enum attr_type etype;
+
+	if (Present (gnat_assoc) && Present (First (gnat_assoc))
+	    && Present (Next (First (gnat_assoc)))
+	    && (Nkind (Expression (Next (First (gnat_assoc))))
+		== N_String_Literal))
+	  {
+	    gnu_arg0 = get_identifier (TREE_STRING_POINTER
+				       (gnat_to_gnu
+					(Expression (Next
+						     (First (gnat_assoc))))));
+	    if (Present (Next (Next (First (gnat_assoc))))
+		&& (Nkind (Expression (Next (Next (First (gnat_assoc)))))
+		    == N_String_Literal))
+	      gnu_arg1 = get_identifier (TREE_STRING_POINTER
+					 (gnat_to_gnu
+					  (Expression
+					   (Next (Next
+						  (First (gnat_assoc)))))));
+	  }
+
+	switch (Get_Pragma_Id (Chars (Pragma_Identifier (gnat_temp))))
+	  {
+	  case Pragma_Machine_Attribute:
+	    etype = ATTR_MACHINE_ATTRIBUTE;
+	    break;
+
+	  case Pragma_Linker_Alias:
+	    etype = ATTR_LINK_ALIAS;
+	    break;
+
+	  case Pragma_Linker_Section:
+	    etype = ATTR_LINK_SECTION;
+	    break;
+
+	  case Pragma_Linker_Constructor:
+	    etype = ATTR_LINK_CONSTRUCTOR;
+	    break;
+
+	  case Pragma_Linker_Destructor:
+	    etype = ATTR_LINK_DESTRUCTOR;
+	    break;
+
+	  case Pragma_Weak_External:
+	    etype = ATTR_WEAK_EXTERNAL;
+	    break;
+
+	  default:
+	    continue;
+	  }
+
+
+	/* Prepend to the list now.  Make a list of the argument we might
+	   have, as GCC expects it.  */
+	prepend_one_attribute_to
+	  (attr_list,
+	   etype, gnu_arg0,
+	   (gnu_arg1 != NULL_TREE)
+	   ? build_tree_list (NULL_TREE, gnu_arg1) : NULL_TREE,
+	   Present (Next (First (gnat_assoc)))
+	   ? Expression (Next (First (gnat_assoc))) : gnat_temp);
+      }
+}
+
+/* Get the unpadded version of a GNAT type.  */
+
+tree
+get_unpadded_type (Entity_Id gnat_entity)
+{
+  tree type = gnat_to_gnu_type (gnat_entity);
+
+  if (TREE_CODE (type) == RECORD_TYPE && TYPE_IS_PADDING_P (type))
+    type = TREE_TYPE (TYPE_FIELDS (type));
+
+  return type;
+}
+
+/* Called when we need to protect a variable object using a save_expr.  */
+
+tree
+maybe_variable (tree gnu_operand)
+{
+  if (TREE_CONSTANT (gnu_operand) || TREE_READONLY (gnu_operand)
+      || TREE_CODE (gnu_operand) == SAVE_EXPR
+      || TREE_CODE (gnu_operand) == NULL_EXPR)
+    return gnu_operand;
+
+  if (TREE_CODE (gnu_operand) == UNCONSTRAINED_ARRAY_REF)
+    {
+      tree gnu_result = build1 (UNCONSTRAINED_ARRAY_REF,
+				TREE_TYPE (gnu_operand),
+				variable_size (TREE_OPERAND (gnu_operand, 0)));
+
+      TREE_READONLY (gnu_result) = TREE_STATIC (gnu_result)
+	= TYPE_READONLY (TREE_TYPE (TREE_TYPE (gnu_operand)));
+      return gnu_result;
+    }
+  else
+    return variable_size (gnu_operand);
+}
+
+/* Given a GNAT tree GNAT_EXPR, for an expression which is a value within a
+   type definition (either a bound or a discriminant value) for GNAT_ENTITY,
+   return the GCC tree to use for that expression.  GNU_NAME is the
+   qualification to use if an external name is appropriate and DEFINITION is
+   nonzero if this is a definition of GNAT_ENTITY.  If NEED_VALUE is nonzero,
+   we need a result.  Otherwise, we are just elaborating this for
+   side-effects.  If NEED_DEBUG is nonzero we need the symbol for debugging
+   purposes even if it isn't needed for code generation.  */
+
+static tree
+elaborate_expression (Node_Id gnat_expr, Entity_Id gnat_entity,
+		      tree gnu_name, bool definition, bool need_value,
+		      bool need_debug)
+{
+  tree gnu_expr;
+
+  /* If we already elaborated this expression (e.g., it was involved
+     in the definition of a private type), use the old value.  */
+  if (present_gnu_tree (gnat_expr))
+    return get_gnu_tree (gnat_expr);
+
+  /* If we don't need a value and this is static or a discriminant, we
+     don't need to do anything.  */
+  else if (!need_value
+	   && (Is_OK_Static_Expression (gnat_expr)
+	       || (Nkind (gnat_expr) == N_Identifier
+		   && Ekind (Entity (gnat_expr)) == E_Discriminant)))
+    return 0;
+
+  /* Otherwise, convert this tree to its GCC equivalent.  */
+  gnu_expr
+    = elaborate_expression_1 (gnat_expr, gnat_entity, gnat_to_gnu (gnat_expr),
+			      gnu_name, definition, need_debug);
+
+  /* Save the expression in case we try to elaborate this entity again.  Since
+     this is not a DECL, don't check it.  Don't save if it's a discriminant. */
+  if (!CONTAINS_PLACEHOLDER_P (gnu_expr))
+    save_gnu_tree (gnat_expr, gnu_expr, true);
+
+  return need_value ? gnu_expr : error_mark_node;
+}
+
+/* Similar, but take a GNU expression.  */
+
+static tree
+elaborate_expression_1 (Node_Id gnat_expr, Entity_Id gnat_entity,
+			tree gnu_expr, tree gnu_name, bool definition,
+			bool need_debug)
+{
+  tree gnu_decl = NULL_TREE;
+  /* Skip any conversions and simple arithmetics to see if the expression
+     is a read-only variable.
+     ??? This really should remain read-only, but we have to think about
+     the typing of the tree here.  */
+  tree gnu_inner_expr
+    = skip_simple_arithmetic (remove_conversions (gnu_expr, true));
+  bool expr_global = Is_Public (gnat_entity) || global_bindings_p ();
+  bool expr_variable;
+
+  /* In most cases, we won't see a naked FIELD_DECL here because a
+     discriminant reference will have been replaced with a COMPONENT_REF
+     when the type is being elaborated.  However, there are some cases
+     involving child types where we will.  So convert it to a COMPONENT_REF
+     here.  We have to hope it will be at the highest level of the
+     expression in these cases.  */
+  if (TREE_CODE (gnu_expr) == FIELD_DECL)
+    gnu_expr = build3 (COMPONENT_REF, TREE_TYPE (gnu_expr),
+		       build0 (PLACEHOLDER_EXPR, DECL_CONTEXT (gnu_expr)),
+		       gnu_expr, NULL_TREE);
+
+  /* If GNU_EXPR is neither a placeholder nor a constant, nor a variable
+     that is read-only, make a variable that is initialized to contain the
+     bound when the package containing the definition is elaborated.  If
+     this entity is defined at top level and a bound or discriminant value
+     isn't a constant or a reference to a discriminant, replace the bound
+     by the variable; otherwise use a SAVE_EXPR if needed.  Note that we
+     rely here on the fact that an expression cannot contain both the
+     discriminant and some other variable.  */
+
+  expr_variable = (!CONSTANT_CLASS_P (gnu_expr)
+		   && !(TREE_CODE (gnu_inner_expr) == VAR_DECL
+			&& (TREE_READONLY (gnu_inner_expr)
+			    || DECL_READONLY_ONCE_ELAB (gnu_inner_expr)))
+		   && !CONTAINS_PLACEHOLDER_P (gnu_expr));
+
+  /* If this is a static expression or contains a discriminant, we don't
+     need the variable for debugging (and can't elaborate anyway if a
+     discriminant).  */
+  if (need_debug
+      && (Is_OK_Static_Expression (gnat_expr)
+	  || CONTAINS_PLACEHOLDER_P (gnu_expr)))
+    need_debug = false;
+
+  /* Now create the variable if we need it.  */
+  if (need_debug || (expr_variable && expr_global))
+    gnu_decl
+      = create_var_decl (create_concat_name (gnat_entity,
+					     IDENTIFIER_POINTER (gnu_name)),
+			 NULL_TREE, TREE_TYPE (gnu_expr), gnu_expr,
+			 !need_debug, Is_Public (gnat_entity),
+			 !definition, false, NULL, gnat_entity);
+
+  /* We only need to use this variable if we are in global context since GCC
+     can do the right thing in the local case.  */
+  if (expr_global && expr_variable)
+    return gnu_decl;
+  else if (!expr_variable)
+    return gnu_expr;
+  else
+    return maybe_variable (gnu_expr);
+}
+
+/* Create a record type that contains a SIZE bytes long field of TYPE with a
+   starting bit position so that it is aligned to ALIGN bits, and leaving at
+   least ROOM bytes free before the field.  BASE_ALIGN is the alignment the
+   record is guaranteed to get.  */
+
+tree
+make_aligning_type (tree type, unsigned int align, tree size,
+		    unsigned int base_align, int room)
+{
+  /* We will be crafting a record type with one field at a position set to be
+     the next multiple of ALIGN past record'address + room bytes.  We use a
+     record placeholder to express record'address.  */
+
+  tree record_type = make_node (RECORD_TYPE);
+  tree record = build0 (PLACEHOLDER_EXPR, record_type);
+
+  tree record_addr_st
+    = convert (sizetype, build_unary_op (ADDR_EXPR, NULL_TREE, record));
+
+  /* The diagram below summarizes the shape of what we manipulate:
+
+                    <--------- pos ---------->
+                {  +------------+-------------+-----------------+
+      record  =>{  |############|     ...     | field (type)    |
+                {  +------------+-------------+-----------------+
+		   |<-- room -->|<- voffset ->|<---- size ----->|
+		   o            o
+		   |            |
+		   record_addr  vblock_addr
+
+     Every length is in sizetype bytes there, except "pos" which has to be
+     set as a bit position in the GCC tree for the record.  */
+
+  tree room_st = size_int (room);
+  tree vblock_addr_st = size_binop (PLUS_EXPR, record_addr_st, room_st);
+  tree voffset_st, pos, field;
+
+  tree name = TYPE_NAME (type);
+
+  if (TREE_CODE (name) == TYPE_DECL)
+    name = DECL_NAME (name);
+
+  TYPE_NAME (record_type) = concat_id_with_name (name, "_ALIGN");
+
+  /* Compute VOFFSET and then POS.  The next byte position multiple of some
+     alignment after some address is obtained by "and"ing the alignment minus
+     1 with the two's complement of the address.   */
+
+  voffset_st = size_binop (BIT_AND_EXPR,
+			   size_diffop (size_zero_node, vblock_addr_st),
+			   ssize_int ((align / BITS_PER_UNIT) - 1));
+
+  /* POS = (ROOM + VOFFSET) * BIT_PER_UNIT, in bitsizetype.  */
+
+  pos = size_binop (MULT_EXPR,
+		    convert (bitsizetype,
+			     size_binop (PLUS_EXPR, room_st, voffset_st)),
+                    bitsize_unit_node);
+
+  /* Craft the GCC record representation.  We exceptionally do everything
+     manually here because 1) our generic circuitry is not quite ready to
+     handle the complex position/size expressions we are setting up, 2) we
+     have a strong simplifying factor at hand: we know the maximum possible
+     value of voffset, and 3) we have to set/reset at least the sizes in
+     accordance with this maximum value anyway, as we need them to convey
+     what should be "alloc"ated for this type.
+
+     Use -1 as the 'addressable' indication for the field to prevent the
+     creation of a bitfield.  We don't need one, it would have damaging
+     consequences on the alignment computation, and create_field_decl would
+     make one without this special argument, for instance because of the
+     complex position expression.  */
+
+  field = create_field_decl (get_identifier ("F"), type, record_type,
+                             1, size, pos, -1);
+  TYPE_FIELDS (record_type) = field;
+
+  TYPE_ALIGN (record_type) = base_align;
+  TYPE_USER_ALIGN (record_type) = 1;
+
+  TYPE_SIZE (record_type)
+    = size_binop (PLUS_EXPR,
+                  size_binop (MULT_EXPR, convert (bitsizetype, size),
+                              bitsize_unit_node),
+		  bitsize_int (align + room * BITS_PER_UNIT));
+  TYPE_SIZE_UNIT (record_type)
+    = size_binop (PLUS_EXPR, size,
+		  size_int (room + align / BITS_PER_UNIT));
+
+  TYPE_MODE (record_type) = BLKmode;
+
+  copy_alias_set (record_type, type);
+  return record_type;
+}
+
+/* Return the result of rounding T up to ALIGN.  */
+
+static inline unsigned HOST_WIDE_INT
+round_up_to_align (unsigned HOST_WIDE_INT t, unsigned int align)
+{
+  t += align - 1;
+  t /= align;
+  t *= align;
+  return t;
+}
+
+/* TYPE is a RECORD_TYPE, UNION_TYPE or QUAL_UNION_TYPE that is being used
+   as the field type of a packed record if IN_RECORD is true, or as the
+   component type of a packed array if IN_RECORD is false.  See if we can
+   rewrite it either as a type that has a non-BLKmode, which we can pack
+   tighter in the packed record case, or as a smaller type with BLKmode.
+   If so, return the new type.  If not, return the original type.  */
+
+static tree
+make_packable_type (tree type, bool in_record)
+{
+  unsigned HOST_WIDE_INT size = tree_low_cst (TYPE_SIZE (type), 1);
+  unsigned HOST_WIDE_INT new_size;
+  tree new_type, old_field, field_list = NULL_TREE;
+
+  /* No point in doing anything if the size is zero.  */
+  if (size == 0)
+    return type;
+
+  new_type = make_node (TREE_CODE (type));
+
+  /* Copy the name and flags from the old type to that of the new.
+     Note that we rely on the pointer equality created here for
+     TYPE_NAME to look through conversions in various places.  */
+  TYPE_NAME (new_type) = TYPE_NAME (type);
+  TYPE_JUSTIFIED_MODULAR_P (new_type) = TYPE_JUSTIFIED_MODULAR_P (type);
+  TYPE_CONTAINS_TEMPLATE_P (new_type) = TYPE_CONTAINS_TEMPLATE_P (type);
+  if (TREE_CODE (type) == RECORD_TYPE)
+    TYPE_IS_PADDING_P (new_type) = TYPE_IS_PADDING_P (type);
+
+  /* If we are in a record and have a small size, set the alignment to
+     try for an integral mode.  Otherwise set it to try for a smaller
+     type with BLKmode.  */
+  if (in_record && size <= MAX_FIXED_MODE_SIZE)
+    {
+      TYPE_ALIGN (new_type) = ceil_alignment (size);
+      new_size = round_up_to_align (size, TYPE_ALIGN (new_type));
+    }
+  else
+    {
+      unsigned HOST_WIDE_INT align;
+
+      /* Do not try to shrink the size if the RM size is not constant.  */
+      if (TYPE_CONTAINS_TEMPLATE_P (type)
+	  || !host_integerp (TYPE_ADA_SIZE (type), 1))
+	return type;
+
+      /* Round the RM size up to a unit boundary to get the minimal size
+	 for a BLKmode record.  Give up if it's already the size.  */
+      new_size = TREE_INT_CST_LOW (TYPE_ADA_SIZE (type));
+      new_size = round_up_to_align (new_size, BITS_PER_UNIT);
+      if (new_size == size)
+	return type;
+
+      align = new_size & -new_size;
+      TYPE_ALIGN (new_type) = MIN (TYPE_ALIGN (type), align);
+    }
+
+  TYPE_USER_ALIGN (new_type) = 1;
+
+  /* Now copy the fields, keeping the position and size as we don't want
+     to change the layout by propagating the packedness downwards.  */
+  for (old_field = TYPE_FIELDS (type); old_field;
+       old_field = TREE_CHAIN (old_field))
+    {
+      tree new_field_type = TREE_TYPE (old_field);
+      tree new_field, new_size;
+
+      if (TYPE_MODE (new_field_type) == BLKmode
+	  && (TREE_CODE (new_field_type) == RECORD_TYPE
+	      || TREE_CODE (new_field_type) == UNION_TYPE
+	      || TREE_CODE (new_field_type) == QUAL_UNION_TYPE)
+	  && host_integerp (TYPE_SIZE (new_field_type), 1))
+	new_field_type = make_packable_type (new_field_type, true);
+
+      /* However, for the last field in a not already packed record type
+	 that is of an aggregate type, we need to use the RM_Size in the
+	 packable version of the record type, see finish_record_type.  */
+      if (!TREE_CHAIN (old_field)
+	  && !TYPE_PACKED (type)
+	  && (TREE_CODE (new_field_type) == RECORD_TYPE
+	      || TREE_CODE (new_field_type) == UNION_TYPE
+	      || TREE_CODE (new_field_type) == QUAL_UNION_TYPE)
+	  && !TYPE_IS_FAT_POINTER_P (new_field_type)
+	  && !TYPE_CONTAINS_TEMPLATE_P (new_field_type)
+	  && TYPE_ADA_SIZE (new_field_type))
+	new_size = TYPE_ADA_SIZE (new_field_type);
+      else
+	new_size = DECL_SIZE (old_field);
+
+      new_field = create_field_decl (DECL_NAME (old_field), new_field_type,
+				     new_type, TYPE_PACKED (type), new_size,
+				     bit_position (old_field),
+				     !DECL_NONADDRESSABLE_P (old_field));
+
+      DECL_INTERNAL_P (new_field) = DECL_INTERNAL_P (old_field);
+      SET_DECL_ORIGINAL_FIELD
+	(new_field, (DECL_ORIGINAL_FIELD (old_field)
+		     ? DECL_ORIGINAL_FIELD (old_field) : old_field));
+
+      if (TREE_CODE (new_type) == QUAL_UNION_TYPE)
+	DECL_QUALIFIER (new_field) = DECL_QUALIFIER (old_field);
+
+      TREE_CHAIN (new_field) = field_list;
+      field_list = new_field;
+    }
+
+  finish_record_type (new_type, nreverse (field_list), 2, true);
+  copy_alias_set (new_type, type);
+
+  /* If this is a padding record, we never want to make the size smaller
+     than what was specified.  For QUAL_UNION_TYPE, also copy the size.  */
+  if ((TREE_CODE (type) == RECORD_TYPE && TYPE_IS_PADDING_P (type))
+      || TREE_CODE (type) == QUAL_UNION_TYPE)
+    {
+      TYPE_SIZE (new_type) = TYPE_SIZE (type);
+      TYPE_SIZE_UNIT (new_type) = TYPE_SIZE_UNIT (type);
+    }
+  else
+    {
+      TYPE_SIZE (new_type) = bitsize_int (new_size);
+      TYPE_SIZE_UNIT (new_type)
+	= size_int ((new_size + BITS_PER_UNIT - 1) / BITS_PER_UNIT);
+    }
+
+  if (!TYPE_CONTAINS_TEMPLATE_P (type))
+    SET_TYPE_ADA_SIZE (new_type, TYPE_ADA_SIZE (type));
+
+  compute_record_mode (new_type);
+
+  /* Try harder to get a packable type if necessary, for example
+     in case the record itself contains a BLKmode field.  */
+  if (in_record && TYPE_MODE (new_type) == BLKmode)
+    TYPE_MODE (new_type)
+      = mode_for_size_tree (TYPE_SIZE (new_type), MODE_INT, 1);
+
+  /* If neither the mode nor the size has shrunk, return the old type.  */
+  if (TYPE_MODE (new_type) == BLKmode && new_size >= size)
+    return type;
+
+  return new_type;
+}
+
+/* Ensure that TYPE has SIZE and ALIGN.  Make and return a new padded type
+   if needed.  We have already verified that SIZE and TYPE are large enough.
+
+   GNAT_ENTITY and NAME_TRAILER are used to name the resulting record and
+   to issue a warning.
+
+   IS_USER_TYPE is true if we must complete the original type.
+
+   DEFINITION is true if this type is being defined.
+
+   SAME_RM_SIZE is true if the RM_Size of the resulting type is to be set
+   to SIZE too; otherwise, it's set to the RM_Size of the original type.  */
+
+tree
+maybe_pad_type (tree type, tree size, unsigned int align,
+		Entity_Id gnat_entity, const char *name_trailer,
+		bool is_user_type, bool definition, bool same_rm_size)
+{
+  tree orig_rm_size = same_rm_size ? NULL_TREE : rm_size (type);
+  tree orig_size = TYPE_SIZE (type);
+  unsigned int orig_align = align;
+  tree record, field;
+
+  /* If TYPE is a padded type, see if it agrees with any size and alignment
+     we were given.  If so, return the original type.  Otherwise, strip
+     off the padding, since we will either be returning the inner type
+     or repadding it.  If no size or alignment is specified, use that of
+     the original padded type.  */
+  if (TREE_CODE (type) == RECORD_TYPE && TYPE_IS_PADDING_P (type))
+    {
+      if ((!size
+	   || operand_equal_p (round_up (size,
+					 MAX (align, TYPE_ALIGN (type))),
+			       round_up (TYPE_SIZE (type),
+					 MAX (align, TYPE_ALIGN (type))),
+			       0))
+	  && (align == 0 || align == TYPE_ALIGN (type)))
+	return type;
+
+      if (!size)
+	size = TYPE_SIZE (type);
+      if (align == 0)
+	align = TYPE_ALIGN (type);
+
+      type = TREE_TYPE (TYPE_FIELDS (type));
+      orig_size = TYPE_SIZE (type);
+    }
+
+  /* If the size is either not being changed or is being made smaller (which
+     is not done here (and is only valid for bitfields anyway), show the size
+     isn't changing.  Likewise, clear the alignment if it isn't being
+     changed.  Then return if we aren't doing anything.  */
+  if (size
+      && (operand_equal_p (size, orig_size, 0)
+	  || (TREE_CODE (orig_size) == INTEGER_CST
+	      && tree_int_cst_lt (size, orig_size))))
+    size = NULL_TREE;
+
+  if (align == TYPE_ALIGN (type))
+    align = 0;
+
+  if (align == 0 && !size)
+    return type;
+
+  /* If requested, complete the original type and give it a name.  */
+  if (is_user_type)
+    create_type_decl (get_entity_name (gnat_entity), type,
+		      NULL, !Comes_From_Source (gnat_entity),
+		      !(TYPE_NAME (type)
+			&& TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
+			&& DECL_IGNORED_P (TYPE_NAME (type))),
+		      gnat_entity);
+
+  /* We used to modify the record in place in some cases, but that could
+     generate incorrect debugging information.  So make a new record
+     type and name.  */
+  record = make_node (RECORD_TYPE);
+  TYPE_IS_PADDING_P (record) = 1;
+
+  if (Present (gnat_entity))
+    TYPE_NAME (record) = create_concat_name (gnat_entity, name_trailer);
+
+  TYPE_VOLATILE (record)
+    = Present (gnat_entity) && Treat_As_Volatile (gnat_entity);
+
+  TYPE_ALIGN (record) = align;
+  if (orig_align)
+    TYPE_USER_ALIGN (record) = align;
+
+  TYPE_SIZE (record) = size ? size : orig_size;
+  TYPE_SIZE_UNIT (record)
+    = convert (sizetype,
+	       size_binop (CEIL_DIV_EXPR, TYPE_SIZE (record),
+			   bitsize_unit_node));
+
+  /* If we are changing the alignment and the input type is a record with
+     BLKmode and a small constant size, try to make a form that has an
+     integral mode.  This might allow the padding record to also have an
+     integral mode, which will be much more efficient.  There is no point
+     in doing so if a size is specified unless it is also a small constant
+     size and it is incorrect to do so if we cannot guarantee that the mode
+     will be naturally aligned since the field must always be addressable.
+
+     ??? This might not always be a win when done for a stand-alone object:
+     since the nominal and the effective type of the object will now have
+     different modes, a VIEW_CONVERT_EXPR will be required for converting
+     between them and it might be hard to overcome afterwards, including
+     at the RTL level when the stand-alone object is accessed as a whole.  */
+  if (align != 0
+      && TREE_CODE (type) == RECORD_TYPE
+      && TYPE_MODE (type) == BLKmode
+      && TREE_CODE (orig_size) == INTEGER_CST
+      && !TREE_CONSTANT_OVERFLOW (orig_size)
+      && compare_tree_int (orig_size, MAX_FIXED_MODE_SIZE) <= 0
+      && (!size
+	  || (TREE_CODE (size) == INTEGER_CST
+	      && compare_tree_int (size, MAX_FIXED_MODE_SIZE) <= 0)))
+    {
+      tree packable_type = make_packable_type (type, true);
+      if (TYPE_MODE (packable_type) != BLKmode
+	  && align >= TYPE_ALIGN (packable_type))
+        type = packable_type;
+    }
+
+  /* Now create the field with the original size.  */
+  field  = create_field_decl (get_identifier ("F"), type, record, 0,
+			      orig_size, bitsize_zero_node, 1);
+  DECL_INTERNAL_P (field) = 1;
+
+  /* Do not finalize it until after the auxiliary record is built.  */
+  finish_record_type (record, field, 1, true);
+
+  /* Set the same size for its RM_size if requested; otherwise reuse
+     the RM_size of the original type.  */
+  SET_TYPE_ADA_SIZE (record, same_rm_size ? size : orig_rm_size);
+
+  /* Unless debugging information isn't being written for the input type,
+     write a record that shows what we are a subtype of and also make a
+     variable that indicates our size, if still variable. */
+  if (TYPE_NAME (record)
+      && AGGREGATE_TYPE_P (type)
+      && TREE_CODE (orig_size) != INTEGER_CST
+      && !(TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
+	   && DECL_IGNORED_P (TYPE_NAME (type))))
+    {
+      tree marker = make_node (RECORD_TYPE);
+      tree name = TYPE_NAME (record);
+      tree orig_name = TYPE_NAME (type);
+
+      if (TREE_CODE (name) == TYPE_DECL)
+	name = DECL_NAME (name);
+
+      if (TREE_CODE (orig_name) == TYPE_DECL)
+	orig_name = DECL_NAME (orig_name);
+
+      TYPE_NAME (marker) = concat_id_with_name (name, "XVS");
+      finish_record_type (marker,
+			  create_field_decl (orig_name, integer_type_node,
+					     marker, 0, NULL_TREE, NULL_TREE,
+					     0),
+			  0, false);
+
+      add_parallel_type (TYPE_STUB_DECL (record), marker);
+
+      if (size && TREE_CODE (size) != INTEGER_CST && definition)
+	create_var_decl (concat_id_with_name (name, "XVZ"), NULL_TREE,
+			 bitsizetype, TYPE_SIZE (record), false, false, false,
+			 false, NULL, gnat_entity);
+    }
+
+  rest_of_record_type_compilation (record);
+
+  /* If the size was widened explicitly, maybe give a warning.  Take the
+     original size as the maximum size of the input if there was an
+     unconstrained record involved and round it up to the specified alignment,
+     if one was specified.  */
+  if (CONTAINS_PLACEHOLDER_P (orig_size))
+    orig_size = max_size (orig_size, true);
+
+  if (align)
+    orig_size = round_up (orig_size, align);
+
+  if (size && Present (gnat_entity)
+      && !operand_equal_p (size, orig_size, 0)
+      && !(TREE_CODE (size) == INTEGER_CST
+	   && TREE_CODE (orig_size) == INTEGER_CST
+	   && tree_int_cst_lt (size, orig_size)))
+    {
+      Node_Id gnat_error_node = Empty;
+
+      if (Is_Packed_Array_Type (gnat_entity))
+	gnat_entity = Original_Array_Type (gnat_entity);
+
+      if ((Ekind (gnat_entity) == E_Component
+	   || Ekind (gnat_entity) == E_Discriminant)
+	  && Present (Component_Clause (gnat_entity)))
+	gnat_error_node = Last_Bit (Component_Clause (gnat_entity));
+      else if (Present (Size_Clause (gnat_entity)))
+	gnat_error_node = Expression (Size_Clause (gnat_entity));
+
+      /* Generate message only for entities that come from source, since
+	 if we have an entity created by expansion, the message will be
+	 generated for some other corresponding source entity.  */
+      if (Comes_From_Source (gnat_entity) && Present (gnat_error_node))
+	post_error_ne_tree ("{^ }bits of & unused?", gnat_error_node,
+			    gnat_entity,
+			    size_diffop (size, orig_size));
+
+      else if (*name_trailer == 'C' && !Is_Internal (gnat_entity))
+	post_error_ne_tree ("component of& padded{ by ^ bits}?",
+			    gnat_entity, gnat_entity,
+			    size_diffop (size, orig_size));
+    }
+
+  return record;
+}
+
+/* Given a GNU tree and a GNAT list of choices, generate an expression to test
+   the value passed against the list of choices.  */
+
+tree
+choices_to_gnu (tree operand, Node_Id choices)
+{
+  Node_Id choice;
+  Node_Id gnat_temp;
+  tree result = integer_zero_node;
+  tree this_test, low = 0, high = 0, single = 0;
+
+  for (choice = First (choices); Present (choice); choice = Next (choice))
+    {
+      switch (Nkind (choice))
+	{
+	case N_Range:
+	  low = gnat_to_gnu (Low_Bound (choice));
+	  high = gnat_to_gnu (High_Bound (choice));
+
+	  /* There's no good type to use here, so we might as well use
+	     integer_type_node.  */
+	  this_test
+	    = build_binary_op (TRUTH_ANDIF_EXPR, integer_type_node,
+			       build_binary_op (GE_EXPR, integer_type_node,
+						operand, low),
+			       build_binary_op (LE_EXPR, integer_type_node,
+						operand, high));
+
+	  break;
+
+	case N_Subtype_Indication:
+	  gnat_temp = Range_Expression (Constraint (choice));
+	  low = gnat_to_gnu (Low_Bound (gnat_temp));
+	  high = gnat_to_gnu (High_Bound (gnat_temp));
+
+	  this_test
+	    = build_binary_op (TRUTH_ANDIF_EXPR, integer_type_node,
+			       build_binary_op (GE_EXPR, integer_type_node,
+						operand, low),
+			       build_binary_op (LE_EXPR, integer_type_node,
+						operand, high));
+	  break;
+
+	case N_Identifier:
+	case N_Expanded_Name:
+	  /* This represents either a subtype range, an enumeration
+	     literal, or a constant  Ekind says which.  If an enumeration
+	     literal or constant, fall through to the next case.  */
+	  if (Ekind (Entity (choice)) != E_Enumeration_Literal
+	      && Ekind (Entity (choice)) != E_Constant)
+	    {
+	      tree type = gnat_to_gnu_type (Entity (choice));
+
+	      low = TYPE_MIN_VALUE (type);
+	      high = TYPE_MAX_VALUE (type);
+
+	      this_test
+		= build_binary_op (TRUTH_ANDIF_EXPR, integer_type_node,
+				   build_binary_op (GE_EXPR, integer_type_node,
+						    operand, low),
+				   build_binary_op (LE_EXPR, integer_type_node,
+						    operand, high));
+	      break;
+	    }
+	  /* ... fall through ... */
+	case N_Character_Literal:
+	case N_Integer_Literal:
+	  single = gnat_to_gnu (choice);
+	  this_test = build_binary_op (EQ_EXPR, integer_type_node, operand,
+				       single);
+	  break;
+
+	case N_Others_Choice:
+	  this_test = integer_one_node;
+	  break;
+
+	default:
+	  gcc_unreachable ();
+	}
+
+      result = build_binary_op (TRUTH_ORIF_EXPR, integer_type_node,
+				result, this_test);
+    }
+
+  return result;
+}
+
+/* Adjust PACKED setting as passed to gnat_to_gnu_field for a field of
+   type FIELD_TYPE to be placed in RECORD_TYPE.  Return the result.  */
+
+static int
+adjust_packed (tree field_type, tree record_type, int packed)
+{
+  /* If the field contains an item of variable size, we cannot pack it
+     because we cannot create temporaries of non-fixed size in case
+     we need to take the address of the field.  See addressable_p and
+     the notes on the addressability issues for further details.  */
+  if (is_variable_size (field_type))
+    return 0;
+
+  /* If the alignment of the record is specified and the field type
+     is over-aligned, request Storage_Unit alignment for the field.  */
+  if (packed == -2)
+    {
+      if (TYPE_ALIGN (field_type) > TYPE_ALIGN (record_type))
+	return -1;
+      else
+	return 0;
+    }
+
+  return packed;
+}
+
+/* Return a GCC tree for a field corresponding to GNAT_FIELD to be
+   placed in GNU_RECORD_TYPE.
+
+   PACKED is 1 if the enclosing record is packed, -1 if the enclosing
+   record has Component_Alignment of Storage_Unit, -2 if the enclosing
+   record has a specified alignment.
+
+   DEFINITION is true if this field is for a record being defined.  */
+
+static tree
+gnat_to_gnu_field (Entity_Id gnat_field, tree gnu_record_type, int packed,
+		   bool definition)
+{
+  tree gnu_field_id = get_entity_name (gnat_field);
+  tree gnu_field_type = gnat_to_gnu_type (Etype (gnat_field));
+  tree gnu_field, gnu_size, gnu_pos;
+  bool needs_strict_alignment
+    = (Is_Aliased (gnat_field) || Strict_Alignment (Etype (gnat_field))
+       || Treat_As_Volatile (gnat_field));
+
+  /* If this field requires strict alignment, we cannot pack it because
+     it would very likely be under-aligned in the record.  */
+  if (needs_strict_alignment)
+    packed = 0;
+  else
+    packed = adjust_packed (gnu_field_type, gnu_record_type, packed);
+
+  /* If a size is specified, use it.  Otherwise, if the record type is packed,
+     use the official RM size.  See "Handling of Type'Size Values" in Einfo
+     for further details.  */
+  if (Known_Static_Esize (gnat_field))
+    gnu_size = validate_size (Esize (gnat_field), gnu_field_type,
+			      gnat_field, FIELD_DECL, false, true);
+  else if (packed == 1)
+    gnu_size = validate_size (RM_Size (Etype (gnat_field)), gnu_field_type,
+			      gnat_field, FIELD_DECL, false, true);
+  else
+    gnu_size = NULL_TREE;
+
+  /* If we have a specified size that's smaller than that of the field type,
+     or a position is specified, and the field type is also a record that's
+     BLKmode, see if we can get either an integral mode form of the type or
+     a smaller BLKmode form.  If we can, show a size was specified for the
+     field if there wasn't one already, so we know to make this a bitfield
+     and avoid making things wider.
+
+     Doing this is first useful if the record is packed because we may then
+     place the field at a non-byte-aligned position and so achieve tighter
+     packing.
+
+     This is in addition *required* if the field shares a byte with another
+     field and the front-end lets the back-end handle the references, because
+     GCC does not handle BLKmode bitfields properly.
+
+     We avoid the transformation if it is not required or potentially useful,
+     as it might entail an increase of the field's alignment and have ripple
+     effects on the outer record type.  A typical case is a field known to be
+     byte aligned and not to share a byte with another field.
+
+     Besides, we don't even look the possibility of a transformation in cases
+     known to be in error already, for instance when an invalid size results
+     from a component clause.  */
+
+  if (TREE_CODE (gnu_field_type) == RECORD_TYPE
+      && TYPE_MODE (gnu_field_type) == BLKmode
+      && host_integerp (TYPE_SIZE (gnu_field_type), 1)
+      && (packed == 1
+	  || (gnu_size
+	      && (tree_int_cst_lt (gnu_size, TYPE_SIZE (gnu_field_type))
+		  || Present (Component_Clause (gnat_field))))))
+    {
+      /* See what the alternate type and size would be.  */
+      tree gnu_packable_type = make_packable_type (gnu_field_type, true);
+
+      bool has_byte_aligned_clause
+	= Present (Component_Clause (gnat_field))
+	  && (UI_To_Int (Component_Bit_Offset (gnat_field))
+	      % BITS_PER_UNIT == 0);
+
+      /* Compute whether we should avoid the substitution.  */
+      bool reject
+	/* There is no point substituting if there is no change...  */
+	= (gnu_packable_type == gnu_field_type)
+	 /* ... nor when the field is known to be byte aligned and not to
+	    share a byte with another field.  */
+	  || (has_byte_aligned_clause
+	      && value_factor_p (gnu_size, BITS_PER_UNIT))
+	 /* The size of an aliased field must be an exact multiple of the
+	    type's alignment, which the substitution might increase.  Reject
+	    substitutions that would so invalidate a component clause when the
+	    specified position is byte aligned, as the change would have no
+	    real benefit from the packing standpoint anyway.  */
+	  || (Is_Aliased (gnat_field)
+	      && has_byte_aligned_clause
+	      && !value_factor_p (gnu_size, TYPE_ALIGN (gnu_packable_type)));
+
+      /* Substitute unless told otherwise.  */
+      if (!reject)
+	{
+	  gnu_field_type = gnu_packable_type;
+
+	  if (!gnu_size)
+	    gnu_size = rm_size (gnu_field_type);
+	}
+    }
+
+  /* If we are packing the record and the field is BLKmode, round the
+     size up to a byte boundary.  */
+  if (packed && TYPE_MODE (gnu_field_type) == BLKmode && gnu_size)
+    gnu_size = round_up (gnu_size, BITS_PER_UNIT);
+
+  if (Present (Component_Clause (gnat_field)))
+    {
+      gnu_pos = UI_To_gnu (Component_Bit_Offset (gnat_field), bitsizetype);
+      gnu_size = validate_size (Esize (gnat_field), gnu_field_type,
+				gnat_field, FIELD_DECL, false, true);
+
+      /* Ensure the position does not overlap with the parent subtype,
+	 if there is one.  */
+      if (Present (Parent_Subtype (Underlying_Type (Scope (gnat_field)))))
+	{
+	  tree gnu_parent
+	    = gnat_to_gnu_type (Parent_Subtype
+				(Underlying_Type (Scope (gnat_field))));
+
+	  if (TREE_CODE (TYPE_SIZE (gnu_parent)) == INTEGER_CST
+	      && tree_int_cst_lt (gnu_pos, TYPE_SIZE (gnu_parent)))
+	    {
+	      post_error_ne_tree
+		("offset of& must be beyond parent{, minimum allowed is ^}",
+		 First_Bit (Component_Clause (gnat_field)), gnat_field,
+		 TYPE_SIZE_UNIT (gnu_parent));
+	    }
+	}
+
+      /* If this field needs strict alignment, ensure the record is
+	 sufficiently aligned and that that position and size are
+	 consistent with the alignment.  */
+      if (needs_strict_alignment)
+	{
+	  TYPE_ALIGN (gnu_record_type)
+	    = MAX (TYPE_ALIGN (gnu_record_type), TYPE_ALIGN (gnu_field_type));
+
+	  if (gnu_size
+	      && !operand_equal_p (gnu_size, TYPE_SIZE (gnu_field_type), 0))
+	    {
+	      if (Is_Atomic (gnat_field) || Is_Atomic (Etype (gnat_field)))
+		post_error_ne_tree
+		  ("atomic field& must be natural size of type{ (^)}",
+		   Last_Bit (Component_Clause (gnat_field)), gnat_field,
+		   TYPE_SIZE (gnu_field_type));
+
+	      else if (Is_Aliased (gnat_field))
+		post_error_ne_tree
+		  ("size of aliased field& must be ^ bits",
+		   Last_Bit (Component_Clause (gnat_field)), gnat_field,
+		   TYPE_SIZE (gnu_field_type));
+
+	      else if (Strict_Alignment (Etype (gnat_field)))
+		post_error_ne_tree
+		  ("size of & with aliased or tagged components not ^ bits",
+		   Last_Bit (Component_Clause (gnat_field)), gnat_field,
+		   TYPE_SIZE (gnu_field_type));
+
+	      gnu_size = NULL_TREE;
+	    }
+
+	  if (!integer_zerop (size_binop
+			      (TRUNC_MOD_EXPR, gnu_pos,
+			       bitsize_int (TYPE_ALIGN (gnu_field_type)))))
+	    {
+	      if (Is_Aliased (gnat_field))
+		post_error_ne_num
+		  ("position of aliased field& must be multiple of ^ bits",
+		   First_Bit (Component_Clause (gnat_field)), gnat_field,
+		   TYPE_ALIGN (gnu_field_type));
+
+	      else if (Treat_As_Volatile (gnat_field))
+		post_error_ne_num
+		  ("position of volatile field& must be multiple of ^ bits",
+		   First_Bit (Component_Clause (gnat_field)), gnat_field,
+		   TYPE_ALIGN (gnu_field_type));
+
+	      else if (Strict_Alignment (Etype (gnat_field)))
+		post_error_ne_num
+  ("position of & with aliased or tagged components not multiple of ^ bits",
+		   First_Bit (Component_Clause (gnat_field)), gnat_field,
+		   TYPE_ALIGN (gnu_field_type));
+
+	      else
+		gcc_unreachable ();
+
+	      gnu_pos = NULL_TREE;
+	    }
+	}
+
+      if (Is_Atomic (gnat_field))
+	check_ok_for_atomic (gnu_field_type, gnat_field, false);
+    }
+
+  /* If the record has rep clauses and this is the tag field, make a rep
+     clause for it as well.  */
+  else if (Has_Specified_Layout (Scope (gnat_field))
+	   && Chars (gnat_field) == Name_uTag)
+    {
+      gnu_pos = bitsize_zero_node;
+      gnu_size = TYPE_SIZE (gnu_field_type);
+    }
+
+  else
+    gnu_pos = NULL_TREE;
+
+  /* We need to make the size the maximum for the type if it is
+     self-referential and an unconstrained type.  In that case, we can't
+     pack the field since we can't make a copy to align it.  */
+  if (TREE_CODE (gnu_field_type) == RECORD_TYPE
+      && !gnu_size
+      && CONTAINS_PLACEHOLDER_P (TYPE_SIZE (gnu_field_type))
+      && !Is_Constrained (Underlying_Type (Etype (gnat_field))))
+    {
+      gnu_size = max_size (TYPE_SIZE (gnu_field_type), true);
+      packed = 0;
+    }
+
+  /* If a size is specified, adjust the field's type to it.  */
+  if (gnu_size)
+    {
+      /* If the field's type is justified modular, we would need to remove
+	 the wrapper to (better) meet the layout requirements.  However we
+	 can do so only if the field is not aliased to preserve the unique
+	 layout and if the prescribed size is not greater than that of the
+	 packed array to preserve the justification.  */
+      if (!needs_strict_alignment
+	  && TREE_CODE (gnu_field_type) == RECORD_TYPE
+	  && TYPE_JUSTIFIED_MODULAR_P (gnu_field_type)
+	  && tree_int_cst_compare (gnu_size, TYPE_ADA_SIZE (gnu_field_type))
+	       <= 0)
+	gnu_field_type = TREE_TYPE (TYPE_FIELDS (gnu_field_type));
+
+      gnu_field_type
+	= make_type_from_size (gnu_field_type, gnu_size,
+			       Has_Biased_Representation (gnat_field));
+      gnu_field_type = maybe_pad_type (gnu_field_type, gnu_size, 0, gnat_field,
+				       "PAD", false, definition, true);
+    }
+
+  /* Otherwise (or if there was an error), don't specify a position.  */
+  else
+    gnu_pos = NULL_TREE;
+
+  gcc_assert (TREE_CODE (gnu_field_type) != RECORD_TYPE
+	      || !TYPE_CONTAINS_TEMPLATE_P (gnu_field_type));
+
+  /* Now create the decl for the field.  */
+  gnu_field = create_field_decl (gnu_field_id, gnu_field_type, gnu_record_type,
+				 packed, gnu_size, gnu_pos,
+				 Is_Aliased (gnat_field));
+  Sloc_to_locus (Sloc (gnat_field), &DECL_SOURCE_LOCATION (gnu_field));
+  TREE_THIS_VOLATILE (gnu_field) = Treat_As_Volatile (gnat_field);
+
+  if (Ekind (gnat_field) == E_Discriminant)
+    DECL_DISCRIMINANT_NUMBER (gnu_field)
+      = UI_To_gnu (Discriminant_Number (gnat_field), sizetype);
+
+  return gnu_field;
+}
+
+/* Return true if TYPE is a type with variable size, a padding type with a
+   field of variable size or is a record that has a field such a field.  */
+
+static bool
+is_variable_size (tree type)
+{
+  tree field;
+
+  if (!TREE_CONSTANT (TYPE_SIZE (type)))
+    return true;
+
+  if (TREE_CODE (type) == RECORD_TYPE
+      && TYPE_IS_PADDING_P (type)
+      && !TREE_CONSTANT (DECL_SIZE (TYPE_FIELDS (type))))
+    return true;
+
+  if (TREE_CODE (type) != RECORD_TYPE
+      && TREE_CODE (type) != UNION_TYPE
+      && TREE_CODE (type) != QUAL_UNION_TYPE)
+    return false;
+
+  for (field = TYPE_FIELDS (type); field; field = TREE_CHAIN (field))
+    if (is_variable_size (TREE_TYPE (field)))
+      return true;
+
+  return false;
+}
+
+/* qsort comparer for the bit positions of two record components.  */
+
+static int
+compare_field_bitpos (const PTR rt1, const PTR rt2)
+{
+  const_tree const field1 = * (const_tree const *) rt1;
+  const_tree const field2 = * (const_tree const *) rt2;
+  const int ret
+    = tree_int_cst_compare (bit_position (field1), bit_position (field2));
+
+  return ret ? ret : (int) (DECL_UID (field1) - DECL_UID (field2));
+}
+
+/* Return a GCC tree for a record type given a GNAT Component_List and a chain
+   of GCC trees for fields that are in the record and have already been
+   processed.  When called from gnat_to_gnu_entity during the processing of a
+   record type definition, the GCC nodes for the discriminants will be on
+   the chain.  The other calls to this function are recursive calls from
+   itself for the Component_List of a variant and the chain is empty.
+
+   PACKED is 1 if this is for a packed record, -1 if this is for a record
+   with Component_Alignment of Storage_Unit, -2 if this is for a record
+   with a specified alignment.
+
+   DEFINITION is true if we are defining this record.
+
+   P_GNU_REP_LIST, if nonzero, is a pointer to a list to which each field
+   with a rep clause is to be added.  If it is nonzero, that is all that
+   should be done with such fields.
+
+   CANCEL_ALIGNMENT, if true, means the alignment should be zeroed before
+   laying out the record.  This means the alignment only serves to force fields
+   to be bitfields, but not require the record to be that aligned.  This is
+   used for variants.
+
+   ALL_REP, if true, means a rep clause was found for all the fields.  This
+   simplifies the logic since we know we're not in the mixed case.
+
+   DO_NOT_FINALIZE, if true, means that the record type is expected to be
+   modified afterwards so it will not be sent to the back-end for finalization.
+
+   UNCHECKED_UNION, if true, means that we are building a type for a record
+   with a Pragma Unchecked_Union.
+
+   The processing of the component list fills in the chain with all of the
+   fields of the record and then the record type is finished.  */
+
+static void
+components_to_record (tree gnu_record_type, Node_Id component_list,
+		      tree gnu_field_list, int packed, bool definition,
+		      tree *p_gnu_rep_list, bool cancel_alignment,
+		      bool all_rep, bool do_not_finalize, bool unchecked_union)
+{
+  Node_Id component_decl;
+  Entity_Id gnat_field;
+  Node_Id variant_part;
+  tree gnu_our_rep_list = NULL_TREE;
+  tree gnu_field, gnu_last;
+  bool layout_with_rep = false;
+  bool all_rep_and_size = all_rep && TYPE_SIZE (gnu_record_type);
+
+  /* For each variable within each component declaration create a GCC field
+     and add it to the list, skipping any pragmas in the list.  */
+  if (Present (Component_Items (component_list)))
+    for (component_decl = First_Non_Pragma (Component_Items (component_list));
+	 Present (component_decl);
+	 component_decl = Next_Non_Pragma (component_decl))
+      {
+	gnat_field = Defining_Entity (component_decl);
+
+	if (Chars (gnat_field) == Name_uParent)
+	  gnu_field = tree_last (TYPE_FIELDS (gnu_record_type));
+	else
+	  {
+	    gnu_field = gnat_to_gnu_field (gnat_field, gnu_record_type,
+					   packed, definition);
+
+	    /* If this is the _Tag field, put it before any discriminants,
+	       instead of after them as is the case for all other fields.
+	       Ignore field of void type if only annotating.  */
+	    if (Chars (gnat_field) == Name_uTag)
+	      gnu_field_list = chainon (gnu_field_list, gnu_field);
+	    else
+	      {
+		TREE_CHAIN (gnu_field) = gnu_field_list;
+		gnu_field_list = gnu_field;
+	      }
+	  }
+
+	  save_gnu_tree (gnat_field, gnu_field, false);
+      }
+
+  /* At the end of the component list there may be a variant part.  */
+  variant_part = Variant_Part (component_list);
+
+  /* We create a QUAL_UNION_TYPE for the variant part since the variants are
+     mutually exclusive and should go in the same memory.  To do this we need
+     to treat each variant as a record whose elements are created from the
+     component list for the variant.  So here we create the records from the
+     lists for the variants and put them all into the QUAL_UNION_TYPE.
+     If this is an Unchecked_Union, we make a UNION_TYPE instead or
+     use GNU_RECORD_TYPE if there are no fields so far.  */
+  if (Present (variant_part))
+    {
+      tree gnu_discriminant = gnat_to_gnu (Name (variant_part));
+      Node_Id variant;
+      tree gnu_name = TYPE_NAME (gnu_record_type);
+      tree gnu_var_name
+	= concat_id_with_name (get_identifier (Get_Name_String
+					       (Chars (Name (variant_part)))),
+			       "XVN");
+      tree gnu_union_type;
+      tree gnu_union_name;
+      tree gnu_union_field;
+      tree gnu_variant_list = NULL_TREE;
+
+      if (TREE_CODE (gnu_name) == TYPE_DECL)
+	gnu_name = DECL_NAME (gnu_name);
+
+      gnu_union_name = concat_id_with_name (gnu_name,
+					    IDENTIFIER_POINTER (gnu_var_name));
+
+      /* Reuse an enclosing union if all fields are in the variant part
+	 and there is no representation clause on the record, to match
+	 the layout of C unions.  There is an associated check below.  */
+      if (!gnu_field_list
+	  && TREE_CODE (gnu_record_type) == UNION_TYPE
+	  && !TYPE_PACKED (gnu_record_type))
+	gnu_union_type = gnu_record_type;
+      else
+	{
+	  gnu_union_type
+	    = make_node (unchecked_union ? UNION_TYPE : QUAL_UNION_TYPE);
+
+	  TYPE_NAME (gnu_union_type) = gnu_union_name;
+	  TYPE_ALIGN (gnu_union_type) = 0;
+	  TYPE_PACKED (gnu_union_type) = TYPE_PACKED (gnu_record_type);
+	}
+
+      for (variant = First_Non_Pragma (Variants (variant_part));
+	   Present (variant);
+	   variant = Next_Non_Pragma (variant))
+	{
+	  tree gnu_variant_type = make_node (RECORD_TYPE);
+	  tree gnu_inner_name;
+	  tree gnu_qual;
+
+	  Get_Variant_Encoding (variant);
+	  gnu_inner_name = get_identifier (Name_Buffer);
+	  TYPE_NAME (gnu_variant_type)
+	    = concat_id_with_name (gnu_union_name,
+				   IDENTIFIER_POINTER (gnu_inner_name));
+
+	  /* Set the alignment of the inner type in case we need to make
+	     inner objects into bitfields, but then clear it out
+	     so the record actually gets only the alignment required.  */
+	  TYPE_ALIGN (gnu_variant_type) = TYPE_ALIGN (gnu_record_type);
+	  TYPE_PACKED (gnu_variant_type) = TYPE_PACKED (gnu_record_type);
+
+	  /* Similarly, if the outer record has a size specified and all fields
+	     have record rep clauses, we can propagate the size into the
+	     variant part.  */
+	  if (all_rep_and_size)
+	    {
+	      TYPE_SIZE (gnu_variant_type) = TYPE_SIZE (gnu_record_type);
+	      TYPE_SIZE_UNIT (gnu_variant_type)
+		= TYPE_SIZE_UNIT (gnu_record_type);
+	    }
+
+	  /* Create the record type for the variant.  Note that we defer
+	     finalizing it until after we are sure to actually use it.  */
+	  components_to_record (gnu_variant_type, Component_List (variant),
+				NULL_TREE, packed, definition,
+				&gnu_our_rep_list, !all_rep_and_size, all_rep,
+				true, unchecked_union);
+
+	  gnu_qual = choices_to_gnu (gnu_discriminant,
+				     Discrete_Choices (variant));
+
+	  Set_Present_Expr (variant, annotate_value (gnu_qual));
+
+	  /* If this is an Unchecked_Union and we have exactly one field,
+	     use this field directly to match the layout of C unions.  */
+	  if (unchecked_union
+	      && TYPE_FIELDS (gnu_variant_type)
+	      && !TREE_CHAIN (TYPE_FIELDS (gnu_variant_type)))
+	    gnu_field = TYPE_FIELDS (gnu_variant_type);
+	  else
+	    {
+	      /* Deal with packedness like in gnat_to_gnu_field.  */
+	      int field_packed
+		= adjust_packed (gnu_variant_type, gnu_record_type, packed);
+
+	      /* Finalize the record type now.  We used to throw away
+		 empty records but we no longer do that because we need
+		 them to generate complete debug info for the variant;
+		 otherwise, the union type definition will be lacking
+		 the fields associated with these empty variants.  */
+	      rest_of_record_type_compilation (gnu_variant_type);
+
+	      gnu_field = create_field_decl (gnu_inner_name, gnu_variant_type,
+					     gnu_union_type, field_packed,
+					     (all_rep_and_size
+					      ? TYPE_SIZE (gnu_variant_type)
+					      : 0),
+					     (all_rep_and_size
+					      ? bitsize_zero_node : 0),
+					     0);
+
+	      DECL_INTERNAL_P (gnu_field) = 1;
+
+	      if (!unchecked_union)
+		DECL_QUALIFIER (gnu_field) = gnu_qual;
+	    }
+
+	  TREE_CHAIN (gnu_field) = gnu_variant_list;
+	  gnu_variant_list = gnu_field;
+	}
+
+      /* Only make the QUAL_UNION_TYPE if there are any non-empty variants.  */
+      if (gnu_variant_list)
+	{
+	  int union_field_packed;
+
+	  if (all_rep_and_size)
+	    {
+	      TYPE_SIZE (gnu_union_type) = TYPE_SIZE (gnu_record_type);
+	      TYPE_SIZE_UNIT (gnu_union_type)
+		= TYPE_SIZE_UNIT (gnu_record_type);
+	    }
+
+	  finish_record_type (gnu_union_type, nreverse (gnu_variant_list),
+			      all_rep_and_size ? 1 : 0, false);
+
+	  /* If GNU_UNION_TYPE is our record type, it means we must have an
+	     Unchecked_Union with no fields.  Verify that and, if so, just
+	     return.  */
+	  if (gnu_union_type == gnu_record_type)
+	    {
+	      gcc_assert (unchecked_union
+			  && !gnu_field_list
+			  && !gnu_our_rep_list);
+	      return;
+	    }
+
+	  /* Deal with packedness like in gnat_to_gnu_field.  */
+	  union_field_packed
+	    = adjust_packed (gnu_union_type, gnu_record_type, packed);
+
+	  gnu_union_field
+	    = create_field_decl (gnu_var_name, gnu_union_type, gnu_record_type,
+				 union_field_packed,
+				 all_rep ? TYPE_SIZE (gnu_union_type) : 0,
+				 all_rep ? bitsize_zero_node : 0, 0);
+
+	  DECL_INTERNAL_P (gnu_union_field) = 1;
+	  TREE_CHAIN (gnu_union_field) = gnu_field_list;
+	  gnu_field_list = gnu_union_field;
+	}
+    }
+
+  /* Scan GNU_FIELD_LIST and see if any fields have rep clauses.  If they
+     do, pull them out and put them into GNU_OUR_REP_LIST.  We have to do this
+     in a separate pass since we want to handle the discriminants but can't
+     play with them until we've used them in debugging data above.
+
+     ??? Note: if we then reorder them, debugging information will be wrong,
+     but there's nothing that can be done about this at the moment.  */
+  for (gnu_field = gnu_field_list, gnu_last = NULL_TREE; gnu_field; )
+    {
+      if (DECL_FIELD_OFFSET (gnu_field))
+	{
+	  tree gnu_next = TREE_CHAIN (gnu_field);
+
+	  if (!gnu_last)
+	    gnu_field_list = gnu_next;
+	  else
+	    TREE_CHAIN (gnu_last) = gnu_next;
+
+	  TREE_CHAIN (gnu_field) = gnu_our_rep_list;
+	  gnu_our_rep_list = gnu_field;
+	  gnu_field = gnu_next;
+	}
+      else
+	{
+	  gnu_last = gnu_field;
+	  gnu_field = TREE_CHAIN (gnu_field);
+	}
+    }
+
+  /* If we have any items in our rep'ed field list, it is not the case that all
+     the fields in the record have rep clauses, and P_REP_LIST is nonzero,
+     set it and ignore the items.  */
+  if (gnu_our_rep_list && p_gnu_rep_list && !all_rep)
+    *p_gnu_rep_list = chainon (*p_gnu_rep_list, gnu_our_rep_list);
+  else if (gnu_our_rep_list)
+    {
+      /* Otherwise, sort the fields by bit position and put them into their
+	 own record if we have any fields without rep clauses. */
+      tree gnu_rep_type
+	= (gnu_field_list ? make_node (RECORD_TYPE) : gnu_record_type);
+      int len = list_length (gnu_our_rep_list);
+      tree *gnu_arr = (tree *) alloca (sizeof (tree) * len);
+      int i;
+
+      for (i = 0, gnu_field = gnu_our_rep_list; gnu_field;
+	   gnu_field = TREE_CHAIN (gnu_field), i++)
+	gnu_arr[i] = gnu_field;
+
+      qsort (gnu_arr, len, sizeof (tree), compare_field_bitpos);
+
+      /* Put the fields in the list in order of increasing position, which
+	 means we start from the end.  */
+      gnu_our_rep_list = NULL_TREE;
+      for (i = len - 1; i >= 0; i--)
+	{
+	  TREE_CHAIN (gnu_arr[i]) = gnu_our_rep_list;
+	  gnu_our_rep_list = gnu_arr[i];
+	  DECL_CONTEXT (gnu_arr[i]) = gnu_rep_type;
+	}
+
+      if (gnu_field_list)
+	{
+	  finish_record_type (gnu_rep_type, gnu_our_rep_list, 1, false);
+	  gnu_field = create_field_decl (get_identifier ("REP"), gnu_rep_type,
+					 gnu_record_type, 0, 0, 0, 1);
+	  DECL_INTERNAL_P (gnu_field) = 1;
+	  gnu_field_list = chainon (gnu_field_list, gnu_field);
+	}
+      else
+	{
+	  layout_with_rep = true;
+	  gnu_field_list = nreverse (gnu_our_rep_list);
+	}
+    }
+
+  if (cancel_alignment)
+    TYPE_ALIGN (gnu_record_type) = 0;
+
+  finish_record_type (gnu_record_type, nreverse (gnu_field_list),
+		      layout_with_rep ? 1 : 0, do_not_finalize);
+}
+
+/* Given GNU_SIZE, a GCC tree representing a size, return a Uint to be
+   placed into an Esize, Component_Bit_Offset, or Component_Size value
+   in the GNAT tree.  */
+
+static Uint
+annotate_value (tree gnu_size)
+{
+  int len = TREE_CODE_LENGTH (TREE_CODE (gnu_size));
+  TCode tcode;
+  Node_Ref_Or_Val ops[3], ret;
+  int i;
+  int size;
+  struct tree_int_map **h = NULL;
+
+  /* See if we've already saved the value for this node.  */
+  if (EXPR_P (gnu_size))
+    {
+      struct tree_int_map in;
+      if (!annotate_value_cache)
+        annotate_value_cache = htab_create_ggc (512, tree_int_map_hash,
+					        tree_int_map_eq, 0);
+      in.base.from = gnu_size;
+      h = (struct tree_int_map **)
+	    htab_find_slot (annotate_value_cache, &in, INSERT);
+
+      if (*h)
+	return (Node_Ref_Or_Val) (*h)->to;
+    }
+
+  /* If we do not return inside this switch, TCODE will be set to the
+     code to use for a Create_Node operand and LEN (set above) will be
+     the number of recursive calls for us to make.  */
+
+  switch (TREE_CODE (gnu_size))
+    {
+    case INTEGER_CST:
+      if (TREE_OVERFLOW (gnu_size))
+	return No_Uint;
+
+      /* This may have come from a conversion from some smaller type,
+	 so ensure this is in bitsizetype.  */
+      gnu_size = convert (bitsizetype, gnu_size);
+
+      /* For negative values, use NEGATE_EXPR of the supplied value.  */
+      if (tree_int_cst_sgn (gnu_size) < 0)
+	{
+	  /* The ridiculous code below is to handle the case of the largest
+	     negative integer.  */
+	  tree negative_size = size_diffop (bitsize_zero_node, gnu_size);
+	  bool adjust = false;
+	  tree temp;
+
+	  if (TREE_OVERFLOW (negative_size))
+	    {
+	      negative_size
+		= size_binop (MINUS_EXPR, bitsize_zero_node,
+			      size_binop (PLUS_EXPR, gnu_size,
+					  bitsize_one_node));
+	      adjust = true;
+	    }
+
+	  temp = build1 (NEGATE_EXPR, bitsizetype, negative_size);
+	  if (adjust)
+	    temp = build2 (MINUS_EXPR, bitsizetype, temp, bitsize_one_node);
+
+	  return annotate_value (temp);
+	}
+
+      if (!host_integerp (gnu_size, 1))
+	return No_Uint;
+
+      size = tree_low_cst (gnu_size, 1);
+
+      /* This peculiar test is to make sure that the size fits in an int
+	 on machines where HOST_WIDE_INT is not "int".  */
+      if (tree_low_cst (gnu_size, 1) == size)
+	return UI_From_Int (size);
+      else
+	return No_Uint;
+
+    case COMPONENT_REF:
+      /* The only case we handle here is a simple discriminant reference.  */
+      if (TREE_CODE (TREE_OPERAND (gnu_size, 0)) == PLACEHOLDER_EXPR
+	  && TREE_CODE (TREE_OPERAND (gnu_size, 1)) == FIELD_DECL
+	  && DECL_DISCRIMINANT_NUMBER (TREE_OPERAND (gnu_size, 1)))
+	return Create_Node (Discrim_Val,
+			    annotate_value (DECL_DISCRIMINANT_NUMBER
+					    (TREE_OPERAND (gnu_size, 1))),
+			    No_Uint, No_Uint);
+      else
+	return No_Uint;
+
+    CASE_CONVERT:   case NON_LVALUE_EXPR:
+      return annotate_value (TREE_OPERAND (gnu_size, 0));
+
+      /* Now just list the operations we handle.  */
+    case COND_EXPR:		tcode = Cond_Expr; break;
+    case PLUS_EXPR:		tcode = Plus_Expr; break;
+    case MINUS_EXPR:		tcode = Minus_Expr; break;
+    case MULT_EXPR:		tcode = Mult_Expr; break;
+    case TRUNC_DIV_EXPR:	tcode = Trunc_Div_Expr; break;
+    case CEIL_DIV_EXPR:		tcode = Ceil_Div_Expr; break;
+    case FLOOR_DIV_EXPR:	tcode = Floor_Div_Expr; break;
+    case TRUNC_MOD_EXPR:	tcode = Trunc_Mod_Expr; break;
+    case CEIL_MOD_EXPR:		tcode = Ceil_Mod_Expr; break;
+    case FLOOR_MOD_EXPR:	tcode = Floor_Mod_Expr; break;
+    case EXACT_DIV_EXPR:	tcode = Exact_Div_Expr; break;
+    case NEGATE_EXPR:		tcode = Negate_Expr; break;
+    case MIN_EXPR:		tcode = Min_Expr; break;
+    case MAX_EXPR:		tcode = Max_Expr; break;
+    case ABS_EXPR:		tcode = Abs_Expr; break;
+    case TRUTH_ANDIF_EXPR:	tcode = Truth_Andif_Expr; break;
+    case TRUTH_ORIF_EXPR:	tcode = Truth_Orif_Expr; break;
+    case TRUTH_AND_EXPR:	tcode = Truth_And_Expr; break;
+    case TRUTH_OR_EXPR:		tcode = Truth_Or_Expr; break;
+    case TRUTH_XOR_EXPR:	tcode = Truth_Xor_Expr; break;
+    case TRUTH_NOT_EXPR:	tcode = Truth_Not_Expr; break;
+    case BIT_AND_EXPR:		tcode = Bit_And_Expr; break;
+    case LT_EXPR:		tcode = Lt_Expr; break;
+    case LE_EXPR:		tcode = Le_Expr; break;
+    case GT_EXPR:		tcode = Gt_Expr; break;
+    case GE_EXPR:		tcode = Ge_Expr; break;
+    case EQ_EXPR:		tcode = Eq_Expr; break;
+    case NE_EXPR:		tcode = Ne_Expr; break;
+
+    default:
+      return No_Uint;
+    }
+
+  /* Now get each of the operands that's relevant for this code.  If any
+     cannot be expressed as a repinfo node, say we can't.  */
+  for (i = 0; i < 3; i++)
+    ops[i] = No_Uint;
+
+  for (i = 0; i < len; i++)
+    {
+      ops[i] = annotate_value (TREE_OPERAND (gnu_size, i));
+      if (ops[i] == No_Uint)
+	return No_Uint;
+    }
+
+  ret = Create_Node (tcode, ops[0], ops[1], ops[2]);
+
+  /* Save the result in the cache.  */
+  if (h)
+    {
+      *h = GGC_NEW (struct tree_int_map);
+      (*h)->base.from = gnu_size;
+      (*h)->to = ret;
+    }
+
+  return ret;
+}
+
+/* Given GNAT_ENTITY, a record type, and GNU_TYPE, its corresponding
+   GCC type, set Component_Bit_Offset and Esize to the position and size
+   used by Gigi.  */
+
+static void
+annotate_rep (Entity_Id gnat_entity, tree gnu_type)
+{
+  tree gnu_list;
+  tree gnu_entry;
+  Entity_Id gnat_field;
+
+  /* We operate by first making a list of all fields and their positions
+     (we can get the sizes easily at any time) by a recursive call
+     and then update all the sizes into the tree.  */
+  gnu_list = compute_field_positions (gnu_type, NULL_TREE,
+				      size_zero_node, bitsize_zero_node,
+				      BIGGEST_ALIGNMENT);
+
+  for (gnat_field = First_Entity (gnat_entity); Present (gnat_field);
+       gnat_field = Next_Entity (gnat_field))
+    if ((Ekind (gnat_field) == E_Component
+	 || (Ekind (gnat_field) == E_Discriminant
+	     && !Is_Unchecked_Union (Scope (gnat_field)))))
+      {
+	tree parent_offset = bitsize_zero_node;
+
+	gnu_entry = purpose_member (gnat_to_gnu_field_decl (gnat_field),
+				    gnu_list);
+
+	if (gnu_entry)
+	  {
+	    if (type_annotate_only && Is_Tagged_Type (gnat_entity))
+	      {
+		/* In this mode the tag and parent components have not been
+		   generated, so we add the appropriate offset to each
+		   component.  For a component appearing in the current
+		   extension, the offset is the size of the parent.  */
+	    if (Is_Derived_Type (gnat_entity)
+		&& Original_Record_Component (gnat_field) == gnat_field)
+	      parent_offset
+		= UI_To_gnu (Esize (Etype (Base_Type (gnat_entity))),
+			     bitsizetype);
+	    else
+	      parent_offset = bitsize_int (POINTER_SIZE);
+	      }
+
+	  Set_Component_Bit_Offset
+	    (gnat_field,
+	     annotate_value
+	     (size_binop (PLUS_EXPR,
+			  bit_from_pos (TREE_PURPOSE (TREE_VALUE (gnu_entry)),
+					TREE_VALUE (TREE_VALUE
+						    (TREE_VALUE (gnu_entry)))),
+			  parent_offset)));
+
+	    Set_Esize (gnat_field,
+		       annotate_value (DECL_SIZE (TREE_PURPOSE (gnu_entry))));
+	  }
+	else if (Is_Tagged_Type (gnat_entity)
+		 && Is_Derived_Type (gnat_entity))
+	  {
+	    /* If there is no gnu_entry, this is an inherited component whose
+	       position is the same as in the parent type.  */
+	    Set_Component_Bit_Offset
+	      (gnat_field,
+	       Component_Bit_Offset (Original_Record_Component (gnat_field)));
+	    Set_Esize (gnat_field,
+		       Esize (Original_Record_Component (gnat_field)));
+	  }
+      }
+}
+
+/* Scan all fields in GNU_TYPE and build entries where TREE_PURPOSE is the
+   FIELD_DECL and TREE_VALUE a TREE_LIST with TREE_PURPOSE being the byte
+   position and TREE_VALUE being a TREE_LIST with TREE_PURPOSE the value to be
+   placed into DECL_OFFSET_ALIGN and TREE_VALUE the bit position.  GNU_POS is
+   to be added to the position, GNU_BITPOS to the bit position, OFFSET_ALIGN is
+   the present value of DECL_OFFSET_ALIGN and GNU_LIST is a list of the entries
+   so far.  */
+
+static tree
+compute_field_positions (tree gnu_type, tree gnu_list, tree gnu_pos,
+			 tree gnu_bitpos, unsigned int offset_align)
+{
+  tree gnu_field;
+  tree gnu_result = gnu_list;
+
+  for (gnu_field = TYPE_FIELDS (gnu_type); gnu_field;
+       gnu_field = TREE_CHAIN (gnu_field))
+    {
+      tree gnu_our_bitpos = size_binop (PLUS_EXPR, gnu_bitpos,
+					DECL_FIELD_BIT_OFFSET (gnu_field));
+      tree gnu_our_offset = size_binop (PLUS_EXPR, gnu_pos,
+					DECL_FIELD_OFFSET (gnu_field));
+      unsigned int our_offset_align
+	= MIN (offset_align, DECL_OFFSET_ALIGN (gnu_field));
+
+      gnu_result
+	= tree_cons (gnu_field,
+		     tree_cons (gnu_our_offset,
+				tree_cons (size_int (our_offset_align),
+					   gnu_our_bitpos, NULL_TREE),
+				NULL_TREE),
+		     gnu_result);
+
+      if (DECL_INTERNAL_P (gnu_field))
+	gnu_result
+	  = compute_field_positions (TREE_TYPE (gnu_field), gnu_result,
+				     gnu_our_offset, gnu_our_bitpos,
+				     our_offset_align);
+    }
+
+  return gnu_result;
+}
+
+/* UINT_SIZE is a Uint giving the specified size for an object of GNU_TYPE
+   corresponding to GNAT_OBJECT.  If size is valid, return a tree corresponding
+   to its value.  Otherwise return 0.  KIND is VAR_DECL is we are specifying
+   the size for an object, TYPE_DECL for the size of a type, and FIELD_DECL
+   for the size of a field.  COMPONENT_P is true if we are being called
+   to process the Component_Size of GNAT_OBJECT.  This is used for error
+   message handling and to indicate to use the object size of GNU_TYPE.
+   ZERO_OK is true if a size of zero is permitted; if ZERO_OK is false,
+   it means that a size of zero should be treated as an unspecified size.  */
+
+static tree
+validate_size (Uint uint_size, tree gnu_type, Entity_Id gnat_object,
+	       enum tree_code kind, bool component_p, bool zero_ok)
+{
+  Node_Id gnat_error_node;
+  tree type_size, size;
+
+  if (kind == VAR_DECL
+      /* If a type needs strict alignment, a component of this type in
+	 a packed record cannot be packed and thus uses the type size.  */
+      || (kind == TYPE_DECL && Strict_Alignment (gnat_object)))
+    type_size = TYPE_SIZE (gnu_type);
+  else
+    type_size = rm_size (gnu_type);
+
+  /* Find the node to use for errors.  */
+  if ((Ekind (gnat_object) == E_Component
+       || Ekind (gnat_object) == E_Discriminant)
+      && Present (Component_Clause (gnat_object)))
+    gnat_error_node = Last_Bit (Component_Clause (gnat_object));
+  else if (Present (Size_Clause (gnat_object)))
+    gnat_error_node = Expression (Size_Clause (gnat_object));
+  else
+    gnat_error_node = gnat_object;
+
+  /* Return 0 if no size was specified, either because Esize was not Present or
+     the specified size was zero.  */
+  if (No (uint_size) || uint_size == No_Uint)
+    return NULL_TREE;
+
+  /* Get the size as a tree.  Give an error if a size was specified, but cannot
+     be represented as in sizetype. */
+  size = UI_To_gnu (uint_size, bitsizetype);
+  if (TREE_OVERFLOW (size))
+    {
+      post_error_ne (component_p ? "component size of & is too large"
+		     : "size of & is too large",
+		     gnat_error_node, gnat_object);
+      return NULL_TREE;
+    }
+
+  /* Ignore a negative size since that corresponds to our back-annotation.
+     Also ignore a zero size unless a size clause exists.  */
+  else if (tree_int_cst_sgn (size) < 0 || (integer_zerop (size) && !zero_ok))
+    return NULL_TREE;
+
+  /* The size of objects is always a multiple of a byte.  */
+  if (kind == VAR_DECL
+      && !integer_zerop (size_binop (TRUNC_MOD_EXPR, size, bitsize_unit_node)))
+    {
+      if (component_p)
+	post_error_ne ("component size for& is not a multiple of Storage_Unit",
+		       gnat_error_node, gnat_object);
+      else
+	post_error_ne ("size for& is not a multiple of Storage_Unit",
+		       gnat_error_node, gnat_object);
+      return NULL_TREE;
+    }
+
+  /* If this is an integral type or a packed array type, the front-end has
+     verified the size, so we need not do it here (which would entail
+     checking against the bounds).  However, if this is an aliased object, it
+     may not be smaller than the type of the object.  */
+  if ((INTEGRAL_TYPE_P (gnu_type) || TYPE_IS_PACKED_ARRAY_TYPE_P (gnu_type))
+      && !(kind == VAR_DECL && Is_Aliased (gnat_object)))
+    return size;
+
+  /* If the object is a record that contains a template, add the size of
+     the template to the specified size.  */
+  if (TREE_CODE (gnu_type) == RECORD_TYPE
+      && TYPE_CONTAINS_TEMPLATE_P (gnu_type))
+    size = size_binop (PLUS_EXPR, DECL_SIZE (TYPE_FIELDS (gnu_type)), size);
+
+  /* Modify the size of the type to be that of the maximum size if it has a
+     discriminant.  */
+  if (type_size && CONTAINS_PLACEHOLDER_P (type_size))
+    type_size = max_size (type_size, true);
+
+  /* If this is an access type or a fat pointer, the minimum size is that given
+     by the smallest integral mode that's valid for pointers.  */
+  if ((TREE_CODE (gnu_type) == POINTER_TYPE) || TYPE_FAT_POINTER_P (gnu_type))
+    {
+      enum machine_mode p_mode;
+
+      for (p_mode = GET_CLASS_NARROWEST_MODE (MODE_INT);
+	   !targetm.valid_pointer_mode (p_mode);
+	   p_mode = GET_MODE_WIDER_MODE (p_mode))
+	;
+
+      type_size = bitsize_int (GET_MODE_BITSIZE (p_mode));
+    }
+
+  /* If the size of the object is a constant, the new size must not be
+     smaller.  */
+  if (TREE_CODE (type_size) != INTEGER_CST
+      || TREE_OVERFLOW (type_size)
+      || tree_int_cst_lt (size, type_size))
+    {
+      if (component_p)
+	post_error_ne_tree
+	  ("component size for& too small{, minimum allowed is ^}",
+	   gnat_error_node, gnat_object, type_size);
+      else
+	post_error_ne_tree ("size for& too small{, minimum allowed is ^}",
+			    gnat_error_node, gnat_object, type_size);
+
+      if (kind == VAR_DECL && !component_p
+	  && TREE_CODE (rm_size (gnu_type)) == INTEGER_CST
+	  && !tree_int_cst_lt (size, rm_size (gnu_type)))
+	post_error_ne_tree_2
+	  ("\\size of ^ is not a multiple of alignment (^ bits)",
+	   gnat_error_node, gnat_object, rm_size (gnu_type),
+	   TYPE_ALIGN (gnu_type));
+
+      else if (INTEGRAL_TYPE_P (gnu_type))
+	post_error_ne ("\\size would be legal if & were not aliased!",
+		       gnat_error_node, gnat_object);
+
+      return NULL_TREE;
+    }
+
+  return size;
+}
+
+/* Similarly, but both validate and process a value of RM_Size.  This
+   routine is only called for types.  */
+
+static void
+set_rm_size (Uint uint_size, tree gnu_type, Entity_Id gnat_entity)
+{
+  /* Only give an error if a Value_Size clause was explicitly given.
+     Otherwise, we'd be duplicating an error on the Size clause.  */
+  Node_Id gnat_attr_node
+    = Get_Attribute_Definition_Clause (gnat_entity, Attr_Value_Size);
+  tree old_size = rm_size (gnu_type);
+  tree size;
+
+  /* Get the size as a tree.  Do nothing if none was specified, either
+     because RM_Size was not Present or if the specified size was zero.
+     Give an error if a size was specified, but cannot be represented as
+     in sizetype.  */
+  if (No (uint_size) || uint_size == No_Uint)
+    return;
+
+  size = UI_To_gnu (uint_size, bitsizetype);
+  if (TREE_OVERFLOW (size))
+    {
+      if (Present (gnat_attr_node))
+	post_error_ne ("Value_Size of & is too large", gnat_attr_node,
+		       gnat_entity);
+
+      return;
+    }
+
+  /* Ignore a negative size since that corresponds to our back-annotation.
+     Also ignore a zero size unless a size clause exists, a Value_Size
+     clause exists, or this is an integer type, in which case the
+     front end will have always set it.  */
+  else if (tree_int_cst_sgn (size) < 0
+	   || (integer_zerop (size) && No (gnat_attr_node)
+	       && !Has_Size_Clause (gnat_entity)
+	       && !Is_Discrete_Or_Fixed_Point_Type (gnat_entity)))
+    return;
+
+  /* If the old size is self-referential, get the maximum size.  */
+  if (CONTAINS_PLACEHOLDER_P (old_size))
+    old_size = max_size (old_size, true);
+
+  /* If the size of the object is a constant, the new size must not be
+     smaller (the front end checks this for scalar types).  */
+  if (TREE_CODE (old_size) != INTEGER_CST
+      || TREE_OVERFLOW (old_size)
+      || (AGGREGATE_TYPE_P (gnu_type)
+	  && tree_int_cst_lt (size, old_size)))
+    {
+      if (Present (gnat_attr_node))
+	post_error_ne_tree
+	  ("Value_Size for& too small{, minimum allowed is ^}",
+	   gnat_attr_node, gnat_entity, old_size);
+
+      return;
+    }
+
+  /* Otherwise, set the RM_Size.  */
+  if (TREE_CODE (gnu_type) == INTEGER_TYPE
+      && Is_Discrete_Or_Fixed_Point_Type (gnat_entity))
+    TYPE_RM_SIZE_NUM (gnu_type) = size;
+  else if (TREE_CODE (gnu_type) == ENUMERAL_TYPE)
+    TYPE_RM_SIZE_NUM (gnu_type) = size;
+  else if ((TREE_CODE (gnu_type) == RECORD_TYPE
+	    || TREE_CODE (gnu_type) == UNION_TYPE
+	    || TREE_CODE (gnu_type) == QUAL_UNION_TYPE)
+	   && !TYPE_IS_FAT_POINTER_P (gnu_type))
+    SET_TYPE_ADA_SIZE (gnu_type, size);
+}
+
+/* Given a type TYPE, return a new type whose size is appropriate for SIZE.
+   If TYPE is the best type, return it.  Otherwise, make a new type.  We
+   only support new integral and pointer types.  FOR_BIASED is nonzero if
+   we are making a biased type.  */
+
+static tree
+make_type_from_size (tree type, tree size_tree, bool for_biased)
+{
+  unsigned HOST_WIDE_INT size;
+  bool biased_p;
+  tree new_type;
+
+  /* If size indicates an error, just return TYPE to avoid propagating
+     the error.  Likewise if it's too large to represent.  */
+  if (!size_tree || !host_integerp (size_tree, 1))
+    return type;
+
+  size = tree_low_cst (size_tree, 1);
+
+  switch (TREE_CODE (type))
+    {
+    case INTEGER_TYPE:
+    case ENUMERAL_TYPE:
+      biased_p = (TREE_CODE (type) == INTEGER_TYPE
+		  && TYPE_BIASED_REPRESENTATION_P (type));
+
+      /* Only do something if the type is not a packed array type and
+	 doesn't already have the proper size.  */
+      if (TYPE_PACKED_ARRAY_TYPE_P (type)
+	  || (TYPE_PRECISION (type) == size && biased_p == for_biased))
+	break;
+
+      biased_p |= for_biased;
+      size = MIN (size, LONG_LONG_TYPE_SIZE);
+
+      if (TYPE_UNSIGNED (type) || biased_p)
+	new_type = make_unsigned_type (size);
+      else
+	new_type = make_signed_type (size);
+      TREE_TYPE (new_type) = TREE_TYPE (type) ? TREE_TYPE (type) : type;
+      TYPE_MIN_VALUE (new_type)
+	= convert (TREE_TYPE (new_type), TYPE_MIN_VALUE (type));
+      TYPE_MAX_VALUE (new_type)
+	= convert (TREE_TYPE (new_type), TYPE_MAX_VALUE (type));
+      TYPE_BIASED_REPRESENTATION_P (new_type) = biased_p;
+      TYPE_RM_SIZE_NUM (new_type) = bitsize_int (size);
+      return new_type;
+
+    case RECORD_TYPE:
+      /* Do something if this is a fat pointer, in which case we
+	 may need to return the thin pointer.  */
+      if (TYPE_IS_FAT_POINTER_P (type) && size < POINTER_SIZE * 2)
+	return
+	  build_pointer_type
+	    (TYPE_OBJECT_RECORD_TYPE (TYPE_UNCONSTRAINED_ARRAY (type)));
+      break;
+
+    case POINTER_TYPE:
+      /* Only do something if this is a thin pointer, in which case we
+	 may need to return the fat pointer.  */
+      if (TYPE_THIN_POINTER_P (type) && size >= POINTER_SIZE * 2)
+	return
+	  build_pointer_type (TYPE_UNCONSTRAINED_ARRAY (TREE_TYPE (type)));
+      break;
+
+    default:
+      break;
+    }
+
+  return type;
+}
+
+/* ALIGNMENT is a Uint giving the alignment specified for GNAT_ENTITY,
+   a type or object whose present alignment is ALIGN.  If this alignment is
+   valid, return it.  Otherwise, give an error and return ALIGN.  */
+
+static unsigned int
+validate_alignment (Uint alignment, Entity_Id gnat_entity, unsigned int align)
+{
+  unsigned int max_allowed_alignment = get_target_maximum_allowed_alignment ();
+  unsigned int new_align;
+  Node_Id gnat_error_node;
+
+  /* Don't worry about checking alignment if alignment was not specified
+     by the source program and we already posted an error for this entity.  */
+  if (Error_Posted (gnat_entity) && !Has_Alignment_Clause (gnat_entity))
+    return align;
+
+  /* Post the error on the alignment clause if any.  */
+  if (Present (Alignment_Clause (gnat_entity)))
+    gnat_error_node = Expression (Alignment_Clause (gnat_entity));
+  else
+    gnat_error_node = gnat_entity;
+
+  /* Within GCC, an alignment is an integer, so we must make sure a value is
+     specified that fits in that range.  Also, there is an upper bound to
+     alignments we can support/allow.  */
+  if (!UI_Is_In_Int_Range (alignment)
+      || ((new_align = UI_To_Int (alignment)) > max_allowed_alignment))
+    post_error_ne_num ("largest supported alignment for& is ^",
+		       gnat_error_node, gnat_entity, max_allowed_alignment);
+  else if (!(Present (Alignment_Clause (gnat_entity))
+	     && From_At_Mod (Alignment_Clause (gnat_entity)))
+	   && new_align * BITS_PER_UNIT < align)
+    post_error_ne_num ("alignment for& must be at least ^",
+		       gnat_error_node, gnat_entity,
+		       align / BITS_PER_UNIT);
+  else
+    {
+      new_align = (new_align > 0 ? new_align * BITS_PER_UNIT : 1);
+      if (new_align > align)
+	align = new_align;
+    }
+
+  return align;
+}
+
+/* Return the smallest alignment not less than SIZE.  */
+
+static unsigned int
+ceil_alignment (unsigned HOST_WIDE_INT size)
+{
+  return (unsigned int) 1 << (floor_log2 (size - 1) + 1);
+}
+
+/* Verify that OBJECT, a type or decl, is something we can implement
+   atomically.  If not, give an error for GNAT_ENTITY.  COMP_P is true
+   if we require atomic components.  */
+
+static void
+check_ok_for_atomic (tree object, Entity_Id gnat_entity, bool comp_p)
+{
+  Node_Id gnat_error_point = gnat_entity;
+  Node_Id gnat_node;
+  enum machine_mode mode;
+  unsigned int align;
+  tree size;
+
+  /* There are three case of what OBJECT can be.  It can be a type, in which
+     case we take the size, alignment and mode from the type.  It can be a
+     declaration that was indirect, in which case the relevant values are
+     that of the type being pointed to, or it can be a normal declaration,
+     in which case the values are of the decl.  The code below assumes that
+     OBJECT is either a type or a decl.  */
+  if (TYPE_P (object))
+    {
+      mode = TYPE_MODE (object);
+      align = TYPE_ALIGN (object);
+      size = TYPE_SIZE (object);
+    }
+  else if (DECL_BY_REF_P (object))
+    {
+      mode = TYPE_MODE (TREE_TYPE (TREE_TYPE (object)));
+      align = TYPE_ALIGN (TREE_TYPE (TREE_TYPE (object)));
+      size = TYPE_SIZE (TREE_TYPE (TREE_TYPE (object)));
+    }
+  else
+    {
+      mode = DECL_MODE (object);
+      align = DECL_ALIGN (object);
+      size = DECL_SIZE (object);
+    }
+
+  /* Consider all floating-point types atomic and any types that that are
+     represented by integers no wider than a machine word.  */
+  if (GET_MODE_CLASS (mode) == MODE_FLOAT
+      || ((GET_MODE_CLASS (mode) == MODE_INT
+	   || GET_MODE_CLASS (mode) == MODE_PARTIAL_INT)
+	  && GET_MODE_BITSIZE (mode) <= BITS_PER_WORD))
+    return;
+
+  /* For the moment, also allow anything that has an alignment equal
+     to its size and which is smaller than a word.  */
+  if (size && TREE_CODE (size) == INTEGER_CST
+      && compare_tree_int (size, align) == 0
+      && align <= BITS_PER_WORD)
+    return;
+
+  for (gnat_node = First_Rep_Item (gnat_entity); Present (gnat_node);
+       gnat_node = Next_Rep_Item (gnat_node))
+    {
+      if (!comp_p && Nkind (gnat_node) == N_Pragma
+	  && (Get_Pragma_Id (Chars (Pragma_Identifier (gnat_node)))
+              == Pragma_Atomic))
+	gnat_error_point = First (Pragma_Argument_Associations (gnat_node));
+      else if (comp_p && Nkind (gnat_node) == N_Pragma
+	       && (Get_Pragma_Id (Chars (Pragma_Identifier (gnat_node)))
+		   == Pragma_Atomic_Components))
+	gnat_error_point = First (Pragma_Argument_Associations (gnat_node));
+    }
+
+  if (comp_p)
+    post_error_ne ("atomic access to component of & cannot be guaranteed",
+		   gnat_error_point, gnat_entity);
+  else
+    post_error_ne ("atomic access to & cannot be guaranteed",
+		   gnat_error_point, gnat_entity);
+}
+
+/* Check if FTYPE1 and FTYPE2, two potentially different function type nodes,
+   have compatible signatures so that a call using one type may be safely
+   issued if the actual target function type is the other. Return 1 if it is
+   the case, 0 otherwise, and post errors on the incompatibilities.
+
+   This is used when an Ada subprogram is mapped onto a GCC builtin, to ensure
+   that calls to the subprogram will have arguments suitable for the later
+   underlying builtin expansion.  */
+
+static int
+compatible_signatures_p (tree ftype1, tree ftype2)
+{
+  /* As of now, we only perform very trivial tests and consider it's the
+     programmer's responsibility to ensure the type correctness in the Ada
+     declaration, as in the regular Import cases.
+
+     Mismatches typically result in either error messages from the builtin
+     expander, internal compiler errors, or in a real call sequence.  This
+     should be refined to issue diagnostics helping error detection and
+     correction.  */
+
+  /* Almost fake test, ensuring a use of each argument.  */
+  if (ftype1 == ftype2)
+    return 1;
+
+  return 1;
+}
+
+/* Given a type T, a FIELD_DECL F, and a replacement value R, return a new
+   type with all size expressions that contain F updated by replacing F
+   with R.  If F is NULL_TREE, always make a new RECORD_TYPE, even if
+   nothing has changed.  */
+
+tree
+substitute_in_type (tree t, tree f, tree r)
+{
+  tree new = t;
+  tree tem;
+
+  switch (TREE_CODE (t))
+    {
+    case INTEGER_TYPE:
+    case ENUMERAL_TYPE:
+    case BOOLEAN_TYPE:
+      if (CONTAINS_PLACEHOLDER_P (TYPE_MIN_VALUE (t))
+	  || CONTAINS_PLACEHOLDER_P (TYPE_MAX_VALUE (t)))
+	{
+	  tree low = SUBSTITUTE_IN_EXPR (TYPE_MIN_VALUE (t), f, r);
+	  tree high = SUBSTITUTE_IN_EXPR (TYPE_MAX_VALUE (t), f, r);
+
+	  if (low == TYPE_MIN_VALUE (t) && high == TYPE_MAX_VALUE (t))
+	    return t;
+
+	  new = build_range_type (TREE_TYPE (t), low, high);
+	  if (TYPE_INDEX_TYPE (t))
+	    SET_TYPE_INDEX_TYPE
+	      (new, substitute_in_type (TYPE_INDEX_TYPE (t), f, r));
+	  return new;
+	}
+
+      return t;
+
+    case REAL_TYPE:
+      if (CONTAINS_PLACEHOLDER_P (TYPE_MIN_VALUE (t))
+	  || CONTAINS_PLACEHOLDER_P (TYPE_MAX_VALUE (t)))
+	{
+	  tree low = NULL_TREE, high = NULL_TREE;
+
+	  if (TYPE_MIN_VALUE (t))
+	    low = SUBSTITUTE_IN_EXPR (TYPE_MIN_VALUE (t), f, r);
+	  if (TYPE_MAX_VALUE (t))
+	    high = SUBSTITUTE_IN_EXPR (TYPE_MAX_VALUE (t), f, r);
+
+	  if (low == TYPE_MIN_VALUE (t) && high == TYPE_MAX_VALUE (t))
+	    return t;
+
+	  t = copy_type (t);
+	  TYPE_MIN_VALUE (t) = low;
+	  TYPE_MAX_VALUE (t) = high;
+	}
+      return t;
+
+    case COMPLEX_TYPE:
+      tem = substitute_in_type (TREE_TYPE (t), f, r);
+      if (tem == TREE_TYPE (t))
+	return t;
+
+      return build_complex_type (tem);
+
+    case OFFSET_TYPE:
+    case METHOD_TYPE:
+    case FUNCTION_TYPE:
+    case LANG_TYPE:
+      /* Don't know how to do these yet.  */
+      gcc_unreachable ();
+
+    case ARRAY_TYPE:
+      {
+	tree component = substitute_in_type (TREE_TYPE (t), f, r);
+	tree domain = substitute_in_type (TYPE_DOMAIN (t), f, r);
+
+	if (component == TREE_TYPE (t) && domain == TYPE_DOMAIN (t))
+	  return t;
+
+	new = build_array_type (component, domain);
+	TYPE_SIZE (new) = 0;
+	TYPE_MULTI_ARRAY_P (new) = TYPE_MULTI_ARRAY_P (t);
+	TYPE_CONVENTION_FORTRAN_P (new) = TYPE_CONVENTION_FORTRAN_P (t);
+	layout_type (new);
+	TYPE_ALIGN (new) = TYPE_ALIGN (t);
+	TYPE_USER_ALIGN (new) = TYPE_USER_ALIGN (t);
+
+	/* If we had bounded the sizes of T by a constant, bound the sizes of
+	   NEW by the same constant.  */
+	if (TREE_CODE (TYPE_SIZE (t)) == MIN_EXPR)
+	  TYPE_SIZE (new)
+	    = size_binop (MIN_EXPR, TREE_OPERAND (TYPE_SIZE (t), 1),
+			  TYPE_SIZE (new));
+	if (TREE_CODE (TYPE_SIZE_UNIT (t)) == MIN_EXPR)
+	  TYPE_SIZE_UNIT (new)
+	    = size_binop (MIN_EXPR, TREE_OPERAND (TYPE_SIZE_UNIT (t), 1),
+			  TYPE_SIZE_UNIT (new));
+	return new;
+      }
+
+    case RECORD_TYPE:
+    case UNION_TYPE:
+    case QUAL_UNION_TYPE:
+      {
+	tree field;
+	bool changed_field
+	  = (f == NULL_TREE && !TREE_CONSTANT (TYPE_SIZE (t)));
+	bool field_has_rep = false;
+	tree last_field = NULL_TREE;
+
+	tree new = copy_type (t);
+
+	/* Start out with no fields, make new fields, and chain them
+	   in.  If we haven't actually changed the type of any field,
+	   discard everything we've done and return the old type.  */
+
+	TYPE_FIELDS (new) = NULL_TREE;
+	TYPE_SIZE (new) = NULL_TREE;
+
+	for (field = TYPE_FIELDS (t); field; field = TREE_CHAIN (field))
+	  {
+	    tree new_field = copy_node (field);
+
+	    TREE_TYPE (new_field)
+	      = substitute_in_type (TREE_TYPE (new_field), f, r);
+
+	    if (DECL_HAS_REP_P (field) && !DECL_INTERNAL_P (field))
+	      field_has_rep = true;
+	    else if (TREE_TYPE (new_field) != TREE_TYPE (field))
+	      changed_field = true;
+
+	    /* If this is an internal field and the type of this field is
+	       a UNION_TYPE or RECORD_TYPE with no elements, ignore it.  If
+	       the type just has one element, treat that as the field.
+	       But don't do this if we are processing a QUAL_UNION_TYPE.  */
+	    if (TREE_CODE (t) != QUAL_UNION_TYPE
+		&& DECL_INTERNAL_P (new_field)
+		&& (TREE_CODE (TREE_TYPE (new_field)) == UNION_TYPE
+		    || TREE_CODE (TREE_TYPE (new_field)) == RECORD_TYPE))
+	      {
+		if (!TYPE_FIELDS (TREE_TYPE (new_field)))
+		  continue;
+
+		if (!TREE_CHAIN (TYPE_FIELDS (TREE_TYPE (new_field))))
+		  {
+		    tree next_new_field
+		      = copy_node (TYPE_FIELDS (TREE_TYPE (new_field)));
+
+		    /* Make sure omitting the union doesn't change
+		       the layout.  */
+		    DECL_ALIGN (next_new_field) = DECL_ALIGN (new_field);
+		    new_field = next_new_field;
+		  }
+	      }
+
+	    DECL_CONTEXT (new_field) = new;
+	    SET_DECL_ORIGINAL_FIELD (new_field,
+				     (DECL_ORIGINAL_FIELD (field)
+				      ? DECL_ORIGINAL_FIELD (field) : field));
+
+	    /* If the size of the old field was set at a constant,
+	       propagate the size in case the type's size was variable.
+	       (This occurs in the case of a variant or discriminated
+	       record with a default size used as a field of another
+	       record.)  */
+	    DECL_SIZE (new_field)
+	      = TREE_CODE (DECL_SIZE (field)) == INTEGER_CST
+		? DECL_SIZE (field) : NULL_TREE;
+	    DECL_SIZE_UNIT (new_field)
+	      = TREE_CODE (DECL_SIZE_UNIT (field)) == INTEGER_CST
+		? DECL_SIZE_UNIT (field) : NULL_TREE;
+
+	    if (TREE_CODE (t) == QUAL_UNION_TYPE)
+	      {
+		tree new_q = SUBSTITUTE_IN_EXPR (DECL_QUALIFIER (field), f, r);
+
+		if (new_q != DECL_QUALIFIER (new_field))
+		  changed_field = true;
+
+		/* Do the substitution inside the qualifier and if we find
+		   that this field will not be present, omit it.  */
+		DECL_QUALIFIER (new_field) = new_q;
+
+		if (integer_zerop (DECL_QUALIFIER (new_field)))
+		  continue;
+	      }
+
+	    if (!last_field)
+	      TYPE_FIELDS (new) = new_field;
+	    else
+	      TREE_CHAIN (last_field) = new_field;
+
+	    last_field = new_field;
+
+	    /* If this is a qualified type and this field will always be
+	       present, we are done.  */
+	    if (TREE_CODE (t) == QUAL_UNION_TYPE
+		&& integer_onep (DECL_QUALIFIER (new_field)))
+	      break;
+	  }
+
+	/* If this used to be a qualified union type, but we now know what
+	   field will be present, make this a normal union.  */
+	if (changed_field && TREE_CODE (new) == QUAL_UNION_TYPE
+	    && (!TYPE_FIELDS (new)
+		|| integer_onep (DECL_QUALIFIER (TYPE_FIELDS (new)))))
+	  TREE_SET_CODE (new, UNION_TYPE);
+	else if (!changed_field)
+	  return t;
+
+	gcc_assert (!field_has_rep);
+	layout_type (new);
+
+	/* If the size was originally a constant use it.  */
+	if (TYPE_SIZE (t) && TREE_CODE (TYPE_SIZE (t)) == INTEGER_CST
+	    && TREE_CODE (TYPE_SIZE (new)) != INTEGER_CST)
+	  {
+	    TYPE_SIZE (new) = TYPE_SIZE (t);
+	    TYPE_SIZE_UNIT (new) = TYPE_SIZE_UNIT (t);
+	    SET_TYPE_ADA_SIZE (new, TYPE_ADA_SIZE (t));
+	  }
+
+	return new;
+      }
+
+    default:
+      return t;
+    }
+}
+
+/* Return the "RM size" of GNU_TYPE.  This is the actual number of bits
+   needed to represent the object.  */
+
+tree
+rm_size (tree gnu_type)
+{
+  /* For integer types, this is the precision.  For record types, we store
+     the size explicitly.  For other types, this is just the size.  */
+
+  if (INTEGRAL_TYPE_P (gnu_type) && TYPE_RM_SIZE (gnu_type))
+    return TYPE_RM_SIZE (gnu_type);
+  else if (TREE_CODE (gnu_type) == RECORD_TYPE
+	   && TYPE_CONTAINS_TEMPLATE_P (gnu_type))
+    /* Return the rm_size of the actual data plus the size of the template.  */
+    return
+      size_binop (PLUS_EXPR,
+		  rm_size (TREE_TYPE (TREE_CHAIN (TYPE_FIELDS (gnu_type)))),
+		  DECL_SIZE (TYPE_FIELDS (gnu_type)));
+  else if ((TREE_CODE (gnu_type) == RECORD_TYPE
+	    || TREE_CODE (gnu_type) == UNION_TYPE
+	    || TREE_CODE (gnu_type) == QUAL_UNION_TYPE)
+	   && !TYPE_IS_FAT_POINTER_P (gnu_type)
+	   && TYPE_ADA_SIZE (gnu_type))
+    return TYPE_ADA_SIZE (gnu_type);
+  else
+    return TYPE_SIZE (gnu_type);
+}
+
+/* Return an identifier representing the external name to be used for
+   GNAT_ENTITY.  If SUFFIX is specified, the name is followed by "___"
+   and the specified suffix.  */
+
+tree
+create_concat_name (Entity_Id gnat_entity, const char *suffix)
+{
+  Entity_Kind kind = Ekind (gnat_entity);
+
+  const char *str = (!suffix ? "" : suffix);
+  String_Template temp = {1, strlen (str)};
+  Fat_Pointer fp = {str, &temp};
+
+  Get_External_Name_With_Suffix (gnat_entity, fp);
+
+  /* A variable using the Stdcall convention (meaning we are running
+     on a Windows box) live in a DLL. Here we adjust its name to use
+     the jump-table, the _imp__NAME contains the address for the NAME
+     variable. */
+  if ((kind == E_Variable || kind == E_Constant)
+      && Has_Stdcall_Convention (gnat_entity))
+    {
+      const char *prefix = "_imp__";
+      int k, plen = strlen (prefix);
+
+      for (k = 0; k <= Name_Len; k++)
+	Name_Buffer [Name_Len - k + plen] = Name_Buffer [Name_Len - k];
+      strncpy (Name_Buffer, prefix, plen);
+    }
+
+  return get_identifier (Name_Buffer);
+}
+
+/* Return the name to be used for GNAT_ENTITY.  If a type, create a
+   fully-qualified name, possibly with type information encoding.
+   Otherwise, return the name.  */
+
+tree
+get_entity_name (Entity_Id gnat_entity)
+{
+  Get_Encoded_Name (gnat_entity);
+  return get_identifier (Name_Buffer);
+}
+
+/* Given GNU_ID, an IDENTIFIER_NODE containing a name and SUFFIX, a
+   string, return a new IDENTIFIER_NODE that is the concatenation of
+   the name in GNU_ID and SUFFIX.  */
+
+tree
+concat_id_with_name (tree gnu_id, const char *suffix)
+{
+  int len = IDENTIFIER_LENGTH (gnu_id);
+
+  strncpy (Name_Buffer, IDENTIFIER_POINTER (gnu_id), len);
+  strncpy (Name_Buffer + len, "___", 3);
+  len += 3;
+  strcpy (Name_Buffer + len, suffix);
+  return get_identifier (Name_Buffer);
+}
+
+#include "gt-ada-decl.h"
diff --git a/gcc/ada/gcc-interface/deftarg.c b/gcc/ada/gcc-interface/deftarg.c
new file mode 100644
index 00000000000..28c7db5f702
--- /dev/null
+++ b/gcc/ada/gcc-interface/deftarg.c
@@ -0,0 +1,40 @@
+/****************************************************************************
+ *                                                                          *
+ *                         GNAT COMPILER COMPONENTS                         *
+ *                                                                          *
+ *                             D E F T A R G                                *
+ *                                                                          *
+ *                                  Body                                    *
+ *                                                                          *
+ *          Copyright (C) 1992-2003 Free Software Foundation, Inc.          *
+ *                                                                          *
+ * GNAT is free software;  you can  redistribute it  and/or modify it under *
+ * terms of the  GNU General Public License as published  by the Free Soft- *
+ * ware  Foundation;  either version 2,  or (at your option) any later ver- *
+ * sion.  GNAT is distributed in the hope that it will be useful, but WITH- *
+ * OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY *
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License *
+ * for  more details.  You should have  received  a copy of the GNU General *
+ * Public License  distributed with GNAT;  see file COPYING.  If not, write *
+ * to  the  Free Software Foundation,  51  Franklin  Street,  Fifth  Floor, *
+ * Boston, MA 02110-1301, USA.                                              *
+ *                                                                          *
+ * As a  special  exception,  if you  link  this file  with other  files to *
+ * produce an executable,  this file does not by itself cause the resulting *
+ * executable to be covered by the GNU General Public License. This except- *
+ * ion does not  however invalidate  any other reasons  why the  executable *
+ * file might be covered by the  GNU Public License.                        *
+ *                                                                          *
+ * GNAT was originally developed  by the GNAT team at  New York University. *
+ * Extensive contributions were provided by Ada Core Technologies Inc.      *
+ *                                                                          *
+ ****************************************************************************/
+
+/* Include a default definition for TARGET_FLAGS for gnatpsta.  */
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
+
+int target_flags = TARGET_DEFAULT;
diff --git a/gcc/ada/gcc-interface/gigi.h b/gcc/ada/gcc-interface/gigi.h
new file mode 100644
index 00000000000..aaf5e7f8d8f
--- /dev/null
+++ b/gcc/ada/gcc-interface/gigi.h
@@ -0,0 +1,905 @@
+/****************************************************************************
+ *                                                                          *
+ *                         GNAT COMPILER COMPONENTS                         *
+ *                                                                          *
+ *                                 G I G I                                  *
+ *                                                                          *
+ *                              C Header File                               *
+ *                                                                          *
+ *          Copyright (C) 1992-2008, Free Software Foundation, Inc.         *
+ *                                                                          *
+ * GNAT is free software;  you can  redistribute it  and/or modify it under *
+ * terms of the  GNU General Public License as published  by the Free Soft- *
+ * ware  Foundation;  either version 2,  or (at your option) any later ver- *
+ * sion.  GNAT is distributed in the hope that it will be useful, but WITH- *
+ * OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY *
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License *
+ * for  more details.  You should have  received  a copy of the GNU General *
+ * Public License  distributed with GNAT;  see file COPYING.  If not, write *
+ * to  the  Free Software Foundation,  51  Franklin  Street,  Fifth  Floor, *
+ * Boston, MA 02110-1301, USA.                                              *
+ *                                                                          *
+ * As a  special  exception,  if you  link  this file  with other  files to *
+ * produce an executable,  this file does not by itself cause the resulting *
+ * executable to be covered by the GNU General Public License. This except- *
+ * ion does not  however invalidate  any other reasons  why the  executable *
+ * file might be covered by the  GNU Public License.                        *
+ *                                                                          *
+ * GNAT was originally developed  by the GNAT team at  New York University. *
+ * Extensive contributions were provided by Ada Core Technologies Inc.      *
+ *                                                                          *
+ ****************************************************************************/
+
+/* Declare all functions and types used by gigi.  */
+
+/* The largest alignment, in bits, that is needed for using the widest
+   move instruction.  */
+extern unsigned int largest_move_alignment;
+
+/* Compute the alignment of the largest mode that can be used for copying
+   objects.  */
+extern void gnat_compute_largest_alignment (void);
+
+/* GNU_TYPE is a type. Determine if it should be passed by reference by
+   default.  */
+extern bool default_pass_by_ref (tree gnu_type);
+
+/* GNU_TYPE is the type of a subprogram parameter.  Determine from the type
+   if it should be passed by reference.  */
+extern bool must_pass_by_ref (tree gnu_type);
+
+/* Initialize DUMMY_NODE_TABLE.  */
+extern void init_dummy_type (void);
+
+/* Given GNAT_ENTITY, an entity in the incoming GNAT tree, return a
+   GCC type corresponding to that entity.  GNAT_ENTITY is assumed to
+   refer to an Ada type.  */
+extern tree gnat_to_gnu_type (Entity_Id gnat_entity);
+
+/* Given GNAT_ENTITY, a GNAT defining identifier node, which denotes some Ada
+   entity, this routine returns the equivalent GCC tree for that entity
+   (an ..._DECL node) and associates the ..._DECL node with the input GNAT
+   defining identifier.
+
+   If GNAT_ENTITY is a variable or a constant declaration, GNU_EXPR gives its
+   initial value (in GCC tree form). This is optional for variables.
+   For renamed entities, GNU_EXPR gives the object being renamed.
+
+   DEFINITION is nonzero if this call is intended for a definition.  This is
+   used for separate compilation where it necessary to know whether an
+   external declaration or a definition should be created if the GCC equivalent
+   was not created previously.  The value of 1 is normally used for a nonzero
+   DEFINITION, but a value of 2 is used in special circumstances, defined in
+   the code.  */
+extern tree gnat_to_gnu_entity (Entity_Id gnat_entity, tree gnu_expr,
+                                int definition);
+
+/* Similar, but if the returned value is a COMPONENT_REF, return the
+   FIELD_DECL.  */
+extern tree gnat_to_gnu_field_decl (Entity_Id gnat_entity);
+
+/* Wrap up compilation of T, a TYPE_DECL, possibly deferring it.  */
+extern void rest_of_type_decl_compilation (tree t);
+
+/* Start a new statement group chained to the previous group.  */
+extern void start_stmt_group (void);
+
+/* Add GNU_STMT to the current BLOCK_STMT node.  */
+extern void add_stmt (tree gnu_stmt);
+
+/* Similar, but set the location of GNU_STMT to that of GNAT_NODE.  */
+extern void add_stmt_with_node (tree gnu_stmt, Node_Id gnat_node);
+
+/* Return code corresponding to the current code group.  It is normally
+   a STATEMENT_LIST, but may also be a BIND_EXPR or TRY_FINALLY_EXPR if
+   BLOCK or cleanups were set.  */
+extern tree end_stmt_group (void);
+
+/* Set the BLOCK node corresponding to the current code group to GNU_BLOCK.  */
+extern void set_block_for_group (tree);
+
+/* Add a declaration statement for GNU_DECL to the current BLOCK_STMT node.
+   Get SLOC from GNAT_ENTITY.  */
+extern void add_decl_expr (tree gnu_decl, Entity_Id gnat_entity);
+
+/* Mark nodes rooted at *TP with TREE_VISITED and types as having their
+   sized gimplified.  We use this to indicate all variable sizes and
+   positions in global types may not be shared by any subprogram.  */
+extern void mark_visited (tree *);
+
+/* Finalize any From_With_Type incomplete types.  We do this after processing
+   our compilation unit and after processing its spec, if this is a body.  */
+extern void finalize_from_with_types (void);
+
+/* Return the equivalent type to be used for GNAT_ENTITY, if it's a
+   kind of type (such E_Task_Type) that has a different type which Gigi
+   uses for its representation.  If the type does not have a special type
+   for its representation, return GNAT_ENTITY.  If a type is supposed to
+   exist, but does not, abort unless annotating types, in which case
+   return Empty.   If GNAT_ENTITY is Empty, return Empty.  */
+extern Entity_Id Gigi_Equivalent_Type (Entity_Id);
+
+/* Given GNAT_ENTITY, elaborate all expressions that are required to
+   be elaborated at the point of its definition, but do nothing else.  */
+extern void elaborate_entity (Entity_Id gnat_entity);
+
+/* Mark GNAT_ENTITY as going out of scope at this point.  Recursively mark
+   any entities on its entity chain similarly.  */
+extern void mark_out_of_scope (Entity_Id gnat_entity);
+
+/* Make a dummy type corresponding to GNAT_TYPE.  */
+extern tree make_dummy_type (Entity_Id gnat_type);
+
+/* Get the unpadded version of a GNAT type.  */
+extern tree get_unpadded_type (Entity_Id gnat_entity);
+
+/* Called when we need to protect a variable object using a save_expr.  */
+extern tree maybe_variable (tree gnu_operand);
+
+/* Create a record type that contains a SIZE bytes long field of TYPE with a
+    starting bit position so that it is aligned to ALIGN bits, and leaving at
+    least ROOM bytes free before the field.  BASE_ALIGN is the alignment the
+    record is guaranteed to get.  */
+extern tree make_aligning_type (tree type, unsigned int align, tree size,
+				unsigned int base_align, int room);
+
+/* Ensure that TYPE has SIZE and ALIGN.  Make and return a new padded type
+   if needed.  We have already verified that SIZE and TYPE are large enough.
+
+   GNAT_ENTITY and NAME_TRAILER are used to name the resulting record and
+   to issue a warning.
+
+   IS_USER_TYPE is true if we must be sure we complete the original type.
+
+   DEFINITION is true if this type is being defined.
+
+   SAME_RM_SIZE is true if the RM_Size of the resulting type is to be
+   set to its TYPE_SIZE; otherwise, it's set to the RM_Size of the original
+   type.  */
+extern tree maybe_pad_type (tree type, tree size, unsigned int align,
+                            Entity_Id gnat_entity, const char *name_trailer,
+			    bool is_user_type, bool definition,
+                            bool same_rm_size);
+
+/* Given a GNU tree and a GNAT list of choices, generate an expression to test
+   the value passed against the list of choices.  */
+extern tree choices_to_gnu (tree operand, Node_Id choices);
+
+/* Given a type T, a FIELD_DECL F, and a replacement value R, return a new
+   type with all size expressions that contain F updated by replacing F
+   with R.  If F is NULL_TREE, always make a new RECORD_TYPE, even if
+   nothing has changed.  */
+extern tree substitute_in_type (tree t, tree f, tree r);
+
+/* Return the "RM size" of GNU_TYPE.  This is the actual number of bits
+   needed to represent the object.  */
+extern tree rm_size (tree gnu_type);
+
+/* Given GNU_ID, an IDENTIFIER_NODE containing a name, and SUFFIX, a
+   string, return a new IDENTIFIER_NODE that is the concatenation of
+   the name in GNU_ID and SUFFIX.  */
+extern tree concat_id_with_name (tree gnu_id, const char *suffix);
+
+/* Return the name to be used for GNAT_ENTITY.  If a type, create a
+   fully-qualified name, possibly with type information encoding.
+   Otherwise, return the name.  */
+extern tree get_entity_name (Entity_Id gnat_entity);
+
+/* Return a name for GNAT_ENTITY concatenated with two underscores and
+   SUFFIX.  */
+extern tree create_concat_name (Entity_Id gnat_entity, const char *suffix);
+
+/* If true, then gigi is being called on an analyzed but unexpanded tree, and
+   the only purpose of the call is to properly annotate types with
+   representation information.  */
+extern bool type_annotate_only;
+
+/* Current file name without path */
+extern const char *ref_filename;
+
+/* This structure must be kept synchronized with Call_Back_End.  */
+struct File_Info_Type
+{
+  File_Name_Type File_Name;
+  Nat Num_Source_Lines;
+};
+
+/* This is the main program of the back-end.  It sets up all the table
+   structures and then generates code.
+
+   ??? Needs parameter descriptions  */
+
+extern void gigi (Node_Id gnat_root, int max_gnat_node, int number_name,
+                  struct Node *nodes_ptr, Node_Id *next_node_ptr,
+                  Node_Id *prev_node_ptr, struct Elist_Header *elists_ptr,
+                  struct Elmt_Item *elmts_ptr,
+                  struct String_Entry *strings_ptr,
+                  Char_Code *strings_chars_ptr,
+                  struct List_Header *list_headers_ptr,
+                  Nat number_file,
+                  struct File_Info_Type *file_info_ptr,
+                  Entity_Id standard_integer,
+                  Entity_Id standard_long_long_float,
+                  Entity_Id standard_exception_type,
+                  Int gigi_operating_mode);
+
+/* GNAT_NODE is the root of some GNAT tree.  Return the root of the
+   GCC tree corresponding to that GNAT tree.  Normally, no code is generated;
+   we just return an equivalent tree which is used elsewhere to generate
+   code.  */
+extern tree gnat_to_gnu (Node_Id gnat_node);
+
+/* GNU_STMT is a statement.  We generate code for that statement.  */
+extern void gnat_expand_stmt (tree gnu_stmt);
+
+/* ??? missing documentation */
+extern int gnat_gimplify_expr (tree *expr_p, gimple_seq *pre_p,
+                               gimple_seq *post_p ATTRIBUTE_UNUSED);
+
+/* Do the processing for the declaration of a GNAT_ENTITY, a type.  If
+   a separate Freeze node exists, delay the bulk of the processing.  Otherwise
+   make a GCC type for GNAT_ENTITY and set up the correspondence.  */
+extern void process_type (Entity_Id gnat_entity);
+
+/* Convert SLOC into LOCUS.  Return true if SLOC corresponds to a source code
+   location and false if it doesn't.  In the former case, set the Gigi global
+   variable REF_FILENAME to the simple debug file name as given by sinput.  */
+extern bool Sloc_to_locus (Source_Ptr Sloc, location_t *locus);
+
+/* Post an error message.  MSG is the error message, properly annotated.
+   NODE is the node at which to post the error and the node to use for the
+   "&" substitution.  */
+extern void post_error (const char *, Node_Id);
+
+/* Similar, but NODE is the node at which to post the error and ENT
+   is the node to use for the "&" substitution.  */
+extern void post_error_ne (const char *msg, Node_Id node, Entity_Id ent);
+
+/* Similar, but NODE is the node at which to post the error, ENT is the node
+   to use for the "&" substitution, and N is the number to use for the ^.  */
+extern void post_error_ne_num (const char *msg, Node_Id node, Entity_Id ent,
+                               int n);
+
+/* Similar to post_error_ne_num, but T is a GCC tree representing the number
+   to write.  If the tree represents a constant that fits within a
+   host integer, the text inside curly brackets in MSG will be output
+   (presumably including a '^').  Otherwise that text will not be output
+   and the text inside square brackets will be output instead.  */
+extern void post_error_ne_tree (const char *msg, Node_Id node, Entity_Id ent,
+                                tree t);
+
+/* Similar to post_error_ne_tree, except that NUM is a second
+   integer to write in the message.  */
+extern void post_error_ne_tree_2 (const char *msg, Node_Id node, Entity_Id ent,
+                                  tree t, int num);
+
+/* Protect EXP from multiple evaluation.  This may make a SAVE_EXPR.  */
+extern tree protect_multiple_eval (tree exp);
+
+/* Return a label to branch to for the exception type in KIND or NULL_TREE
+   if none.  */
+extern tree get_exception_label (char);
+
+/* Current node being treated, in case gigi_abort or Check_Elaboration_Code
+   called.  */
+extern Node_Id error_gnat_node;
+
+/* This is equivalent to stabilize_reference in tree.c, but we know how to
+   handle our own nodes and we take extra arguments.  FORCE says whether to
+   force evaluation of everything.  We set SUCCESS to true unless we walk
+   through something we don't know how to stabilize.  */
+extern tree maybe_stabilize_reference (tree ref, bool force, bool *success);
+
+/* Highest number in the front-end node table.  */
+extern int max_gnat_nodes;
+
+/* If nonzero, pretend we are allocating at global level.  */
+extern int force_global;
+
+/* Standard data type sizes.  Most of these are not used.  */
+
+#ifndef CHAR_TYPE_SIZE
+#define CHAR_TYPE_SIZE BITS_PER_UNIT
+#endif
+
+#ifndef SHORT_TYPE_SIZE
+#define SHORT_TYPE_SIZE (BITS_PER_UNIT * MIN ((UNITS_PER_WORD + 1) / 2, 2))
+#endif
+
+#ifndef INT_TYPE_SIZE
+#define INT_TYPE_SIZE BITS_PER_WORD
+#endif
+
+#ifndef LONG_TYPE_SIZE
+#define LONG_TYPE_SIZE BITS_PER_WORD
+#endif
+
+#ifndef LONG_LONG_TYPE_SIZE
+#define LONG_LONG_TYPE_SIZE (BITS_PER_WORD * 2)
+#endif
+
+#ifndef FLOAT_TYPE_SIZE
+#define FLOAT_TYPE_SIZE BITS_PER_WORD
+#endif
+
+#ifndef DOUBLE_TYPE_SIZE
+#define DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
+#endif
+
+#ifndef LONG_DOUBLE_TYPE_SIZE
+#define LONG_DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
+#endif
+
+/* The choice of SIZE_TYPE here is very problematic.  We need a signed
+   type whose bit width is Pmode.  Assume "long" is such a type here.  */
+#undef SIZE_TYPE
+#define SIZE_TYPE "long int"
+
+/* Data structures used to represent attributes.  */
+
+enum attr_type
+{
+  ATTR_MACHINE_ATTRIBUTE,
+  ATTR_LINK_ALIAS,
+  ATTR_LINK_SECTION,
+  ATTR_LINK_CONSTRUCTOR,
+  ATTR_LINK_DESTRUCTOR,
+  ATTR_WEAK_EXTERNAL
+};
+
+struct attrib
+{
+  struct attrib *next;
+  enum attr_type type;
+  tree name;
+  tree args;
+  Node_Id error_point;
+};
+
+/* Table of machine-independent internal attributes.  */
+extern const struct attribute_spec gnat_internal_attribute_table[];
+
+/* Define the entries in the standard data array.  */
+enum standard_datatypes
+{
+/* Various standard data types and nodes.  */
+  ADT_longest_float_type,
+  ADT_void_type_decl,
+
+  /* The type of an exception.  */
+  ADT_except_type,
+
+  /* Type declaration node  <==> typedef void *T */
+  ADT_ptr_void_type,
+
+  /* Function type declaration -- void T() */
+  ADT_void_ftype,
+
+  /* Type declaration node  <==> typedef void *T() */
+  ADT_ptr_void_ftype,
+
+  /* Type declaration node  <==> typedef virtual void *T() */
+  ADT_fdesc_type,
+
+  /* Null pointer for above type */
+  ADT_null_fdesc,
+
+  /* Function declaration nodes for run-time functions for allocating memory.
+     Ada allocators cause calls to these functions to be generated.  Malloc32
+     is used only on 64bit systems needing to allocate 32bit memory. */
+  ADT_malloc_decl,
+  ADT_malloc32_decl,
+
+  /* Likewise for freeing memory.  */
+  ADT_free_decl,
+
+  /* Types and decls used by our temporary exception mechanism.  See
+     init_gigi_decls for details.  */
+  ADT_jmpbuf_type,
+  ADT_jmpbuf_ptr_type,
+  ADT_get_jmpbuf_decl,
+  ADT_set_jmpbuf_decl,
+  ADT_get_excptr_decl,
+  ADT_setjmp_decl,
+  ADT_longjmp_decl,
+  ADT_update_setjmp_buf_decl,
+  ADT_raise_nodefer_decl,
+  ADT_begin_handler_decl,
+  ADT_end_handler_decl,
+  ADT_others_decl,
+  ADT_all_others_decl,
+  ADT_LAST};
+
+extern GTY(()) tree gnat_std_decls[(int) ADT_LAST];
+extern GTY(()) tree gnat_raise_decls[(int) LAST_REASON_CODE + 1];
+
+#define longest_float_type_node gnat_std_decls[(int) ADT_longest_float_type]
+#define void_type_decl_node gnat_std_decls[(int) ADT_void_type_decl]
+#define except_type_node gnat_std_decls[(int) ADT_except_type]
+#define ptr_void_type_node gnat_std_decls[(int) ADT_ptr_void_type]
+#define void_ftype gnat_std_decls[(int) ADT_void_ftype]
+#define ptr_void_ftype gnat_std_decls[(int) ADT_ptr_void_ftype]
+#define fdesc_type_node gnat_std_decls[(int) ADT_fdesc_type]
+#define null_fdesc_node gnat_std_decls[(int) ADT_null_fdesc]
+#define malloc_decl gnat_std_decls[(int) ADT_malloc_decl]
+#define malloc32_decl gnat_std_decls[(int) ADT_malloc32_decl]
+#define free_decl gnat_std_decls[(int) ADT_free_decl]
+#define jmpbuf_type gnat_std_decls[(int) ADT_jmpbuf_type]
+#define jmpbuf_ptr_type gnat_std_decls[(int) ADT_jmpbuf_ptr_type]
+#define get_jmpbuf_decl gnat_std_decls[(int) ADT_get_jmpbuf_decl]
+#define set_jmpbuf_decl gnat_std_decls[(int) ADT_set_jmpbuf_decl]
+#define get_excptr_decl gnat_std_decls[(int) ADT_get_excptr_decl]
+#define setjmp_decl gnat_std_decls[(int) ADT_setjmp_decl]
+#define longjmp_decl gnat_std_decls[(int) ADT_longjmp_decl]
+#define update_setjmp_buf_decl gnat_std_decls[(int) ADT_update_setjmp_buf_decl]
+#define raise_nodefer_decl gnat_std_decls[(int) ADT_raise_nodefer_decl]
+#define begin_handler_decl gnat_std_decls[(int) ADT_begin_handler_decl]
+#define others_decl gnat_std_decls[(int) ADT_others_decl]
+#define all_others_decl gnat_std_decls[(int) ADT_all_others_decl]
+#define end_handler_decl gnat_std_decls[(int) ADT_end_handler_decl]
+
+/* Routines expected by the gcc back-end. They must have exactly the same
+   prototype and names as below.  */
+
+/* Returns nonzero if we are currently in the global binding level.  */
+extern int global_bindings_p (void);
+
+/* Enter and exit a new binding level. */
+extern void gnat_pushlevel (void);
+extern void gnat_poplevel (void);
+
+/* Set SUPERCONTEXT of the BLOCK for the current binding level to FNDECL
+   and point FNDECL to this BLOCK.  */
+extern void set_current_block_context (tree fndecl);
+
+/* Set the jmpbuf_decl for the current binding level to DECL.  */
+extern void set_block_jmpbuf_decl (tree decl);
+
+/* Get the setjmp_decl, if any, for the current binding level.  */
+extern tree get_block_jmpbuf_decl (void);
+
+/* Records a ..._DECL node DECL as belonging to the current lexical scope
+   and uses GNAT_NODE for location information.  */
+extern void gnat_pushdecl (tree decl, Node_Id gnat_node);
+
+extern void gnat_init_decl_processing (void);
+extern void init_gigi_decls (tree long_long_float_type, tree exception_type);
+extern void gnat_init_gcc_eh (void);
+
+/* Return an integer type with the number of bits of precision given by
+   PRECISION.  UNSIGNEDP is nonzero if the type is unsigned; otherwise
+   it is a signed type.  */
+extern tree gnat_type_for_size (unsigned precision, int unsignedp);
+
+/* Return a data type that has machine mode MODE.  UNSIGNEDP selects
+   an unsigned type; otherwise a signed type is returned.  */
+extern tree gnat_type_for_mode (enum machine_mode mode, int unsignedp);
+
+/* Emit debug info for all global variable declarations.  */
+extern void gnat_write_global_declarations (void);
+
+/* Return the unsigned version of a TYPE_NODE, a scalar type.  */
+extern tree gnat_unsigned_type (tree type_node);
+
+/* Return the signed version of a TYPE_NODE, a scalar type.  */
+extern tree gnat_signed_type (tree type_node);
+
+/* Return 1 if the types T1 and T2 are compatible, i.e. if they can be
+   transparently converted to each other.  */
+extern int gnat_types_compatible_p (tree t1, tree t2);
+
+/* Create an expression whose value is that of EXPR,
+   converted to type TYPE.  The TREE_TYPE of the value
+   is always TYPE.  This function implements all reasonable
+   conversions; callers should filter out those that are
+   not permitted by the language being compiled.  */
+extern tree convert (tree type, tree expr);
+
+/* Routines created solely for the tree translator's sake. Their prototypes
+   can be changed as desired.  */
+
+/* GNAT_ENTITY is a GNAT tree node for a defining identifier.
+   GNU_DECL is the GCC tree which is to be associated with
+   GNAT_ENTITY. Such gnu tree node is always an ..._DECL node.
+   If NO_CHECK is nonzero, the latter check is suppressed.
+   If GNU_DECL is zero, a previous association is to be reset.  */
+extern void save_gnu_tree (Entity_Id gnat_entity, tree gnu_decl,
+                           bool no_check);
+
+/* GNAT_ENTITY is a GNAT tree node for a defining identifier.
+   Return the ..._DECL node that was associated with it.  If there is no tree
+   node associated with GNAT_ENTITY, abort.  */
+extern tree get_gnu_tree (Entity_Id gnat_entity);
+
+/* Return nonzero if a GCC tree has been associated with GNAT_ENTITY.  */
+extern bool present_gnu_tree (Entity_Id gnat_entity);
+
+/* Initialize tables for above routines.  */
+extern void init_gnat_to_gnu (void);
+
+/* Given a record type RECORD_TYPE and a chain of FIELD_DECL nodes FIELDLIST,
+   finish constructing the record or union type.  If REP_LEVEL is zero, this
+   record has no representation clause and so will be entirely laid out here.
+   If REP_LEVEL is one, this record has a representation clause and has been
+   laid out already; only set the sizes and alignment.  If REP_LEVEL is two,
+   this record is derived from a parent record and thus inherits its layout;
+   only make a pass on the fields to finalize them.  If DO_NOT_FINALIZE is
+   true, the record type is expected to be modified afterwards so it will
+   not be sent to the back-end for finalization.  */
+extern void finish_record_type (tree record_type, tree fieldlist,
+                                int rep_level, bool do_not_finalize);
+
+/* Wrap up compilation of RECORD_TYPE, i.e. most notably output all
+   the debug information associated with it.  It need not be invoked
+   directly in most cases since finish_record_type takes care of doing
+   so, unless explicitly requested not to through DO_NOT_FINALIZE.  */
+extern void rest_of_record_type_compilation (tree record_type);
+
+/* Append PARALLEL_TYPE on the chain of parallel types for decl.  */
+extern void add_parallel_type (tree decl, tree parallel_type);
+
+/* Return the parallel type associated to a type, if any.  */
+extern tree get_parallel_type (tree type);
+
+/* Returns a FUNCTION_TYPE node. RETURN_TYPE is the type returned by the
+   subprogram. If it is void_type_node, then we are dealing with a procedure,
+   otherwise we are dealing with a function. PARAM_DECL_LIST is a list of
+   PARM_DECL nodes that are the subprogram arguments.  CICO_LIST is the
+   copy-in/copy-out list to be stored into TYPE_CI_CO_LIST.
+   RETURNS_UNCONSTRAINED is true if the function returns an unconstrained
+   object.  RETURNS_BY_REF is true if the function returns by reference.
+   RETURNS_BY_TARGET_PTR is true if the function is to be passed (as its
+   first parameter) the address of the place to copy its result.  */
+extern tree create_subprog_type (tree return_type, tree param_decl_list,
+                                 tree cico_list, bool returns_unconstrained,
+                                 bool returns_by_ref,
+                                 bool returns_by_target_ptr);
+
+/* Return a copy of TYPE, but safe to modify in any way.  */
+extern tree copy_type (tree type);
+
+/* Return an INTEGER_TYPE of SIZETYPE with range MIN to MAX and whose
+   TYPE_INDEX_TYPE is INDEX.  GNAT_NODE is used for the position of
+   the decl.  */
+extern tree create_index_type (tree min, tree max, tree index,
+			       Node_Id gnat_node);
+
+/* Return a TYPE_DECL node. TYPE_NAME gives the name of the type (a character
+   string) and TYPE is a ..._TYPE node giving its data type.
+   ARTIFICIAL_P is true if this is a declaration that was generated
+   by the compiler.  DEBUG_INFO_P is true if we need to write debugging
+   information about this type.  GNAT_NODE is used for the position of
+   the decl.  */
+extern tree create_type_decl (tree type_name, tree type,
+                              struct attrib *attr_list,
+                              bool artificial_p, bool debug_info_p,
+			      Node_Id gnat_node);
+
+/* Return a VAR_DECL or CONST_DECL node.
+
+   VAR_NAME gives the name of the variable.  ASM_NAME is its assembler name
+   (if provided).  TYPE is its data type (a GCC ..._TYPE node).  VAR_INIT is
+   the GCC tree for an optional initial expression; NULL_TREE if none.
+
+   CONST_FLAG is true if this variable is constant, in which case we might
+   return a CONST_DECL node unless CONST_DECL_ALLOWED_P is false.
+
+   PUBLIC_FLAG is true if this definition is to be made visible outside of
+   the current compilation unit. This flag should be set when processing the
+   variable definitions in a package specification.
+
+   EXTERN_FLAG is nonzero when processing an external variable declaration (as
+   opposed to a definition: no storage is to be allocated for the variable).
+
+   STATIC_FLAG is only relevant when not at top level.  In that case
+   it indicates whether to always allocate storage to the variable.
+
+   GNAT_NODE is used for the position of the decl.  */
+tree
+create_var_decl_1 (tree var_name, tree asm_name, tree type, tree var_init,
+		   bool const_flag, bool public_flag, bool extern_flag,
+		   bool static_flag, bool const_decl_allowed_p,
+		   struct attrib *attr_list, Node_Id gnat_node);
+
+/* Wrapper around create_var_decl_1 for cases where we don't care whether
+   a VAR or a CONST decl node is created.  */
+#define create_var_decl(var_name, asm_name, type, var_init,	\
+			const_flag, public_flag, extern_flag,	\
+			static_flag, attr_list, gnat_node)	\
+  create_var_decl_1 (var_name, asm_name, type, var_init,	\
+		     const_flag, public_flag, extern_flag,	\
+		     static_flag, true, attr_list, gnat_node)
+
+/* Wrapper around create_var_decl_1 for cases where a VAR_DECL node is
+   required.  The primary intent is for DECL_CONST_CORRESPONDING_VARs, which
+   must be VAR_DECLs and on which we want TREE_READONLY set to have them
+   possibly assigned to a readonly data section.  */
+#define create_true_var_decl(var_name, asm_name, type, var_init,	\
+			     const_flag, public_flag, extern_flag,	\
+			     static_flag, attr_list, gnat_node)		\
+  create_var_decl_1 (var_name, asm_name, type, var_init,		\
+		     const_flag, public_flag, extern_flag,		\
+		     static_flag, false, attr_list, gnat_node)
+
+/* Given a DECL and ATTR_LIST, apply the listed attributes.  */
+extern void process_attributes (tree decl, struct attrib *attr_list);
+
+/* Record a global renaming pointer.  */
+void record_global_renaming_pointer (tree);
+
+/* Invalidate the global renaming pointers.   */
+void invalidate_global_renaming_pointers (void);
+
+/* Returns a FIELD_DECL node. FIELD_NAME the field name, FIELD_TYPE is its
+   type, and RECORD_TYPE is the type of the parent.  PACKED is nonzero if
+   this field is in a record type with a "pragma pack".  If SIZE is nonzero
+   it is the specified size for this field.  If POS is nonzero, it is the bit
+   position.  If ADDRESSABLE is nonzero, it means we are allowed to take
+   the address of this field for aliasing purposes.  */
+extern tree create_field_decl (tree field_name, tree field_type,
+                               tree record_type, int packed, tree size,
+                               tree pos, int addressable);
+
+/* Returns a PARM_DECL node. PARAM_NAME is the name of the parameter,
+   PARAM_TYPE is its type.  READONLY is true if the parameter is
+   readonly (either an In parameter or an address of a pass-by-ref
+   parameter). */
+extern tree create_param_decl (tree param_name, tree param_type,
+                               bool readonly);
+
+/* Returns a FUNCTION_DECL node.  SUBPROG_NAME is the name of the subprogram,
+   ASM_NAME is its assembler name, SUBPROG_TYPE is its type (a FUNCTION_TYPE
+   node), PARAM_DECL_LIST is the list of the subprogram arguments (a list of
+   PARM_DECL nodes chained through the TREE_CHAIN field).
+
+   INLINE_FLAG, PUBLIC_FLAG, EXTERN_FLAG, and ATTR_LIST are used to set the
+   appropriate fields in the FUNCTION_DECL.  GNAT_NODE gives the location.  */
+extern tree create_subprog_decl (tree subprog_name, tree asm_name,
+                                 tree subprog_type, tree param_decl_list,
+                                 bool inlinee_flag, bool public_flag,
+                                 bool extern_flag,
+				 struct attrib *attr_list, Node_Id gnat_node);
+
+/* Returns a LABEL_DECL node for LABEL_NAME.  */
+extern tree create_label_decl (tree label_name);
+
+/* Set up the framework for generating code for SUBPROG_DECL, a subprogram
+   body. This routine needs to be invoked before processing the declarations
+   appearing in the subprogram.  */
+extern void begin_subprog_body (tree subprog_decl);
+
+/* Finish the definition of the current subprogram BODY and compile it all the
+   way to assembler language output.  ELAB_P tells if this is called for an
+   elaboration routine, to be entirely discarded if empty.  */
+extern void end_subprog_body (tree body, bool elab_p);
+
+/* Build a template of type TEMPLATE_TYPE from the array bounds of ARRAY_TYPE.
+   EXPR is an expression that we can use to locate any PLACEHOLDER_EXPRs.
+   Return a constructor for the template.  */
+extern tree build_template (tree template_type, tree array_type, tree expr);
+
+/* Build a VMS descriptor from a Mechanism_Type, which must specify
+   a descriptor type, and the GCC type of an object.  Each FIELD_DECL
+   in the type contains in its DECL_INITIAL the expression to use when
+   a constructor is made for the type.  GNAT_ENTITY is a gnat node used
+   to print out an error message if the mechanism cannot be applied to
+   an object of that type and also for the name.  */
+extern tree build_vms_descriptor (tree type, Mechanism_Type mech,
+                                  Entity_Id gnat_entity);
+
+/* Build a stub for the subprogram specified by the GCC tree GNU_SUBPROG
+   and the GNAT node GNAT_SUBPROG.  */
+extern void build_function_stub (tree gnu_subprog, Entity_Id gnat_subprog);
+
+/* Build a type to be used to represent an aliased object whose nominal
+   type is an unconstrained array.  This consists of a RECORD_TYPE containing
+   a field of TEMPLATE_TYPE and a field of OBJECT_TYPE, which is an
+   ARRAY_TYPE.  If ARRAY_TYPE is that of the unconstrained array, this
+   is used to represent an arbitrary unconstrained object.  Use NAME
+   as the name of the record.  */
+extern tree build_unc_object_type (tree template_type, tree object_type,
+                                   tree name);
+
+/* Same as build_unc_object_type, but taking a thin or fat pointer type
+   instead of the template type. */
+extern tree build_unc_object_type_from_ptr (tree thin_fat_ptr_type,
+					    tree object_type, tree name);
+
+/* Shift the component offsets within an unconstrained object TYPE to make it
+   suitable for use as a designated type for thin pointers.  */
+extern void shift_unc_components_for_thin_pointers (tree type);
+
+/* Update anything previously pointing to OLD_TYPE to point to NEW_TYPE.  In
+   the normal case this is just two adjustments, but we have more to do
+   if NEW is an UNCONSTRAINED_ARRAY_TYPE.  */
+extern void update_pointer_to (tree old_type, tree new_type);
+
+/* EXP is an expression for the size of an object.  If this size contains
+   discriminant references, replace them with the maximum (if MAX_P) or
+   minimum (if !MAX_P) possible value of the discriminant.  */
+extern tree max_size (tree exp, bool max_p);
+
+/* Remove all conversions that are done in EXP.  This includes converting
+   from a padded type or to a left-justified modular type.  If TRUE_ADDRESS
+   is true, always return the address of the containing object even if
+   the address is not bit-aligned.  */
+extern tree remove_conversions (tree exp, bool true_address);
+
+/* If EXP's type is an UNCONSTRAINED_ARRAY_TYPE, return an expression that
+   refers to the underlying array.  If its type has TYPE_CONTAINS_TEMPLATE_P,
+   likewise return an expression pointing to the underlying array.  */
+extern tree maybe_unconstrained_array (tree exp);
+
+/* Return an expression that does an unchecked conversion of EXPR to TYPE.
+   If NOTRUNC_P is true, truncation operations should be suppressed.  */
+extern tree unchecked_convert (tree type, tree expr, bool notrunc_p);
+
+/* Return the appropriate GCC tree code for the specified GNAT type,
+   the latter being a record type as predicated by Is_Record_Type.  */
+extern enum tree_code tree_code_for_record_type (Entity_Id);
+
+/* Return true if GNU_TYPE is suitable as the type of a non-aliased
+   component of an aggregate type.  */
+extern bool type_for_nonaliased_component_p (tree);
+
+/* Prepare expr to be an argument of a TRUTH_NOT_EXPR or other logical
+   operation.
+
+   This preparation consists of taking the ordinary
+   representation of an expression EXPR and producing a valid tree
+   boolean expression describing whether EXPR is nonzero.  We could
+   simply always do build_binary_op (NE_EXPR, expr, integer_zero_node, 1),
+   but we optimize comparisons, &&, ||, and !.
+
+   The resulting type should always be the same as the input type.
+   This function is simpler than the corresponding C version since
+   the only possible operands will be things of Boolean type.  */
+extern tree gnat_truthvalue_conversion (tree expr);
+
+/* Return the base type of TYPE.  */
+extern tree get_base_type (tree type);
+
+/* EXP is a GCC tree representing an address.  See if we can find how
+   strictly the object at that address is aligned.   Return that alignment
+   strictly the object at that address is aligned.   Return that alignment
+   in bits.  If we don't know anything about the alignment, return 0.  */
+extern unsigned int known_alignment (tree exp);
+
+/* Return true if VALUE is a multiple of FACTOR. FACTOR must be a power
+   of 2. */
+extern bool value_factor_p (tree value, HOST_WIDE_INT factor);
+
+/* Make a binary operation of kind OP_CODE.  RESULT_TYPE is the type
+   desired for the result.  Usually the operation is to be performed
+   in that type.  For MODIFY_EXPR and ARRAY_REF, RESULT_TYPE may be 0
+   in which case the type to be used will be derived from the operands.  */
+extern tree build_binary_op (enum tree_code op_code, tree retult_type,
+                             tree left_operand, tree right_operand);
+
+/* Similar, but make unary operation.   */
+extern tree build_unary_op (enum tree_code op_code, tree result_type,
+                            tree operand);
+
+/* Similar, but for COND_EXPR.  */
+extern tree build_cond_expr (tree result_type, tree condition_operand,
+                             tree true_operand, tree false_operand);
+
+/* Similar, but for RETURN_EXPR.  */
+extern tree build_return_expr (tree result_decl, tree ret_val);
+
+/* Build a CALL_EXPR to call FUNDECL with one argument, ARG.  Return
+   the CALL_EXPR.  */
+extern tree build_call_1_expr (tree fundecl, tree arg);
+
+/* Build a CALL_EXPR to call FUNDECL with two argument, ARG1 & ARG2.  Return
+   the CALL_EXPR.  */
+extern tree build_call_2_expr (tree fundecl, tree arg1, tree arg2);
+
+/* Likewise to call FUNDECL with no arguments.  */
+extern tree build_call_0_expr (tree fundecl);
+
+/* Call a function that raises an exception and pass the line number and file
+   name, if requested.  MSG says which exception function to call.
+
+   GNAT_NODE is the gnat node conveying the source location for which the
+   error should be signaled, or Empty in which case the error is signaled on
+   the current ref_file_name/input_line.
+
+   KIND says which kind of exception this is for
+    (N_Raise_{Constraint,Storage,Program}_Error).  */
+extern tree build_call_raise (int msg, Node_Id gnat_node, char kind);
+
+/* Return a CONSTRUCTOR of TYPE whose list is LIST.  This is not the
+   same as build_constructor in the language-independent tree.c.  */
+extern tree gnat_build_constructor (tree type, tree list);
+
+/* Return a COMPONENT_REF to access a field that is given by COMPONENT,
+   an IDENTIFIER_NODE giving the name of the field, FIELD, a FIELD_DECL,
+   for the field, or both.  Don't fold the result if NO_FOLD_P.  */
+extern tree build_component_ref (tree record_variable, tree component,
+                                 tree field, bool no_fold_p);
+
+/* Build a GCC tree to call an allocation or deallocation function.
+   If GNU_OBJ is nonzero, it is an object to deallocate.  Otherwise,
+   generate an allocator.
+
+   GNU_SIZE is the size of the object and ALIGN is the alignment.
+   GNAT_PROC, if present is a procedure to call and GNAT_POOL is the
+   storage pool to use.  If not preset, malloc and free will be used.  */
+extern tree build_call_alloc_dealloc (tree gnu_obj, tree gnu_size,
+                                      unsigned align, Entity_Id gnat_proc,
+				      Entity_Id gnat_pool, Node_Id gnat_node);
+
+/* Build a GCC tree to correspond to allocating an object of TYPE whose
+   initial value if INIT, if INIT is nonzero.  Convert the expression to
+   RESULT_TYPE, which must be some type of pointer.  Return the tree.
+   GNAT_PROC and GNAT_POOL optionally give the procedure to call and
+   the storage pool to use.  GNAT_NODE is used to provide an error
+   location for restriction violations messages.  If IGNORE_INIT_TYPE is
+   true, ignore the type of INIT for the purpose of determining the size;
+   this will cause the maximum size to be allocated if TYPE is of
+   self-referential size.  */
+extern tree build_allocator (tree type, tree init, tree result_type,
+                             Entity_Id gnat_proc, Entity_Id gnat_pool,
+                             Node_Id gnat_node, bool);
+
+/* Fill in a VMS descriptor for EXPR and return a constructor for it.
+   GNAT_FORMAL is how we find the descriptor record.  */
+
+extern tree fill_vms_descriptor (tree expr, Entity_Id gnat_formal);
+
+/* Indicate that we need to make the address of EXPR_NODE and it therefore
+   should not be allocated in a register.  Return true if successful.  */
+extern bool gnat_mark_addressable (tree expr_node);
+
+/* Implementation of the builtin_function langhook.  */
+extern tree gnat_builtin_function (tree decl);
+
+/* Search the chain of currently reachable declarations for a builtin
+   FUNCTION_DECL node corresponding to function NAME (an IDENTIFIER_NODE).
+   Return the first node found, if any, or NULL_TREE otherwise.  */
+extern tree builtin_decl_for (tree name);
+
+/* This function is called by the front end to enumerate all the supported
+   modes for the machine.  We pass a function which is called back with
+   the following integer parameters:
+
+   FLOAT_P	nonzero if this represents a floating-point mode
+   COMPLEX_P	nonzero is this represents a complex mode
+   COUNT	count of number of items, nonzero for vector mode
+   PRECISION	number of bits in data representation
+   MANTISSA	number of bits in mantissa, if FP and known, else zero.
+   SIZE		number of bits used to store data
+   ALIGN	number of bits to which mode is aligned.  */
+extern void enumerate_modes (void (*f) (int, int, int, int, int, int,
+					unsigned int));
+
+/* These are temporary function to deal with recent GCC changes related to
+   FP type sizes and precisions.  */
+extern int fp_prec_to_size (int prec);
+extern int fp_size_to_prec (int size);
+
+/* These functions return the basic data type sizes and related parameters
+   about the target machine.  */
+
+extern Pos get_target_bits_per_unit (void);
+extern Pos get_target_bits_per_word (void);
+extern Pos get_target_char_size (void);
+extern Pos get_target_wchar_t_size (void);
+extern Pos get_target_short_size (void);
+extern Pos get_target_int_size (void);
+extern Pos get_target_long_size (void);
+extern Pos get_target_long_long_size (void);
+extern Pos get_target_float_size (void);
+extern Pos get_target_double_size (void);
+extern Pos get_target_long_double_size (void);
+extern Pos get_target_pointer_size (void);
+extern Pos get_target_maximum_alignment (void);
+extern Pos get_target_default_allocator_alignment (void);
+extern Pos get_target_maximum_default_alignment (void);
+extern Pos get_target_maximum_allowed_alignment (void);
+extern Nat get_float_words_be (void);
+extern Nat get_words_be (void);
+extern Nat get_bytes_be (void);
+extern Nat get_bits_be (void);
+extern Nat get_strict_alignment (void);
diff --git a/gcc/ada/gcc-interface/lang-specs.h b/gcc/ada/gcc-interface/lang-specs.h
new file mode 100644
index 00000000000..65326d4c5b2
--- /dev/null
+++ b/gcc/ada/gcc-interface/lang-specs.h
@@ -0,0 +1,48 @@
+/****************************************************************************
+ *                                                                          *
+ *                         GNAT COMPILER COMPONENTS                         *
+ *                                                                          *
+ *                            L A N G - S P E C S                           *
+ *                                                                          *
+ *                              C Header File                               *
+ *                                                                          *
+ *           Copyright (C) 1992-2008, Free Software Foundation, Inc.        *
+ *                                                                          *
+ * GNAT is free software;  you can  redistribute it  and/or modify it under *
+ * terms of the  GNU General Public License as published  by the Free Soft- *
+ * ware  Foundation;  either version 3,  or (at your option) any later ver- *
+ * sion.  GNAT is distributed in the hope that it will be useful, but WITH- *
+ * OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY *
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License *
+ * for  more details.  You should have received a copy of the GNU General   *
+ * Public License along with GCC; see the file COPYING3.  If not see        *
+ * <http://www.gnu.org/licenses/>.                                          *
+ *                                                                          *
+ * GNAT was originally developed  by the GNAT team at  New York University. *
+ * Extensive contributions were provided by Ada Core Technologies Inc.      *
+ *                                                                          *
+ ****************************************************************************/
+
+/* This is the contribution to the `default_compilers' array in gcc.c for
+   GNAT.  */
+
+  {".ads", "@ada", 0, 0, 0},
+  {".adb", "@ada", 0, 0, 0},
+  {"@ada",
+   "\
+ %{pg:%{fomit-frame-pointer:%e-pg and -fomit-frame-pointer are incompatible}}\
+ %{!S:%{!c:%e-c or -S required for Ada}}\
+ gnat1 %{I*} %{k8:-gnatk8} %{Wall:-gnatwa} %{w:-gnatws} %{!Q:-quiet}\
+    %{nostdinc*} %{nostdlib*}\
+    -dumpbase %{.adb:%b.adb}%{.ads:%b.ads}%{!.adb:%{!.ads:%b.ada}}\
+    %{O*} %{W*} %{w} %{p} %{pg:-p} %{a} %{f*} %{d*} %{g*&m*} "
+#if defined(TARGET_VXWORKS_RTP)
+   "%{fRTS=rtp:-mrtp} "
+#endif
+#if CONFIG_DUAL_EXCEPTIONS
+   "%{fRTS=sjlj:-fsjlj} "
+#endif
+   "%1 %{!S:%{o*:%w%*-gnatO}} \
+    %i %{S:%W{o*}%{!o*:-o %b.s}} \
+    %{gnatc*|gnats*: -o %j} %{-param*} \
+    %{!gnatc*:%{!gnats*:%(invoke_as)}}", 0, 0, 0},
diff --git a/gcc/ada/gcc-interface/lang.opt b/gcc/ada/gcc-interface/lang.opt
new file mode 100644
index 00000000000..d10fc3ac087
--- /dev/null
+++ b/gcc/ada/gcc-interface/lang.opt
@@ -0,0 +1,102 @@
+; Options for the Ada front end.
+; Copyright (C) 2003, 2007 Free Software Foundation, Inc.
+;
+; This file is part of GCC.
+;
+; GCC is free software; you can redistribute it and/or modify it under
+; the terms of the GNU General Public License as published by the Free
+; Software Foundation; either version 3, or (at your option) any later
+; version.
+; 
+; GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+; WARRANTY; without even the implied warranty of MERCHANTABILITY or
+; FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+; for more details.
+; 
+; You should have received a copy of the GNU General Public License
+; along with GCC; see the file COPYING3.  If not see
+; <http://www.gnu.org/licenses/>.
+
+
+; See the GCC internals manual for a description of this file's format.
+
+; Please try to keep this file in ASCII collating order.
+
+Language
+Ada
+
+I
+Ada Joined Separate
+; Documented for C
+
+Wall
+Ada
+; Documented for C
+
+Wmissing-prototypes
+Ada
+; Documented for C
+
+Wstrict-prototypes
+Ada
+; Documented for C
+
+Wwrite-strings
+Ada
+; Documented for C
+
+Wlong-long
+Ada
+; Documented for C
+
+Wvariadic-macros
+Ada
+; Documented for C
+
+Wold-style-definition
+Ada
+; Documented for C
+
+Wmissing-format-attribute
+Ada
+; Documented for C
+
+Woverlength-strings
+Ada
+; Documented for C
+
+nostdinc
+Ada RejectNegative
+; Don't look for source files
+
+nostdlib
+Ada
+; Don't look for object files
+
+feliminate-unused-debug-types
+Ada
+; Effect documented for C - intercepted for Ada to force the associated flag
+; not to be set by default, as it currently eliminates unreferenced parallel
+; types we need for encoding descriptions to the debugger.
+
+fRTS=
+Ada Joined RejectNegative
+; Selects the runtime
+
+gdwarf+
+Ada
+; Explicit request for dwarf debug info with GNAT specific extensions.
+
+gant
+Ada Joined Undocumented
+; Catches typos
+
+gnatO
+Ada Separate
+; Sets name of output ALI file (internal switch)
+
+gnat
+Ada Joined
+-gnat<options>	Specify options to GNAT
+
+; This comment is to ensure we retain the blank line above.
diff --git a/gcc/ada/gcc-interface/misc.c b/gcc/ada/gcc-interface/misc.c
new file mode 100644
index 00000000000..02397d7f445
--- /dev/null
+++ b/gcc/ada/gcc-interface/misc.c
@@ -0,0 +1,876 @@
+/****************************************************************************
+ *                                                                          *
+ *                         GNAT COMPILER COMPONENTS                         *
+ *                                                                          *
+ *                                 M I S C                                  *
+ *                                                                          *
+ *                           C Implementation File                          *
+ *                                                                          *
+ *          Copyright (C) 1992-2008, Free Software Foundation, Inc.         *
+ *                                                                          *
+ * GNAT is free software;  you can  redistribute it  and/or modify it under *
+ * terms of the  GNU General Public License as published  by the Free Soft- *
+ * ware  Foundation;  either version 2,  or (at your option) any later ver- *
+ * sion.  GNAT is distributed in the hope that it will be useful, but WITH- *
+ * OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY *
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License *
+ * for  more details.  You should have  received  a copy of the GNU General *
+ * Public License  distributed with GNAT;  see file COPYING.  If not, write *
+ * to  the  Free Software Foundation,  51  Franklin  Street,  Fifth  Floor, *
+ * Boston, MA 02110-1301, USA.                                              *
+ *                                                                          *
+ * As a  special  exception,  if you  link  this file  with other  files to *
+ * produce an executable,  this file does not by itself cause the resulting *
+ * executable to be covered by the GNU General Public License. This except- *
+ * ion does not  however invalidate  any other reasons  why the  executable *
+ * file might be covered by the  GNU Public License.                        *
+ *                                                                          *
+ * GNAT was originally developed  by the GNAT team at  New York University. *
+ * Extensive contributions were provided by Ada Core Technologies Inc.      *
+ *                                                                          *
+ ****************************************************************************/
+
+/* This file contains parts of the compiler that are required for interfacing
+   with GCC but otherwise do nothing and parts of Gigi that need to know
+   about RTL.  */
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
+#include "tree.h"
+#include "real.h"
+#include "rtl.h"
+#include "diagnostic.h"
+#include "expr.h"
+#include "libfuncs.h"
+#include "ggc.h"
+#include "flags.h"
+#include "debug.h"
+#include "cgraph.h"
+#include "tree-inline.h"
+#include "insn-codes.h"
+#include "insn-flags.h"
+#include "insn-config.h"
+#include "optabs.h"
+#include "recog.h"
+#include "toplev.h"
+#include "output.h"
+#include "except.h"
+#include "tm_p.h"
+#include "langhooks.h"
+#include "langhooks-def.h"
+#include "target.h"
+
+#include "ada.h"
+#include "types.h"
+#include "atree.h"
+#include "elists.h"
+#include "namet.h"
+#include "nlists.h"
+#include "stringt.h"
+#include "uintp.h"
+#include "fe.h"
+#include "sinfo.h"
+#include "einfo.h"
+#include "ada-tree.h"
+#include "gigi.h"
+#include "adadecode.h"
+#include "opts.h"
+#include "options.h"
+
+extern FILE *asm_out_file;
+
+/* The largest alignment, in bits, that is needed for using the widest
+   move instruction.  */
+unsigned int largest_move_alignment;
+
+static bool gnat_init			(void);
+static void gnat_finish_incomplete_decl	(tree);
+static unsigned int gnat_init_options	(unsigned int, const char **);
+static int gnat_handle_option		(size_t, const char *, int);
+static bool gnat_post_options		(const char **);
+static alias_set_type gnat_get_alias_set (tree);
+static void gnat_print_decl		(FILE *, tree, int);
+static void gnat_print_type		(FILE *, tree, int);
+static const char *gnat_printable_name	(tree, int);
+static const char *gnat_dwarf_name	(tree, int);
+static tree gnat_return_tree		(tree);
+static int gnat_eh_type_covers		(tree, tree);
+static void gnat_parse_file		(int);
+static rtx gnat_expand_expr		(tree, rtx, enum machine_mode, int,
+					 rtx *);
+static void internal_error_function	(const char *, va_list *);
+static tree gnat_type_max_size		(const_tree);
+
+/* Definitions for our language-specific hooks.  */
+
+#undef  LANG_HOOKS_NAME
+#define LANG_HOOKS_NAME			"GNU Ada"
+#undef  LANG_HOOKS_IDENTIFIER_SIZE
+#define LANG_HOOKS_IDENTIFIER_SIZE	sizeof (struct tree_identifier)
+#undef  LANG_HOOKS_INIT
+#define LANG_HOOKS_INIT			gnat_init
+#undef  LANG_HOOKS_INIT_OPTIONS
+#define LANG_HOOKS_INIT_OPTIONS		gnat_init_options
+#undef  LANG_HOOKS_HANDLE_OPTION
+#define LANG_HOOKS_HANDLE_OPTION	gnat_handle_option
+#undef  LANG_HOOKS_POST_OPTIONS
+#define LANG_HOOKS_POST_OPTIONS		gnat_post_options
+#undef  LANG_HOOKS_PARSE_FILE
+#define LANG_HOOKS_PARSE_FILE		gnat_parse_file
+#undef  LANG_HOOKS_HASH_TYPES
+#define LANG_HOOKS_HASH_TYPES		false
+#undef  LANG_HOOKS_GETDECLS
+#define LANG_HOOKS_GETDECLS		lhd_return_null_tree_v
+#undef  LANG_HOOKS_PUSHDECL
+#define LANG_HOOKS_PUSHDECL		gnat_return_tree
+#undef  LANG_HOOKS_WRITE_GLOBALS
+#define LANG_HOOKS_WRITE_GLOBALS	gnat_write_global_declarations
+#undef  LANG_HOOKS_FINISH_INCOMPLETE_DECL
+#define LANG_HOOKS_FINISH_INCOMPLETE_DECL gnat_finish_incomplete_decl
+#undef  LANG_HOOKS_GET_ALIAS_SET
+#define LANG_HOOKS_GET_ALIAS_SET	gnat_get_alias_set
+#undef  LANG_HOOKS_EXPAND_EXPR
+#define LANG_HOOKS_EXPAND_EXPR		gnat_expand_expr
+#undef  LANG_HOOKS_MARK_ADDRESSABLE
+#define LANG_HOOKS_MARK_ADDRESSABLE	gnat_mark_addressable
+#undef  LANG_HOOKS_PRINT_DECL
+#define LANG_HOOKS_PRINT_DECL		gnat_print_decl
+#undef  LANG_HOOKS_PRINT_TYPE
+#define LANG_HOOKS_PRINT_TYPE		gnat_print_type
+#undef  LANG_HOOKS_TYPE_MAX_SIZE
+#define LANG_HOOKS_TYPE_MAX_SIZE	gnat_type_max_size
+#undef  LANG_HOOKS_DECL_PRINTABLE_NAME
+#define LANG_HOOKS_DECL_PRINTABLE_NAME	gnat_printable_name
+#undef  LANG_HOOKS_DWARF_NAME
+#define LANG_HOOKS_DWARF_NAME		gnat_dwarf_name
+#undef  LANG_HOOKS_GIMPLIFY_EXPR
+#define LANG_HOOKS_GIMPLIFY_EXPR	gnat_gimplify_expr
+#undef  LANG_HOOKS_TYPE_FOR_MODE
+#define LANG_HOOKS_TYPE_FOR_MODE	gnat_type_for_mode
+#undef  LANG_HOOKS_TYPE_FOR_SIZE
+#define LANG_HOOKS_TYPE_FOR_SIZE	gnat_type_for_size
+#undef  LANG_HOOKS_TYPES_COMPATIBLE_P
+#define LANG_HOOKS_TYPES_COMPATIBLE_P	gnat_types_compatible_p
+#undef  LANG_HOOKS_ATTRIBUTE_TABLE
+#define LANG_HOOKS_ATTRIBUTE_TABLE	gnat_internal_attribute_table
+#undef  LANG_HOOKS_BUILTIN_FUNCTION
+#define LANG_HOOKS_BUILTIN_FUNCTION        gnat_builtin_function
+
+const struct lang_hooks lang_hooks = LANG_HOOKS_INITIALIZER;
+
+/* How much we want of our DWARF extensions.  Some of our dwarf+ extensions
+   are incompatible with regular GDB versions, so we must make sure to only
+   produce them on explicit request.  This is eventually reflected into the
+   use_gnu_debug_info_extensions common flag for later processing.  */
+
+static int gnat_dwarf_extensions = 0;
+
+/* Command-line argc and argv.
+   These variables are global, since they are imported and used in
+   back_end.adb  */
+
+unsigned int save_argc;
+const char **save_argv;
+
+/* gnat standard argc argv */
+
+extern int gnat_argc;
+extern char **gnat_argv;
+
+
+/* Declare functions we use as part of startup.  */
+extern void __gnat_initialize           (void *);
+extern void __gnat_install_SEH_handler  (void *);
+extern void adainit		        (void);
+extern void _ada_gnat1drv	        (void);
+
+/* The parser for the language.  For us, we process the GNAT tree.  */
+
+static void
+gnat_parse_file (int set_yydebug ATTRIBUTE_UNUSED)
+{
+  int seh[2];
+
+  /* Call the target specific initializations.  */
+  __gnat_initialize (NULL);
+
+  /* ??? Call the SEH initialization routine.  This is to workaround
+  a bootstrap path problem.  The call below should be removed at some
+  point and the SEH pointer passed to __gnat_initialize() above.  */
+  __gnat_install_SEH_handler((void *)seh);
+
+  /* Call the front-end elaboration procedures.  */
+  adainit ();
+
+  /* Call the front end.  */
+  _ada_gnat1drv ();
+
+  /* We always have a single compilation unit in Ada.  */
+  cgraph_finalize_compilation_unit ();
+}
+
+/* Decode all the language specific options that cannot be decoded by GCC.
+   The option decoding phase of GCC calls this routine on the flags that
+   it cannot decode.  This routine returns the number of consecutive arguments
+   from ARGV that it successfully decoded; 0 indicates failure.  */
+
+static int
+gnat_handle_option (size_t scode, const char *arg, int value)
+{
+  const struct cl_option *option = &cl_options[scode];
+  enum opt_code code = (enum opt_code) scode;
+  char *q;
+
+  if (arg == NULL && (option->flags & (CL_JOINED | CL_SEPARATE)))
+    {
+      error ("missing argument to \"-%s\"", option->opt_text);
+      return 1;
+    }
+
+  switch (code)
+    {
+    case OPT_I:
+      q = XNEWVEC (char, sizeof("-I") + strlen (arg));
+      strcpy (q, "-I");
+      strcat (q, arg);
+      gnat_argv[gnat_argc] = q;
+      gnat_argc++;
+      break;
+
+    case OPT_Wall:
+      set_Wunused (value);
+
+      /* We save the value of warn_uninitialized, since if they put
+	 -Wuninitialized on the command line, we need to generate a
+	 warning about not using it without also specifying -O.  */
+      if (warn_uninitialized != 1)
+	warn_uninitialized = (value ? 2 : 0);
+      break;
+
+      /* These are used in the GCC Makefile.  */
+    case OPT_Wmissing_prototypes:
+    case OPT_Wstrict_prototypes:
+    case OPT_Wwrite_strings:
+    case OPT_Wlong_long:
+    case OPT_Wvariadic_macros:
+    case OPT_Wold_style_definition:
+    case OPT_Wmissing_format_attribute:
+    case OPT_Woverlength_strings:
+      break;
+
+      /* This is handled by the front-end.  */
+    case OPT_nostdinc:
+      break;
+
+    case OPT_nostdlib:
+      gnat_argv[gnat_argc] = xstrdup ("-nostdlib");
+      gnat_argc++;
+      break;
+
+    case OPT_feliminate_unused_debug_types:
+      /* We arrange for post_option to be able to only set the corresponding
+	 flag to 1 when explicitly requested by the user.  We expect the
+	 default flag value to be either 0 or positive, and expose a positive
+	 -f as a negative value to post_option.  */
+      flag_eliminate_unused_debug_types = -value;
+      break;
+
+    case OPT_fRTS_:
+      gnat_argv[gnat_argc] = xstrdup ("-fRTS");
+      gnat_argc++;
+      break;
+
+    case OPT_gant:
+      warning (0, "%<-gnat%> misspelled as %<-gant%>");
+
+      /* ... fall through ... */
+
+    case OPT_gnat:
+      /* Recopy the switches without the 'gnat' prefix.  */
+      gnat_argv[gnat_argc] = XNEWVEC (char, strlen (arg) + 2);
+      gnat_argv[gnat_argc][0] = '-';
+      strcpy (gnat_argv[gnat_argc] + 1, arg);
+      gnat_argc++;
+      break;
+
+    case OPT_gnatO:
+      gnat_argv[gnat_argc] = xstrdup ("-O");
+      gnat_argc++;
+      gnat_argv[gnat_argc] = xstrdup (arg);
+      gnat_argc++;
+      break;
+
+    case OPT_gdwarf_:
+      gnat_dwarf_extensions ++;
+      break;
+
+    default:
+      gcc_unreachable ();
+    }
+
+  return 1;
+}
+
+/* Initialize for option processing.  */
+
+static unsigned int
+gnat_init_options (unsigned int argc, const char **argv)
+{
+  /* Initialize gnat_argv with save_argv size.  */
+  gnat_argv = (char **) xmalloc ((argc + 1) * sizeof (argv[0]));
+  gnat_argv[0] = xstrdup (argv[0]);     /* name of the command */
+  gnat_argc = 1;
+
+  save_argc = argc;
+  save_argv = argv;
+
+  /* Uninitialized really means uninitialized in Ada.  */
+  flag_zero_initialized_in_bss = 0;
+
+  return CL_Ada;
+}
+
+/* Post-switch processing.  */
+
+bool
+gnat_post_options (const char **pfilename ATTRIBUTE_UNUSED)
+{
+  /* ??? The warning machinery is outsmarted by Ada.  */
+  warn_unused_parameter = 0;
+
+  /* Force eliminate_unused_debug_types to 0 unless an explicit positive
+     -f has been passed.  This forces the default to 0 for Ada, which might
+     differ from the common default.  */
+  if (flag_eliminate_unused_debug_types < 0)
+    flag_eliminate_unused_debug_types = 1;
+  else
+    flag_eliminate_unused_debug_types = 0;
+
+  /* Reflect the explicit request of DWARF extensions into the common
+     flag for use by later passes.  */
+  if (write_symbols == DWARF2_DEBUG)
+    use_gnu_debug_info_extensions = gnat_dwarf_extensions > 0;
+
+  return false;
+}
+
+/* Here is the function to handle the compiler error processing in GCC.  */
+
+static void
+internal_error_function (const char *msgid, va_list *ap)
+{
+  text_info tinfo;
+  char *buffer, *p, *loc;
+  String_Template temp, temp_loc;
+  Fat_Pointer fp, fp_loc;
+  expanded_location s;
+
+  /* Reset the pretty-printer.  */
+  pp_clear_output_area (global_dc->printer);
+
+  /* Format the message into the pretty-printer.  */
+  tinfo.format_spec = msgid;
+  tinfo.args_ptr = ap;
+  tinfo.err_no = errno;
+  pp_format_verbatim (global_dc->printer, &tinfo);
+
+  /* Extract a (writable) pointer to the formatted text.  */
+  buffer = (char*) pp_formatted_text (global_dc->printer);
+
+  /* Go up to the first newline.  */
+  for (p = buffer; *p; p++)
+    if (*p == '\n')
+      {
+	*p = '\0';
+	break;
+      }
+
+  temp.Low_Bound = 1;
+  temp.High_Bound = p - buffer;
+  fp.Bounds = &temp;
+  fp.Array = buffer;
+
+  s = expand_location (input_location);
+  if (flag_show_column && s.column != 0)
+    asprintf (&loc, "%s:%d:%d", s.file, s.line, s.column);
+  else
+    asprintf (&loc, "%s:%d", s.file, s.line);
+  temp_loc.Low_Bound = 1;
+  temp_loc.High_Bound = strlen (loc);
+  fp_loc.Bounds = &temp_loc;
+  fp_loc.Array = loc;
+
+  Current_Error_Node = error_gnat_node;
+  Compiler_Abort (fp, -1, fp_loc);
+}
+
+/* Perform all the initialization steps that are language-specific.  */
+
+static bool
+gnat_init (void)
+{
+  /* Performs whatever initialization steps needed by the language-dependent
+     lexical analyzer.  */
+  gnat_init_decl_processing ();
+
+  /* Add the input filename as the last argument.  */
+  gnat_argv[gnat_argc] = (char *) main_input_filename;
+  gnat_argc++;
+  gnat_argv[gnat_argc] = 0;
+
+  global_dc->internal_error = &internal_error_function;
+
+  /* Show that REFERENCE_TYPEs are internal and should be Pmode.  */
+  internal_reference_types ();
+
+  return true;
+}
+
+/* This function is called indirectly from toplev.c to handle incomplete
+   declarations, i.e. VAR_DECL nodes whose DECL_SIZE is zero.  To be precise,
+   compile_file in toplev.c makes an indirect call through the function pointer
+   incomplete_decl_finalize_hook which is initialized to this routine in
+   init_decl_processing.  */
+
+static void
+gnat_finish_incomplete_decl (tree dont_care ATTRIBUTE_UNUSED)
+{
+  gcc_unreachable ();
+}
+
+/* Compute the alignment of the largest mode that can be used for copying
+   objects.  */
+
+void
+gnat_compute_largest_alignment (void)
+{
+  enum machine_mode mode;
+
+  for (mode = GET_CLASS_NARROWEST_MODE (MODE_INT); mode != VOIDmode;
+       mode = GET_MODE_WIDER_MODE (mode))
+    if (optab_handler (mov_optab, mode)->insn_code != CODE_FOR_nothing)
+      largest_move_alignment = MIN (BIGGEST_ALIGNMENT,
+				    MAX (largest_move_alignment,
+					 GET_MODE_ALIGNMENT (mode)));
+}
+
+/* If we are using the GCC mechanism to process exception handling, we
+   have to register the personality routine for Ada and to initialize
+   various language dependent hooks.  */
+
+void
+gnat_init_gcc_eh (void)
+{
+#ifdef DWARF2_UNWIND_INFO
+  /* lang_dependent_init already called dwarf2out_frame_init if true.  */
+  int dwarf2out_frame_initialized = dwarf2out_do_frame ();
+#endif
+
+  /* We shouldn't do anything if the No_Exceptions_Handler pragma is set,
+     though. This could for instance lead to the emission of tables with
+     references to symbols (such as the Ada eh personality routine) within
+     libraries we won't link against.  */
+  if (No_Exception_Handlers_Set ())
+    return;
+
+  /* Tell GCC we are handling cleanup actions through exception propagation.
+     This opens possibilities that we don't take advantage of yet, but is
+     nonetheless necessary to ensure that fixup code gets assigned to the
+     right exception regions.  */
+  using_eh_for_cleanups ();
+
+  eh_personality_libfunc = init_one_libfunc (USING_SJLJ_EXCEPTIONS
+					     ? "__gnat_eh_personality_sj"
+					     : "__gnat_eh_personality");
+  lang_eh_type_covers = gnat_eh_type_covers;
+  lang_eh_runtime_type = gnat_return_tree;
+  default_init_unwind_resume_libfunc ();
+
+  /* Turn on -fexceptions and -fnon-call-exceptions. The first one triggers
+     the generation of the necessary exception runtime tables. The second one
+     is useful for two reasons: 1/ we map some asynchronous signals like SEGV
+     to exceptions, so we need to ensure that the insns which can lead to such
+     signals are correctly attached to the exception region they pertain to,
+     2/ Some calls to pure subprograms are handled as libcall blocks and then
+     marked as "cannot trap" if the flag is not set (see emit_libcall_block).
+     We should not let this be since it is possible for such calls to actually
+     raise in Ada.  */
+  flag_exceptions = 1;
+  flag_non_call_exceptions = 1;
+
+  init_eh ();
+#ifdef DWARF2_UNWIND_INFO
+  if (!dwarf2out_frame_initialized && dwarf2out_do_frame ())
+    dwarf2out_frame_init ();
+#endif
+}
+
+/* Language hooks, first one to print language-specific items in a DECL.  */
+
+static void
+gnat_print_decl (FILE *file, tree node, int indent)
+{
+  switch (TREE_CODE (node))
+    {
+    case CONST_DECL:
+      print_node (file, "const_corresponding_var",
+		  DECL_CONST_CORRESPONDING_VAR (node), indent + 4);
+      break;
+
+    case FIELD_DECL:
+      print_node (file, "original_field", DECL_ORIGINAL_FIELD (node),
+		  indent + 4);
+      break;
+
+    case VAR_DECL:
+      print_node (file, "renamed_object", DECL_RENAMED_OBJECT (node),
+		  indent + 4);
+      break;
+
+    default:
+      break;
+    }
+}
+
+static void
+gnat_print_type (FILE *file, tree node, int indent)
+{
+  switch (TREE_CODE (node))
+    {
+    case FUNCTION_TYPE:
+      print_node (file, "ci_co_list", TYPE_CI_CO_LIST (node), indent + 4);
+      break;
+
+    case ENUMERAL_TYPE:
+      print_node (file, "RM size", TYPE_RM_SIZE_NUM (node), indent + 4);
+      break;
+
+    case INTEGER_TYPE:
+      if (TYPE_MODULAR_P (node))
+	print_node (file, "modulus", TYPE_MODULUS (node), indent + 4);
+      else if (TYPE_HAS_ACTUAL_BOUNDS_P (node))
+	print_node (file, "actual bounds", TYPE_ACTUAL_BOUNDS (node),
+		    indent + 4);
+      else if (TYPE_VAX_FLOATING_POINT_P (node))
+	;
+      else
+	print_node (file, "index type", TYPE_INDEX_TYPE (node), indent + 4);
+
+      print_node (file, "RM size", TYPE_RM_SIZE_NUM (node), indent + 4);
+      break;
+
+    case ARRAY_TYPE:
+      print_node (file,"actual bounds", TYPE_ACTUAL_BOUNDS (node), indent + 4);
+      break;
+
+    case RECORD_TYPE:
+      if (TYPE_IS_FAT_POINTER_P (node) || TYPE_CONTAINS_TEMPLATE_P (node))
+	print_node (file, "unconstrained array",
+		    TYPE_UNCONSTRAINED_ARRAY (node), indent + 4);
+      else
+	print_node (file, "Ada size", TYPE_ADA_SIZE (node), indent + 4);
+      break;
+
+    case UNION_TYPE:
+    case QUAL_UNION_TYPE:
+      print_node (file, "Ada size", TYPE_ADA_SIZE (node), indent + 4);
+      break;
+
+    default:
+      break;
+    }
+}
+
+static const char *
+gnat_dwarf_name (tree t, int verbosity ATTRIBUTE_UNUSED)
+{
+  gcc_assert (DECL_P (t));
+
+  return (const char *) IDENTIFIER_POINTER (DECL_NAME (t));
+}
+
+static const char *
+gnat_printable_name (tree decl, int verbosity)
+{
+  const char *coded_name = IDENTIFIER_POINTER (DECL_NAME (decl));
+  char *ada_name = (char *) ggc_alloc (strlen (coded_name) * 2 + 60);
+
+  __gnat_decode (coded_name, ada_name, 0);
+
+  if (verbosity == 2)
+    {
+      Set_Identifier_Casing (ada_name, (char *) DECL_SOURCE_FILE (decl));
+      ada_name = Name_Buffer;
+    }
+
+  return (const char *) ada_name;
+}
+
+/* Expands GNAT-specific GCC tree nodes.  The only ones we support
+   here are  and NULL_EXPR.  */
+
+static rtx
+gnat_expand_expr (tree exp, rtx target, enum machine_mode tmode,
+		  int modifier, rtx *alt_rtl)
+{
+  tree type = TREE_TYPE (exp);
+  tree new;
+
+  /* Update EXP to be the new expression to expand.  */
+  switch (TREE_CODE (exp))
+    {
+#if 0
+    case ALLOCATE_EXPR:
+      return
+	allocate_dynamic_stack_space
+	  (expand_expr (TREE_OPERAND (exp, 0), NULL_RTX, TYPE_MODE (sizetype),
+			EXPAND_NORMAL),
+	   NULL_RTX, tree_low_cst (TREE_OPERAND (exp, 1), 1));
+#endif
+
+    case UNCONSTRAINED_ARRAY_REF:
+      /* If we are evaluating just for side-effects, just evaluate our
+	 operand.  Otherwise, abort since this code should never appear
+	 in a tree to be evaluated (objects aren't unconstrained).  */
+      if (target == const0_rtx || TREE_CODE (type) == VOID_TYPE)
+	return expand_expr (TREE_OPERAND (exp, 0), const0_rtx,
+			    VOIDmode, modifier);
+
+      /* ... fall through ... */
+
+    default:
+      gcc_unreachable ();
+    }
+
+  return expand_expr_real (new, target, tmode, modifier, alt_rtl);
+}
+
+/* Do nothing (return the tree node passed).  */
+
+static tree
+gnat_return_tree (tree t)
+{
+  return t;
+}
+
+/* Return true if type A catches type B. Callback for flow analysis from
+   the exception handling part of the back-end.  */
+
+static int
+gnat_eh_type_covers (tree a, tree b)
+{
+  /* a catches b if they represent the same exception id or if a
+     is an "others".
+
+     ??? integer_zero_node for "others" is hardwired in too many places
+     currently.  */
+  return (a == b || a == integer_zero_node);
+}
+
+/* Get the alias set corresponding to a type or expression.  */
+
+static alias_set_type
+gnat_get_alias_set (tree type)
+{
+  /* If this is a padding type, use the type of the first field.  */
+  if (TREE_CODE (type) == RECORD_TYPE
+      && TYPE_IS_PADDING_P (type))
+    return get_alias_set (TREE_TYPE (TYPE_FIELDS (type)));
+
+  /* If the type is an unconstrained array, use the type of the
+     self-referential array we make.  */
+  else if (TREE_CODE (type) == UNCONSTRAINED_ARRAY_TYPE)
+    return
+      get_alias_set (TREE_TYPE (TREE_TYPE (TYPE_FIELDS (TREE_TYPE (type)))));
+
+  /* If the type can alias any other types, return the alias set 0.  */
+  else if (TYPE_P (type)
+	   && TYPE_UNIVERSAL_ALIASING_P (TYPE_MAIN_VARIANT (type)))
+    return 0;
+
+  return -1;
+}
+
+/* GNU_TYPE is a type.  Return its maximum size in bytes, if known,
+   as a constant when possible.  */
+
+static tree
+gnat_type_max_size (const_tree gnu_type)
+{
+  /* First see what we can get from TYPE_SIZE_UNIT, which might not
+     be constant even for simple expressions if it has already been
+     elaborated and possibly replaced by a VAR_DECL.  */
+  tree max_unitsize = max_size (TYPE_SIZE_UNIT (gnu_type), true);
+
+  /* If we don't have a constant, see what we can get from TYPE_ADA_SIZE,
+     which should stay untouched.  */
+  if (!host_integerp (max_unitsize, 1)
+      && (TREE_CODE (gnu_type) == RECORD_TYPE
+	  || TREE_CODE (gnu_type) == UNION_TYPE
+	  || TREE_CODE (gnu_type) == QUAL_UNION_TYPE)
+      && TYPE_ADA_SIZE (gnu_type))
+    {
+      tree max_adasize = max_size (TYPE_ADA_SIZE (gnu_type), true);
+
+      /* If we have succeeded in finding a constant, round it up to the
+	 type's alignment and return the result in units.  */
+      if (host_integerp (max_adasize, 1))
+	max_unitsize
+	  = size_binop (CEIL_DIV_EXPR,
+			round_up (max_adasize, TYPE_ALIGN (gnu_type)),
+			bitsize_unit_node);
+    }
+
+  return max_unitsize;
+}
+
+/* GNU_TYPE is a type. Determine if it should be passed by reference by
+   default.  */
+
+bool
+default_pass_by_ref (tree gnu_type)
+{
+  /* We pass aggregates by reference if they are sufficiently large.  The
+     choice of constant here is somewhat arbitrary.  We also pass by
+     reference if the target machine would either pass or return by
+     reference.  Strictly speaking, we need only check the return if this
+     is an In Out parameter, but it's probably best to err on the side of
+     passing more things by reference.  */
+
+  if (pass_by_reference (NULL, TYPE_MODE (gnu_type), gnu_type, 1))
+    return true;
+
+  if (targetm.calls.return_in_memory (gnu_type, NULL_TREE))
+    return true;
+
+  if (AGGREGATE_TYPE_P (gnu_type)
+      && (!host_integerp (TYPE_SIZE (gnu_type), 1)
+	  || 0 < compare_tree_int (TYPE_SIZE (gnu_type),
+				   8 * TYPE_ALIGN (gnu_type))))
+    return true;
+
+  return false;
+}
+
+/* GNU_TYPE is the type of a subprogram parameter.  Determine from the type if
+   it should be passed by reference. */
+
+bool
+must_pass_by_ref (tree gnu_type)
+{
+  /* We pass only unconstrained objects, those required by the language
+     to be passed by reference, and objects of variable size.  The latter
+     is more efficient, avoids problems with variable size temporaries,
+     and does not produce compatibility problems with C, since C does
+     not have such objects.  */
+  return (TREE_CODE (gnu_type) == UNCONSTRAINED_ARRAY_TYPE
+	  || (AGGREGATE_TYPE_P (gnu_type) && TYPE_BY_REFERENCE_P (gnu_type))
+	  || (TYPE_SIZE (gnu_type)
+	      && TREE_CODE (TYPE_SIZE (gnu_type)) != INTEGER_CST));
+}
+
+/* This function is called by the front end to enumerate all the supported
+   modes for the machine.  We pass a function which is called back with
+   the following integer parameters:
+
+   FLOAT_P	nonzero if this represents a floating-point mode
+   COMPLEX_P	nonzero is this represents a complex mode
+   COUNT	count of number of items, nonzero for vector mode
+   PRECISION	number of bits in data representation
+   MANTISSA	number of bits in mantissa, if FP and known, else zero.
+   SIZE		number of bits used to store data
+   ALIGN	number of bits to which mode is aligned.  */
+
+void
+enumerate_modes (void (*f) (int, int, int, int, int, int, unsigned int))
+{
+  enum machine_mode i;
+
+  for (i = 0; i < NUM_MACHINE_MODES; i++)
+    {
+      enum machine_mode j;
+      bool float_p = 0;
+      bool complex_p = 0;
+      bool vector_p = 0;
+      bool skip_p = 0;
+      int mantissa = 0;
+      enum machine_mode inner_mode = i;
+
+      switch (GET_MODE_CLASS (i))
+	{
+	case MODE_INT:
+	  break;
+	case MODE_FLOAT:
+	  float_p = 1;
+	  break;
+	case MODE_COMPLEX_INT:
+	  complex_p = 1;
+	  inner_mode = GET_MODE_INNER (i);
+	  break;
+	case MODE_COMPLEX_FLOAT:
+	  float_p = 1;
+	  complex_p = 1;
+	  inner_mode = GET_MODE_INNER (i);
+	  break;
+	case MODE_VECTOR_INT:
+	  vector_p = 1;
+	  inner_mode = GET_MODE_INNER (i);
+	  break;
+	case MODE_VECTOR_FLOAT:
+	  float_p = 1;
+	  vector_p = 1;
+	  inner_mode = GET_MODE_INNER (i);
+	  break;
+	default:
+	  skip_p = 1;
+	}
+
+      /* Skip this mode if it's one the front end doesn't need to know about
+	 (e.g., the CC modes) or if there is no add insn for that mode (or
+	 any wider mode), meaning it is not supported by the hardware.  If
+	 this a complex or vector mode, we care about the inner mode.  */
+      for (j = inner_mode; j != VOIDmode; j = GET_MODE_WIDER_MODE (j))
+	if (optab_handler (add_optab, j)->insn_code != CODE_FOR_nothing)
+	  break;
+
+      if (float_p)
+	{
+	  const struct real_format *fmt = REAL_MODE_FORMAT (inner_mode);
+
+	  mantissa = fmt->p;
+	}
+
+      if (!skip_p && j != VOIDmode)
+	(*f) (float_p, complex_p, vector_p ? GET_MODE_NUNITS (i) : 0,
+	      GET_MODE_BITSIZE (i), mantissa,
+	      GET_MODE_SIZE (i) * BITS_PER_UNIT, GET_MODE_ALIGNMENT (i));
+    }
+}
+
+int
+fp_prec_to_size (int prec)
+{
+  enum machine_mode mode;
+
+  for (mode = GET_CLASS_NARROWEST_MODE (MODE_FLOAT); mode != VOIDmode;
+       mode = GET_MODE_WIDER_MODE (mode))
+    if (GET_MODE_PRECISION (mode) == prec)
+      return GET_MODE_BITSIZE (mode);
+
+  gcc_unreachable ();
+}
+
+int
+fp_size_to_prec (int size)
+{
+  enum machine_mode mode;
+
+  for (mode = GET_CLASS_NARROWEST_MODE (MODE_FLOAT); mode != VOIDmode;
+       mode = GET_MODE_WIDER_MODE (mode))
+    if (GET_MODE_BITSIZE (mode) == size)
+      return GET_MODE_PRECISION (mode);
+
+  gcc_unreachable ();
+}
diff --git a/gcc/ada/gcc-interface/targtyps.c b/gcc/ada/gcc-interface/targtyps.c
new file mode 100644
index 00000000000..c4e3299667d
--- /dev/null
+++ b/gcc/ada/gcc-interface/targtyps.c
@@ -0,0 +1,230 @@
+/****************************************************************************
+ *                                                                          *
+ *                         GNAT COMPILER COMPONENTS                         *
+ *                                                                          *
+ *                            T A R G T Y P S                               *
+ *                                                                          *
+ *                                  Body                                    *
+ *                                                                          *
+ *          Copyright (C) 1992-2007, Free Software Foundation, Inc.         *
+ *                                                                          *
+ * GNAT is free software;  you can  redistribute it  and/or modify it under *
+ * terms of the  GNU General Public License as published  by the Free Soft- *
+ * ware  Foundation;  either version 2,  or (at your option) any later ver- *
+ * sion.  GNAT is distributed in the hope that it will be useful, but WITH- *
+ * OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY *
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License *
+ * for  more details.  You should have  received  a copy of the GNU General *
+ * Public License  distributed with GNAT;  see file COPYING.  If not, write *
+ * to  the  Free Software Foundation,  51  Franklin  Street,  Fifth  Floor, *
+ * Boston, MA 02110-1301, USA.                                              *
+ *                                                                          *
+ * As a  special  exception,  if you  link  this file  with other  files to *
+ * produce an executable,  this file does not by itself cause the resulting *
+ * executable to be covered by the GNU General Public License. This except- *
+ * ion does not  however invalidate  any other reasons  why the  executable *
+ * file might be covered by the  GNU Public License.                        *
+ *                                                                          *
+ * GNAT was originally developed  by the GNAT team at  New York University. *
+ * Extensive contributions were provided by Ada Core Technologies Inc.      *
+ *                                                                          *
+ ****************************************************************************/
+
+/* Functions for retrieving target types. See Ada package Get_Targ */
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
+#include "tree.h"
+#include "real.h"
+#include "rtl.h"
+#include "ada.h"
+#include "types.h"
+#include "atree.h"
+#include "elists.h"
+#include "namet.h"
+#include "nlists.h"
+#include "snames.h"
+#include "stringt.h"
+#include "uintp.h"
+#include "urealp.h"
+#include "fe.h"
+#include "sinfo.h"
+#include "einfo.h"
+#include "ada-tree.h"
+#include "gigi.h"
+
+/* If we don't have a specific size for Ada's equivalent of `long', use that
+   of C.  */
+#ifndef ADA_LONG_TYPE_SIZE
+#define ADA_LONG_TYPE_SIZE LONG_TYPE_SIZE
+#endif
+
+#ifndef WIDEST_HARDWARE_FP_SIZE
+#define WIDEST_HARDWARE_FP_SIZE LONG_DOUBLE_TYPE_SIZE
+#endif
+
+/* The following provide a functional interface for the front end Ada code
+   to determine the sizes that are used for various C types. */
+
+Pos
+get_target_bits_per_unit (void)
+{
+  return BITS_PER_UNIT;
+}
+
+Pos
+get_target_bits_per_word (void)
+{
+  return BITS_PER_WORD;
+}
+
+Pos
+get_target_char_size (void)
+{
+  return CHAR_TYPE_SIZE;
+}
+
+Pos
+get_target_wchar_t_size (void)
+{
+  /* We never want wide characters less than "short" in Ada.  */
+  return MAX (SHORT_TYPE_SIZE, WCHAR_TYPE_SIZE);
+}
+
+Pos
+get_target_short_size (void)
+{
+  return SHORT_TYPE_SIZE;
+}
+
+Pos
+get_target_int_size (void)
+{
+  return INT_TYPE_SIZE;
+}
+
+Pos
+get_target_long_size (void)
+{
+  return ADA_LONG_TYPE_SIZE;
+}
+
+Pos
+get_target_long_long_size (void)
+{
+  return LONG_LONG_TYPE_SIZE;
+}
+
+Pos
+get_target_float_size (void)
+{
+  return fp_prec_to_size (FLOAT_TYPE_SIZE);
+}
+
+Pos
+get_target_double_size (void)
+{
+  return fp_prec_to_size (DOUBLE_TYPE_SIZE);
+}
+
+Pos
+get_target_long_double_size (void)
+{
+  return fp_prec_to_size (WIDEST_HARDWARE_FP_SIZE);
+}
+
+
+Pos
+get_target_pointer_size (void)
+{
+  return POINTER_SIZE;
+}
+
+/* Alignment related values, mapped to attributes for functional and
+   documentation purposes.  */
+
+/* Standard'Maximum_Default_Alignment.  Maximum alignment that the compiler
+   might choose by default for a type or object.
+
+   Stricter alignment requests trigger gigi's aligning_type circuitry for
+   stack objects or objects allocated by the default allocator.  */
+
+Pos
+get_target_maximum_default_alignment (void)
+{
+  return BIGGEST_ALIGNMENT / BITS_PER_UNIT;
+}
+
+/* Standard'Default_Allocator_Alignment.  Alignment guaranteed to be honored
+   by the default allocator (System.Memory.Alloc or malloc if we have no
+   run-time library at hand).
+
+   Stricter alignment requests trigger gigi's aligning_type circuitry for
+   objects allocated by the default allocator.  */
+
+Pos
+get_target_default_allocator_alignment (void)
+{
+  /* ??? Need a way to get info about __gnat_malloc from here (whether
+     it is handy and what alignment it honors).  */
+
+  return MALLOC_ABI_ALIGNMENT / BITS_PER_UNIT;
+}
+
+/* Standard'Maximum_Allowed_Alignment.  Maximum alignment that we may
+   accept for any type or object.  */
+
+#ifndef MAX_OFILE_ALIGNMENT
+#define MAX_OFILE_ALIGNMENT BIGGEST_ALIGNMENT
+#endif
+
+Pos
+get_target_maximum_allowed_alignment (void)
+{
+  return MAX_OFILE_ALIGNMENT / BITS_PER_UNIT;
+}
+
+/* Standard'Maximum_Alignment.  The single attribute initially made
+   available, now a synonym of Standard'Maximum_Default_Alignment.  */
+
+Pos
+get_target_maximum_alignment (void)
+{
+  return get_target_maximum_default_alignment ();
+}
+
+#ifndef FLOAT_WORDS_BIG_ENDIAN
+#define FLOAT_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
+#endif
+
+Nat
+get_float_words_be (void)
+{
+  return FLOAT_WORDS_BIG_ENDIAN;
+}
+
+Nat
+get_words_be (void)
+{
+  return WORDS_BIG_ENDIAN;
+}
+
+Nat
+get_bytes_be (void)
+{
+  return BYTES_BIG_ENDIAN;
+}
+
+Nat
+get_bits_be (void)
+{
+  return BITS_BIG_ENDIAN;
+}
+
+Nat
+get_strict_alignment (void)
+{
+  return STRICT_ALIGNMENT;
+}
diff --git a/gcc/ada/gcc-interface/trans.c b/gcc/ada/gcc-interface/trans.c
new file mode 100644
index 00000000000..abc71f5e53e
--- /dev/null
+++ b/gcc/ada/gcc-interface/trans.c
@@ -0,0 +1,7091 @@
+/****************************************************************************
+ *                                                                          *
+ *                         GNAT COMPILER COMPONENTS                         *
+ *                                                                          *
+ *                                T R A N S                                 *
+ *                                                                          *
+ *                          C Implementation File                           *
+ *                                                                          *
+ *          Copyright (C) 1992-2008, Free Software Foundation, Inc.         *
+ *                                                                          *
+ * GNAT is free software;  you can  redistribute it  and/or modify it under *
+ * terms of the  GNU General Public License as published  by the Free Soft- *
+ * ware  Foundation;  either version 2,  or (at your option) any later ver- *
+ * sion.  GNAT is distributed in the hope that it will be useful, but WITH- *
+ * OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY *
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License *
+ * for  more details.  You should have  received  a copy of the GNU General *
+ * Public License  distributed with GNAT;  see file COPYING.  If not, write *
+ * to  the  Free Software Foundation,  51  Franklin  Street,  Fifth  Floor, *
+ * Boston, MA 02110-1301, USA.                                              *
+ *                                                                          *
+ * GNAT was originally developed  by the GNAT team at  New York University. *
+ * Extensive contributions were provided by Ada Core Technologies Inc.      *
+ *                                                                          *
+ ****************************************************************************/
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
+#include "tree.h"
+#include "real.h"
+#include "flags.h"
+#include "toplev.h"
+#include "rtl.h"
+#include "expr.h"
+#include "ggc.h"
+#include "cgraph.h"
+#include "function.h"
+#include "except.h"
+#include "debug.h"
+#include "output.h"
+#include "tree-iterator.h"
+#include "gimple.h"
+#include "ada.h"
+#include "types.h"
+#include "atree.h"
+#include "elists.h"
+#include "namet.h"
+#include "nlists.h"
+#include "snames.h"
+#include "stringt.h"
+#include "uintp.h"
+#include "urealp.h"
+#include "fe.h"
+#include "sinfo.h"
+#include "einfo.h"
+#include "ada-tree.h"
+#include "gigi.h"
+#include "adadecode.h"
+
+#include "dwarf2.h"
+#include "dwarf2out.h"
+
+/* We should avoid allocating more than ALLOCA_THRESHOLD bytes via alloca,
+   for fear of running out of stack space.  If we need more, we use xmalloc
+   instead.  */
+#define ALLOCA_THRESHOLD 1000
+
+/* Let code below know whether we are targetting VMS without need of
+   intrusive preprocessor directives.  */
+#ifndef TARGET_ABI_OPEN_VMS
+#define TARGET_ABI_OPEN_VMS 0
+#endif
+
+extern char *__gnat_to_canonical_file_spec (char *);
+
+int max_gnat_nodes;
+int number_names;
+int number_files;
+struct Node *Nodes_Ptr;
+Node_Id *Next_Node_Ptr;
+Node_Id *Prev_Node_Ptr;
+struct Elist_Header *Elists_Ptr;
+struct Elmt_Item *Elmts_Ptr;
+struct String_Entry *Strings_Ptr;
+Char_Code *String_Chars_Ptr;
+struct List_Header *List_Headers_Ptr;
+
+/* Current filename without path. */
+const char *ref_filename;
+
+/* If true, then gigi is being called on an analyzed but unexpanded
+   tree, and the only purpose of the call is to properly annotate
+   types with representation information. */
+bool type_annotate_only;
+
+/* When not optimizing, we cache the 'First, 'Last and 'Length attributes
+   of unconstrained array IN parameters to avoid emitting a great deal of
+   redundant instructions to recompute them each time.  */
+struct parm_attr GTY (())
+{
+  int id; /* GTY doesn't like Entity_Id.  */
+  int dim;
+  tree first;
+  tree last;
+  tree length;
+};
+
+typedef struct parm_attr *parm_attr;
+
+DEF_VEC_P(parm_attr);
+DEF_VEC_ALLOC_P(parm_attr,gc);
+
+struct language_function GTY(())
+{
+  VEC(parm_attr,gc) *parm_attr_cache;
+};
+
+#define f_parm_attr_cache \
+  DECL_STRUCT_FUNCTION (current_function_decl)->language->parm_attr_cache
+
+/* A structure used to gather together information about a statement group.
+   We use this to gather related statements, for example the "then" part
+   of a IF.  In the case where it represents a lexical scope, we may also
+   have a BLOCK node corresponding to it and/or cleanups.  */
+
+struct stmt_group GTY((chain_next ("%h.previous"))) {
+  struct stmt_group *previous;	/* Previous code group.  */
+  tree stmt_list;		/* List of statements for this code group. */
+  tree block;			/* BLOCK for this code group, if any. */
+  tree cleanups;		/* Cleanups for this code group, if any.  */
+};
+
+static GTY(()) struct stmt_group *current_stmt_group;
+
+/* List of unused struct stmt_group nodes.  */
+static GTY((deletable)) struct stmt_group *stmt_group_free_list;
+
+/* A structure used to record information on elaboration procedures
+   we've made and need to process.
+
+   ??? gnat_node should be Node_Id, but gengtype gets confused.  */
+
+struct elab_info GTY((chain_next ("%h.next"))) {
+  struct elab_info *next;	/* Pointer to next in chain. */
+  tree elab_proc;		/* Elaboration procedure.  */
+  int gnat_node;		/* The N_Compilation_Unit.  */
+};
+
+static GTY(()) struct elab_info *elab_info_list;
+
+/* Free list of TREE_LIST nodes used for stacks.  */
+static GTY((deletable)) tree gnu_stack_free_list;
+
+/* List of TREE_LIST nodes representing a stack of exception pointer
+   variables.  TREE_VALUE is the VAR_DECL that stores the address of
+   the raised exception.  Nonzero means we are in an exception
+   handler.  Not used in the zero-cost case.  */
+static GTY(()) tree gnu_except_ptr_stack;
+
+/* List of TREE_LIST nodes used to store the current elaboration procedure
+   decl.  TREE_VALUE is the decl.  */
+static GTY(()) tree gnu_elab_proc_stack;
+
+/* Variable that stores a list of labels to be used as a goto target instead of
+   a return in some functions.  See processing for N_Subprogram_Body.  */
+static GTY(()) tree gnu_return_label_stack;
+
+/* List of TREE_LIST nodes representing a stack of LOOP_STMT nodes.
+   TREE_VALUE of each entry is the label of the corresponding LOOP_STMT.  */
+static GTY(()) tree gnu_loop_label_stack;
+
+/* List of TREE_LIST nodes representing labels for switch statements.
+   TREE_VALUE of each entry is the label at the end of the switch.  */
+static GTY(()) tree gnu_switch_label_stack;
+
+/* List of TREE_LIST nodes containing the stacks for N_{Push,Pop}_*_Label.  */
+static GTY(()) tree gnu_constraint_error_label_stack;
+static GTY(()) tree gnu_storage_error_label_stack;
+static GTY(()) tree gnu_program_error_label_stack;
+
+/* Map GNAT tree codes to GCC tree codes for simple expressions.  */
+static enum tree_code gnu_codes[Number_Node_Kinds];
+
+/* Current node being treated, in case abort called.  */
+Node_Id error_gnat_node;
+
+static void init_code_table (void);
+static void Compilation_Unit_to_gnu (Node_Id);
+static void record_code_position (Node_Id);
+static void insert_code_for (Node_Id);
+static void add_cleanup (tree, Node_Id);
+static tree unshare_save_expr (tree *, int *, void *);
+static void add_stmt_list (List_Id);
+static void push_exception_label_stack (tree *, Entity_Id);
+static tree build_stmt_group (List_Id, bool);
+static void push_stack (tree *, tree, tree);
+static void pop_stack (tree *);
+static enum gimplify_status gnat_gimplify_stmt (tree *);
+static void elaborate_all_entities (Node_Id);
+static void process_freeze_entity (Node_Id);
+static void process_inlined_subprograms (Node_Id);
+static void process_decls (List_Id, List_Id, Node_Id, bool, bool);
+static tree emit_range_check (tree, Node_Id);
+static tree emit_index_check (tree, tree, tree, tree);
+static tree emit_check (tree, tree, int);
+static tree convert_with_check (Entity_Id, tree, bool, bool, bool);
+static bool smaller_packable_type_p (tree, tree);
+static bool addressable_p (tree, tree);
+static tree assoc_to_constructor (Entity_Id, Node_Id, tree);
+static tree extract_values (tree, tree);
+static tree pos_to_constructor (Node_Id, tree, Entity_Id);
+static tree maybe_implicit_deref (tree);
+static tree gnat_stabilize_reference (tree, bool);
+static tree gnat_stabilize_reference_1 (tree, bool);
+static void set_expr_location_from_node (tree, Node_Id);
+static int lvalue_required_p (Node_Id, tree, int);
+
+/* Hooks for debug info back-ends, only supported and used in a restricted set
+   of configurations.  */
+static const char *extract_encoding (const char *) ATTRIBUTE_UNUSED;
+static const char *decode_name (const char *) ATTRIBUTE_UNUSED;
+
+/* This is the main program of the back-end.  It sets up all the table
+   structures and then generates code.  */
+
+void
+gigi (Node_Id gnat_root, int max_gnat_node, int number_name,
+      struct Node *nodes_ptr, Node_Id *next_node_ptr, Node_Id *prev_node_ptr,
+      struct Elist_Header *elists_ptr, struct Elmt_Item *elmts_ptr,
+      struct String_Entry *strings_ptr, Char_Code *string_chars_ptr,
+      struct List_Header *list_headers_ptr, Nat number_file,
+      struct File_Info_Type *file_info_ptr,
+      Entity_Id standard_integer, Entity_Id standard_long_long_float,
+      Entity_Id standard_exception_type, Int gigi_operating_mode)
+{
+  tree gnu_standard_long_long_float;
+  tree gnu_standard_exception_type;
+  struct elab_info *info;
+  int i;
+
+  max_gnat_nodes = max_gnat_node;
+  number_names = number_name;
+  number_files = number_file;
+  Nodes_Ptr = nodes_ptr;
+  Next_Node_Ptr = next_node_ptr;
+  Prev_Node_Ptr = prev_node_ptr;
+  Elists_Ptr = elists_ptr;
+  Elmts_Ptr = elmts_ptr;
+  Strings_Ptr = strings_ptr;
+  String_Chars_Ptr = string_chars_ptr;
+  List_Headers_Ptr = list_headers_ptr;
+
+  type_annotate_only = (gigi_operating_mode == 1);
+
+  for (i = 0; i < number_files; i++)
+    {
+      /* Use the identifier table to make a permanent copy of the filename as
+	 the name table gets reallocated after Gigi returns but before all the
+	 debugging information is output.  The __gnat_to_canonical_file_spec
+	 call translates filenames from pragmas Source_Reference that contain
+	 host style syntax not understood by gdb. */
+      const char *filename
+	= IDENTIFIER_POINTER
+	   (get_identifier
+	    (__gnat_to_canonical_file_spec
+	     (Get_Name_String (file_info_ptr[i].File_Name))));
+
+      /* We rely on the order isomorphism between files and line maps.  */
+      gcc_assert ((int) line_table->used == i);
+
+      /* We create the line map for a source file at once, with a fixed number
+	 of columns chosen to avoid jumping over the next power of 2.  */
+      linemap_add (line_table, LC_ENTER, 0, filename, 1);
+      linemap_line_start (line_table, file_info_ptr[i].Num_Source_Lines, 252);
+      linemap_position_for_column (line_table, 252 - 1);
+      linemap_add (line_table, LC_LEAVE, 0, NULL, 0);
+    }
+
+  /* Initialize ourselves.  */
+  init_code_table ();
+  init_gnat_to_gnu ();
+  gnat_compute_largest_alignment ();
+  init_dummy_type ();
+
+  /* If we are just annotating types, give VOID_TYPE zero sizes to avoid
+     errors.  */
+  if (type_annotate_only)
+    {
+      TYPE_SIZE (void_type_node) = bitsize_zero_node;
+      TYPE_SIZE_UNIT (void_type_node) = size_zero_node;
+    }
+
+  /* If the GNU type extensions to DWARF are available, setup the hooks.  */
+#if defined (DWARF2_DEBUGGING_INFO) && defined (DWARF2_GNU_TYPE_EXTENSIONS)
+  /* We condition the name demangling and the generation of type encoding
+     strings on -gdwarf+ and always set descriptive types on.  */
+  if (use_gnu_debug_info_extensions)
+    {
+      dwarf2out_set_type_encoding_func (extract_encoding);
+      dwarf2out_set_demangle_name_func (decode_name);
+    }
+  dwarf2out_set_descriptive_type_func (get_parallel_type);
+#endif
+
+  /* Enable GNAT stack checking method if needed */
+  if (!Stack_Check_Probes_On_Target)
+    set_stack_check_libfunc (gen_rtx_SYMBOL_REF (Pmode, "_gnat_stack_check"));
+
+  /* Give names and make TYPE_DECLs for common types.  */
+  create_type_decl (get_identifier (SIZE_TYPE), sizetype,
+		    NULL, false, true, Empty);
+  create_type_decl (get_identifier ("integer"), integer_type_node,
+		    NULL, false, true, Empty);
+  create_type_decl (get_identifier ("unsigned char"), char_type_node,
+		    NULL, false, true, Empty);
+  create_type_decl (get_identifier ("long integer"), long_integer_type_node,
+		    NULL, false, true, Empty);
+
+  /* Save the type we made for integer as the type for Standard.Integer.
+     Then make the rest of the standard types.  Note that some of these
+     may be subtypes.  */
+  save_gnu_tree (Base_Type (standard_integer), TYPE_NAME (integer_type_node),
+		 false);
+
+  gnu_except_ptr_stack = tree_cons (NULL_TREE, NULL_TREE, NULL_TREE);
+  gnu_constraint_error_label_stack
+    = tree_cons (NULL_TREE, NULL_TREE, NULL_TREE);
+  gnu_storage_error_label_stack = tree_cons (NULL_TREE, NULL_TREE, NULL_TREE);
+  gnu_program_error_label_stack = tree_cons (NULL_TREE, NULL_TREE, NULL_TREE);
+
+  gnu_standard_long_long_float
+    = gnat_to_gnu_entity (Base_Type (standard_long_long_float), NULL_TREE, 0);
+  gnu_standard_exception_type
+    = gnat_to_gnu_entity (Base_Type (standard_exception_type),  NULL_TREE, 0);
+
+  init_gigi_decls (gnu_standard_long_long_float, gnu_standard_exception_type);
+
+  /* Process any Pragma Ident for the main unit.  */
+#ifdef ASM_OUTPUT_IDENT
+  if (Present (Ident_String (Main_Unit)))
+    ASM_OUTPUT_IDENT
+      (asm_out_file,
+       TREE_STRING_POINTER (gnat_to_gnu (Ident_String (Main_Unit))));
+#endif
+
+  /* If we are using the GCC exception mechanism, let GCC know.  */
+  if (Exception_Mechanism == Back_End_Exceptions)
+    gnat_init_gcc_eh ();
+
+  gcc_assert (Nkind (gnat_root) == N_Compilation_Unit);
+  start_stmt_group ();
+  Compilation_Unit_to_gnu (gnat_root);
+
+  /* Now see if we have any elaboration procedures to deal with. */
+  for (info = elab_info_list; info; info = info->next)
+    {
+      tree gnu_body = DECL_SAVED_TREE (info->elab_proc);
+
+      /* Unshare SAVE_EXPRs between subprograms.  These are not unshared by
+	 the gimplifier for obvious reasons, but it turns out that we need to
+	 unshare them for the global level because of SAVE_EXPRs made around
+	 checks for global objects and around allocators for global objects
+	 of variable size, in order to prevent node sharing in the underlying
+	 expression.  Note that this implicitly assumes that the SAVE_EXPR
+	 nodes themselves are not shared between subprograms, which would be
+	 an upstream bug for which we would not change the outcome.  */
+      walk_tree_without_duplicates (&gnu_body, unshare_save_expr, NULL);
+
+      /* Process the function as others, but for indicating this is an
+	 elab proc, to be discarded if empty, then propagate the status
+	 up to the GNAT tree node.  */
+      begin_subprog_body (info->elab_proc);
+      end_subprog_body (gnu_body, true);
+
+      if (empty_body_p (gimple_body (info->elab_proc)))
+	Set_Has_No_Elaboration_Code (info->gnat_node, 1);
+    }
+
+  /* We cannot track the location of errors past this point.  */
+  error_gnat_node = Empty;
+}
+
+/* Return a positive value if an lvalue is required for GNAT_NODE.
+   GNU_TYPE is the type that will be used for GNAT_NODE in the
+   translated GNU tree.  ALIASED indicates whether the underlying
+   object represented by GNAT_NODE is aliased in the Ada sense.
+
+   The function climbs up the GNAT tree starting from the node and
+   returns 1 upon encountering a node that effectively requires an
+   lvalue downstream.  It returns int instead of bool to facilitate
+   usage in non purely binary logic contexts.  */
+
+static int
+lvalue_required_p (Node_Id gnat_node, tree gnu_type, int aliased)
+{
+  Node_Id gnat_parent = Parent (gnat_node), gnat_temp;
+
+  switch (Nkind (gnat_parent))
+    {
+    case N_Reference:
+      return 1;
+
+    case N_Attribute_Reference:
+      {
+	unsigned char id = Get_Attribute_Id (Attribute_Name (gnat_parent));
+	return id == Attr_Address
+	       || id == Attr_Access
+	       || id == Attr_Unchecked_Access
+	       || id == Attr_Unrestricted_Access;
+      }
+
+    case N_Parameter_Association:
+    case N_Function_Call:
+    case N_Procedure_Call_Statement:
+      return (must_pass_by_ref (gnu_type) || default_pass_by_ref (gnu_type));
+
+    case N_Indexed_Component:
+      /* Only the array expression can require an lvalue.  */
+      if (Prefix (gnat_parent) != gnat_node)
+	return 0;
+
+      /* ??? Consider that referencing an indexed component with a
+	 non-constant index forces the whole aggregate to memory.
+	 Note that N_Integer_Literal is conservative, any static
+	 expression in the RM sense could probably be accepted.  */
+      for (gnat_temp = First (Expressions (gnat_parent));
+	   Present (gnat_temp);
+	   gnat_temp = Next (gnat_temp))
+	if (Nkind (gnat_temp) != N_Integer_Literal)
+	  return 1;
+
+      /* ... fall through ... */
+
+    case N_Slice:
+      /* Only the array expression can require an lvalue.  */
+      if (Prefix (gnat_parent) != gnat_node)
+	return 0;
+
+      aliased |= Has_Aliased_Components (Etype (gnat_node));
+      return lvalue_required_p (gnat_parent, gnu_type, aliased);
+
+    case N_Selected_Component:
+      aliased |= Is_Aliased (Entity (Selector_Name (gnat_parent)));
+      return lvalue_required_p (gnat_parent, gnu_type, aliased);
+
+    case N_Object_Renaming_Declaration:
+      /* We need to make a real renaming only if the constant object is
+	 aliased or if we may use a renaming pointer; otherwise we can
+	 optimize and return the rvalue.  We make an exception if the object
+	 is an identifier since in this case the rvalue can be propagated
+	 attached to the CONST_DECL.  */
+      return (aliased != 0
+	      /* This should match the constant case of the renaming code.  */
+	      || Is_Composite_Type (Etype (Name (gnat_parent)))
+	      || Nkind (Name (gnat_parent)) == N_Identifier);
+
+    default:
+      return 0;
+    }
+
+  gcc_unreachable ();
+}
+
+/* Subroutine of gnat_to_gnu to translate gnat_node, an N_Identifier,
+   to a GCC tree, which is returned.  GNU_RESULT_TYPE_P is a pointer
+   to where we should place the result type.  */
+
+static tree
+Identifier_to_gnu (Node_Id gnat_node, tree *gnu_result_type_p)
+{
+  Node_Id gnat_temp, gnat_temp_type;
+  tree gnu_result, gnu_result_type;
+
+  /* Whether we should require an lvalue for GNAT_NODE.  Needed in
+     specific circumstances only, so evaluated lazily.  < 0 means
+     unknown, > 0 means known true, 0 means known false.  */
+  int require_lvalue = -1;
+
+  /* If GNAT_NODE is a constant, whether we should use the initialization
+     value instead of the constant entity, typically for scalars with an
+     address clause when the parent doesn't require an lvalue.  */
+  bool use_constant_initializer = false;
+
+  /* If the Etype of this node does not equal the Etype of the Entity,
+     something is wrong with the entity map, probably in generic
+     instantiation. However, this does not apply to types. Since we sometime
+     have strange Ekind's, just do this test for objects. Also, if the Etype of
+     the Entity is private, the Etype of the N_Identifier is allowed to be the
+     full type and also we consider a packed array type to be the same as the
+     original type. Similarly, a class-wide type is equivalent to a subtype of
+     itself. Finally, if the types are Itypes, one may be a copy of the other,
+     which is also legal.  */
+  gnat_temp = (Nkind (gnat_node) == N_Defining_Identifier
+	       ? gnat_node : Entity (gnat_node));
+  gnat_temp_type = Etype (gnat_temp);
+
+  gcc_assert (Etype (gnat_node) == gnat_temp_type
+	      || (Is_Packed (gnat_temp_type)
+		  && Etype (gnat_node) == Packed_Array_Type (gnat_temp_type))
+	      || (Is_Class_Wide_Type (Etype (gnat_node)))
+	      || (IN (Ekind (gnat_temp_type), Private_Kind)
+		  && Present (Full_View (gnat_temp_type))
+		  && ((Etype (gnat_node) == Full_View (gnat_temp_type))
+		      || (Is_Packed (Full_View (gnat_temp_type))
+			  && (Etype (gnat_node)
+			      == Packed_Array_Type (Full_View
+						    (gnat_temp_type))))))
+	      || (Is_Itype (Etype (gnat_node)) && Is_Itype (gnat_temp_type))
+	      || !(Ekind (gnat_temp) == E_Variable
+		   || Ekind (gnat_temp) == E_Component
+		   || Ekind (gnat_temp) == E_Constant
+		   || Ekind (gnat_temp) == E_Loop_Parameter
+		   || IN (Ekind (gnat_temp), Formal_Kind)));
+
+  /* If this is a reference to a deferred constant whose partial view is an
+     unconstrained private type, the proper type is on the full view of the
+     constant, not on the full view of the type, which may be unconstrained.
+
+     This may be a reference to a type, for example in the prefix of the
+     attribute Position, generated for dispatching code (see Make_DT in
+     exp_disp,adb). In that case we need the type itself, not is parent,
+     in particular if it is a derived type  */
+  if (Is_Private_Type (gnat_temp_type)
+      && Has_Unknown_Discriminants (gnat_temp_type)
+      && Ekind (gnat_temp) == E_Constant
+      && Present (Full_View (gnat_temp)))
+    {
+      gnat_temp = Full_View (gnat_temp);
+      gnat_temp_type = Etype (gnat_temp);
+    }
+  else
+    {
+      /* We want to use the Actual_Subtype if it has already been elaborated,
+	 otherwise the Etype.  Avoid using Actual_Subtype for packed arrays to
+	 simplify things.  */
+      if ((Ekind (gnat_temp) == E_Constant
+	   || Ekind (gnat_temp) == E_Variable || Is_Formal (gnat_temp))
+	  && !(Is_Array_Type (Etype (gnat_temp))
+	       && Present (Packed_Array_Type (Etype (gnat_temp))))
+	  && Present (Actual_Subtype (gnat_temp))
+	  && present_gnu_tree (Actual_Subtype (gnat_temp)))
+	gnat_temp_type = Actual_Subtype (gnat_temp);
+      else
+	gnat_temp_type = Etype (gnat_node);
+    }
+
+  /* Expand the type of this identifier first, in case it is an enumeral
+     literal, which only get made when the type is expanded.  There is no
+     order-of-elaboration issue here.  */
+  gnu_result_type = get_unpadded_type (gnat_temp_type);
+
+  /* If this is a non-imported scalar constant with an address clause,
+     retrieve the value instead of a pointer to be dereferenced unless
+     an lvalue is required.  This is generally more efficient and actually
+     required if this is a static expression because it might be used
+     in a context where a dereference is inappropriate, such as a case
+     statement alternative or a record discriminant.  There is no possible
+     volatile-ness short-circuit here since Volatile constants must be imported
+     per C.6. */
+  if (Ekind (gnat_temp) == E_Constant && Is_Scalar_Type (gnat_temp_type)
+      && !Is_Imported (gnat_temp)
+      && Present (Address_Clause (gnat_temp)))
+    {
+      require_lvalue = lvalue_required_p (gnat_node, gnu_result_type,
+					  Is_Aliased (gnat_temp));
+      use_constant_initializer = !require_lvalue;
+    }
+
+  if (use_constant_initializer)
+    {
+      /* If this is a deferred constant, the initializer is attached to
+	 the full view.  */
+      if (Present (Full_View (gnat_temp)))
+	gnat_temp = Full_View (gnat_temp);
+
+      gnu_result = gnat_to_gnu (Expression (Declaration_Node (gnat_temp)));
+    }
+  else
+    gnu_result = gnat_to_gnu_entity (gnat_temp, NULL_TREE, 0);
+
+  /* If we are in an exception handler, force this variable into memory to
+     ensure optimization does not remove stores that appear redundant but are
+     actually needed in case an exception occurs.
+
+     ??? Note that we need not do this if the variable is declared within the
+     handler, only if it is referenced in the handler and declared in an
+     enclosing block, but we have no way of testing that right now.
+
+     ??? We used to essentially set the TREE_ADDRESSABLE flag on the variable
+     here, but it can now be removed by the Tree aliasing machinery if the
+     address of the variable is never taken.  All we can do is to make the
+     variable volatile, which might incur the generation of temporaries just
+     to access the memory in some circumstances.  This can be avoided for
+     variables of non-constant size because they are automatically allocated
+     to memory.  There might be no way of allocating a proper temporary for
+     them in any case.  We only do this for SJLJ though.  */
+  if (TREE_VALUE (gnu_except_ptr_stack)
+      && TREE_CODE (gnu_result) == VAR_DECL
+      && TREE_CODE (DECL_SIZE_UNIT (gnu_result)) == INTEGER_CST)
+    TREE_THIS_VOLATILE (gnu_result) = TREE_SIDE_EFFECTS (gnu_result) = 1;
+
+  /* Some objects (such as parameters passed by reference, globals of
+     variable size, and renamed objects) actually represent the address
+     of the object.  In that case, we must do the dereference.  Likewise,
+     deal with parameters to foreign convention subprograms.  */
+  if (DECL_P (gnu_result)
+      && (DECL_BY_REF_P (gnu_result)
+	  || (TREE_CODE (gnu_result) == PARM_DECL
+	      && DECL_BY_COMPONENT_PTR_P (gnu_result))))
+    {
+      bool ro = DECL_POINTS_TO_READONLY_P (gnu_result);
+      tree renamed_obj;
+
+      if (TREE_CODE (gnu_result) == PARM_DECL
+	  && DECL_BY_COMPONENT_PTR_P (gnu_result))
+	gnu_result
+	  = build_unary_op (INDIRECT_REF, NULL_TREE,
+			    convert (build_pointer_type (gnu_result_type),
+				     gnu_result));
+
+      /* If it's a renaming pointer and we are at the right binding level,
+	 we can reference the renamed object directly, since the renamed
+	 expression has been protected against multiple evaluations.  */
+      else if (TREE_CODE (gnu_result) == VAR_DECL
+	       && (renamed_obj = DECL_RENAMED_OBJECT (gnu_result)) != 0
+	       && (! DECL_RENAMING_GLOBAL_P (gnu_result)
+		   || global_bindings_p ()))
+	gnu_result = renamed_obj;
+
+      /* Return the underlying CST for a CONST_DECL like a few lines below,
+	 after dereferencing in this case.  */
+      else if (TREE_CODE (gnu_result) == CONST_DECL)
+	gnu_result = build_unary_op (INDIRECT_REF, NULL_TREE,
+				     DECL_INITIAL (gnu_result));
+
+      else
+	gnu_result = build_unary_op (INDIRECT_REF, NULL_TREE, gnu_result);
+
+      TREE_READONLY (gnu_result) = TREE_STATIC (gnu_result) = ro;
+    }
+
+  /* The GNAT tree has the type of a function as the type of its result.  Also
+     use the type of the result if the Etype is a subtype which is nominally
+     unconstrained.  But remove any padding from the resulting type.  */
+  if (TREE_CODE (TREE_TYPE (gnu_result)) == FUNCTION_TYPE
+      || Is_Constr_Subt_For_UN_Aliased (gnat_temp_type))
+    {
+      gnu_result_type = TREE_TYPE (gnu_result);
+      if (TREE_CODE (gnu_result_type) == RECORD_TYPE
+	  && TYPE_IS_PADDING_P (gnu_result_type))
+	gnu_result_type = TREE_TYPE (TYPE_FIELDS (gnu_result_type));
+    }
+
+  /* If we have a constant declaration and its initializer at hand,
+     try to return the latter to avoid the need to call fold in lots
+     of places and the need of elaboration code if this Id is used as
+     an initializer itself.  */
+  if (TREE_CONSTANT (gnu_result)
+      && DECL_P (gnu_result)
+      && DECL_INITIAL (gnu_result))
+    {
+      tree object
+	= (TREE_CODE (gnu_result) == CONST_DECL
+	   ? DECL_CONST_CORRESPONDING_VAR (gnu_result) : gnu_result);
+
+      /* If there is a corresponding variable, we only want to return
+	 the CST value if an lvalue is not required.  Evaluate this
+	 now if we have not already done so.  */
+      if (object && require_lvalue < 0)
+	require_lvalue = lvalue_required_p (gnat_node, gnu_result_type,
+					    Is_Aliased (gnat_temp));
+
+      if (!object || !require_lvalue)
+	gnu_result = unshare_expr (DECL_INITIAL (gnu_result));
+    }
+
+  *gnu_result_type_p = gnu_result_type;
+  return gnu_result;
+}
+
+/* Subroutine of gnat_to_gnu to process gnat_node, an N_Pragma.  Return
+   any statements we generate.  */
+
+static tree
+Pragma_to_gnu (Node_Id gnat_node)
+{
+  Node_Id gnat_temp;
+  tree gnu_result = alloc_stmt_list ();
+
+  /* Check for (and ignore) unrecognized pragma and do nothing if we are just
+     annotating types.  */
+  if (type_annotate_only
+      || !Is_Pragma_Name (Chars (Pragma_Identifier (gnat_node))))
+    return gnu_result;
+
+  switch (Get_Pragma_Id (Chars (Pragma_Identifier (gnat_node))))
+    {
+    case Pragma_Inspection_Point:
+      /* Do nothing at top level: all such variables are already viewable.  */
+      if (global_bindings_p ())
+	break;
+
+      for (gnat_temp = First (Pragma_Argument_Associations (gnat_node));
+	   Present (gnat_temp);
+	   gnat_temp = Next (gnat_temp))
+	{
+	  Node_Id gnat_expr = Expression (gnat_temp);
+	  tree gnu_expr = gnat_to_gnu (gnat_expr);
+	  int use_address;
+	  enum machine_mode mode;
+	  tree asm_constraint = NULL_TREE;
+#ifdef ASM_COMMENT_START
+	  char *comment;
+#endif
+
+	  if (TREE_CODE (gnu_expr) == UNCONSTRAINED_ARRAY_REF)
+	    gnu_expr = TREE_OPERAND (gnu_expr, 0);
+
+	  /* Use the value only if it fits into a normal register,
+	     otherwise use the address.  */
+	  mode = TYPE_MODE (TREE_TYPE (gnu_expr));
+	  use_address = ((GET_MODE_CLASS (mode) != MODE_INT
+			  && GET_MODE_CLASS (mode) != MODE_PARTIAL_INT)
+			 || GET_MODE_SIZE (mode) > UNITS_PER_WORD);
+
+	  if (use_address)
+	    gnu_expr = build_unary_op (ADDR_EXPR, NULL_TREE, gnu_expr);
+
+#ifdef ASM_COMMENT_START
+	  comment = concat (ASM_COMMENT_START,
+			    " inspection point: ",
+			    Get_Name_String (Chars (gnat_expr)),
+			    use_address ? " address" : "",
+			    " is in %0",
+			    NULL);
+	  asm_constraint = build_string (strlen (comment), comment);
+	  free (comment);
+#endif
+	  gnu_expr = build4 (ASM_EXPR, void_type_node,
+			     asm_constraint,
+			     NULL_TREE,
+			     tree_cons
+			     (build_tree_list (NULL_TREE,
+					       build_string (1, "g")),
+			      gnu_expr, NULL_TREE),
+			     NULL_TREE);
+	  ASM_VOLATILE_P (gnu_expr) = 1;
+	  set_expr_location_from_node (gnu_expr, gnat_node);
+	  append_to_statement_list (gnu_expr, &gnu_result);
+	}
+      break;
+
+    case Pragma_Optimize:
+      switch (Chars (Expression
+		     (First (Pragma_Argument_Associations (gnat_node)))))
+	{
+	case Name_Time:  case Name_Space:
+	  if (optimize == 0)
+	    post_error ("insufficient -O value?", gnat_node);
+	  break;
+
+	case Name_Off:
+	  if (optimize != 0)
+	    post_error ("must specify -O0?", gnat_node);
+	  break;
+
+	default:
+	  gcc_unreachable ();
+	}
+      break;
+
+    case Pragma_Reviewable:
+      if (write_symbols == NO_DEBUG)
+	post_error ("must specify -g?", gnat_node);
+      break;
+    }
+
+  return gnu_result;
+}
+/* Subroutine of gnat_to_gnu to translate gnat_node, an N_Attribute,
+   to a GCC tree, which is returned.  GNU_RESULT_TYPE_P is a pointer to
+   where we should place the result type.  ATTRIBUTE is the attribute ID.  */
+
+static tree
+Attribute_to_gnu (Node_Id gnat_node, tree *gnu_result_type_p, int attribute)
+{
+  tree gnu_result = error_mark_node;
+  tree gnu_result_type;
+  tree gnu_expr;
+  bool prefix_unused = false;
+  tree gnu_prefix = gnat_to_gnu (Prefix (gnat_node));
+  tree gnu_type = TREE_TYPE (gnu_prefix);
+
+  /* If the input is a NULL_EXPR, make a new one.  */
+  if (TREE_CODE (gnu_prefix) == NULL_EXPR)
+    {
+      *gnu_result_type_p = get_unpadded_type (Etype (gnat_node));
+      return build1 (NULL_EXPR, *gnu_result_type_p,
+		     TREE_OPERAND (gnu_prefix, 0));
+    }
+
+  switch (attribute)
+    {
+    case Attr_Pos:
+    case Attr_Val:
+      /* These are just conversions until since representation clauses for
+	 enumerations are handled in the front end.  */
+      {
+	bool checkp = Do_Range_Check (First (Expressions (gnat_node)));
+
+	gnu_result = gnat_to_gnu (First (Expressions (gnat_node)));
+	gnu_result_type = get_unpadded_type (Etype (gnat_node));
+	gnu_result = convert_with_check (Etype (gnat_node), gnu_result,
+					 checkp, checkp, true);
+      }
+      break;
+
+    case Attr_Pred:
+    case Attr_Succ:
+      /* These just add or subject the constant 1.  Representation clauses for
+	 enumerations are handled in the front-end.  */
+      gnu_expr = gnat_to_gnu (First (Expressions (gnat_node)));
+      gnu_result_type = get_unpadded_type (Etype (gnat_node));
+
+      if (Do_Range_Check (First (Expressions (gnat_node))))
+	{
+	  gnu_expr = protect_multiple_eval (gnu_expr);
+	  gnu_expr
+	    = emit_check
+	      (build_binary_op (EQ_EXPR, integer_type_node,
+				gnu_expr,
+				attribute == Attr_Pred
+				? TYPE_MIN_VALUE (gnu_result_type)
+				: TYPE_MAX_VALUE (gnu_result_type)),
+	       gnu_expr, CE_Range_Check_Failed);
+	}
+
+      gnu_result
+	= build_binary_op (attribute == Attr_Pred
+			   ? MINUS_EXPR : PLUS_EXPR,
+			   gnu_result_type, gnu_expr,
+			   convert (gnu_result_type, integer_one_node));
+      break;
+
+    case Attr_Address:
+    case Attr_Unrestricted_Access:
+      /* Conversions don't change something's address but can cause us to miss
+	 the COMPONENT_REF case below, so strip them off.  */
+      gnu_prefix = remove_conversions (gnu_prefix,
+				       !Must_Be_Byte_Aligned (gnat_node));
+
+      /* If we are taking 'Address of an unconstrained object, this is the
+	 pointer to the underlying array.  */
+      if (attribute == Attr_Address)
+	gnu_prefix = maybe_unconstrained_array (gnu_prefix);
+
+      /* If we are building a static dispatch table, we have to honor
+	 TARGET_VTABLE_USES_DESCRIPTORS if we want to be compatible
+	 with the C++ ABI.  We do it in the non-static case as well,
+	 see gnat_to_gnu_entity, case E_Access_Subprogram_Type.  */
+      else if (TARGET_VTABLE_USES_DESCRIPTORS
+	       && Is_Dispatch_Table_Entity (Etype (gnat_node)))
+	{
+	  tree gnu_field, gnu_list = NULL_TREE, t;
+	  /* Descriptors can only be built here for top-level functions.  */
+	  bool build_descriptor = (global_bindings_p () != 0);
+	  int i;
+
+	  gnu_result_type = get_unpadded_type (Etype (gnat_node));
+
+	  /* If we're not going to build the descriptor, we have to retrieve
+	     the one which will be built by the linker (or by the compiler
+	     later if a static chain is requested).  */
+	  if (!build_descriptor)
+	    {
+	      gnu_result = build_unary_op (ADDR_EXPR, NULL_TREE, gnu_prefix);
+	      gnu_result = fold_convert (build_pointer_type (gnu_result_type),
+					 gnu_result);
+	      gnu_result = build1 (INDIRECT_REF, gnu_result_type, gnu_result);
+	    }
+
+	  for (gnu_field = TYPE_FIELDS (gnu_result_type), i = 0;
+	       i < TARGET_VTABLE_USES_DESCRIPTORS;
+	       gnu_field = TREE_CHAIN (gnu_field), i++)
+	    {
+	      if (build_descriptor)
+		{
+		  t = build2 (FDESC_EXPR, TREE_TYPE (gnu_field), gnu_prefix,
+			      build_int_cst (NULL_TREE, i));
+		  TREE_CONSTANT (t) = 1;
+		}
+	      else
+		t = build3 (COMPONENT_REF, ptr_void_ftype, gnu_result,
+			    gnu_field, NULL_TREE);
+
+	      gnu_list = tree_cons (gnu_field, t, gnu_list);
+	    }
+
+	  gnu_result = gnat_build_constructor (gnu_result_type, gnu_list);
+	  break;
+	}
+
+      /* ... fall through ... */
+
+    case Attr_Access:
+    case Attr_Unchecked_Access:
+    case Attr_Code_Address:
+      gnu_result_type = get_unpadded_type (Etype (gnat_node));
+      gnu_result
+	= build_unary_op (((attribute == Attr_Address
+			    || attribute == Attr_Unrestricted_Access)
+			   && !Must_Be_Byte_Aligned (gnat_node))
+			  ? ATTR_ADDR_EXPR : ADDR_EXPR,
+			  gnu_result_type, gnu_prefix);
+
+      /* For 'Code_Address, find an inner ADDR_EXPR and mark it so that we
+	 don't try to build a trampoline.  */
+      if (attribute == Attr_Code_Address)
+	{
+	  for (gnu_expr = gnu_result;
+	       CONVERT_EXPR_P (gnu_expr);
+	       gnu_expr = TREE_OPERAND (gnu_expr, 0))
+	    TREE_CONSTANT (gnu_expr) = 1;
+
+	  if (TREE_CODE (gnu_expr) == ADDR_EXPR)
+	    TREE_NO_TRAMPOLINE (gnu_expr) = TREE_CONSTANT (gnu_expr) = 1;
+	}
+
+      /* For other address attributes applied to a nested function,
+	 find an inner ADDR_EXPR and annotate it so that we can issue
+	 a useful warning with -Wtrampolines.  */
+      else if (TREE_CODE (TREE_TYPE (gnu_prefix)) == FUNCTION_TYPE)
+	{
+	  for (gnu_expr = gnu_result;
+	       CONVERT_EXPR_P (gnu_expr);
+	       gnu_expr = TREE_OPERAND (gnu_expr, 0))
+	    ;
+
+	  if (TREE_CODE (gnu_expr) == ADDR_EXPR
+	      && decl_function_context (TREE_OPERAND (gnu_expr, 0)))
+	    {
+	      set_expr_location_from_node (gnu_expr, gnat_node);
+
+	      /* Check that we're not violating the No_Implicit_Dynamic_Code
+		 restriction.  Be conservative if we don't know anything
+		 about the trampoline strategy for the target.  */
+	      Check_Implicit_Dynamic_Code_Allowed (gnat_node);
+	    }
+	}
+      break;
+
+    case Attr_Pool_Address:
+      {
+	tree gnu_obj_type;
+	tree gnu_ptr = gnu_prefix;
+
+	gnu_result_type = get_unpadded_type (Etype (gnat_node));
+
+	/* If this is an unconstrained array, we know the object must have been
+	   allocated with the template in front of the object.  So compute the
+	   template address.*/
+	if (TYPE_FAT_POINTER_P (TREE_TYPE (gnu_ptr)))
+	  gnu_ptr
+	    = convert (build_pointer_type
+		       (TYPE_OBJECT_RECORD_TYPE
+			(TYPE_UNCONSTRAINED_ARRAY (TREE_TYPE (gnu_ptr)))),
+		       gnu_ptr);
+
+	gnu_obj_type = TREE_TYPE (TREE_TYPE (gnu_ptr));
+	if (TREE_CODE (gnu_obj_type) == RECORD_TYPE
+	    && TYPE_CONTAINS_TEMPLATE_P (gnu_obj_type))
+	  {
+	    tree gnu_char_ptr_type = build_pointer_type (char_type_node);
+	    tree gnu_pos = byte_position (TYPE_FIELDS (gnu_obj_type));
+	    tree gnu_byte_offset
+	      = convert (sizetype,
+			 size_diffop (size_zero_node, gnu_pos));
+	    gnu_byte_offset = fold_build1 (NEGATE_EXPR, sizetype, gnu_byte_offset);
+
+	    gnu_ptr = convert (gnu_char_ptr_type, gnu_ptr);
+	    gnu_ptr = build_binary_op (POINTER_PLUS_EXPR, gnu_char_ptr_type,
+				       gnu_ptr, gnu_byte_offset);
+	  }
+
+	gnu_result = convert (gnu_result_type, gnu_ptr);
+      }
+      break;
+
+    case Attr_Size:
+    case Attr_Object_Size:
+    case Attr_Value_Size:
+    case Attr_Max_Size_In_Storage_Elements:
+      gnu_expr = gnu_prefix;
+
+      /* Remove NOPS from gnu_expr and conversions from gnu_prefix.
+	 We only use GNU_EXPR to see if a COMPONENT_REF was involved. */
+      while (TREE_CODE (gnu_expr) == NOP_EXPR)
+	gnu_expr = TREE_OPERAND (gnu_expr, 0);
+
+      gnu_prefix = remove_conversions (gnu_prefix, true);
+      prefix_unused = true;
+      gnu_type = TREE_TYPE (gnu_prefix);
+
+      /* Replace an unconstrained array type with the type of the underlying
+	 array.  We can't do this with a call to maybe_unconstrained_array
+	 since we may have a TYPE_DECL.  For 'Max_Size_In_Storage_Elements,
+	 use the record type that will be used to allocate the object and its
+	 template.  */
+      if (TREE_CODE (gnu_type) == UNCONSTRAINED_ARRAY_TYPE)
+	{
+	  gnu_type = TYPE_OBJECT_RECORD_TYPE (gnu_type);
+	  if (attribute != Attr_Max_Size_In_Storage_Elements)
+	    gnu_type = TREE_TYPE (TREE_CHAIN (TYPE_FIELDS (gnu_type)));
+	}
+
+      /* If we're looking for the size of a field, return the field size.
+	 Otherwise, if the prefix is an object, or if 'Object_Size or
+	 'Max_Size_In_Storage_Elements has been specified, the result is the
+	 GCC size of the type.  Otherwise, the result is the RM_Size of the
+	 type.  */
+      if (TREE_CODE (gnu_prefix) == COMPONENT_REF)
+	gnu_result = DECL_SIZE (TREE_OPERAND (gnu_prefix, 1));
+      else if (TREE_CODE (gnu_prefix) != TYPE_DECL
+	       || attribute == Attr_Object_Size
+	       || attribute == Attr_Max_Size_In_Storage_Elements)
+	{
+	  /* If this is a padded type, the GCC size isn't relevant to the
+	     programmer.  Normally, what we want is the RM_Size, which was set
+	     from the specified size, but if it was not set, we want the size
+	     of the relevant field.  Using the MAX of those two produces the
+	     right result in all case.  Don't use the size of the field if it's
+	     a self-referential type, since that's never what's wanted.  */
+	  if (TREE_CODE (gnu_type) == RECORD_TYPE
+	      && TYPE_IS_PADDING_P (gnu_type)
+	      && TREE_CODE (gnu_expr) == COMPONENT_REF)
+	    {
+	      gnu_result = rm_size (gnu_type);
+	      if (!(CONTAINS_PLACEHOLDER_P
+		    (DECL_SIZE (TREE_OPERAND (gnu_expr, 1)))))
+		gnu_result
+		  = size_binop (MAX_EXPR, gnu_result,
+				DECL_SIZE (TREE_OPERAND (gnu_expr, 1)));
+	    }
+	  else if (Nkind (Prefix (gnat_node)) == N_Explicit_Dereference)
+	    {
+	      Node_Id gnat_deref = Prefix (gnat_node);
+	      Node_Id gnat_actual_subtype = Actual_Designated_Subtype (gnat_deref);
+	      tree gnu_ptr_type = TREE_TYPE (gnat_to_gnu (Prefix (gnat_deref)));
+	      if (TYPE_FAT_OR_THIN_POINTER_P (gnu_ptr_type)
+	  	&& Present (gnat_actual_subtype))
+	        {
+		  tree gnu_actual_obj_type = gnat_to_gnu_type (gnat_actual_subtype);
+		  gnu_type = build_unc_object_type_from_ptr (gnu_ptr_type,
+			       gnu_actual_obj_type, get_identifier ("SIZE"));
+	        }
+
+	      gnu_result = TYPE_SIZE (gnu_type);
+	    }
+	  else
+	    gnu_result = TYPE_SIZE (gnu_type);
+	}
+      else
+	gnu_result = rm_size (gnu_type);
+
+      gcc_assert (gnu_result);
+
+      /* Deal with a self-referential size by returning the maximum size for a
+	 type and by qualifying the size with the object for 'Size of an
+	 object.  */
+      if (CONTAINS_PLACEHOLDER_P (gnu_result))
+	{
+	  if (TREE_CODE (gnu_prefix) != TYPE_DECL)
+	    gnu_result = substitute_placeholder_in_expr (gnu_result, gnu_expr);
+	  else
+	    gnu_result = max_size (gnu_result, true);
+	}
+
+      /* If the type contains a template, subtract its size.  */
+      if (TREE_CODE (gnu_type) == RECORD_TYPE
+	  && TYPE_CONTAINS_TEMPLATE_P (gnu_type))
+	gnu_result = size_binop (MINUS_EXPR, gnu_result,
+				 DECL_SIZE (TYPE_FIELDS (gnu_type)));
+
+      gnu_result_type = get_unpadded_type (Etype (gnat_node));
+
+      /* Always perform division using unsigned arithmetic as the size cannot
+	 be negative, but may be an overflowed positive value. This provides
+	 correct results for sizes up to 512 MB.
+
+	 ??? Size should be calculated in storage elements directly.  */
+
+      if (attribute == Attr_Max_Size_In_Storage_Elements)
+	gnu_result = convert (sizetype,
+			      fold_build2 (CEIL_DIV_EXPR, bitsizetype,
+					   gnu_result, bitsize_unit_node));
+      break;
+
+    case Attr_Alignment:
+      if (TREE_CODE (gnu_prefix) == COMPONENT_REF
+	  && (TREE_CODE (TREE_TYPE (TREE_OPERAND (gnu_prefix, 0)))
+	      == RECORD_TYPE)
+	  && (TYPE_IS_PADDING_P (TREE_TYPE (TREE_OPERAND (gnu_prefix, 0)))))
+	gnu_prefix = TREE_OPERAND (gnu_prefix, 0);
+
+      gnu_type = TREE_TYPE (gnu_prefix);
+      gnu_result_type = get_unpadded_type (Etype (gnat_node));
+      prefix_unused = true;
+
+      gnu_result = size_int ((TREE_CODE (gnu_prefix) == COMPONENT_REF
+			      ? DECL_ALIGN (TREE_OPERAND (gnu_prefix, 1))
+			      : TYPE_ALIGN (gnu_type)) / BITS_PER_UNIT);
+      break;
+
+    case Attr_First:
+    case Attr_Last:
+    case Attr_Range_Length:
+      prefix_unused = true;
+
+      if (INTEGRAL_TYPE_P (gnu_type) || TREE_CODE (gnu_type) == REAL_TYPE)
+	{
+	  gnu_result_type = get_unpadded_type (Etype (gnat_node));
+
+	  if (attribute == Attr_First)
+	    gnu_result = TYPE_MIN_VALUE (gnu_type);
+	  else if (attribute == Attr_Last)
+	    gnu_result = TYPE_MAX_VALUE (gnu_type);
+	  else
+	    gnu_result
+	      = build_binary_op
+		(MAX_EXPR, get_base_type (gnu_result_type),
+		 build_binary_op
+		 (PLUS_EXPR, get_base_type (gnu_result_type),
+		  build_binary_op (MINUS_EXPR,
+				   get_base_type (gnu_result_type),
+				   convert (gnu_result_type,
+					    TYPE_MAX_VALUE (gnu_type)),
+				   convert (gnu_result_type,
+					    TYPE_MIN_VALUE (gnu_type))),
+		  convert (gnu_result_type, integer_one_node)),
+		 convert (gnu_result_type, integer_zero_node));
+
+	  break;
+	}
+
+      /* ... fall through ... */
+
+    case Attr_Length:
+      {
+	int Dimension = (Present (Expressions (gnat_node))
+			 ? UI_To_Int (Intval (First (Expressions (gnat_node))))
+			 : 1), i;
+	struct parm_attr *pa = NULL;
+	Entity_Id gnat_param = Empty;
+
+	/* Make sure any implicit dereference gets done.  */
+	gnu_prefix = maybe_implicit_deref (gnu_prefix);
+	gnu_prefix = maybe_unconstrained_array (gnu_prefix);
+	/* We treat unconstrained array In parameters specially.  */
+	if (Nkind (Prefix (gnat_node)) == N_Identifier
+	    && !Is_Constrained (Etype (Prefix (gnat_node)))
+	    && Ekind (Entity (Prefix (gnat_node))) == E_In_Parameter)
+	  gnat_param = Entity (Prefix (gnat_node));
+	gnu_type = TREE_TYPE (gnu_prefix);
+	prefix_unused = true;
+	gnu_result_type = get_unpadded_type (Etype (gnat_node));
+
+	if (TYPE_CONVENTION_FORTRAN_P (gnu_type))
+	  {
+	    int ndim;
+	    tree gnu_type_temp;
+
+	    for (ndim = 1, gnu_type_temp = gnu_type;
+		 TREE_CODE (TREE_TYPE (gnu_type_temp)) == ARRAY_TYPE
+		 && TYPE_MULTI_ARRAY_P (TREE_TYPE (gnu_type_temp));
+		 ndim++, gnu_type_temp = TREE_TYPE (gnu_type_temp))
+	      ;
+
+	    Dimension = ndim + 1 - Dimension;
+	  }
+
+	for (i = 1; i < Dimension; i++)
+	  gnu_type = TREE_TYPE (gnu_type);
+
+	gcc_assert (TREE_CODE (gnu_type) == ARRAY_TYPE);
+
+	/* When not optimizing, look up the slot associated with the parameter
+	   and the dimension in the cache and create a new one on failure.  */
+	if (!optimize && Present (gnat_param))
+	  {
+	    for (i = 0; VEC_iterate (parm_attr, f_parm_attr_cache, i, pa); i++)
+	      if (pa->id == gnat_param && pa->dim == Dimension)
+		break;
+
+	    if (!pa)
+	      {
+		pa = GGC_CNEW (struct parm_attr);
+		pa->id = gnat_param;
+		pa->dim = Dimension;
+		VEC_safe_push (parm_attr, gc, f_parm_attr_cache, pa);
+	      }
+	  }
+
+	/* Return the cached expression or build a new one.  */
+	if (attribute == Attr_First)
+	  {
+	    if (pa && pa->first)
+	      {
+		gnu_result = pa->first;
+		break;
+	      }
+
+	    gnu_result
+	      = TYPE_MIN_VALUE (TYPE_INDEX_TYPE (TYPE_DOMAIN (gnu_type)));
+	  }
+
+	else if (attribute == Attr_Last)
+	  {
+	    if (pa && pa->last)
+	      {
+		gnu_result = pa->last;
+		break;
+	      }
+
+	    gnu_result
+	      = TYPE_MAX_VALUE (TYPE_INDEX_TYPE (TYPE_DOMAIN (gnu_type)));
+	  }
+
+	else /* attribute == Attr_Range_Length || attribute == Attr_Length  */
+	  {
+	    if (pa && pa->length)
+	      {
+		gnu_result = pa->length;
+		break;
+	      }
+	    else
+	      {
+		/* We used to compute the length as max (hb - lb + 1, 0),
+		   which could overflow for some cases of empty arrays, e.g.
+		   when lb == index_type'first.  We now compute the length as
+		   (hb < lb) ? 0 : hb - lb + 1, which would only overflow in
+		   much rarer cases, for extremely large arrays we expect
+		   never to encounter in practice.  In addition, the former
+		   computation required the use of potentially constraining
+		   signed arithmetic while the latter doesn't.  */
+		
+		tree gnu_compute_type = get_base_type (gnu_result_type);
+
+		tree index_type
+		  = TYPE_INDEX_TYPE (TYPE_DOMAIN (gnu_type));
+		tree lb
+		  = convert (gnu_compute_type, TYPE_MIN_VALUE (index_type));
+		tree hb
+		  = convert (gnu_compute_type, TYPE_MAX_VALUE (index_type));
+		
+		gnu_result
+		  = build3
+		    (COND_EXPR, gnu_compute_type,
+		     build_binary_op (LT_EXPR, gnu_compute_type, hb, lb),
+		     convert (gnu_compute_type, integer_zero_node),
+		     build_binary_op
+		     (PLUS_EXPR, gnu_compute_type,
+		      build_binary_op (MINUS_EXPR, gnu_compute_type, hb, lb),
+		      convert (gnu_compute_type, integer_one_node)));
+	      }
+	  }
+
+	/* If this has a PLACEHOLDER_EXPR, qualify it by the object we are
+	   handling.  Note that these attributes could not have been used on
+	   an unconstrained array type.  */
+	gnu_result = SUBSTITUTE_PLACEHOLDER_IN_EXPR (gnu_result,
+						     gnu_prefix);
+
+	/* Cache the expression we have just computed.  Since we want to do it
+	   at runtime, we force the use of a SAVE_EXPR and let the gimplifier
+	   create the temporary.  */
+	if (pa)
+	  {
+	    gnu_result
+	      = build1 (SAVE_EXPR, TREE_TYPE (gnu_result), gnu_result);
+	    TREE_SIDE_EFFECTS (gnu_result) = 1;
+	    if (attribute == Attr_First)
+	      pa->first = gnu_result;
+	    else if (attribute == Attr_Last)
+	      pa->last = gnu_result;
+	    else
+	      pa->length = gnu_result;
+	  }
+	break;
+      }
+
+    case Attr_Bit_Position:
+    case Attr_Position:
+    case Attr_First_Bit:
+    case Attr_Last_Bit:
+    case Attr_Bit:
+      {
+	HOST_WIDE_INT bitsize;
+	HOST_WIDE_INT bitpos;
+	tree gnu_offset;
+	tree gnu_field_bitpos;
+	tree gnu_field_offset;
+	tree gnu_inner;
+	enum machine_mode mode;
+	int unsignedp, volatilep;
+
+	gnu_result_type = get_unpadded_type (Etype (gnat_node));
+	gnu_prefix = remove_conversions (gnu_prefix, true);
+	prefix_unused = true;
+
+	/* We can have 'Bit on any object, but if it isn't a COMPONENT_REF,
+	   the result is 0.  Don't allow 'Bit on a bare component, though. */
+	if (attribute == Attr_Bit
+	    && TREE_CODE (gnu_prefix) != COMPONENT_REF
+	    && TREE_CODE (gnu_prefix) != FIELD_DECL)
+	  {
+	    gnu_result = integer_zero_node;
+	    break;
+	  }
+
+	else
+	  gcc_assert (TREE_CODE (gnu_prefix) == COMPONENT_REF
+		      || (attribute == Attr_Bit_Position
+			  && TREE_CODE (gnu_prefix) == FIELD_DECL));
+
+	get_inner_reference (gnu_prefix, &bitsize, &bitpos, &gnu_offset,
+			     &mode, &unsignedp, &volatilep, false);
+
+	if (TREE_CODE (gnu_prefix) == COMPONENT_REF)
+	  {
+	    gnu_field_bitpos = bit_position (TREE_OPERAND (gnu_prefix, 1));
+	    gnu_field_offset = byte_position (TREE_OPERAND (gnu_prefix, 1));
+
+	    for (gnu_inner = TREE_OPERAND (gnu_prefix, 0);
+		 TREE_CODE (gnu_inner) == COMPONENT_REF
+		 && DECL_INTERNAL_P (TREE_OPERAND (gnu_inner, 1));
+		 gnu_inner = TREE_OPERAND (gnu_inner, 0))
+	      {
+		gnu_field_bitpos
+		  = size_binop (PLUS_EXPR, gnu_field_bitpos,
+				bit_position (TREE_OPERAND (gnu_inner, 1)));
+		gnu_field_offset
+		  = size_binop (PLUS_EXPR, gnu_field_offset,
+				byte_position (TREE_OPERAND (gnu_inner, 1)));
+	      }
+	  }
+	else if (TREE_CODE (gnu_prefix) == FIELD_DECL)
+	  {
+	    gnu_field_bitpos = bit_position (gnu_prefix);
+	    gnu_field_offset = byte_position (gnu_prefix);
+	  }
+	else
+	  {
+	    gnu_field_bitpos = bitsize_zero_node;
+	    gnu_field_offset = size_zero_node;
+	  }
+
+	switch (attribute)
+	  {
+	  case Attr_Position:
+	    gnu_result = gnu_field_offset;
+	    break;
+
+	  case Attr_First_Bit:
+	  case Attr_Bit:
+	    gnu_result = size_int (bitpos % BITS_PER_UNIT);
+	    break;
+
+	  case Attr_Last_Bit:
+	    gnu_result = bitsize_int (bitpos % BITS_PER_UNIT);
+	    gnu_result = size_binop (PLUS_EXPR, gnu_result,
+				     TYPE_SIZE (TREE_TYPE (gnu_prefix)));
+	    gnu_result = size_binop (MINUS_EXPR, gnu_result,
+				     bitsize_one_node);
+	    break;
+
+	  case Attr_Bit_Position:
+	    gnu_result = gnu_field_bitpos;
+	    break;
+		}
+
+	/* If this has a PLACEHOLDER_EXPR, qualify it by the object
+	   we are handling. */
+	gnu_result = SUBSTITUTE_PLACEHOLDER_IN_EXPR (gnu_result, gnu_prefix);
+	break;
+      }
+
+    case Attr_Min:
+    case Attr_Max:
+      {
+	tree gnu_lhs = gnat_to_gnu (First (Expressions (gnat_node)));
+	tree gnu_rhs = gnat_to_gnu (Next (First (Expressions (gnat_node))));
+
+	gnu_result_type = get_unpadded_type (Etype (gnat_node));
+	gnu_result = build_binary_op (attribute == Attr_Min
+				      ? MIN_EXPR : MAX_EXPR,
+				      gnu_result_type, gnu_lhs, gnu_rhs);
+      }
+      break;
+
+    case Attr_Passed_By_Reference:
+      gnu_result = size_int (default_pass_by_ref (gnu_type)
+			     || must_pass_by_ref (gnu_type));
+      gnu_result_type = get_unpadded_type (Etype (gnat_node));
+      break;
+
+    case Attr_Component_Size:
+      if (TREE_CODE (gnu_prefix) == COMPONENT_REF
+	  && (TREE_CODE (TREE_TYPE (TREE_OPERAND (gnu_prefix, 0)))
+	      == RECORD_TYPE)
+	  && (TYPE_IS_PADDING_P (TREE_TYPE (TREE_OPERAND (gnu_prefix, 0)))))
+	gnu_prefix = TREE_OPERAND (gnu_prefix, 0);
+
+      gnu_prefix = maybe_implicit_deref (gnu_prefix);
+      gnu_type = TREE_TYPE (gnu_prefix);
+
+      if (TREE_CODE (gnu_type) == UNCONSTRAINED_ARRAY_TYPE)
+	gnu_type = TREE_TYPE (TREE_TYPE (TYPE_FIELDS (TREE_TYPE (gnu_type))));
+
+      while (TREE_CODE (TREE_TYPE (gnu_type)) == ARRAY_TYPE
+	     && TYPE_MULTI_ARRAY_P (TREE_TYPE (gnu_type)))
+	gnu_type = TREE_TYPE (gnu_type);
+
+      gcc_assert (TREE_CODE (gnu_type) == ARRAY_TYPE);
+
+      /* Note this size cannot be self-referential.  */
+      gnu_result = TYPE_SIZE (TREE_TYPE (gnu_type));
+      gnu_result_type = get_unpadded_type (Etype (gnat_node));
+      prefix_unused = true;
+      break;
+
+    case Attr_Null_Parameter:
+      /* This is just a zero cast to the pointer type for
+	 our prefix and dereferenced.  */
+      gnu_result_type = get_unpadded_type (Etype (gnat_node));
+      gnu_result
+	= build_unary_op (INDIRECT_REF, NULL_TREE,
+			  convert (build_pointer_type (gnu_result_type),
+				   integer_zero_node));
+      TREE_PRIVATE (gnu_result) = 1;
+      break;
+
+    case Attr_Mechanism_Code:
+      {
+	int code;
+	Entity_Id gnat_obj = Entity (Prefix (gnat_node));
+
+	prefix_unused = true;
+	gnu_result_type = get_unpadded_type (Etype (gnat_node));
+	if (Present (Expressions (gnat_node)))
+	  {
+	    int i = UI_To_Int (Intval (First (Expressions (gnat_node))));
+
+	    for (gnat_obj = First_Formal (gnat_obj); i > 1;
+		 i--, gnat_obj = Next_Formal (gnat_obj))
+	      ;
+	  }
+
+	code = Mechanism (gnat_obj);
+	if (code == Default)
+	  code = ((present_gnu_tree (gnat_obj)
+		   && (DECL_BY_REF_P (get_gnu_tree (gnat_obj))
+		       || ((TREE_CODE (get_gnu_tree (gnat_obj))
+			    == PARM_DECL)
+			   && (DECL_BY_COMPONENT_PTR_P
+			       (get_gnu_tree (gnat_obj))))))
+		  ? By_Reference : By_Copy);
+	gnu_result = convert (gnu_result_type, size_int (- code));
+      }
+      break;
+
+    default:
+      /* Say we have an unimplemented attribute.  Then set the value to be
+	 returned to be a zero and hope that's something we can convert to the
+	 type of this attribute.  */
+      post_error ("unimplemented attribute", gnat_node);
+      gnu_result_type = get_unpadded_type (Etype (gnat_node));
+      gnu_result = integer_zero_node;
+      break;
+    }
+
+  /* If this is an attribute where the prefix was unused, force a use of it if
+     it has a side-effect.  But don't do it if the prefix is just an entity
+     name.  However, if an access check is needed, we must do it.  See second
+     example in AARM 11.6(5.e). */
+  if (prefix_unused && TREE_SIDE_EFFECTS (gnu_prefix)
+      && !Is_Entity_Name (Prefix (gnat_node)))
+    gnu_result = fold_build2 (COMPOUND_EXPR, TREE_TYPE (gnu_result),
+			      gnu_prefix, gnu_result);
+
+  *gnu_result_type_p = gnu_result_type;
+  return gnu_result;
+}
+
+/* Subroutine of gnat_to_gnu to translate gnat_node, an N_Case_Statement,
+   to a GCC tree, which is returned.  */
+
+static tree
+Case_Statement_to_gnu (Node_Id gnat_node)
+{
+  tree gnu_result;
+  tree gnu_expr;
+  Node_Id gnat_when;
+
+  gnu_expr = gnat_to_gnu (Expression (gnat_node));
+  gnu_expr = convert (get_base_type (TREE_TYPE (gnu_expr)), gnu_expr);
+
+  /*  The range of values in a case statement is determined by the rules in
+      RM 5.4(7-9). In almost all cases, this range is represented by the Etype
+      of the expression. One exception arises in the case of a simple name that
+      is parenthesized. This still has the Etype of the name, but since it is
+      not a name, para 7 does not apply, and we need to go to the base type.
+      This is the only case where parenthesization affects the dynamic
+      semantics (i.e. the range of possible values at runtime that is covered
+      by the others alternative.
+
+      Another exception is if the subtype of the expression is non-static.  In
+      that case, we also have to use the base type.  */
+  if (Paren_Count (Expression (gnat_node)) != 0
+      || !Is_OK_Static_Subtype (Underlying_Type
+				(Etype (Expression (gnat_node)))))
+    gnu_expr = convert (get_base_type (TREE_TYPE (gnu_expr)), gnu_expr);
+
+  /* We build a SWITCH_EXPR that contains the code with interspersed
+     CASE_LABEL_EXPRs for each label.  */
+
+  push_stack (&gnu_switch_label_stack, NULL_TREE, create_artificial_label ());
+  start_stmt_group ();
+  for (gnat_when = First_Non_Pragma (Alternatives (gnat_node));
+       Present (gnat_when);
+       gnat_when = Next_Non_Pragma (gnat_when))
+    {
+      Node_Id gnat_choice;
+      int choices_added = 0;
+
+      /* First compile all the different case choices for the current WHEN
+	 alternative.  */
+      for (gnat_choice = First (Discrete_Choices (gnat_when));
+	   Present (gnat_choice); gnat_choice = Next (gnat_choice))
+	{
+	  tree gnu_low = NULL_TREE, gnu_high = NULL_TREE;
+
+	  switch (Nkind (gnat_choice))
+	    {
+	    case N_Range:
+	      gnu_low = gnat_to_gnu (Low_Bound (gnat_choice));
+	      gnu_high = gnat_to_gnu (High_Bound (gnat_choice));
+	      break;
+
+	    case N_Subtype_Indication:
+	      gnu_low = gnat_to_gnu (Low_Bound (Range_Expression
+						(Constraint (gnat_choice))));
+	      gnu_high = gnat_to_gnu (High_Bound (Range_Expression
+						  (Constraint (gnat_choice))));
+	      break;
+
+	    case N_Identifier:
+	    case N_Expanded_Name:
+	      /* This represents either a subtype range or a static value of
+		 some kind; Ekind says which.  */
+	      if (IN (Ekind (Entity (gnat_choice)), Type_Kind))
+		{
+		  tree gnu_type = get_unpadded_type (Entity (gnat_choice));
+
+		  gnu_low = fold (TYPE_MIN_VALUE (gnu_type));
+		  gnu_high = fold (TYPE_MAX_VALUE (gnu_type));
+		  break;
+		}
+
+	      /* ... fall through ... */
+
+	    case N_Character_Literal:
+	    case N_Integer_Literal:
+	      gnu_low = gnat_to_gnu (gnat_choice);
+	      break;
+
+	    case N_Others_Choice:
+	      break;
+
+	    default:
+	      gcc_unreachable ();
+	    }
+
+	  /* If the case value is a subtype that raises Constraint_Error at
+	     run-time because of a wrong bound, then gnu_low or gnu_high is
+	     not transtaleted into an INTEGER_CST.  In such a case, we need
+	     to ensure that the when statement is not added in the tree,
+	     otherwise it will crash the gimplifier.  */
+	  if ((!gnu_low || TREE_CODE (gnu_low) == INTEGER_CST)
+	      && (!gnu_high || TREE_CODE (gnu_high) == INTEGER_CST))
+	    {
+	      add_stmt_with_node (build3 (CASE_LABEL_EXPR, void_type_node,
+					  gnu_low, gnu_high,
+					  create_artificial_label ()),
+				  gnat_choice);
+	      choices_added++;
+	    }
+	}
+
+      /* Push a binding level here in case variables are declared as we want
+	 them to be local to this set of statements instead of to the block
+	 containing the Case statement.  */
+      if (choices_added > 0)
+	{
+	  add_stmt (build_stmt_group (Statements (gnat_when), true));
+	  add_stmt (build1 (GOTO_EXPR, void_type_node,
+			    TREE_VALUE (gnu_switch_label_stack)));
+	}
+    }
+
+  /* Now emit a definition of the label all the cases branched to. */
+  add_stmt (build1 (LABEL_EXPR, void_type_node,
+		    TREE_VALUE (gnu_switch_label_stack)));
+  gnu_result = build3 (SWITCH_EXPR, TREE_TYPE (gnu_expr), gnu_expr,
+		       end_stmt_group (), NULL_TREE);
+  pop_stack (&gnu_switch_label_stack);
+
+  return gnu_result;
+}
+
+/* Subroutine of gnat_to_gnu to translate gnat_node, an N_Loop_Statement,
+   to a GCC tree, which is returned.  */
+
+static tree
+Loop_Statement_to_gnu (Node_Id gnat_node)
+{
+  /* ??? It would be nice to use "build" here, but there's no build5.  */
+  tree gnu_loop_stmt = build_nt (LOOP_STMT, NULL_TREE, NULL_TREE,
+				 NULL_TREE, NULL_TREE, NULL_TREE);
+  tree gnu_loop_var = NULL_TREE;
+  Node_Id gnat_iter_scheme = Iteration_Scheme (gnat_node);
+  tree gnu_cond_expr = NULL_TREE;
+  tree gnu_result;
+
+  TREE_TYPE (gnu_loop_stmt) = void_type_node;
+  TREE_SIDE_EFFECTS (gnu_loop_stmt) = 1;
+  LOOP_STMT_LABEL (gnu_loop_stmt) = create_artificial_label ();
+  set_expr_location_from_node (gnu_loop_stmt, gnat_node);
+  Sloc_to_locus (Sloc (End_Label (gnat_node)),
+		 &DECL_SOURCE_LOCATION (LOOP_STMT_LABEL (gnu_loop_stmt)));
+
+  /* Save the end label of this LOOP_STMT in a stack so that the corresponding
+     N_Exit_Statement can find it.  */
+  push_stack (&gnu_loop_label_stack, NULL_TREE,
+	      LOOP_STMT_LABEL (gnu_loop_stmt));
+
+  /* Set the condition that under which the loop should continue.
+     For "LOOP .... END LOOP;" the condition is always true.  */
+  if (No (gnat_iter_scheme))
+    ;
+  /* The case "WHILE condition LOOP ..... END LOOP;" */
+  else if (Present (Condition (gnat_iter_scheme)))
+    LOOP_STMT_TOP_COND (gnu_loop_stmt)
+      = gnat_to_gnu (Condition (gnat_iter_scheme));
+  else
+    {
+      /* We have an iteration scheme.  */
+      Node_Id gnat_loop_spec = Loop_Parameter_Specification (gnat_iter_scheme);
+      Entity_Id gnat_loop_var = Defining_Entity (gnat_loop_spec);
+      Entity_Id gnat_type = Etype (gnat_loop_var);
+      tree gnu_type = get_unpadded_type (gnat_type);
+      tree gnu_low = TYPE_MIN_VALUE (gnu_type);
+      tree gnu_high = TYPE_MAX_VALUE (gnu_type);
+      bool reversep = Reverse_Present (gnat_loop_spec);
+      tree gnu_first = reversep ? gnu_high : gnu_low;
+      tree gnu_last = reversep ? gnu_low : gnu_high;
+      enum tree_code end_code = reversep ? GE_EXPR : LE_EXPR;
+      tree gnu_base_type = get_base_type (gnu_type);
+      tree gnu_limit = (reversep ? TYPE_MIN_VALUE (gnu_base_type)
+			: TYPE_MAX_VALUE (gnu_base_type));
+
+      /* We know the loop variable will not overflow if GNU_LAST is a constant
+	 and is not equal to GNU_LIMIT.  If it might overflow, we have to move
+	 the limit test to the end of the loop.  In that case, we have to test
+	 for an empty loop outside the loop.  */
+      if (TREE_CODE (gnu_last) != INTEGER_CST
+	  || TREE_CODE (gnu_limit) != INTEGER_CST
+	  || tree_int_cst_equal (gnu_last, gnu_limit))
+	{
+	  gnu_cond_expr
+	    = build3 (COND_EXPR, void_type_node,
+		      build_binary_op (LE_EXPR, integer_type_node,
+				       gnu_low, gnu_high),
+		      NULL_TREE, alloc_stmt_list ());
+	  set_expr_location_from_node (gnu_cond_expr, gnat_loop_spec);
+	}
+
+      /* Open a new nesting level that will surround the loop to declare the
+	 loop index variable.  */
+      start_stmt_group ();
+      gnat_pushlevel ();
+
+      /* Declare the loop index and set it to its initial value.  */
+      gnu_loop_var = gnat_to_gnu_entity (gnat_loop_var, gnu_first, 1);
+      if (DECL_BY_REF_P (gnu_loop_var))
+	gnu_loop_var = build_unary_op (INDIRECT_REF, NULL_TREE, gnu_loop_var);
+
+      /* The loop variable might be a padded type, so use `convert' to get a
+	 reference to the inner variable if so.  */
+      gnu_loop_var = convert (get_base_type (gnu_type), gnu_loop_var);
+
+      /* Set either the top or bottom exit condition as appropriate depending
+	 on whether or not we know an overflow cannot occur. */
+      if (gnu_cond_expr)
+	LOOP_STMT_BOT_COND (gnu_loop_stmt)
+	  = build_binary_op (NE_EXPR, integer_type_node,
+			     gnu_loop_var, gnu_last);
+      else
+	LOOP_STMT_TOP_COND (gnu_loop_stmt)
+	  = build_binary_op (end_code, integer_type_node,
+			     gnu_loop_var, gnu_last);
+
+      LOOP_STMT_UPDATE (gnu_loop_stmt)
+	= build_binary_op (reversep ? PREDECREMENT_EXPR
+			   : PREINCREMENT_EXPR,
+			   TREE_TYPE (gnu_loop_var),
+			   gnu_loop_var,
+			   convert (TREE_TYPE (gnu_loop_var),
+				    integer_one_node));
+      set_expr_location_from_node (LOOP_STMT_UPDATE (gnu_loop_stmt),
+			  gnat_iter_scheme);
+    }
+
+  /* If the loop was named, have the name point to this loop.  In this case,
+     the association is not a ..._DECL node, but the end label from this
+     LOOP_STMT. */
+  if (Present (Identifier (gnat_node)))
+    save_gnu_tree (Entity (Identifier (gnat_node)),
+		   LOOP_STMT_LABEL (gnu_loop_stmt), true);
+
+  /* Make the loop body into its own block, so any allocated storage will be
+     released every iteration.  This is needed for stack allocation.  */
+  LOOP_STMT_BODY (gnu_loop_stmt)
+    = build_stmt_group (Statements (gnat_node), true);
+
+  /* If we declared a variable, then we are in a statement group for that
+     declaration.  Add the LOOP_STMT to it and make that the "loop".  */
+  if (gnu_loop_var)
+    {
+      add_stmt (gnu_loop_stmt);
+      gnat_poplevel ();
+      gnu_loop_stmt = end_stmt_group ();
+    }
+
+  /* If we have an outer COND_EXPR, that's our result and this loop is its
+     "true" statement.  Otherwise, the result is the LOOP_STMT. */
+  if (gnu_cond_expr)
+    {
+      COND_EXPR_THEN (gnu_cond_expr) = gnu_loop_stmt;
+      gnu_result = gnu_cond_expr;
+      recalculate_side_effects (gnu_cond_expr);
+    }
+  else
+    gnu_result = gnu_loop_stmt;
+
+  pop_stack (&gnu_loop_label_stack);
+
+  return gnu_result;
+}
+
+/* Emit statements to establish __gnat_handle_vms_condition as a VMS condition
+   handler for the current function.  */
+
+/* This is implemented by issuing a call to the appropriate VMS specific
+   builtin.  To avoid having VMS specific sections in the global gigi decls
+   array, we maintain the decls of interest here.  We can't declare them
+   inside the function because we must mark them never to be GC'd, which we
+   can only do at the global level.  */
+
+static GTY(()) tree vms_builtin_establish_handler_decl = NULL_TREE;
+static GTY(()) tree gnat_vms_condition_handler_decl = NULL_TREE;
+
+static void
+establish_gnat_vms_condition_handler (void)
+{
+  tree establish_stmt;
+
+  /* Elaborate the required decls on the first call.  Check on the decl for
+     the gnat condition handler to decide, as this is one we create so we are
+     sure that it will be non null on subsequent calls.  The builtin decl is
+     looked up so remains null on targets where it is not implemented yet.  */
+  if (gnat_vms_condition_handler_decl == NULL_TREE)
+    {
+      vms_builtin_establish_handler_decl
+	= builtin_decl_for
+	  (get_identifier ("__builtin_establish_vms_condition_handler"));
+
+      gnat_vms_condition_handler_decl
+	= create_subprog_decl (get_identifier ("__gnat_handle_vms_condition"),
+			       NULL_TREE,
+			       build_function_type_list (integer_type_node,
+							 ptr_void_type_node,
+							 ptr_void_type_node,
+							 NULL_TREE),
+			       NULL_TREE, 0, 1, 1, 0, Empty);
+    }
+
+  /* Do nothing if the establish builtin is not available, which might happen
+     on targets where the facility is not implemented.  */
+  if (vms_builtin_establish_handler_decl == NULL_TREE)
+    return;
+
+  establish_stmt
+    = build_call_1_expr (vms_builtin_establish_handler_decl,
+			 build_unary_op
+			 (ADDR_EXPR, NULL_TREE,
+			  gnat_vms_condition_handler_decl));
+
+  add_stmt (establish_stmt);
+}
+
+/* Subroutine of gnat_to_gnu to process gnat_node, an N_Subprogram_Body.  We
+   don't return anything.  */
+
+static void
+Subprogram_Body_to_gnu (Node_Id gnat_node)
+{
+  /* Defining identifier of a parameter to the subprogram.  */
+  Entity_Id gnat_param;
+  /* The defining identifier for the subprogram body. Note that if a
+     specification has appeared before for this body, then the identifier
+     occurring in that specification will also be a defining identifier and all
+     the calls to this subprogram will point to that specification.  */
+  Entity_Id gnat_subprog_id
+    = (Present (Corresponding_Spec (gnat_node))
+       ? Corresponding_Spec (gnat_node) : Defining_Entity (gnat_node));
+  /* The FUNCTION_DECL node corresponding to the subprogram spec.   */
+  tree gnu_subprog_decl;
+  /* The FUNCTION_TYPE node corresponding to the subprogram spec.  */
+  tree gnu_subprog_type;
+  tree gnu_cico_list;
+  tree gnu_result;
+  VEC(parm_attr,gc) *cache;
+
+  /* If this is a generic object or if it has been eliminated,
+     ignore it.  */
+  if (Ekind (gnat_subprog_id) == E_Generic_Procedure
+      || Ekind (gnat_subprog_id) == E_Generic_Function
+      || Is_Eliminated (gnat_subprog_id))
+    return;
+
+  /* If this subprogram acts as its own spec, define it.  Otherwise, just get
+     the already-elaborated tree node.  However, if this subprogram had its
+     elaboration deferred, we will already have made a tree node for it.  So
+     treat it as not being defined in that case.  Such a subprogram cannot
+     have an address clause or a freeze node, so this test is safe, though it
+     does disable some otherwise-useful error checking.  */
+  gnu_subprog_decl
+    = gnat_to_gnu_entity (gnat_subprog_id, NULL_TREE,
+			  Acts_As_Spec (gnat_node)
+			  && !present_gnu_tree (gnat_subprog_id));
+
+  gnu_subprog_type = TREE_TYPE (gnu_subprog_decl);
+
+  /* Propagate the debug mode.  */
+  if (!Needs_Debug_Info (gnat_subprog_id))
+    DECL_IGNORED_P (gnu_subprog_decl) = 1;
+
+  /* Set the line number in the decl to correspond to that of the body so that
+     the line number notes are written correctly.  */
+  Sloc_to_locus (Sloc (gnat_node), &DECL_SOURCE_LOCATION (gnu_subprog_decl));
+
+  /* Initialize the information structure for the function.  */
+  allocate_struct_function (gnu_subprog_decl, false);
+  DECL_STRUCT_FUNCTION (gnu_subprog_decl)->language
+    = GGC_CNEW (struct language_function);
+
+  begin_subprog_body (gnu_subprog_decl);
+  gnu_cico_list = TYPE_CI_CO_LIST (gnu_subprog_type);
+
+  /* If there are Out parameters, we need to ensure that the return statement
+     properly copies them out.  We do this by making a new block and converting
+     any inner return into a goto to a label at the end of the block.  */
+  push_stack (&gnu_return_label_stack, NULL_TREE,
+	      gnu_cico_list ? create_artificial_label () : NULL_TREE);
+
+  /* Get a tree corresponding to the code for the subprogram.  */
+  start_stmt_group ();
+  gnat_pushlevel ();
+
+  /* See if there are any parameters for which we don't yet have GCC entities.
+     These must be for Out parameters for which we will be making VAR_DECL
+     nodes here.  Fill them in to TYPE_CI_CO_LIST, which must contain the empty
+     entry as well.  We can match up the entries because TYPE_CI_CO_LIST is in
+     the order of the parameters.  */
+  for (gnat_param = First_Formal_With_Extras (gnat_subprog_id);
+       Present (gnat_param);
+       gnat_param = Next_Formal_With_Extras (gnat_param))
+    if (!present_gnu_tree (gnat_param))
+      {
+	/* Skip any entries that have been already filled in; they must
+	   correspond to In Out parameters.  */
+	for (; gnu_cico_list && TREE_VALUE (gnu_cico_list);
+	     gnu_cico_list = TREE_CHAIN (gnu_cico_list))
+	  ;
+
+	/* Do any needed references for padded types.  */
+	TREE_VALUE (gnu_cico_list)
+	  = convert (TREE_TYPE (TREE_PURPOSE (gnu_cico_list)),
+		     gnat_to_gnu_entity (gnat_param, NULL_TREE, 1));
+      }
+
+  /* On VMS, establish our condition handler to possibly turn a condition into
+     the corresponding exception if the subprogram has a foreign convention or
+     is exported.
+
+     To ensure proper execution of local finalizations on condition instances,
+     we must turn a condition into the corresponding exception even if there
+     is no applicable Ada handler, and need at least one condition handler per
+     possible call chain involving GNAT code.  OTOH, establishing the handler
+     has a cost so we want to minimize the number of subprograms into which
+     this happens.  The foreign or exported condition is expected to satisfy
+     all the constraints.  */
+  if (TARGET_ABI_OPEN_VMS
+      && (Has_Foreign_Convention (gnat_node) || Is_Exported (gnat_node)))
+    establish_gnat_vms_condition_handler ();
+
+  process_decls (Declarations (gnat_node), Empty, Empty, true, true);
+
+  /* Generate the code of the subprogram itself.  A return statement will be
+     present and any Out parameters will be handled there.  */
+  add_stmt (gnat_to_gnu (Handled_Statement_Sequence (gnat_node)));
+  gnat_poplevel ();
+  gnu_result = end_stmt_group ();
+
+  /* If we populated the parameter attributes cache, we need to make sure
+     that the cached expressions are evaluated on all possible paths.  */
+  cache = DECL_STRUCT_FUNCTION (gnu_subprog_decl)->language->parm_attr_cache;
+  if (cache)
+    {
+      struct parm_attr *pa;
+      int i;
+
+      start_stmt_group ();
+
+      for (i = 0; VEC_iterate (parm_attr, cache, i, pa); i++)
+	{
+	  if (pa->first)
+	    add_stmt (pa->first);
+	  if (pa->last)
+	    add_stmt (pa->last);
+	  if (pa->length)
+	    add_stmt (pa->length);
+	}
+
+      add_stmt (gnu_result);
+      gnu_result = end_stmt_group ();
+    }
+
+  /* If we made a special return label, we need to make a block that contains
+     the definition of that label and the copying to the return value.  That
+     block first contains the function, then the label and copy statement.  */
+  if (TREE_VALUE (gnu_return_label_stack))
+    {
+      tree gnu_retval;
+
+      start_stmt_group ();
+      gnat_pushlevel ();
+      add_stmt (gnu_result);
+      add_stmt (build1 (LABEL_EXPR, void_type_node,
+			TREE_VALUE (gnu_return_label_stack)));
+
+      gnu_cico_list = TYPE_CI_CO_LIST (gnu_subprog_type);
+      if (list_length (gnu_cico_list) == 1)
+	gnu_retval = TREE_VALUE (gnu_cico_list);
+      else
+	gnu_retval = gnat_build_constructor (TREE_TYPE (gnu_subprog_type),
+					     gnu_cico_list);
+
+      if (DECL_P (gnu_retval) && DECL_BY_REF_P (gnu_retval))
+	gnu_retval = build_unary_op (INDIRECT_REF, NULL_TREE, gnu_retval);
+
+      add_stmt_with_node
+	(build_return_expr (DECL_RESULT (gnu_subprog_decl), gnu_retval),
+	 gnat_node);
+      gnat_poplevel ();
+      gnu_result = end_stmt_group ();
+    }
+
+  pop_stack (&gnu_return_label_stack);
+
+  /* Set the end location.  */
+  Sloc_to_locus
+    ((Present (End_Label (Handled_Statement_Sequence (gnat_node)))
+      ? Sloc (End_Label (Handled_Statement_Sequence (gnat_node)))
+      : Sloc (gnat_node)),
+     &DECL_STRUCT_FUNCTION (gnu_subprog_decl)->function_end_locus);
+
+  end_subprog_body (gnu_result, false);
+
+  /* Disconnect the trees for parameters that we made variables for from the
+     GNAT entities since these are unusable after we end the function.  */
+  for (gnat_param = First_Formal_With_Extras (gnat_subprog_id);
+       Present (gnat_param);
+       gnat_param = Next_Formal_With_Extras (gnat_param))
+    if (TREE_CODE (get_gnu_tree (gnat_param)) == VAR_DECL)
+      save_gnu_tree (gnat_param, NULL_TREE, false);
+
+  if (DECL_FUNCTION_STUB (gnu_subprog_decl))
+    build_function_stub (gnu_subprog_decl, gnat_subprog_id);
+
+  mark_out_of_scope (Defining_Unit_Name (Specification (gnat_node)));
+}
+
+/* Subroutine of gnat_to_gnu to translate gnat_node, either an N_Function_Call
+   or an N_Procedure_Call_Statement, to a GCC tree, which is returned.
+   GNU_RESULT_TYPE_P is a pointer to where we should place the result type.
+   If GNU_TARGET is non-null, this must be a function call and the result
+   of the call is to be placed into that object.  */
+
+static tree
+call_to_gnu (Node_Id gnat_node, tree *gnu_result_type_p, tree gnu_target)
+{
+  tree gnu_result;
+  /* The GCC node corresponding to the GNAT subprogram name.  This can either
+     be a FUNCTION_DECL node if we are dealing with a standard subprogram call,
+     or an indirect reference expression (an INDIRECT_REF node) pointing to a
+     subprogram.  */
+  tree gnu_subprog_node = gnat_to_gnu (Name (gnat_node));
+  /* The FUNCTION_TYPE node giving the GCC type of the subprogram.  */
+  tree gnu_subprog_type = TREE_TYPE (gnu_subprog_node);
+  tree gnu_subprog_addr = build_unary_op (ADDR_EXPR, NULL_TREE,
+					  gnu_subprog_node);
+  Entity_Id gnat_formal;
+  Node_Id gnat_actual;
+  tree gnu_actual_list = NULL_TREE;
+  tree gnu_name_list = NULL_TREE;
+  tree gnu_before_list = NULL_TREE;
+  tree gnu_after_list = NULL_TREE;
+  tree gnu_subprog_call;
+
+  switch (Nkind (Name (gnat_node)))
+    {
+    case N_Identifier:
+    case N_Operator_Symbol:
+    case N_Expanded_Name:
+    case N_Attribute_Reference:
+      if (Is_Eliminated (Entity (Name (gnat_node))))
+	Eliminate_Error_Msg (gnat_node, Entity (Name (gnat_node)));
+    }
+
+  gcc_assert (TREE_CODE (gnu_subprog_type) == FUNCTION_TYPE);
+
+  /* If we are calling a stubbed function, make this into a raise of
+     Program_Error.  Elaborate all our args first.  */
+  if (TREE_CODE (gnu_subprog_node) == FUNCTION_DECL
+      && DECL_STUBBED_P (gnu_subprog_node))
+    {
+      for (gnat_actual = First_Actual (gnat_node);
+	   Present (gnat_actual);
+	   gnat_actual = Next_Actual (gnat_actual))
+	add_stmt (gnat_to_gnu (gnat_actual));
+
+      {
+	tree call_expr
+	  = build_call_raise (PE_Stubbed_Subprogram_Called, gnat_node,
+			      N_Raise_Program_Error);
+
+	if (Nkind (gnat_node) == N_Function_Call && !gnu_target)
+	  {
+	    *gnu_result_type_p = TREE_TYPE (gnu_subprog_type);
+	    return build1 (NULL_EXPR, *gnu_result_type_p, call_expr);
+	  }
+	else
+	  return call_expr;
+      }
+    }
+
+  /* If we are calling by supplying a pointer to a target, set up that
+     pointer as the first argument.  Use GNU_TARGET if one was passed;
+     otherwise, make a target by building a variable of the maximum size
+     of the type.  */
+  if (TYPE_RETURNS_BY_TARGET_PTR_P (gnu_subprog_type))
+    {
+      tree gnu_real_ret_type
+	= TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (gnu_subprog_type)));
+
+      if (!gnu_target)
+	{
+	  tree gnu_obj_type
+	    = maybe_pad_type (gnu_real_ret_type,
+			      max_size (TYPE_SIZE (gnu_real_ret_type), true),
+			      0, Etype (Name (gnat_node)), "PAD", false,
+			      false, false);
+
+	  /* ??? We may be about to create a static temporary if we happen to
+	     be at the global binding level.  That's a regression from what
+	     the 3.x back-end would generate in the same situation, but we
+	     don't have a mechanism in Gigi for creating automatic variables
+	     in the elaboration routines.  */
+	  gnu_target
+	    = create_var_decl (create_tmp_var_name ("LR"), NULL, gnu_obj_type,
+			       NULL, false, false, false, false, NULL,
+			       gnat_node);
+	}
+
+      gnu_actual_list
+	= tree_cons (NULL_TREE,
+		     build_unary_op (ADDR_EXPR, NULL_TREE,
+				     unchecked_convert (gnu_real_ret_type,
+							gnu_target,
+							false)),
+		     NULL_TREE);
+
+    }
+
+  /* The only way we can be making a call via an access type is if Name is an
+     explicit dereference.  In that case, get the list of formal args from the
+     type the access type is pointing to.  Otherwise, get the formals from
+     entity being called.  */
+  if (Nkind (Name (gnat_node)) == N_Explicit_Dereference)
+    gnat_formal = First_Formal_With_Extras (Etype (Name (gnat_node)));
+  else if (Nkind (Name (gnat_node)) == N_Attribute_Reference)
+    /* Assume here that this must be 'Elab_Body or 'Elab_Spec.  */
+    gnat_formal = 0;
+  else
+    gnat_formal = First_Formal_With_Extras (Entity (Name (gnat_node)));
+
+  /* Create the list of the actual parameters as GCC expects it, namely a chain
+     of TREE_LIST nodes in which the TREE_VALUE field of each node is a
+     parameter-expression and the TREE_PURPOSE field is null.  Skip Out
+     parameters not passed by reference and don't need to be copied in.  */
+  for (gnat_actual = First_Actual (gnat_node);
+       Present (gnat_actual);
+       gnat_formal = Next_Formal_With_Extras (gnat_formal),
+       gnat_actual = Next_Actual (gnat_actual))
+    {
+      tree gnu_formal
+	= (present_gnu_tree (gnat_formal)
+	   ? get_gnu_tree (gnat_formal) : NULL_TREE);
+      tree gnu_formal_type = gnat_to_gnu_type (Etype (gnat_formal));
+      /* We must suppress conversions that can cause the creation of a
+	 temporary in the Out or In Out case because we need the real
+	 object in this case, either to pass its address if it's passed
+	 by reference or as target of the back copy done after the call
+	 if it uses the copy-in copy-out mechanism.  We do it in the In
+	 case too, except for an unchecked conversion because it alone
+	 can cause the actual to be misaligned and the addressability
+	 test is applied to the real object.  */
+      bool suppress_type_conversion
+	= ((Nkind (gnat_actual) == N_Unchecked_Type_Conversion
+	    && Ekind (gnat_formal) != E_In_Parameter)
+	   || (Nkind (gnat_actual) == N_Type_Conversion
+	       && Is_Composite_Type (Underlying_Type (Etype (gnat_formal)))));
+      Node_Id gnat_name = (suppress_type_conversion
+			   ? Expression (gnat_actual) : gnat_actual);
+      tree gnu_name = gnat_to_gnu (gnat_name), gnu_name_type;
+      tree gnu_actual;
+
+      /* If it's possible we may need to use this expression twice, make sure
+	 that any side-effects are handled via SAVE_EXPRs.  Likewise if we need
+	 to force side-effects before the call.
+	 ??? This is more conservative than we need since we don't need to do
+	 this for pass-by-ref with no conversion.  */
+      if (Ekind (gnat_formal) != E_In_Parameter)
+	gnu_name = gnat_stabilize_reference (gnu_name, true);
+
+      /* If we are passing a non-addressable parameter by reference, pass the
+	 address of a copy.  In the Out or In Out case, set up to copy back
+	 out after the call.  */
+      if (gnu_formal
+	  && (DECL_BY_REF_P (gnu_formal)
+	      || (TREE_CODE (gnu_formal) == PARM_DECL
+		  && (DECL_BY_COMPONENT_PTR_P (gnu_formal)
+		      || (DECL_BY_DESCRIPTOR_P (gnu_formal)))))
+	  && (gnu_name_type = gnat_to_gnu_type (Etype (gnat_name)))
+	  && !addressable_p (gnu_name, gnu_name_type))
+	{
+	  tree gnu_copy = gnu_name, gnu_temp;
+
+	  /* If the type is by_reference, a copy is not allowed.  */
+	  if (Is_By_Reference_Type (Etype (gnat_formal)))
+	    post_error
+	      ("misaligned actual cannot be passed by reference", gnat_actual);
+
+	  /* For users of Starlet we issue a warning because the
+	     interface apparently assumes that by-ref parameters
+	     outlive the procedure invocation.  The code still
+	     will not work as intended, but we cannot do much
+	     better since other low-level parts of the back-end
+	     would allocate temporaries at will because of the
+	     misalignment if we did not do so here.  */
+	  else if (Is_Valued_Procedure (Entity (Name (gnat_node))))
+	    {
+	      post_error
+		("?possible violation of implicit assumption", gnat_actual);
+	      post_error_ne
+		("?made by pragma Import_Valued_Procedure on &", gnat_actual,
+		 Entity (Name (gnat_node)));
+	      post_error_ne ("?because of misalignment of &", gnat_actual,
+			     gnat_formal);
+	    }
+
+	  /* Remove any unpadding from the object and reset the copy.  */
+	  if (TREE_CODE (gnu_name) == COMPONENT_REF
+	      && ((TREE_CODE (TREE_TYPE (TREE_OPERAND (gnu_name, 0)))
+		   == RECORD_TYPE)
+		  && (TYPE_IS_PADDING_P
+		      (TREE_TYPE (TREE_OPERAND (gnu_name, 0))))))
+	    gnu_name = gnu_copy = TREE_OPERAND (gnu_name, 0);
+
+	  /* Otherwise convert to the nominal type of the object if it's
+	     a record type.  There are several cases in which we need to
+	     make the temporary using this type instead of the actual type
+	     of the object if they are distinct, because the expectations
+	     of the callee would otherwise not be met:
+	       - if it's a justified modular type,
+	       - if the actual type is a smaller packable version of it.  */
+	  else if (TREE_CODE (gnu_name_type) == RECORD_TYPE
+		   && (TYPE_JUSTIFIED_MODULAR_P (gnu_name_type)
+		       || smaller_packable_type_p (TREE_TYPE (gnu_name),
+						 gnu_name_type)))
+	    gnu_name = convert (gnu_name_type, gnu_name);
+
+	  /* Make a SAVE_EXPR to both properly account for potential side
+	     effects and handle the creation of a temporary copy.  Special
+	     code in gnat_gimplify_expr ensures that the same temporary is
+	     used as the object and copied back after the call if needed.  */
+	  gnu_name = build1 (SAVE_EXPR, TREE_TYPE (gnu_name), gnu_name);
+	  TREE_SIDE_EFFECTS (gnu_name) = 1;
+
+	  /* Set up to move the copy back to the original.  */
+	  if (Ekind (gnat_formal) != E_In_Parameter)
+	    {
+	      gnu_temp = build_binary_op (MODIFY_EXPR, NULL_TREE, gnu_copy,
+					  gnu_name);
+	      set_expr_location_from_node (gnu_temp, gnat_actual);
+	      append_to_statement_list (gnu_temp, &gnu_after_list);
+	    }
+	}
+
+      /* Start from the real object and build the actual.  */
+      gnu_actual = gnu_name;
+
+      /* If this was a procedure call, we may not have removed any padding.
+	 So do it here for the part we will use as an input, if any.  */
+      if (Ekind (gnat_formal) != E_Out_Parameter
+	  && TREE_CODE (TREE_TYPE (gnu_actual)) == RECORD_TYPE
+	  && TYPE_IS_PADDING_P (TREE_TYPE (gnu_actual)))
+	gnu_actual = convert (get_unpadded_type (Etype (gnat_actual)),
+			      gnu_actual);
+
+      /* Do any needed conversions for the actual and make sure that it is
+	 in range of the formal's type.  */
+      if (suppress_type_conversion)
+	{
+	  /* Put back the conversion we suppressed above in the computation
+	     of the real object.  Note that we treat a conversion between
+	     aggregate types as if it is an unchecked conversion here.  */
+	  gnu_actual
+	    = unchecked_convert (gnat_to_gnu_type (Etype (gnat_actual)),
+				 gnu_actual,
+				 (Nkind (gnat_actual)
+				  == N_Unchecked_Type_Conversion)
+				 && No_Truncation (gnat_actual));
+
+	  if (Ekind (gnat_formal) != E_Out_Parameter
+	      && Do_Range_Check (gnat_actual))
+	    gnu_actual = emit_range_check (gnu_actual, Etype (gnat_formal));
+	}
+      else
+	{
+	  if (Ekind (gnat_formal) != E_Out_Parameter
+	      && Do_Range_Check (gnat_actual))
+	    gnu_actual = emit_range_check (gnu_actual, Etype (gnat_formal));
+
+	  /* We may have suppressed a conversion to the Etype of the actual
+	     since the parent is a procedure call.  So put it back here.
+	     ??? We use the reverse order compared to the case above because
+	     of an awkward interaction with the check and actually don't put
+	     back the conversion at all if a check is emitted.  This is also
+	     done for the conversion to the formal's type just below.  */
+	  if (TREE_CODE (gnu_actual) != SAVE_EXPR)
+	    gnu_actual = convert (gnat_to_gnu_type (Etype (gnat_actual)),
+				  gnu_actual);
+	}
+
+      if (TREE_CODE (gnu_actual) != SAVE_EXPR)
+	gnu_actual = convert (gnu_formal_type, gnu_actual);
+
+      /* Unless this is an In parameter, we must remove any justified modular
+	 building from GNU_NAME to get an lvalue.  */
+      if (Ekind (gnat_formal) != E_In_Parameter
+	  && TREE_CODE (gnu_name) == CONSTRUCTOR
+	  && TREE_CODE (TREE_TYPE (gnu_name)) == RECORD_TYPE
+	  && TYPE_JUSTIFIED_MODULAR_P (TREE_TYPE (gnu_name)))
+	gnu_name = convert (TREE_TYPE (TYPE_FIELDS (TREE_TYPE (gnu_name))),
+			    gnu_name);
+
+      /* If we have not saved a GCC object for the formal, it means it is an
+	 Out parameter not passed by reference and that does not need to be
+	 copied in. Otherwise, look at the PARM_DECL to see if it is passed by
+	 reference. */
+      if (gnu_formal
+	  && TREE_CODE (gnu_formal) == PARM_DECL
+	  && DECL_BY_REF_P (gnu_formal))
+	{
+	  if (Ekind (gnat_formal) != E_In_Parameter)
+	    {
+	      /* In Out or Out parameters passed by reference don't use the
+		 copy-in copy-out mechanism so the address of the real object
+		 must be passed to the function.  */
+	      gnu_actual = gnu_name;
+
+	      /* If we have a padded type, be sure we've removed padding.  */
+	      if (TREE_CODE (TREE_TYPE (gnu_actual)) == RECORD_TYPE
+		  && TYPE_IS_PADDING_P (TREE_TYPE (gnu_actual))
+		  && TREE_CODE (gnu_actual) != SAVE_EXPR)
+		gnu_actual = convert (get_unpadded_type (Etype (gnat_actual)),
+				      gnu_actual);
+
+	      /* If we have the constructed subtype of an aliased object
+		 with an unconstrained nominal subtype, the type of the
+		 actual includes the template, although it is formally
+		 constrained.  So we need to convert it back to the real
+		 constructed subtype to retrieve the constrained part
+		 and takes its address.  */
+	      if (TREE_CODE (TREE_TYPE (gnu_actual)) == RECORD_TYPE
+		  && TYPE_CONTAINS_TEMPLATE_P (TREE_TYPE (gnu_actual))
+		  && TREE_CODE (gnu_actual) != SAVE_EXPR
+		  && Is_Constr_Subt_For_UN_Aliased (Etype (gnat_actual))
+		  && Is_Array_Type (Etype (gnat_actual)))
+		gnu_actual = convert (gnat_to_gnu_type (Etype (gnat_actual)),
+				      gnu_actual);
+	    }
+
+	  /* The symmetry of the paths to the type of an entity is broken here
+	     since arguments don't know that they will be passed by ref. */
+	  gnu_formal_type = TREE_TYPE (get_gnu_tree (gnat_formal));
+	  gnu_actual = build_unary_op (ADDR_EXPR, gnu_formal_type, gnu_actual);
+	}
+      else if (gnu_formal
+	       && TREE_CODE (gnu_formal) == PARM_DECL
+	       && DECL_BY_COMPONENT_PTR_P (gnu_formal))
+	{
+	  gnu_formal_type = TREE_TYPE (get_gnu_tree (gnat_formal));
+	  gnu_actual = maybe_implicit_deref (gnu_actual);
+	  gnu_actual = maybe_unconstrained_array (gnu_actual);
+
+	  if (TREE_CODE (gnu_formal_type) == RECORD_TYPE
+	      && TYPE_IS_PADDING_P (gnu_formal_type))
+	    {
+	      gnu_formal_type = TREE_TYPE (TYPE_FIELDS (gnu_formal_type));
+	      gnu_actual = convert (gnu_formal_type, gnu_actual);
+	    }
+
+	  /* Take the address of the object and convert to the proper pointer
+	     type.  We'd like to actually compute the address of the beginning
+	     of the array using an ADDR_EXPR of an ARRAY_REF, but there's a
+	     possibility that the ARRAY_REF might return a constant and we'd be
+	     getting the wrong address.  Neither approach is exactly correct,
+	     but this is the most likely to work in all cases.  */
+	  gnu_actual = convert (gnu_formal_type,
+				build_unary_op (ADDR_EXPR, NULL_TREE,
+						gnu_actual));
+	}
+      else if (gnu_formal
+	       && TREE_CODE (gnu_formal) == PARM_DECL
+	       && DECL_BY_DESCRIPTOR_P (gnu_formal))
+	{
+	  /* If arg is 'Null_Parameter, pass zero descriptor.  */
+	  if ((TREE_CODE (gnu_actual) == INDIRECT_REF
+	       || TREE_CODE (gnu_actual) == UNCONSTRAINED_ARRAY_REF)
+	      && TREE_PRIVATE (gnu_actual))
+	    gnu_actual = convert (DECL_ARG_TYPE (get_gnu_tree (gnat_formal)),
+				  integer_zero_node);
+	  else
+	    gnu_actual = build_unary_op (ADDR_EXPR, NULL_TREE,
+					 fill_vms_descriptor (gnu_actual,
+							      gnat_formal));
+	}
+      else
+	{
+	  tree gnu_actual_size = TYPE_SIZE (TREE_TYPE (gnu_actual));
+
+	  if (Ekind (gnat_formal) != E_In_Parameter)
+	    gnu_name_list = tree_cons (NULL_TREE, gnu_name, gnu_name_list);
+
+	  if (!gnu_formal || TREE_CODE (gnu_formal) != PARM_DECL)
+	    continue;
+
+	  /* If this is 'Null_Parameter, pass a zero even though we are
+	     dereferencing it.  */
+	  else if (TREE_CODE (gnu_actual) == INDIRECT_REF
+		   && TREE_PRIVATE (gnu_actual)
+		   && host_integerp (gnu_actual_size, 1)
+		   && 0 >= compare_tree_int (gnu_actual_size,
+						   BITS_PER_WORD))
+	    gnu_actual
+	      = unchecked_convert (DECL_ARG_TYPE (gnu_formal),
+				   convert (gnat_type_for_size
+					    (tree_low_cst (gnu_actual_size, 1),
+					     1),
+					    integer_zero_node),
+				   false);
+	  else
+	    gnu_actual = convert (DECL_ARG_TYPE (gnu_formal), gnu_actual);
+	}
+
+      gnu_actual_list = tree_cons (NULL_TREE, gnu_actual, gnu_actual_list);
+    }
+
+  gnu_subprog_call = build_call_list (TREE_TYPE (gnu_subprog_type),
+				      gnu_subprog_addr,
+				      nreverse (gnu_actual_list));
+  set_expr_location_from_node (gnu_subprog_call, gnat_node);
+
+  /* If we return by passing a target, the result is the target after the
+     call.  We must not emit the call directly here because this might be
+     evaluated as part of an expression with conditions to control whether
+     the call should be emitted or not.  */
+  if (TYPE_RETURNS_BY_TARGET_PTR_P (gnu_subprog_type))
+    {
+      /* Conceptually, what we need is a COMPOUND_EXPR with the call followed
+	 by the target object converted to the proper type.  Doing so would
+	 potentially be very inefficient, however, as this expression might
+	 end up wrapped into an outer SAVE_EXPR later on, which would incur a
+	 pointless temporary copy of the whole object.
+
+	 What we do instead is build a COMPOUND_EXPR returning the address of
+	 the target, and then dereference.  Wrapping the COMPOUND_EXPR into a
+	 SAVE_EXPR later on then only incurs a pointer copy.  */
+
+      tree gnu_result_type
+	= TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (gnu_subprog_type)));
+
+      /* Build and return
+	 (result_type) *[gnu_subprog_call (&gnu_target, ...), &gnu_target]  */
+
+      tree gnu_target_address
+	= build_unary_op (ADDR_EXPR, NULL_TREE, gnu_target);
+      set_expr_location_from_node (gnu_target_address, gnat_node);
+
+      gnu_result
+	= build2 (COMPOUND_EXPR, TREE_TYPE (gnu_target_address),
+		  gnu_subprog_call, gnu_target_address);
+
+      gnu_result
+	= unchecked_convert (gnu_result_type,
+			     build_unary_op (INDIRECT_REF, NULL_TREE,
+					     gnu_result),
+			     false);
+
+      *gnu_result_type_p = gnu_result_type;
+      return gnu_result;
+    }
+
+  /* If it is a function call, the result is the call expression unless
+     a target is specified, in which case we copy the result into the target
+     and return the assignment statement.  */
+  else if (Nkind (gnat_node) == N_Function_Call)
+    {
+      gnu_result = gnu_subprog_call;
+
+      /* If the function returns an unconstrained array or by reference,
+	 we have to de-dereference the pointer.  */
+      if (TYPE_RETURNS_UNCONSTRAINED_P (gnu_subprog_type)
+	  || TYPE_RETURNS_BY_REF_P (gnu_subprog_type))
+	gnu_result = build_unary_op (INDIRECT_REF, NULL_TREE, gnu_result);
+
+      if (gnu_target)
+	gnu_result = build_binary_op (MODIFY_EXPR, NULL_TREE,
+				      gnu_target, gnu_result);
+      else
+	*gnu_result_type_p = get_unpadded_type (Etype (gnat_node));
+
+      return gnu_result;
+    }
+
+  /* If this is the case where the GNAT tree contains a procedure call
+     but the Ada procedure has copy in copy out parameters, the special
+     parameter passing mechanism must be used.  */
+  else if (TYPE_CI_CO_LIST (gnu_subprog_type) != NULL_TREE)
+    {
+      /* List of FIELD_DECLs associated with the PARM_DECLs of the copy
+	 in copy out parameters.  */
+      tree scalar_return_list = TYPE_CI_CO_LIST (gnu_subprog_type);
+      int length = list_length (scalar_return_list);
+
+      if (length > 1)
+	{
+	  tree gnu_name;
+
+	  gnu_subprog_call = save_expr (gnu_subprog_call);
+	  gnu_name_list = nreverse (gnu_name_list);
+
+	  /* If any of the names had side-effects, ensure they are all
+	     evaluated before the call.  */
+	  for (gnu_name = gnu_name_list; gnu_name;
+	       gnu_name = TREE_CHAIN (gnu_name))
+	    if (TREE_SIDE_EFFECTS (TREE_VALUE (gnu_name)))
+	      append_to_statement_list (TREE_VALUE (gnu_name),
+					&gnu_before_list);
+	}
+
+      if (Nkind (Name (gnat_node)) == N_Explicit_Dereference)
+	gnat_formal = First_Formal_With_Extras (Etype (Name (gnat_node)));
+      else
+	gnat_formal = First_Formal_With_Extras (Entity (Name (gnat_node)));
+
+      for (gnat_actual = First_Actual (gnat_node);
+	   Present (gnat_actual);
+	   gnat_formal = Next_Formal_With_Extras (gnat_formal),
+	   gnat_actual = Next_Actual (gnat_actual))
+	/* If we are dealing with a copy in copy out parameter, we must
+	   retrieve its value from the record returned in the call.  */
+	if (!(present_gnu_tree (gnat_formal)
+	      && TREE_CODE (get_gnu_tree (gnat_formal)) == PARM_DECL
+	      && (DECL_BY_REF_P (get_gnu_tree (gnat_formal))
+		  || (TREE_CODE (get_gnu_tree (gnat_formal)) == PARM_DECL
+		      && ((DECL_BY_COMPONENT_PTR_P (get_gnu_tree (gnat_formal))
+			   || (DECL_BY_DESCRIPTOR_P
+			       (get_gnu_tree (gnat_formal))))))))
+	    && Ekind (gnat_formal) != E_In_Parameter)
+	  {
+	    /* Get the value to assign to this Out or In Out parameter.  It is
+	       either the result of the function if there is only a single such
+	       parameter or the appropriate field from the record returned.  */
+	    tree gnu_result
+	      = length == 1 ? gnu_subprog_call
+		: build_component_ref (gnu_subprog_call, NULL_TREE,
+				       TREE_PURPOSE (scalar_return_list),
+				       false);
+
+	    /* If the actual is a conversion, get the inner expression, which
+	       will be the real destination, and convert the result to the
+	       type of the actual parameter.  */
+	    tree gnu_actual
+	      = maybe_unconstrained_array (TREE_VALUE (gnu_name_list));
+
+	    /* If the result is a padded type, remove the padding.  */
+	    if (TREE_CODE (TREE_TYPE (gnu_result)) == RECORD_TYPE
+		&& TYPE_IS_PADDING_P (TREE_TYPE (gnu_result)))
+	      gnu_result = convert (TREE_TYPE (TYPE_FIELDS
+					       (TREE_TYPE (gnu_result))),
+				    gnu_result);
+
+	    /* If the actual is a type conversion, the real target object is
+	       denoted by the inner Expression and we need to convert the
+	       result to the associated type.
+	       We also need to convert our gnu assignment target to this type
+	       if the corresponding GNU_NAME was constructed from the GNAT
+	       conversion node and not from the inner Expression.  */
+	    if (Nkind (gnat_actual) == N_Type_Conversion)
+	      {
+		gnu_result
+		  = convert_with_check
+		    (Etype (Expression (gnat_actual)), gnu_result,
+		     Do_Overflow_Check (gnat_actual),
+		     Do_Range_Check (Expression (gnat_actual)),
+		     Float_Truncate (gnat_actual));
+
+		if (!Is_Composite_Type (Underlying_Type (Etype (gnat_formal))))
+		  gnu_actual = convert (TREE_TYPE (gnu_result), gnu_actual);
+	      }
+
+	    /* Unchecked conversions as actuals for Out parameters are not
+	       allowed in user code because they are not variables, but do
+	       occur in front-end expansions.  The associated GNU_NAME is
+	       always obtained from the inner expression in such cases.  */
+	    else if (Nkind (gnat_actual) == N_Unchecked_Type_Conversion)
+	      gnu_result = unchecked_convert (TREE_TYPE (gnu_actual),
+					      gnu_result,
+					      No_Truncation (gnat_actual));
+	    else
+	      {
+		if (Do_Range_Check (gnat_actual))
+		  gnu_result = emit_range_check (gnu_result,
+						 Etype (gnat_actual));
+
+		if (!(!TREE_CONSTANT (TYPE_SIZE (TREE_TYPE (gnu_actual)))
+		      && TREE_CONSTANT (TYPE_SIZE (TREE_TYPE (gnu_result)))))
+		  gnu_result = convert (TREE_TYPE (gnu_actual), gnu_result);
+	      }
+
+	    gnu_result = build_binary_op (MODIFY_EXPR, NULL_TREE,
+					  gnu_actual, gnu_result);
+	    set_expr_location_from_node (gnu_result, gnat_actual);
+	    append_to_statement_list (gnu_result, &gnu_before_list);
+	    scalar_return_list = TREE_CHAIN (scalar_return_list);
+	    gnu_name_list = TREE_CHAIN (gnu_name_list);
+	  }
+	}
+  else
+    append_to_statement_list (gnu_subprog_call, &gnu_before_list);
+
+  append_to_statement_list (gnu_after_list, &gnu_before_list);
+  return gnu_before_list;
+}
+
+/* Subroutine of gnat_to_gnu to translate gnat_node, an
+   N_Handled_Sequence_Of_Statements, to a GCC tree, which is returned.  */
+
+static tree
+Handled_Sequence_Of_Statements_to_gnu (Node_Id gnat_node)
+{
+  tree gnu_jmpsave_decl = NULL_TREE;
+  tree gnu_jmpbuf_decl = NULL_TREE;
+  /* If just annotating, ignore all EH and cleanups.  */
+  bool gcc_zcx = (!type_annotate_only
+		  && Present (Exception_Handlers (gnat_node))
+		  && Exception_Mechanism == Back_End_Exceptions);
+  bool setjmp_longjmp
+    = (!type_annotate_only && Present (Exception_Handlers (gnat_node))
+       && Exception_Mechanism == Setjmp_Longjmp);
+  bool at_end = !type_annotate_only && Present (At_End_Proc (gnat_node));
+  bool binding_for_block = (at_end || gcc_zcx || setjmp_longjmp);
+  tree gnu_inner_block; /* The statement(s) for the block itself.  */
+  tree gnu_result;
+  tree gnu_expr;
+  Node_Id gnat_temp;
+
+  /* The GCC exception handling mechanism can handle both ZCX and SJLJ schemes
+     and we have our own SJLJ mechanism.  To call the GCC mechanism, we call
+     add_cleanup, and when we leave the binding, end_stmt_group will create
+     the TRY_FINALLY_EXPR.
+
+     ??? The region level calls down there have been specifically put in place
+     for a ZCX context and currently the order in which things are emitted
+     (region/handlers) is different from the SJLJ case. Instead of putting
+     other calls with different conditions at other places for the SJLJ case,
+     it seems cleaner to reorder things for the SJLJ case and generalize the
+     condition to make it not ZCX specific.
+
+     If there are any exceptions or cleanup processing involved, we need an
+     outer statement group (for Setjmp_Longjmp) and binding level.  */
+  if (binding_for_block)
+    {
+      start_stmt_group ();
+      gnat_pushlevel ();
+    }
+
+  /* If using setjmp_longjmp, make the variables for the setjmp buffer and save
+     area for address of previous buffer.  Do this first since we need to have
+     the setjmp buf known for any decls in this block.  */
+  if (setjmp_longjmp)
+    {
+      gnu_jmpsave_decl = create_var_decl (get_identifier ("JMPBUF_SAVE"),
+					  NULL_TREE, jmpbuf_ptr_type,
+					  build_call_0_expr (get_jmpbuf_decl),
+					  false, false, false, false, NULL,
+					  gnat_node);
+      DECL_ARTIFICIAL (gnu_jmpsave_decl) = 1;
+
+      /* The __builtin_setjmp receivers will immediately reinstall it.  Now
+	 because of the unstructured form of EH used by setjmp_longjmp, there
+	 might be forward edges going to __builtin_setjmp receivers on which
+	 it is uninitialized, although they will never be actually taken.  */
+      TREE_NO_WARNING (gnu_jmpsave_decl) = 1;
+      gnu_jmpbuf_decl = create_var_decl (get_identifier ("JMP_BUF"),
+					 NULL_TREE, jmpbuf_type,
+					 NULL_TREE, false, false, false, false,
+					 NULL, gnat_node);
+      DECL_ARTIFICIAL (gnu_jmpbuf_decl) = 1;
+
+      set_block_jmpbuf_decl (gnu_jmpbuf_decl);
+
+      /* When we exit this block, restore the saved value.  */
+      add_cleanup (build_call_1_expr (set_jmpbuf_decl, gnu_jmpsave_decl),
+		   End_Label (gnat_node));
+    }
+
+  /* If we are to call a function when exiting this block, add a cleanup
+     to the binding level we made above.  Note that add_cleanup is FIFO
+     so we must register this cleanup after the EH cleanup just above.  */
+  if (at_end)
+    add_cleanup (build_call_0_expr (gnat_to_gnu (At_End_Proc (gnat_node))),
+		 End_Label (gnat_node));
+
+  /* Now build the tree for the declarations and statements inside this block.
+     If this is SJLJ, set our jmp_buf as the current buffer.  */
+  start_stmt_group ();
+
+  if (setjmp_longjmp)
+    add_stmt (build_call_1_expr (set_jmpbuf_decl,
+				 build_unary_op (ADDR_EXPR, NULL_TREE,
+						 gnu_jmpbuf_decl)));
+
+  if (Present (First_Real_Statement (gnat_node)))
+    process_decls (Statements (gnat_node), Empty,
+		   First_Real_Statement (gnat_node), true, true);
+
+  /* Generate code for each statement in the block.  */
+  for (gnat_temp = (Present (First_Real_Statement (gnat_node))
+		    ? First_Real_Statement (gnat_node)
+		    : First (Statements (gnat_node)));
+       Present (gnat_temp); gnat_temp = Next (gnat_temp))
+    add_stmt (gnat_to_gnu (gnat_temp));
+  gnu_inner_block = end_stmt_group ();
+
+  /* Now generate code for the two exception models, if either is relevant for
+     this block.  */
+  if (setjmp_longjmp)
+    {
+      tree *gnu_else_ptr = 0;
+      tree gnu_handler;
+
+      /* Make a binding level for the exception handling declarations and code
+	 and set up gnu_except_ptr_stack for the handlers to use.  */
+      start_stmt_group ();
+      gnat_pushlevel ();
+
+      push_stack (&gnu_except_ptr_stack, NULL_TREE,
+		  create_var_decl (get_identifier ("EXCEPT_PTR"),
+				   NULL_TREE,
+				   build_pointer_type (except_type_node),
+				   build_call_0_expr (get_excptr_decl), false,
+				   false, false, false, NULL, gnat_node));
+
+      /* Generate code for each handler. The N_Exception_Handler case does the
+	 real work and returns a COND_EXPR for each handler, which we chain
+	 together here.  */
+      for (gnat_temp = First_Non_Pragma (Exception_Handlers (gnat_node));
+	   Present (gnat_temp); gnat_temp = Next_Non_Pragma (gnat_temp))
+	{
+	  gnu_expr = gnat_to_gnu (gnat_temp);
+
+	  /* If this is the first one, set it as the outer one. Otherwise,
+	     point the "else" part of the previous handler to us. Then point
+	     to our "else" part.  */
+	  if (!gnu_else_ptr)
+	    add_stmt (gnu_expr);
+	  else
+	    *gnu_else_ptr = gnu_expr;
+
+	  gnu_else_ptr = &COND_EXPR_ELSE (gnu_expr);
+	}
+
+      /* If none of the exception handlers did anything, re-raise but do not
+	 defer abortion.  */
+      gnu_expr = build_call_1_expr (raise_nodefer_decl,
+				    TREE_VALUE (gnu_except_ptr_stack));
+      set_expr_location_from_node (gnu_expr, gnat_node);
+
+      if (gnu_else_ptr)
+	*gnu_else_ptr = gnu_expr;
+      else
+	add_stmt (gnu_expr);
+
+      /* End the binding level dedicated to the exception handlers and get the
+	 whole statement group.  */
+      pop_stack (&gnu_except_ptr_stack);
+      gnat_poplevel ();
+      gnu_handler = end_stmt_group ();
+
+      /* If the setjmp returns 1, we restore our incoming longjmp value and
+	 then check the handlers.  */
+      start_stmt_group ();
+      add_stmt_with_node (build_call_1_expr (set_jmpbuf_decl,
+					     gnu_jmpsave_decl),
+			  gnat_node);
+      add_stmt (gnu_handler);
+      gnu_handler = end_stmt_group ();
+
+      /* This block is now "if (setjmp) ... <handlers> else <block>".  */
+      gnu_result = build3 (COND_EXPR, void_type_node,
+			   (build_call_1_expr
+			    (setjmp_decl,
+			     build_unary_op (ADDR_EXPR, NULL_TREE,
+					     gnu_jmpbuf_decl))),
+			   gnu_handler, gnu_inner_block);
+    }
+  else if (gcc_zcx)
+    {
+      tree gnu_handlers;
+
+      /* First make a block containing the handlers.  */
+      start_stmt_group ();
+      for (gnat_temp = First_Non_Pragma (Exception_Handlers (gnat_node));
+	   Present (gnat_temp);
+	   gnat_temp = Next_Non_Pragma (gnat_temp))
+	add_stmt (gnat_to_gnu (gnat_temp));
+      gnu_handlers = end_stmt_group ();
+
+      /* Now make the TRY_CATCH_EXPR for the block.  */
+      gnu_result = build2 (TRY_CATCH_EXPR, void_type_node,
+			   gnu_inner_block, gnu_handlers);
+    }
+  else
+    gnu_result = gnu_inner_block;
+
+  /* Now close our outer block, if we had to make one.  */
+  if (binding_for_block)
+    {
+      add_stmt (gnu_result);
+      gnat_poplevel ();
+      gnu_result = end_stmt_group ();
+    }
+
+  return gnu_result;
+}
+
+/* Subroutine of gnat_to_gnu to translate gnat_node, an N_Exception_Handler,
+   to a GCC tree, which is returned.  This is the variant for Setjmp_Longjmp
+   exception handling.  */
+
+static tree
+Exception_Handler_to_gnu_sjlj (Node_Id gnat_node)
+{
+  /* Unless this is "Others" or the special "Non-Ada" exception for Ada, make
+     an "if" statement to select the proper exceptions.  For "Others", exclude
+     exceptions where Handled_By_Others is nonzero unless the All_Others flag
+     is set. For "Non-ada", accept an exception if "Lang" is 'V'.  */
+  tree gnu_choice = integer_zero_node;
+  tree gnu_body = build_stmt_group (Statements (gnat_node), false);
+  Node_Id gnat_temp;
+
+  for (gnat_temp = First (Exception_Choices (gnat_node));
+       gnat_temp; gnat_temp = Next (gnat_temp))
+    {
+      tree this_choice;
+
+      if (Nkind (gnat_temp) == N_Others_Choice)
+	{
+	  if (All_Others (gnat_temp))
+	    this_choice = integer_one_node;
+	  else
+	    this_choice
+	      = build_binary_op
+		(EQ_EXPR, integer_type_node,
+		 convert
+		 (integer_type_node,
+		  build_component_ref
+		  (build_unary_op
+		   (INDIRECT_REF, NULL_TREE,
+		    TREE_VALUE (gnu_except_ptr_stack)),
+		   get_identifier ("not_handled_by_others"), NULL_TREE,
+		   false)),
+		 integer_zero_node);
+	}
+
+      else if (Nkind (gnat_temp) == N_Identifier
+	       || Nkind (gnat_temp) == N_Expanded_Name)
+	{
+	  Entity_Id gnat_ex_id = Entity (gnat_temp);
+	  tree gnu_expr;
+
+	  /* Exception may be a renaming. Recover original exception which is
+	     the one elaborated and registered.  */
+	  if (Present (Renamed_Object (gnat_ex_id)))
+	    gnat_ex_id = Renamed_Object (gnat_ex_id);
+
+	  gnu_expr = gnat_to_gnu_entity (gnat_ex_id, NULL_TREE, 0);
+
+	  this_choice
+	    = build_binary_op
+	      (EQ_EXPR, integer_type_node, TREE_VALUE (gnu_except_ptr_stack),
+	       convert (TREE_TYPE (TREE_VALUE (gnu_except_ptr_stack)),
+			build_unary_op (ADDR_EXPR, NULL_TREE, gnu_expr)));
+
+	  /* If this is the distinguished exception "Non_Ada_Error" (and we are
+	     in VMS mode), also allow a non-Ada exception (a VMS condition) t
+	     match.  */
+	  if (Is_Non_Ada_Error (Entity (gnat_temp)))
+	    {
+	      tree gnu_comp
+		= build_component_ref
+		  (build_unary_op (INDIRECT_REF, NULL_TREE,
+				   TREE_VALUE (gnu_except_ptr_stack)),
+		   get_identifier ("lang"), NULL_TREE, false);
+
+	      this_choice
+		= build_binary_op
+		  (TRUTH_ORIF_EXPR, integer_type_node,
+		   build_binary_op (EQ_EXPR, integer_type_node, gnu_comp,
+				    build_int_cst (TREE_TYPE (gnu_comp), 'V')),
+		   this_choice);
+	    }
+	}
+      else
+	gcc_unreachable ();
+
+      gnu_choice = build_binary_op (TRUTH_ORIF_EXPR, integer_type_node,
+				    gnu_choice, this_choice);
+    }
+
+  return build3 (COND_EXPR, void_type_node, gnu_choice, gnu_body, NULL_TREE);
+}
+
+/* Subroutine of gnat_to_gnu to translate gnat_node, an N_Exception_Handler,
+   to a GCC tree, which is returned.  This is the variant for ZCX.  */
+
+static tree
+Exception_Handler_to_gnu_zcx (Node_Id gnat_node)
+{
+  tree gnu_etypes_list = NULL_TREE;
+  tree gnu_expr;
+  tree gnu_etype;
+  tree gnu_current_exc_ptr;
+  tree gnu_incoming_exc_ptr;
+  Node_Id gnat_temp;
+
+  /* We build a TREE_LIST of nodes representing what exception types this
+     handler can catch, with special cases for others and all others cases.
+
+     Each exception type is actually identified by a pointer to the exception
+     id, or to a dummy object for "others" and "all others".
+
+     Care should be taken to ensure that the control flow impact of "others"
+     and "all others" is known to GCC. lang_eh_type_covers is doing the trick
+     currently.  */
+  for (gnat_temp = First (Exception_Choices (gnat_node));
+       gnat_temp; gnat_temp = Next (gnat_temp))
+    {
+      if (Nkind (gnat_temp) == N_Others_Choice)
+	{
+	  tree gnu_expr
+	    = All_Others (gnat_temp) ? all_others_decl : others_decl;
+
+	  gnu_etype
+	    = build_unary_op (ADDR_EXPR, NULL_TREE, gnu_expr);
+	}
+      else if (Nkind (gnat_temp) == N_Identifier
+	       || Nkind (gnat_temp) == N_Expanded_Name)
+	{
+	  Entity_Id gnat_ex_id = Entity (gnat_temp);
+
+	  /* Exception may be a renaming. Recover original exception which is
+	     the one elaborated and registered.  */
+	  if (Present (Renamed_Object (gnat_ex_id)))
+	    gnat_ex_id = Renamed_Object (gnat_ex_id);
+
+	  gnu_expr = gnat_to_gnu_entity (gnat_ex_id, NULL_TREE, 0);
+	  gnu_etype = build_unary_op (ADDR_EXPR, NULL_TREE, gnu_expr);
+
+	  /* The Non_Ada_Error case for VMS exceptions is handled
+	     by the personality routine.  */
+	}
+      else
+	gcc_unreachable ();
+
+      /* The GCC interface expects NULL to be passed for catch all handlers, so
+	 it would be quite tempting to set gnu_etypes_list to NULL if gnu_etype
+	 is integer_zero_node.  It would not work, however, because GCC's
+	 notion of "catch all" is stronger than our notion of "others".  Until
+	 we correctly use the cleanup interface as well, doing that would
+	 prevent the "all others" handlers from being seen, because nothing
+	 can be caught beyond a catch all from GCC's point of view.  */
+      gnu_etypes_list = tree_cons (NULL_TREE, gnu_etype, gnu_etypes_list);
+    }
+
+  start_stmt_group ();
+  gnat_pushlevel ();
+
+  /* Expand a call to the begin_handler hook at the beginning of the handler,
+     and arrange for a call to the end_handler hook to occur on every possible
+     exit path.
+
+     The hooks expect a pointer to the low level occurrence. This is required
+     for our stack management scheme because a raise inside the handler pushes
+     a new occurrence on top of the stack, which means that this top does not
+     necessarily match the occurrence this handler was dealing with.
+
+     The EXC_PTR_EXPR object references the exception occurrence being
+     propagated. Upon handler entry, this is the exception for which the
+     handler is triggered. This might not be the case upon handler exit,
+     however, as we might have a new occurrence propagated by the handler's
+     body, and the end_handler hook called as a cleanup in this context.
+
+     We use a local variable to retrieve the incoming value at handler entry
+     time, and reuse it to feed the end_handler hook's argument at exit.  */
+  gnu_current_exc_ptr = build0 (EXC_PTR_EXPR, ptr_type_node);
+  gnu_incoming_exc_ptr = create_var_decl (get_identifier ("EXPTR"), NULL_TREE,
+					  ptr_type_node, gnu_current_exc_ptr,
+					  false, false, false, false, NULL,
+					  gnat_node);
+
+  add_stmt_with_node (build_call_1_expr (begin_handler_decl,
+					 gnu_incoming_exc_ptr),
+		      gnat_node);
+  /* ??? We don't seem to have an End_Label at hand to set the location.  */
+  add_cleanup (build_call_1_expr (end_handler_decl, gnu_incoming_exc_ptr),
+	       Empty);
+  add_stmt_list (Statements (gnat_node));
+  gnat_poplevel ();
+
+  return build2 (CATCH_EXPR, void_type_node, gnu_etypes_list,
+		 end_stmt_group ());
+}
+
+/* Subroutine of gnat_to_gnu to generate code for an N_Compilation unit.  */
+
+static void
+Compilation_Unit_to_gnu (Node_Id gnat_node)
+{
+  /* Make the decl for the elaboration procedure.  */
+  bool body_p = (Defining_Entity (Unit (gnat_node)),
+	    Nkind (Unit (gnat_node)) == N_Package_Body
+	    || Nkind (Unit (gnat_node)) == N_Subprogram_Body);
+  Entity_Id gnat_unit_entity = Defining_Entity (Unit (gnat_node));
+  tree gnu_elab_proc_decl
+    = create_subprog_decl
+      (create_concat_name (gnat_unit_entity,
+			   body_p ? "elabb" : "elabs"),
+       NULL_TREE, void_ftype, NULL_TREE, false, true, false, NULL,
+       gnat_unit_entity);
+  struct elab_info *info;
+
+  push_stack (&gnu_elab_proc_stack, NULL_TREE, gnu_elab_proc_decl);
+
+  DECL_ELABORATION_PROC_P (gnu_elab_proc_decl) = 1;
+  allocate_struct_function (gnu_elab_proc_decl, false);
+  Sloc_to_locus (Sloc (gnat_unit_entity), &cfun->function_end_locus);
+  set_cfun (NULL);
+
+  /* For a body, first process the spec if there is one. */
+  if (Nkind (Unit (gnat_node)) == N_Package_Body
+      || (Nkind (Unit (gnat_node)) == N_Subprogram_Body
+	      && !Acts_As_Spec (gnat_node)))
+    {
+      add_stmt (gnat_to_gnu (Library_Unit (gnat_node)));
+      finalize_from_with_types ();
+    }
+
+  process_inlined_subprograms (gnat_node);
+
+  if (type_annotate_only && gnat_node == Cunit (Main_Unit))
+    {
+      elaborate_all_entities (gnat_node);
+
+      if (Nkind (Unit (gnat_node)) == N_Subprogram_Declaration
+	  || Nkind (Unit (gnat_node)) == N_Generic_Package_Declaration
+	  || Nkind (Unit (gnat_node)) == N_Generic_Subprogram_Declaration)
+	return;
+    }
+
+  process_decls (Declarations (Aux_Decls_Node (gnat_node)), Empty, Empty,
+		 true, true);
+  add_stmt (gnat_to_gnu (Unit (gnat_node)));
+
+  /* Process any pragmas and actions following the unit.  */
+  add_stmt_list (Pragmas_After (Aux_Decls_Node (gnat_node)));
+  add_stmt_list (Actions (Aux_Decls_Node (gnat_node)));
+  finalize_from_with_types ();
+
+  /* Save away what we've made so far and record this potential elaboration
+     procedure.  */
+  info = (struct elab_info *) ggc_alloc (sizeof (struct elab_info));
+  set_current_block_context (gnu_elab_proc_decl);
+  gnat_poplevel ();
+  DECL_SAVED_TREE (gnu_elab_proc_decl) = end_stmt_group ();
+  info->next = elab_info_list;
+  info->elab_proc = gnu_elab_proc_decl;
+  info->gnat_node = gnat_node;
+  elab_info_list = info;
+
+  /* Generate elaboration code for this unit, if necessary, and say whether
+     we did or not.  */
+  pop_stack (&gnu_elab_proc_stack);
+
+  /* Invalidate the global renaming pointers.  This is necessary because
+     stabilization of the renamed entities may create SAVE_EXPRs which
+     have been tied to a specific elaboration routine just above.  */
+  invalidate_global_renaming_pointers ();
+}
+
+/* This function is the driver of the GNAT to GCC tree transformation
+   process.  It is the entry point of the tree transformer.  GNAT_NODE is the
+   root of some GNAT tree.  Return the root of the corresponding GCC tree.
+   If this is an expression, return the GCC equivalent of the expression.  If
+   it is a statement, return the statement.  In the case when called for a
+   statement, it may also add statements to the current statement group, in
+   which case anything it returns is to be interpreted as occurring after
+   anything `it already added.  */
+
+tree
+gnat_to_gnu (Node_Id gnat_node)
+{
+  bool went_into_elab_proc = false;
+  tree gnu_result = error_mark_node; /* Default to no value. */
+  tree gnu_result_type = void_type_node;
+  tree gnu_expr;
+  tree gnu_lhs, gnu_rhs;
+  Node_Id gnat_temp;
+
+  /* Save node number for error message and set location information.  */
+  error_gnat_node = gnat_node;
+  Sloc_to_locus (Sloc (gnat_node), &input_location);
+
+  if (type_annotate_only
+      && IN (Nkind (gnat_node), N_Statement_Other_Than_Procedure_Call))
+    return alloc_stmt_list ();
+
+  /* If this node is a non-static subexpression and we are only
+     annotating types, make this into a NULL_EXPR.  */
+  if (type_annotate_only
+      && IN (Nkind (gnat_node), N_Subexpr)
+      && Nkind (gnat_node) != N_Identifier
+      && !Compile_Time_Known_Value (gnat_node))
+    return build1 (NULL_EXPR, get_unpadded_type (Etype (gnat_node)),
+		   build_call_raise (CE_Range_Check_Failed, gnat_node,
+				     N_Raise_Constraint_Error));
+
+  /* If this is a Statement and we are at top level, it must be part of the
+     elaboration procedure, so mark us as being in that procedure and push our
+     context.
+
+     If we are in the elaboration procedure, check if we are violating a
+     No_Elaboration_Code restriction by having a statement there.  */
+  if ((IN (Nkind (gnat_node), N_Statement_Other_Than_Procedure_Call)
+       && Nkind (gnat_node) != N_Null_Statement)
+      || Nkind (gnat_node) == N_Procedure_Call_Statement
+      || Nkind (gnat_node) == N_Label
+      || Nkind (gnat_node) == N_Implicit_Label_Declaration
+      || Nkind (gnat_node) == N_Handled_Sequence_Of_Statements
+      || ((Nkind (gnat_node) == N_Raise_Constraint_Error
+	   || Nkind (gnat_node) == N_Raise_Storage_Error
+	   || Nkind (gnat_node) == N_Raise_Program_Error)
+	  && (Ekind (Etype (gnat_node)) == E_Void)))
+    {
+      if (!current_function_decl)
+	{
+	  current_function_decl = TREE_VALUE (gnu_elab_proc_stack);
+	  start_stmt_group ();
+	  gnat_pushlevel ();
+	  went_into_elab_proc = true;
+	}
+
+      /* Don't check for a possible No_Elaboration_Code restriction violation
+	 on N_Handled_Sequence_Of_Statements, as we want to signal an error on
+	 every nested real statement instead.  This also avoids triggering
+	 spurious errors on dummy (empty) sequences created by the front-end
+	 for package bodies in some cases.  */
+
+      if (current_function_decl == TREE_VALUE (gnu_elab_proc_stack)
+	  && Nkind (gnat_node) != N_Handled_Sequence_Of_Statements)
+	Check_Elaboration_Code_Allowed (gnat_node);
+    }
+
+  switch (Nkind (gnat_node))
+    {
+      /********************************/
+      /* Chapter 2: Lexical Elements: */
+      /********************************/
+
+    case N_Identifier:
+    case N_Expanded_Name:
+    case N_Operator_Symbol:
+    case N_Defining_Identifier:
+      gnu_result = Identifier_to_gnu (gnat_node, &gnu_result_type);
+      break;
+
+    case N_Integer_Literal:
+      {
+	tree gnu_type;
+
+	/* Get the type of the result, looking inside any padding and
+	   justified modular types.  Then get the value in that type.  */
+	gnu_type = gnu_result_type = get_unpadded_type (Etype (gnat_node));
+
+	if (TREE_CODE (gnu_type) == RECORD_TYPE
+	    && TYPE_JUSTIFIED_MODULAR_P (gnu_type))
+	  gnu_type = TREE_TYPE (TYPE_FIELDS (gnu_type));
+
+	gnu_result = UI_To_gnu (Intval (gnat_node), gnu_type);
+
+	/* If the result overflows (meaning it doesn't fit in its base type),
+	   abort.  We would like to check that the value is within the range
+	   of the subtype, but that causes problems with subtypes whose usage
+	   will raise Constraint_Error and with biased representation, so
+	   we don't.  */
+	gcc_assert (!TREE_OVERFLOW (gnu_result));
+      }
+      break;
+
+    case N_Character_Literal:
+      /* If a Entity is present, it means that this was one of the
+	 literals in a user-defined character type.  In that case,
+	 just return the value in the CONST_DECL.  Otherwise, use the
+	 character code.  In that case, the base type should be an
+	 INTEGER_TYPE, but we won't bother checking for that.  */
+      gnu_result_type = get_unpadded_type (Etype (gnat_node));
+      if (Present (Entity (gnat_node)))
+	gnu_result = DECL_INITIAL (get_gnu_tree (Entity (gnat_node)));
+      else
+	gnu_result
+	  = build_int_cst_type
+	      (gnu_result_type, UI_To_CC (Char_Literal_Value (gnat_node)));
+      break;
+
+    case N_Real_Literal:
+      /* If this is of a fixed-point type, the value we want is the
+	 value of the corresponding integer.  */
+      if (IN (Ekind (Underlying_Type (Etype (gnat_node))), Fixed_Point_Kind))
+	{
+	  gnu_result_type = get_unpadded_type (Etype (gnat_node));
+	  gnu_result = UI_To_gnu (Corresponding_Integer_Value (gnat_node),
+				  gnu_result_type);
+	  gcc_assert (!TREE_OVERFLOW (gnu_result));
+	}
+
+      /* We should never see a Vax_Float type literal, since the front end
+         is supposed to transform these using appropriate conversions */
+      else if (Vax_Float (Underlying_Type (Etype (gnat_node))))
+	gcc_unreachable ();
+
+      else
+        {
+	  Ureal ur_realval = Realval (gnat_node);
+
+	  gnu_result_type = get_unpadded_type (Etype (gnat_node));
+
+	  /* If the real value is zero, so is the result.  Otherwise,
+	     convert it to a machine number if it isn't already.  That
+	     forces BASE to 0 or 2 and simplifies the rest of our logic.  */
+	  if (UR_Is_Zero (ur_realval))
+	    gnu_result = convert (gnu_result_type, integer_zero_node);
+	  else
+	    {
+	      if (!Is_Machine_Number (gnat_node))
+		ur_realval
+		  = Machine (Base_Type (Underlying_Type (Etype (gnat_node))),
+			     ur_realval, Round_Even, gnat_node);
+
+	      gnu_result
+		= UI_To_gnu (Numerator (ur_realval), gnu_result_type);
+
+	      /* If we have a base of zero, divide by the denominator.
+		 Otherwise, the base must be 2 and we scale the value, which
+		 we know can fit in the mantissa of the type (hence the use
+		 of that type above).  */
+	      if (No (Rbase (ur_realval)))
+		gnu_result
+		  = build_binary_op (RDIV_EXPR,
+				     get_base_type (gnu_result_type),
+				     gnu_result,
+				     UI_To_gnu (Denominator (ur_realval),
+						gnu_result_type));
+	      else
+		{
+		  REAL_VALUE_TYPE tmp;
+
+		  gcc_assert (Rbase (ur_realval) == 2);
+		  real_ldexp (&tmp, &TREE_REAL_CST (gnu_result),
+			      - UI_To_Int (Denominator (ur_realval)));
+		  gnu_result = build_real (gnu_result_type, tmp);
+		}
+	    }
+
+	  /* Now see if we need to negate the result.  Do it this way to
+	     properly handle -0.  */
+	  if (UR_Is_Negative (Realval (gnat_node)))
+	    gnu_result
+	      = build_unary_op (NEGATE_EXPR, get_base_type (gnu_result_type),
+				gnu_result);
+	}
+
+      break;
+
+    case N_String_Literal:
+      gnu_result_type = get_unpadded_type (Etype (gnat_node));
+      if (TYPE_PRECISION (TREE_TYPE (gnu_result_type)) == HOST_BITS_PER_CHAR)
+	{
+	  String_Id gnat_string = Strval (gnat_node);
+	  int length = String_Length (gnat_string);
+	  int i;
+	  char *string;
+	  if (length >= ALLOCA_THRESHOLD)
+             string = XNEWVEC (char, length + 1); /* in case of large strings */
+          else
+             string = (char *) alloca (length + 1);
+
+	  /* Build the string with the characters in the literal.  Note
+	     that Ada strings are 1-origin.  */
+	  for (i = 0; i < length; i++)
+	    string[i] = Get_String_Char (gnat_string, i + 1);
+
+	  /* Put a null at the end of the string in case it's in a context
+	     where GCC will want to treat it as a C string.  */
+	  string[i] = 0;
+
+	  gnu_result = build_string (length, string);
+
+	  /* Strings in GCC don't normally have types, but we want
+	     this to not be converted to the array type.  */
+	  TREE_TYPE (gnu_result) = gnu_result_type;
+
+	  if (length >= ALLOCA_THRESHOLD) /* free if heap-allocated */
+             free (string);
+	}
+      else
+	{
+	  /* Build a list consisting of each character, then make
+	     the aggregate.  */
+	  String_Id gnat_string = Strval (gnat_node);
+	  int length = String_Length (gnat_string);
+	  int i;
+	  tree gnu_list = NULL_TREE;
+	  tree gnu_idx = TYPE_MIN_VALUE (TYPE_DOMAIN (gnu_result_type));
+
+	  for (i = 0; i < length; i++)
+	    {
+	      gnu_list
+		= tree_cons (gnu_idx,
+			     build_int_cst (TREE_TYPE (gnu_result_type),
+					    Get_String_Char (gnat_string,
+							     i + 1)),
+			     gnu_list);
+
+	      gnu_idx = int_const_binop (PLUS_EXPR, gnu_idx, integer_one_node,
+					 0);
+	    }
+
+	  gnu_result
+	    = gnat_build_constructor (gnu_result_type, nreverse (gnu_list));
+	}
+      break;
+
+    case N_Pragma:
+      gnu_result = Pragma_to_gnu (gnat_node);
+      break;
+
+    /**************************************/
+    /* Chapter 3: Declarations and Types: */
+    /**************************************/
+
+    case N_Subtype_Declaration:
+    case N_Full_Type_Declaration:
+    case N_Incomplete_Type_Declaration:
+    case N_Private_Type_Declaration:
+    case N_Private_Extension_Declaration:
+    case N_Task_Type_Declaration:
+      process_type (Defining_Entity (gnat_node));
+      gnu_result = alloc_stmt_list ();
+      break;
+
+    case N_Object_Declaration:
+    case N_Exception_Declaration:
+      gnat_temp = Defining_Entity (gnat_node);
+      gnu_result = alloc_stmt_list ();
+
+      /* If we are just annotating types and this object has an unconstrained
+	 or task type, don't elaborate it.   */
+      if (type_annotate_only
+	  && (((Is_Array_Type (Etype (gnat_temp))
+		|| Is_Record_Type (Etype (gnat_temp)))
+	       && !Is_Constrained (Etype (gnat_temp)))
+	    || Is_Concurrent_Type (Etype (gnat_temp))))
+	break;
+
+      if (Present (Expression (gnat_node))
+	  && !(Nkind (gnat_node) == N_Object_Declaration
+	       && No_Initialization (gnat_node))
+	  && (!type_annotate_only
+	      || Compile_Time_Known_Value (Expression (gnat_node))))
+	{
+	  gnu_expr = gnat_to_gnu (Expression (gnat_node));
+	  if (Do_Range_Check (Expression (gnat_node)))
+	    gnu_expr = emit_range_check (gnu_expr, Etype (gnat_temp));
+
+	  /* If this object has its elaboration delayed, we must force
+	     evaluation of GNU_EXPR right now and save it for when the object
+	     is frozen.  */
+	  if (Present (Freeze_Node (gnat_temp)))
+	    {
+	      if ((Is_Public (gnat_temp) || global_bindings_p ())
+		  && !TREE_CONSTANT (gnu_expr))
+		gnu_expr
+		  = create_var_decl (create_concat_name (gnat_temp, "init"),
+				     NULL_TREE, TREE_TYPE (gnu_expr),
+				     gnu_expr, false, Is_Public (gnat_temp),
+				     false, false, NULL, gnat_temp);
+	      else
+		gnu_expr = maybe_variable (gnu_expr);
+
+	      save_gnu_tree (gnat_node, gnu_expr, true);
+	    }
+	}
+      else
+	gnu_expr = NULL_TREE;
+
+      if (type_annotate_only && gnu_expr && TREE_CODE (gnu_expr) == ERROR_MARK)
+	gnu_expr = NULL_TREE;
+
+      if (No (Freeze_Node (gnat_temp)))
+	gnat_to_gnu_entity (gnat_temp, gnu_expr, 1);
+      break;
+
+    case N_Object_Renaming_Declaration:
+      gnat_temp = Defining_Entity (gnat_node);
+
+      /* Don't do anything if this renaming is handled by the front end or if
+	 we are just annotating types and this object has a composite or task
+	 type, don't elaborate it.  We return the result in case it has any
+	 SAVE_EXPRs in it that need to be evaluated here.  */
+      if (!Is_Renaming_Of_Object (gnat_temp)
+	  && ! (type_annotate_only
+		&& (Is_Array_Type (Etype (gnat_temp))
+		    || Is_Record_Type (Etype (gnat_temp))
+		    || Is_Concurrent_Type (Etype (gnat_temp)))))
+	gnu_result
+	  = gnat_to_gnu_entity (gnat_temp,
+				gnat_to_gnu (Renamed_Object (gnat_temp)), 1);
+      else
+	gnu_result = alloc_stmt_list ();
+      break;
+
+    case N_Implicit_Label_Declaration:
+      gnat_to_gnu_entity (Defining_Entity (gnat_node), NULL_TREE, 1);
+      gnu_result = alloc_stmt_list ();
+      break;
+
+    case N_Exception_Renaming_Declaration:
+    case N_Number_Declaration:
+    case N_Package_Renaming_Declaration:
+    case N_Subprogram_Renaming_Declaration:
+      /* These are fully handled in the front end.  */
+      gnu_result = alloc_stmt_list ();
+      break;
+
+    /*************************************/
+    /* Chapter 4: Names and Expressions: */
+    /*************************************/
+
+    case N_Explicit_Dereference:
+      gnu_result = gnat_to_gnu (Prefix (gnat_node));
+      gnu_result_type = get_unpadded_type (Etype (gnat_node));
+      gnu_result = build_unary_op (INDIRECT_REF, NULL_TREE, gnu_result);
+      break;
+
+    case N_Indexed_Component:
+      {
+	tree gnu_array_object = gnat_to_gnu (Prefix (gnat_node));
+	tree gnu_type;
+	int ndim;
+	int i;
+	Node_Id *gnat_expr_array;
+
+	gnu_array_object = maybe_implicit_deref (gnu_array_object);
+	gnu_array_object = maybe_unconstrained_array (gnu_array_object);
+
+	/* If we got a padded type, remove it too.  */
+	if (TREE_CODE (TREE_TYPE (gnu_array_object)) == RECORD_TYPE
+	    && TYPE_IS_PADDING_P (TREE_TYPE (gnu_array_object)))
+	  gnu_array_object
+	    = convert (TREE_TYPE (TYPE_FIELDS (TREE_TYPE (gnu_array_object))),
+		       gnu_array_object);
+
+	gnu_result = gnu_array_object;
+
+	/* First compute the number of dimensions of the array, then
+	   fill the expression array, the order depending on whether
+	   this is a Convention_Fortran array or not.  */
+	for (ndim = 1, gnu_type = TREE_TYPE (gnu_array_object);
+	     TREE_CODE (TREE_TYPE (gnu_type)) == ARRAY_TYPE
+	     && TYPE_MULTI_ARRAY_P (TREE_TYPE (gnu_type));
+	     ndim++, gnu_type = TREE_TYPE (gnu_type))
+	  ;
+
+	gnat_expr_array = (Node_Id *) alloca (ndim * sizeof (Node_Id));
+
+	if (TYPE_CONVENTION_FORTRAN_P (TREE_TYPE (gnu_array_object)))
+	  for (i = ndim - 1, gnat_temp = First (Expressions (gnat_node));
+	       i >= 0;
+	       i--, gnat_temp = Next (gnat_temp))
+	    gnat_expr_array[i] = gnat_temp;
+	else
+	  for (i = 0, gnat_temp = First (Expressions (gnat_node));
+	       i < ndim;
+	       i++, gnat_temp = Next (gnat_temp))
+	    gnat_expr_array[i] = gnat_temp;
+
+	for (i = 0, gnu_type = TREE_TYPE (gnu_array_object);
+	     i < ndim; i++, gnu_type = TREE_TYPE (gnu_type))
+	  {
+	    gcc_assert (TREE_CODE (gnu_type) == ARRAY_TYPE);
+	    gnat_temp = gnat_expr_array[i];
+	    gnu_expr = gnat_to_gnu (gnat_temp);
+
+	    if (Do_Range_Check (gnat_temp))
+	      gnu_expr
+		= emit_index_check
+		  (gnu_array_object, gnu_expr,
+		   TYPE_MIN_VALUE (TYPE_INDEX_TYPE (TYPE_DOMAIN (gnu_type))),
+		   TYPE_MAX_VALUE (TYPE_INDEX_TYPE (TYPE_DOMAIN (gnu_type))));
+
+	    gnu_result = build_binary_op (ARRAY_REF, NULL_TREE,
+					  gnu_result, gnu_expr);
+	  }
+      }
+
+      gnu_result_type = get_unpadded_type (Etype (gnat_node));
+      break;
+
+    case N_Slice:
+      {
+	tree gnu_type;
+	Node_Id gnat_range_node = Discrete_Range (gnat_node);
+
+	gnu_result = gnat_to_gnu (Prefix (gnat_node));
+	gnu_result_type = get_unpadded_type (Etype (gnat_node));
+
+	/* Do any implicit dereferences of the prefix and do any needed
+	   range check.  */
+	gnu_result = maybe_implicit_deref (gnu_result);
+	gnu_result = maybe_unconstrained_array (gnu_result);
+	gnu_type = TREE_TYPE (gnu_result);
+	if (Do_Range_Check (gnat_range_node))
+	  {
+	    /* Get the bounds of the slice.  */
+	    tree gnu_index_type
+	      = TYPE_INDEX_TYPE (TYPE_DOMAIN (gnu_result_type));
+	    tree gnu_min_expr = TYPE_MIN_VALUE (gnu_index_type);
+	    tree gnu_max_expr = TYPE_MAX_VALUE (gnu_index_type);
+	    /* Get the permitted bounds.  */
+	    tree gnu_base_index_type
+	      = TYPE_INDEX_TYPE (TYPE_DOMAIN (gnu_type));
+	    tree gnu_base_min_expr = TYPE_MIN_VALUE (gnu_base_index_type);
+	    tree gnu_base_max_expr = TYPE_MAX_VALUE (gnu_base_index_type);
+	    tree gnu_expr_l, gnu_expr_h, gnu_expr_type;
+
+	    /* Check to see that the minimum slice value is in range.  */
+	    gnu_expr_l = emit_index_check (gnu_result,
+					   gnu_min_expr,
+					   gnu_base_min_expr,
+					   gnu_base_max_expr);
+
+	    /* Check to see that the maximum slice value is in range.  */
+	    gnu_expr_h = emit_index_check (gnu_result,
+					   gnu_max_expr,
+					   gnu_base_min_expr,
+					   gnu_base_max_expr);
+
+	    /* Derive a good type to convert everything to.  */
+	    gnu_expr_type = get_base_type (TREE_TYPE (gnu_expr_l));
+
+	    /* Build a compound expression that does the range checks and
+	       returns the low bound.  */
+	    gnu_expr = build_binary_op (COMPOUND_EXPR, gnu_expr_type,
+					convert (gnu_expr_type, gnu_expr_h),
+					convert (gnu_expr_type, gnu_expr_l));
+
+	   /* Build a conditional expression that does the range check and
+	      returns the low bound if the slice is not empty (max >= min),
+	      and returns the naked low bound otherwise (max < min), unless
+	      it is non-constant and the high bound is; this prevents VRP
+	      from inferring bogus ranges on the unlikely path.  */
+	    gnu_expr = fold_build3 (COND_EXPR, gnu_expr_type,
+				    build_binary_op (GE_EXPR, gnu_expr_type,
+						     convert (gnu_expr_type,
+							      gnu_max_expr),
+						     convert (gnu_expr_type,
+							      gnu_min_expr)),
+				    gnu_expr,
+				    TREE_CODE (gnu_min_expr) != INTEGER_CST
+				    && TREE_CODE (gnu_max_expr) == INTEGER_CST
+				    ? gnu_max_expr : gnu_min_expr);
+	  }
+	else
+	  /* Simply return the naked low bound.  */
+	  gnu_expr = TYPE_MIN_VALUE (TYPE_DOMAIN (gnu_result_type));
+
+	gnu_result = build_binary_op (ARRAY_RANGE_REF, gnu_result_type,
+				      gnu_result, gnu_expr);
+      }
+      break;
+
+    case N_Selected_Component:
+      {
+	tree gnu_prefix = gnat_to_gnu (Prefix (gnat_node));
+	Entity_Id gnat_field = Entity (Selector_Name (gnat_node));
+	Entity_Id gnat_pref_type = Etype (Prefix (gnat_node));
+	tree gnu_field;
+
+	while (IN (Ekind (gnat_pref_type), Incomplete_Or_Private_Kind)
+	       || IN (Ekind (gnat_pref_type), Access_Kind))
+	  {
+	    if (IN (Ekind (gnat_pref_type), Incomplete_Or_Private_Kind))
+	      gnat_pref_type = Underlying_Type (gnat_pref_type);
+	    else if (IN (Ekind (gnat_pref_type), Access_Kind))
+	      gnat_pref_type = Designated_Type (gnat_pref_type);
+	  }
+
+	gnu_prefix = maybe_implicit_deref (gnu_prefix);
+
+	/* For discriminant references in tagged types always substitute the
+	   corresponding discriminant as the actual selected component. */
+
+	if (Is_Tagged_Type (gnat_pref_type))
+	  while (Present (Corresponding_Discriminant (gnat_field)))
+	    gnat_field = Corresponding_Discriminant (gnat_field);
+
+	/* For discriminant references of untagged types always substitute the
+	   corresponding stored discriminant. */
+
+	else if (Present (Corresponding_Discriminant (gnat_field)))
+	  gnat_field = Original_Record_Component (gnat_field);
+
+	/* Handle extracting the real or imaginary part of a complex.
+	   The real part is the first field and the imaginary the last.  */
+
+	if (TREE_CODE (TREE_TYPE (gnu_prefix)) == COMPLEX_TYPE)
+	  gnu_result = build_unary_op (Present (Next_Entity (gnat_field))
+				       ? REALPART_EXPR : IMAGPART_EXPR,
+				       NULL_TREE, gnu_prefix);
+	else
+	  {
+	    gnu_field = gnat_to_gnu_field_decl (gnat_field);
+
+	    /* If there are discriminants, the prefix might be
+               evaluated more than once, which is a problem if it has
+               side-effects. */
+	    if (Has_Discriminants (Is_Access_Type (Etype (Prefix (gnat_node)))
+				   ? Designated_Type (Etype
+						      (Prefix (gnat_node)))
+				   : Etype (Prefix (gnat_node))))
+	      gnu_prefix = gnat_stabilize_reference (gnu_prefix, false);
+
+	    gnu_result
+	      = build_component_ref (gnu_prefix, NULL_TREE, gnu_field,
+				     (Nkind (Parent (gnat_node))
+				      == N_Attribute_Reference));
+	  }
+
+	gcc_assert (gnu_result);
+	gnu_result_type = get_unpadded_type (Etype (gnat_node));
+      }
+      break;
+
+    case N_Attribute_Reference:
+      {
+        /* The attribute designator (like an enumeration value). */
+        int attribute = Get_Attribute_Id (Attribute_Name (gnat_node));
+
+	/* The Elab_Spec and Elab_Body attributes are special in that
+	   Prefix is a unit, not an object with a GCC equivalent.  Similarly
+	   for Elaborated, since that variable isn't otherwise known.  */
+	if (attribute == Attr_Elab_Body || attribute == Attr_Elab_Spec)
+	  return (create_subprog_decl
+		  (create_concat_name (Entity (Prefix (gnat_node)),
+				       attribute == Attr_Elab_Body
+				       ? "elabb" : "elabs"),
+		   NULL_TREE, void_ftype, NULL_TREE, false, true, true, NULL,
+		   gnat_node));
+
+	gnu_result = Attribute_to_gnu (gnat_node, &gnu_result_type, attribute);
+      }
+      break;
+
+    case N_Reference:
+      /* Like 'Access as far as we are concerned.  */
+      gnu_result = gnat_to_gnu (Prefix (gnat_node));
+      gnu_result = build_unary_op (ADDR_EXPR, NULL_TREE, gnu_result);
+      gnu_result_type = get_unpadded_type (Etype (gnat_node));
+      break;
+
+    case N_Aggregate:
+    case N_Extension_Aggregate:
+      {
+	tree gnu_aggr_type;
+
+	/* ??? It is wrong to evaluate the type now, but there doesn't
+	   seem to be any other practical way of doing it.  */
+
+	gcc_assert (!Expansion_Delayed (gnat_node));
+
+	gnu_aggr_type = gnu_result_type
+	  = get_unpadded_type (Etype (gnat_node));
+
+	if (TREE_CODE (gnu_result_type) == RECORD_TYPE
+	    && TYPE_CONTAINS_TEMPLATE_P (gnu_result_type))
+	  gnu_aggr_type
+	    = TREE_TYPE (TREE_CHAIN (TYPE_FIELDS (gnu_result_type)));
+
+	if (Null_Record_Present (gnat_node))
+	  gnu_result = gnat_build_constructor (gnu_aggr_type, NULL_TREE);
+
+	else if (TREE_CODE (gnu_aggr_type) == RECORD_TYPE
+		 || TREE_CODE (gnu_aggr_type) == UNION_TYPE)
+	  gnu_result
+	    = assoc_to_constructor (Etype (gnat_node),
+				    First (Component_Associations (gnat_node)),
+				    gnu_aggr_type);
+	else if (TREE_CODE (gnu_aggr_type) == ARRAY_TYPE)
+	  gnu_result = pos_to_constructor (First (Expressions (gnat_node)),
+					   gnu_aggr_type,
+					   Component_Type (Etype (gnat_node)));
+	else if (TREE_CODE (gnu_aggr_type) == COMPLEX_TYPE)
+	  gnu_result
+	    = build_binary_op
+	      (COMPLEX_EXPR, gnu_aggr_type,
+	       gnat_to_gnu (Expression (First
+					(Component_Associations (gnat_node)))),
+	       gnat_to_gnu (Expression
+			    (Next
+			     (First (Component_Associations (gnat_node))))));
+	else
+	  gcc_unreachable ();
+
+	gnu_result = convert (gnu_result_type, gnu_result);
+      }
+      break;
+
+    case N_Null:
+      if (TARGET_VTABLE_USES_DESCRIPTORS
+	  && Ekind (Etype (gnat_node)) == E_Access_Subprogram_Type
+	  && Is_Dispatch_Table_Entity (Etype (gnat_node)))
+	gnu_result = null_fdesc_node;
+      else
+	gnu_result = null_pointer_node;
+      gnu_result_type = get_unpadded_type (Etype (gnat_node));
+      break;
+
+    case N_Type_Conversion:
+    case N_Qualified_Expression:
+      /* Get the operand expression.  */
+      gnu_result = gnat_to_gnu (Expression (gnat_node));
+      gnu_result_type = get_unpadded_type (Etype (gnat_node));
+
+      gnu_result
+	= convert_with_check (Etype (gnat_node), gnu_result,
+			      Do_Overflow_Check (gnat_node),
+			      Do_Range_Check (Expression (gnat_node)),
+			      Nkind (gnat_node) == N_Type_Conversion
+			      && Float_Truncate (gnat_node));
+      break;
+
+    case N_Unchecked_Type_Conversion:
+      gnu_result = gnat_to_gnu (Expression (gnat_node));
+      gnu_result_type = get_unpadded_type (Etype (gnat_node));
+
+      /* If the result is a pointer type, see if we are improperly
+	 converting to a stricter alignment.  */
+      if (STRICT_ALIGNMENT && POINTER_TYPE_P (gnu_result_type)
+	  && IN (Ekind (Etype (gnat_node)), Access_Kind))
+	{
+	  unsigned int align = known_alignment (gnu_result);
+	  tree gnu_obj_type = TREE_TYPE (gnu_result_type);
+	  unsigned int oalign = TYPE_ALIGN (gnu_obj_type);
+
+	  if (align != 0 && align < oalign && !TYPE_ALIGN_OK (gnu_obj_type))
+	    post_error_ne_tree_2
+	      ("?source alignment (^) '< alignment of & (^)",
+	       gnat_node, Designated_Type (Etype (gnat_node)),
+	       size_int (align / BITS_PER_UNIT), oalign / BITS_PER_UNIT);
+	}
+
+      /* If we are converting a descriptor to a function pointer, first
+	 build the pointer.  */
+      if (TARGET_VTABLE_USES_DESCRIPTORS
+	  && TREE_TYPE (gnu_result) == fdesc_type_node
+	  && POINTER_TYPE_P (gnu_result_type))
+	gnu_result = build_unary_op (ADDR_EXPR, NULL_TREE, gnu_result);
+
+      gnu_result = unchecked_convert (gnu_result_type, gnu_result,
+				      No_Truncation (gnat_node));
+      break;
+
+    case N_In:
+    case N_Not_In:
+      {
+	tree gnu_object = gnat_to_gnu (Left_Opnd (gnat_node));
+	Node_Id gnat_range = Right_Opnd (gnat_node);
+	tree gnu_low;
+	tree gnu_high;
+
+	/* GNAT_RANGE is either an N_Range node or an identifier
+	   denoting a subtype.  */
+	if (Nkind (gnat_range) == N_Range)
+	  {
+	    gnu_low = gnat_to_gnu (Low_Bound (gnat_range));
+	    gnu_high = gnat_to_gnu (High_Bound (gnat_range));
+	  }
+	else if (Nkind (gnat_range) == N_Identifier
+              || Nkind (gnat_range) == N_Expanded_Name)
+	  {
+	    tree gnu_range_type = get_unpadded_type (Entity (gnat_range));
+
+	    gnu_low = TYPE_MIN_VALUE (gnu_range_type);
+	    gnu_high = TYPE_MAX_VALUE (gnu_range_type);
+	  }
+	else
+	  gcc_unreachable ();
+
+	gnu_result_type = get_unpadded_type (Etype (gnat_node));
+
+	/* If LOW and HIGH are identical, perform an equality test.
+	   Otherwise, ensure that GNU_OBJECT is only evaluated once
+	   and perform a full range test.  */
+	if (operand_equal_p (gnu_low, gnu_high, 0))
+	  gnu_result = build_binary_op (EQ_EXPR, gnu_result_type,
+					gnu_object, gnu_low);
+	else
+	  {
+	    gnu_object = protect_multiple_eval (gnu_object);
+	    gnu_result
+	      = build_binary_op (TRUTH_ANDIF_EXPR, gnu_result_type,
+				 build_binary_op (GE_EXPR, gnu_result_type,
+						  gnu_object, gnu_low),
+				 build_binary_op (LE_EXPR, gnu_result_type,
+						  gnu_object, gnu_high));
+	  }
+
+	if (Nkind (gnat_node) == N_Not_In)
+	  gnu_result = invert_truthvalue (gnu_result);
+      }
+      break;
+
+    case N_Op_Divide:
+      gnu_lhs = gnat_to_gnu (Left_Opnd (gnat_node));
+      gnu_rhs = gnat_to_gnu (Right_Opnd (gnat_node));
+      gnu_result_type = get_unpadded_type (Etype (gnat_node));
+      gnu_result = build_binary_op (FLOAT_TYPE_P (gnu_result_type)
+				    ? RDIV_EXPR
+				    : (Rounded_Result (gnat_node)
+				       ? ROUND_DIV_EXPR : TRUNC_DIV_EXPR),
+				    gnu_result_type, gnu_lhs, gnu_rhs);
+      break;
+
+    case N_Op_Or:    case N_Op_And:      case N_Op_Xor:
+      /* These can either be operations on booleans or on modular types.
+	 Fall through for boolean types since that's the way GNU_CODES is
+	 set up.  */
+      if (IN (Ekind (Underlying_Type (Etype (gnat_node))),
+	      Modular_Integer_Kind))
+	{
+	  enum tree_code code
+	    = (Nkind (gnat_node) == N_Op_Or ? BIT_IOR_EXPR
+	       : Nkind (gnat_node) == N_Op_And ? BIT_AND_EXPR
+	       : BIT_XOR_EXPR);
+
+	  gnu_lhs = gnat_to_gnu (Left_Opnd (gnat_node));
+	  gnu_rhs = gnat_to_gnu (Right_Opnd (gnat_node));
+	  gnu_result_type = get_unpadded_type (Etype (gnat_node));
+	  gnu_result = build_binary_op (code, gnu_result_type,
+					gnu_lhs, gnu_rhs);
+	  break;
+	}
+
+      /* ... fall through ... */
+
+    case N_Op_Eq:    case N_Op_Ne:	 case N_Op_Lt:
+    case N_Op_Le:    case N_Op_Gt:       case N_Op_Ge:
+    case N_Op_Add:   case N_Op_Subtract: case N_Op_Multiply:
+    case N_Op_Mod:   case N_Op_Rem:
+    case N_Op_Rotate_Left:
+    case N_Op_Rotate_Right:
+    case N_Op_Shift_Left:
+    case N_Op_Shift_Right:
+    case N_Op_Shift_Right_Arithmetic:
+    case N_And_Then: case N_Or_Else:
+      {
+	enum tree_code code = gnu_codes[Nkind (gnat_node)];
+	bool ignore_lhs_overflow = false;
+	tree gnu_type;
+
+	gnu_lhs = gnat_to_gnu (Left_Opnd (gnat_node));
+	gnu_rhs = gnat_to_gnu (Right_Opnd (gnat_node));
+	gnu_type = gnu_result_type = get_unpadded_type (Etype (gnat_node));
+
+	/* If this is a comparison operator, convert any references to
+	   an unconstrained array value into a reference to the
+	   actual array.  */
+	if (TREE_CODE_CLASS (code) == tcc_comparison)
+	  {
+	    gnu_lhs = maybe_unconstrained_array (gnu_lhs);
+	    gnu_rhs = maybe_unconstrained_array (gnu_rhs);
+	  }
+
+	/* If the result type is a private type, its full view may be a
+	   numeric subtype. The representation we need is that of its base
+	   type, given that it is the result of an arithmetic operation.  */
+        else if (Is_Private_Type (Etype (gnat_node)))
+	  gnu_type = gnu_result_type
+	    = get_unpadded_type (Base_Type (Full_View (Etype (gnat_node))));
+
+	/* If this is a shift whose count is not guaranteed to be correct,
+	   we need to adjust the shift count.  */
+	if (IN (Nkind (gnat_node), N_Op_Shift)
+	    && !Shift_Count_OK (gnat_node))
+	  {
+	    tree gnu_count_type = get_base_type (TREE_TYPE (gnu_rhs));
+	    tree gnu_max_shift
+	      = convert (gnu_count_type, TYPE_SIZE (gnu_type));
+
+	    if (Nkind (gnat_node) == N_Op_Rotate_Left
+		|| Nkind (gnat_node) == N_Op_Rotate_Right)
+	      gnu_rhs = build_binary_op (TRUNC_MOD_EXPR, gnu_count_type,
+					 gnu_rhs, gnu_max_shift);
+	    else if (Nkind (gnat_node) == N_Op_Shift_Right_Arithmetic)
+	      gnu_rhs
+		= build_binary_op
+		  (MIN_EXPR, gnu_count_type,
+		   build_binary_op (MINUS_EXPR,
+				    gnu_count_type,
+				    gnu_max_shift,
+				    convert (gnu_count_type,
+					     integer_one_node)),
+		   gnu_rhs);
+	  }
+
+	/* For right shifts, the type says what kind of shift to do,
+	   so we may need to choose a different type.  In this case,
+	   we have to ignore integer overflow lest it propagates all
+	   the way down and causes a CE to be explicitly raised.  */
+	if (Nkind (gnat_node) == N_Op_Shift_Right
+	    && !TYPE_UNSIGNED (gnu_type))
+	  {
+	    gnu_type = gnat_unsigned_type (gnu_type);
+	    ignore_lhs_overflow = true;
+	  }
+	else if (Nkind (gnat_node) == N_Op_Shift_Right_Arithmetic
+		 && TYPE_UNSIGNED (gnu_type))
+	  {
+	    gnu_type = gnat_signed_type (gnu_type);
+	    ignore_lhs_overflow = true;
+	  }
+
+	if (gnu_type != gnu_result_type)
+	  {
+	    tree gnu_old_lhs = gnu_lhs;
+	    gnu_lhs = convert (gnu_type, gnu_lhs);
+	    if (TREE_CODE (gnu_lhs) == INTEGER_CST && ignore_lhs_overflow)
+	      TREE_OVERFLOW (gnu_lhs) = TREE_OVERFLOW (gnu_old_lhs);
+	    gnu_rhs = convert (gnu_type, gnu_rhs);
+	  }
+
+	gnu_result = build_binary_op (code, gnu_type, gnu_lhs, gnu_rhs);
+
+	/* If this is a logical shift with the shift count not verified,
+	   we must return zero if it is too large.  We cannot compensate
+	   above in this case.  */
+	if ((Nkind (gnat_node) == N_Op_Shift_Left
+	     || Nkind (gnat_node) == N_Op_Shift_Right)
+	    && !Shift_Count_OK (gnat_node))
+	  gnu_result
+	    = build_cond_expr
+	      (gnu_type,
+	       build_binary_op (GE_EXPR, integer_type_node,
+				gnu_rhs,
+				convert (TREE_TYPE (gnu_rhs),
+					 TYPE_SIZE (gnu_type))),
+	       convert (gnu_type, integer_zero_node),
+	       gnu_result);
+      }
+      break;
+
+    case N_Conditional_Expression:
+      {
+        tree gnu_cond = gnat_to_gnu (First (Expressions (gnat_node)));
+        tree gnu_true = gnat_to_gnu (Next (First (Expressions (gnat_node))));
+        tree gnu_false
+          = gnat_to_gnu (Next (Next (First (Expressions (gnat_node)))));
+
+	gnu_result_type = get_unpadded_type (Etype (gnat_node));
+	gnu_result = build_cond_expr (gnu_result_type,
+				      gnat_truthvalue_conversion (gnu_cond),
+				      gnu_true, gnu_false);
+      }
+      break;
+
+    case N_Op_Plus:
+      gnu_result = gnat_to_gnu (Right_Opnd (gnat_node));
+      gnu_result_type = get_unpadded_type (Etype (gnat_node));
+      break;
+
+    case N_Op_Not:
+      /* This case can apply to a boolean or a modular type.
+	 Fall through for a boolean operand since GNU_CODES is set
+	 up to handle this.  */
+      if (Is_Modular_Integer_Type (Etype (gnat_node))
+	  || (Ekind (Etype (gnat_node)) == E_Private_Type
+	      && Is_Modular_Integer_Type (Full_View (Etype (gnat_node)))))
+	{
+	  gnu_expr = gnat_to_gnu (Right_Opnd (gnat_node));
+	  gnu_result_type = get_unpadded_type (Etype (gnat_node));
+	  gnu_result = build_unary_op (BIT_NOT_EXPR, gnu_result_type,
+				       gnu_expr);
+	  break;
+	}
+
+      /* ... fall through ... */
+
+    case N_Op_Minus:  case N_Op_Abs:
+      gnu_expr = gnat_to_gnu (Right_Opnd (gnat_node));
+
+      if (Ekind (Etype (gnat_node)) != E_Private_Type)
+         gnu_result_type = get_unpadded_type (Etype (gnat_node));
+      else
+         gnu_result_type = get_unpadded_type (Base_Type
+					      (Full_View (Etype (gnat_node))));
+
+      gnu_result = build_unary_op (gnu_codes[Nkind (gnat_node)],
+				   gnu_result_type, gnu_expr);
+      break;
+
+    case N_Allocator:
+      {
+	tree gnu_init = 0;
+	tree gnu_type;
+	bool ignore_init_type = false;
+
+	gnat_temp = Expression (gnat_node);
+
+	/* The Expression operand can either be an N_Identifier or
+	   Expanded_Name, which must represent a type, or a
+	   N_Qualified_Expression, which contains both the object type and an
+	   initial value for the object.  */
+	if (Nkind (gnat_temp) == N_Identifier
+	    || Nkind (gnat_temp) == N_Expanded_Name)
+	  gnu_type = gnat_to_gnu_type (Entity (gnat_temp));
+	else if (Nkind (gnat_temp) == N_Qualified_Expression)
+	  {
+	    Entity_Id gnat_desig_type
+	      = Designated_Type (Underlying_Type (Etype (gnat_node)));
+
+	    ignore_init_type = Has_Constrained_Partial_View (gnat_desig_type);
+	    gnu_init = gnat_to_gnu (Expression (gnat_temp));
+
+	    gnu_init = maybe_unconstrained_array (gnu_init);
+            if (Do_Range_Check (Expression (gnat_temp)))
+              gnu_init = emit_range_check (gnu_init, gnat_desig_type);
+
+	    if (Is_Elementary_Type (gnat_desig_type)
+		|| Is_Constrained (gnat_desig_type))
+	      {
+		gnu_type = gnat_to_gnu_type (gnat_desig_type);
+		gnu_init = convert (gnu_type, gnu_init);
+	      }
+	    else
+	      {
+		gnu_type = gnat_to_gnu_type (Etype (Expression (gnat_temp)));
+		if (TREE_CODE (gnu_type) == UNCONSTRAINED_ARRAY_TYPE)
+		  gnu_type = TREE_TYPE (gnu_init);
+
+		gnu_init = convert (gnu_type, gnu_init);
+	      }
+	  }
+	else
+	  gcc_unreachable ();
+
+	gnu_result_type = get_unpadded_type (Etype (gnat_node));
+	return build_allocator (gnu_type, gnu_init, gnu_result_type,
+				Procedure_To_Call (gnat_node),
+				Storage_Pool (gnat_node), gnat_node,
+				ignore_init_type);
+      }
+      break;
+
+    /***************************/
+    /* Chapter 5: Statements:  */
+    /***************************/
+
+    case N_Label:
+      gnu_result = build1 (LABEL_EXPR, void_type_node,
+			   gnat_to_gnu (Identifier (gnat_node)));
+      break;
+
+    case N_Null_Statement:
+      gnu_result = alloc_stmt_list ();
+      break;
+
+    case N_Assignment_Statement:
+      /* Get the LHS and RHS of the statement and convert any reference to an
+	 unconstrained array into a reference to the underlying array.
+	 If we are not to do range checking and the RHS is an N_Function_Call,
+	 pass the LHS to the call function.  */
+      gnu_lhs = maybe_unconstrained_array (gnat_to_gnu (Name (gnat_node)));
+
+      /* If the type has a size that overflows, convert this into raise of
+	 Storage_Error: execution shouldn't have gotten here anyway.  */
+      if (TREE_CODE (TYPE_SIZE_UNIT (TREE_TYPE (gnu_lhs))) == INTEGER_CST
+	   && TREE_OVERFLOW (TYPE_SIZE_UNIT (TREE_TYPE (gnu_lhs))))
+	gnu_result = build_call_raise (SE_Object_Too_Large, gnat_node,
+				       N_Raise_Storage_Error);
+      else if (Nkind (Expression (gnat_node)) == N_Function_Call
+	       && !Do_Range_Check (Expression (gnat_node)))
+	gnu_result = call_to_gnu (Expression (gnat_node),
+				  &gnu_result_type, gnu_lhs);
+      else
+	{
+	  gnu_rhs
+	    = maybe_unconstrained_array (gnat_to_gnu (Expression (gnat_node)));
+
+	  /* If range check is needed, emit code to generate it */
+	  if (Do_Range_Check (Expression (gnat_node)))
+	    gnu_rhs = emit_range_check (gnu_rhs, Etype (Name (gnat_node)));
+
+	  gnu_result
+	    = build_binary_op (MODIFY_EXPR, NULL_TREE, gnu_lhs, gnu_rhs);
+	}
+      break;
+
+    case N_If_Statement:
+      {
+	tree *gnu_else_ptr;	/* Point to put next "else if" or "else". */
+
+	/* Make the outer COND_EXPR.  Avoid non-determinism.  */
+	gnu_result = build3 (COND_EXPR, void_type_node,
+			     gnat_to_gnu (Condition (gnat_node)),
+			     NULL_TREE, NULL_TREE);
+	COND_EXPR_THEN (gnu_result)
+	  = build_stmt_group (Then_Statements (gnat_node), false);
+	TREE_SIDE_EFFECTS (gnu_result) = 1;
+	gnu_else_ptr = &COND_EXPR_ELSE (gnu_result);
+
+	/* Now make a COND_EXPR for each of the "else if" parts.  Put each
+	   into the previous "else" part and point to where to put any
+	   outer "else".  Also avoid non-determinism.  */
+	if (Present (Elsif_Parts (gnat_node)))
+	  for (gnat_temp = First (Elsif_Parts (gnat_node));
+	       Present (gnat_temp); gnat_temp = Next (gnat_temp))
+	    {
+	      gnu_expr = build3 (COND_EXPR, void_type_node,
+				 gnat_to_gnu (Condition (gnat_temp)),
+				 NULL_TREE, NULL_TREE);
+	      COND_EXPR_THEN (gnu_expr)
+		= build_stmt_group (Then_Statements (gnat_temp), false);
+	      TREE_SIDE_EFFECTS (gnu_expr) = 1;
+	      set_expr_location_from_node (gnu_expr, gnat_temp);
+	      *gnu_else_ptr = gnu_expr;
+	      gnu_else_ptr = &COND_EXPR_ELSE (gnu_expr);
+	    }
+
+	*gnu_else_ptr = build_stmt_group (Else_Statements (gnat_node), false);
+      }
+      break;
+
+    case N_Case_Statement:
+      gnu_result = Case_Statement_to_gnu (gnat_node);
+      break;
+
+    case N_Loop_Statement:
+      gnu_result = Loop_Statement_to_gnu (gnat_node);
+      break;
+
+    case N_Block_Statement:
+      start_stmt_group ();
+      gnat_pushlevel ();
+      process_decls (Declarations (gnat_node), Empty, Empty, true, true);
+      add_stmt (gnat_to_gnu (Handled_Statement_Sequence (gnat_node)));
+      gnat_poplevel ();
+      gnu_result = end_stmt_group ();
+
+      if (Present (Identifier (gnat_node)))
+	mark_out_of_scope (Entity (Identifier (gnat_node)));
+      break;
+
+    case N_Exit_Statement:
+      gnu_result
+	= build2 (EXIT_STMT, void_type_node,
+		  (Present (Condition (gnat_node))
+		   ? gnat_to_gnu (Condition (gnat_node)) : NULL_TREE),
+		  (Present (Name (gnat_node))
+		   ? get_gnu_tree (Entity (Name (gnat_node)))
+		   : TREE_VALUE (gnu_loop_label_stack)));
+      break;
+
+    case N_Return_Statement:
+      {
+	/* The gnu function type of the subprogram currently processed.  */
+	tree gnu_subprog_type = TREE_TYPE (current_function_decl);
+	/* The return value from the subprogram.  */
+	tree gnu_ret_val = NULL_TREE;
+	/* The place to put the return value.  */
+	tree gnu_lhs;
+
+	/* If we are dealing with a "return;" from an Ada procedure with
+	   parameters passed by copy in copy out, we need to return a record
+	   containing the final values of these parameters.  If the list
+	   contains only one entry, return just that entry.
+
+	   For a full description of the copy in copy out parameter mechanism,
+	   see the part of the gnat_to_gnu_entity routine dealing with the
+	   translation of subprograms.
+
+	   But if we have a return label defined, convert this into
+	   a branch to that label.  */
+
+	if (TREE_VALUE (gnu_return_label_stack))
+	  {
+	    gnu_result = build1 (GOTO_EXPR, void_type_node,
+				 TREE_VALUE (gnu_return_label_stack));
+	    break;
+	  }
+
+	else if (TYPE_CI_CO_LIST (gnu_subprog_type))
+	  {
+	    gnu_lhs = DECL_RESULT (current_function_decl);
+	    if (list_length (TYPE_CI_CO_LIST (gnu_subprog_type)) == 1)
+	      gnu_ret_val = TREE_VALUE (TYPE_CI_CO_LIST (gnu_subprog_type));
+	    else
+	      gnu_ret_val
+		= gnat_build_constructor (TREE_TYPE (gnu_subprog_type),
+					  TYPE_CI_CO_LIST (gnu_subprog_type));
+	  }
+
+	/* If the Ada subprogram is a function, we just need to return the
+	   expression.   If the subprogram returns an unconstrained
+	   array, we have to allocate a new version of the result and
+	   return it.  If we return by reference, return a pointer.  */
+
+	else if (Present (Expression (gnat_node)))
+	  {
+	    /* If the current function returns by target pointer and we
+	       are doing a call, pass that target to the call.  */
+	    if (TYPE_RETURNS_BY_TARGET_PTR_P (gnu_subprog_type)
+		&& Nkind (Expression (gnat_node)) == N_Function_Call)
+	      {
+	        gnu_lhs
+		  = build_unary_op (INDIRECT_REF, NULL_TREE,
+				    DECL_ARGUMENTS (current_function_decl));
+		gnu_result = call_to_gnu (Expression (gnat_node),
+					  &gnu_result_type, gnu_lhs);
+	      }
+	    else
+	      {
+		gnu_ret_val = gnat_to_gnu (Expression (gnat_node));
+
+		if (TYPE_RETURNS_BY_TARGET_PTR_P (gnu_subprog_type))
+		  /* The original return type was unconstrained so dereference
+		     the TARGET pointer in the actual return value's type. */
+		  gnu_lhs
+		    = build_unary_op (INDIRECT_REF, TREE_TYPE (gnu_ret_val),
+				      DECL_ARGUMENTS (current_function_decl));
+		else
+		  gnu_lhs = DECL_RESULT (current_function_decl);
+
+		/* Do not remove the padding from GNU_RET_VAL if the inner
+		   type is self-referential since we want to allocate the fixed
+		   size in that case.  */
+		if (TREE_CODE (gnu_ret_val) == COMPONENT_REF
+		    && (TREE_CODE (TREE_TYPE (TREE_OPERAND (gnu_ret_val, 0)))
+			== RECORD_TYPE)
+		    && (TYPE_IS_PADDING_P
+			(TREE_TYPE (TREE_OPERAND (gnu_ret_val, 0))))
+		    && (CONTAINS_PLACEHOLDER_P
+			(TYPE_SIZE (TREE_TYPE (gnu_ret_val)))))
+		  gnu_ret_val = TREE_OPERAND (gnu_ret_val, 0);
+
+		if (TYPE_RETURNS_BY_REF_P (gnu_subprog_type)
+		    || By_Ref (gnat_node))
+		  gnu_ret_val
+		    = build_unary_op (ADDR_EXPR, NULL_TREE, gnu_ret_val);
+
+		else if (TYPE_RETURNS_UNCONSTRAINED_P (gnu_subprog_type))
+		  {
+		    gnu_ret_val = maybe_unconstrained_array (gnu_ret_val);
+		    gnu_ret_val
+		      = build_allocator (TREE_TYPE (gnu_ret_val),
+					 gnu_ret_val,
+					 TREE_TYPE (gnu_subprog_type),
+					 Procedure_To_Call (gnat_node),
+					 Storage_Pool (gnat_node),
+					 gnat_node, false);
+		  }
+	      }
+	  }
+	else
+	  /* If the Ada subprogram is a regular procedure, just return.  */
+	  gnu_lhs = NULL_TREE;
+
+	if (TYPE_RETURNS_BY_TARGET_PTR_P (gnu_subprog_type))
+	  {
+	    if (gnu_ret_val)
+	      gnu_result = build_binary_op (MODIFY_EXPR, NULL_TREE,
+					    gnu_lhs, gnu_ret_val);
+	    add_stmt_with_node (gnu_result, gnat_node);
+	    gnu_lhs = NULL_TREE;
+	  }
+
+	gnu_result = build_return_expr (gnu_lhs, gnu_ret_val);
+      }
+      break;
+
+    case N_Goto_Statement:
+      gnu_result = build1 (GOTO_EXPR, void_type_node,
+			   gnat_to_gnu (Name (gnat_node)));
+      break;
+
+    /****************************/
+    /* Chapter 6: Subprograms:  */
+    /****************************/
+
+    case N_Subprogram_Declaration:
+      /* Unless there is a freeze node, declare the subprogram.  We consider
+	 this a "definition" even though we're not generating code for
+	 the subprogram because we will be making the corresponding GCC
+	 node here. */
+
+      if (No (Freeze_Node (Defining_Entity (Specification (gnat_node)))))
+	gnat_to_gnu_entity (Defining_Entity (Specification (gnat_node)),
+			    NULL_TREE, 1);
+      gnu_result = alloc_stmt_list ();
+      break;
+
+    case N_Abstract_Subprogram_Declaration:
+      /* This subprogram doesn't exist for code generation purposes, but we
+	 have to elaborate the types of any parameters and result, unless
+	 they are imported types (nothing to generate in this case).  */
+
+      /* Process the parameter types first.  */
+
+      for (gnat_temp
+	   = First_Formal_With_Extras
+	      (Defining_Entity (Specification (gnat_node)));
+	   Present (gnat_temp);
+	   gnat_temp = Next_Formal_With_Extras (gnat_temp))
+	if (Is_Itype (Etype (gnat_temp))
+	    && !From_With_Type (Etype (gnat_temp)))
+	  gnat_to_gnu_entity (Etype (gnat_temp), NULL_TREE, 0);
+
+
+      /* Then the result type, set to Standard_Void_Type for procedures.  */
+
+      {
+	Entity_Id gnat_temp_type
+	  = Etype (Defining_Entity (Specification (gnat_node)));
+
+	if (Is_Itype (gnat_temp_type) && !From_With_Type (gnat_temp_type))
+	  gnat_to_gnu_entity (Etype (gnat_temp_type), NULL_TREE, 0);
+      }
+
+      gnu_result = alloc_stmt_list ();
+      break;
+
+    case N_Defining_Program_Unit_Name:
+      /* For a child unit identifier go up a level to get the
+         specification.  We get this when we try to find the spec of
+	 a child unit package that is the compilation unit being compiled. */
+      gnu_result = gnat_to_gnu (Parent (gnat_node));
+      break;
+
+    case N_Subprogram_Body:
+      Subprogram_Body_to_gnu (gnat_node);
+      gnu_result = alloc_stmt_list ();
+      break;
+
+    case N_Function_Call:
+    case N_Procedure_Call_Statement:
+      gnu_result = call_to_gnu (gnat_node, &gnu_result_type, NULL_TREE);
+      break;
+
+    /*************************/
+    /* Chapter 7: Packages:  */
+    /*************************/
+
+    case N_Package_Declaration:
+      gnu_result = gnat_to_gnu (Specification (gnat_node));
+      break;
+
+    case N_Package_Specification:
+
+      start_stmt_group ();
+      process_decls (Visible_Declarations (gnat_node),
+		     Private_Declarations (gnat_node), Empty, true, true);
+      gnu_result = end_stmt_group ();
+      break;
+
+    case N_Package_Body:
+
+      /* If this is the body of a generic package - do nothing */
+      if (Ekind (Corresponding_Spec (gnat_node)) == E_Generic_Package)
+	{
+	  gnu_result = alloc_stmt_list ();
+	  break;
+	}
+
+      start_stmt_group ();
+      process_decls (Declarations (gnat_node), Empty, Empty, true, true);
+
+      if (Present (Handled_Statement_Sequence (gnat_node)))
+	add_stmt (gnat_to_gnu (Handled_Statement_Sequence (gnat_node)));
+
+      gnu_result = end_stmt_group ();
+      break;
+
+    /*********************************/
+    /* Chapter 8: Visibility Rules:  */
+    /*********************************/
+
+    case N_Use_Package_Clause:
+    case N_Use_Type_Clause:
+      /* Nothing to do here - but these may appear in list of declarations */
+      gnu_result = alloc_stmt_list ();
+      break;
+
+    /***********************/
+    /* Chapter 9: Tasks:   */
+    /***********************/
+
+    case N_Protected_Type_Declaration:
+      gnu_result = alloc_stmt_list ();
+      break;
+
+    case N_Single_Task_Declaration:
+      gnat_to_gnu_entity (Defining_Entity (gnat_node), NULL_TREE, 1);
+      gnu_result = alloc_stmt_list ();
+      break;
+
+    /***********************************************************/
+    /* Chapter 10: Program Structure and Compilation Issues:   */
+    /***********************************************************/
+
+    case N_Compilation_Unit:
+
+      /* This is not called for the main unit, which is handled in function
+	 gigi above.  */
+      start_stmt_group ();
+      gnat_pushlevel ();
+
+      Compilation_Unit_to_gnu (gnat_node);
+      gnu_result = alloc_stmt_list ();
+      break;
+
+    case N_Subprogram_Body_Stub:
+    case N_Package_Body_Stub:
+    case N_Protected_Body_Stub:
+    case N_Task_Body_Stub:
+      /* Simply process whatever unit is being inserted.  */
+      gnu_result = gnat_to_gnu (Unit (Library_Unit (gnat_node)));
+      break;
+
+    case N_Subunit:
+      gnu_result = gnat_to_gnu (Proper_Body (gnat_node));
+      break;
+
+    /***************************/
+    /* Chapter 11: Exceptions: */
+    /***************************/
+
+    case N_Handled_Sequence_Of_Statements:
+      /* If there is an At_End procedure attached to this node, and the EH
+	 mechanism is SJLJ, we must have at least a corresponding At_End
+	 handler, unless the No_Exception_Handlers restriction is set.  */
+      gcc_assert (type_annotate_only
+		  || Exception_Mechanism != Setjmp_Longjmp
+		  || No (At_End_Proc (gnat_node))
+		  || Present (Exception_Handlers (gnat_node))
+		  || No_Exception_Handlers_Set ());
+
+      gnu_result = Handled_Sequence_Of_Statements_to_gnu (gnat_node);
+      break;
+
+    case N_Exception_Handler:
+      if (Exception_Mechanism == Setjmp_Longjmp)
+	gnu_result = Exception_Handler_to_gnu_sjlj (gnat_node);
+      else if (Exception_Mechanism == Back_End_Exceptions)
+	gnu_result = Exception_Handler_to_gnu_zcx (gnat_node);
+      else
+	gcc_unreachable ();
+
+      break;
+
+    case N_Push_Constraint_Error_Label:
+      push_exception_label_stack (&gnu_constraint_error_label_stack,
+				  Exception_Label (gnat_node));
+      break;
+
+    case N_Push_Storage_Error_Label:
+      push_exception_label_stack (&gnu_storage_error_label_stack,
+				  Exception_Label (gnat_node));
+      break;
+
+    case N_Push_Program_Error_Label:
+      push_exception_label_stack (&gnu_program_error_label_stack,
+				  Exception_Label (gnat_node));
+      break;
+
+    case N_Pop_Constraint_Error_Label:
+      gnu_constraint_error_label_stack
+	= TREE_CHAIN (gnu_constraint_error_label_stack);
+      break;
+
+    case N_Pop_Storage_Error_Label:
+      gnu_storage_error_label_stack
+	= TREE_CHAIN (gnu_storage_error_label_stack);
+      break;
+
+    case N_Pop_Program_Error_Label:
+      gnu_program_error_label_stack
+	= TREE_CHAIN (gnu_program_error_label_stack);
+      break;
+
+    /*******************************/
+    /* Chapter 12: Generic Units:  */
+    /*******************************/
+
+    case N_Generic_Function_Renaming_Declaration:
+    case N_Generic_Package_Renaming_Declaration:
+    case N_Generic_Procedure_Renaming_Declaration:
+    case N_Generic_Package_Declaration:
+    case N_Generic_Subprogram_Declaration:
+    case N_Package_Instantiation:
+    case N_Procedure_Instantiation:
+    case N_Function_Instantiation:
+      /* These nodes can appear on a declaration list but there is nothing to
+	 to be done with them.  */
+      gnu_result = alloc_stmt_list ();
+      break;
+
+    /***************************************************/
+    /* Chapter 13: Representation Clauses and	       */
+    /*             Implementation-Dependent Features:  */
+    /***************************************************/
+
+    case N_Attribute_Definition_Clause:
+
+      gnu_result = alloc_stmt_list ();
+
+      /* The only one we need deal with is for 'Address.  For the others, SEM
+	 puts the information elsewhere.  We need only deal with 'Address
+	 if the object has a Freeze_Node (which it never will currently).  */
+      if (Get_Attribute_Id (Chars (gnat_node)) != Attr_Address
+	  || No (Freeze_Node (Entity (Name (gnat_node)))))
+	break;
+
+      /* Get the value to use as the address and save it as the
+	 equivalent for GNAT_TEMP.  When the object is frozen,
+	 gnat_to_gnu_entity will do the right thing. */
+      save_gnu_tree (Entity (Name (gnat_node)),
+                     gnat_to_gnu (Expression (gnat_node)), true);
+      break;
+
+    case N_Enumeration_Representation_Clause:
+    case N_Record_Representation_Clause:
+    case N_At_Clause:
+      /* We do nothing with these.  SEM puts the information elsewhere.  */
+      gnu_result = alloc_stmt_list ();
+      break;
+
+    case N_Code_Statement:
+      if (!type_annotate_only)
+	{
+	  tree gnu_template = gnat_to_gnu (Asm_Template (gnat_node));
+	  tree gnu_inputs = NULL_TREE, gnu_outputs = NULL_TREE;
+	  tree gnu_clobbers = NULL_TREE, tail;
+	  bool allows_mem, allows_reg, fake;
+	  int ninputs, noutputs, i;
+	  const char **oconstraints;
+	  const char *constraint;
+	  char *clobber;
+
+	  /* First retrieve the 3 operand lists built by the front-end.  */
+	  Setup_Asm_Outputs (gnat_node);
+	  while (Present (gnat_temp = Asm_Output_Variable ()))
+	    {
+	      tree gnu_value = gnat_to_gnu (gnat_temp);
+	      tree gnu_constr = build_tree_list (NULL_TREE, gnat_to_gnu
+						 (Asm_Output_Constraint ()));
+
+	      gnu_outputs = tree_cons (gnu_constr, gnu_value, gnu_outputs);
+	      Next_Asm_Output ();
+	    }
+
+	  Setup_Asm_Inputs (gnat_node);
+	  while (Present (gnat_temp = Asm_Input_Value ()))
+	    {
+	      tree gnu_value = gnat_to_gnu (gnat_temp);
+	      tree gnu_constr = build_tree_list (NULL_TREE, gnat_to_gnu
+						 (Asm_Input_Constraint ()));
+
+	      gnu_inputs = tree_cons (gnu_constr, gnu_value, gnu_inputs);
+	      Next_Asm_Input ();
+	    }
+
+	  Clobber_Setup (gnat_node);
+	  while ((clobber = Clobber_Get_Next ()))
+	    gnu_clobbers
+	      = tree_cons (NULL_TREE,
+			   build_string (strlen (clobber) + 1, clobber),
+			   gnu_clobbers);
+
+          /* Then perform some standard checking and processing on the
+	     operands.  In particular, mark them addressable if needed.  */
+	  gnu_outputs = nreverse (gnu_outputs);
+	  noutputs = list_length (gnu_outputs);
+	  gnu_inputs = nreverse (gnu_inputs);
+	  ninputs = list_length (gnu_inputs);
+	  oconstraints
+	    = (const char **) alloca (noutputs * sizeof (const char *));
+
+	  for (i = 0, tail = gnu_outputs; tail; ++i, tail = TREE_CHAIN (tail))
+	    {
+	      tree output = TREE_VALUE (tail);
+	      constraint
+		= TREE_STRING_POINTER (TREE_VALUE (TREE_PURPOSE (tail)));
+	      oconstraints[i] = constraint;
+
+	      if (parse_output_constraint (&constraint, i, ninputs, noutputs,
+					   &allows_mem, &allows_reg, &fake))
+		{
+		  /* If the operand is going to end up in memory,
+		     mark it addressable.  Note that we don't test
+		     allows_mem like in the input case below; this
+		     is modelled on the C front-end.  */
+		  if (!allows_reg
+		      && !gnat_mark_addressable (output))
+		    output = error_mark_node;
+		}
+	      else
+		output = error_mark_node;
+
+	      TREE_VALUE (tail) = output;
+	    }
+
+	  for (i = 0, tail = gnu_inputs; tail; ++i, tail = TREE_CHAIN (tail))
+	    {
+	      tree input = TREE_VALUE (tail);
+	      constraint
+		= TREE_STRING_POINTER (TREE_VALUE (TREE_PURPOSE (tail)));
+
+	      if (parse_input_constraint (&constraint, i, ninputs, noutputs,
+					  0, oconstraints,
+					  &allows_mem, &allows_reg))
+		{
+		  /* If the operand is going to end up in memory,
+		     mark it addressable.  */
+		  if (!allows_reg && allows_mem
+		      && !gnat_mark_addressable (input))
+		    input = error_mark_node;
+		}
+	      else
+		input = error_mark_node;
+
+	      TREE_VALUE (tail) = input;
+	    }
+
+	  gnu_result = build4 (ASM_EXPR,  void_type_node,
+			       gnu_template, gnu_outputs,
+			       gnu_inputs, gnu_clobbers);
+	  ASM_VOLATILE_P (gnu_result) = Is_Asm_Volatile (gnat_node);
+	}
+      else
+	gnu_result = alloc_stmt_list ();
+
+      break;
+
+    /***************************************************/
+    /* Added Nodes	                               */
+    /***************************************************/
+
+    case N_Freeze_Entity:
+      start_stmt_group ();
+      process_freeze_entity (gnat_node);
+      process_decls (Actions (gnat_node), Empty, Empty, true, true);
+      gnu_result = end_stmt_group ();
+      break;
+
+    case N_Itype_Reference:
+      if (!present_gnu_tree (Itype (gnat_node)))
+	process_type (Itype (gnat_node));
+
+      gnu_result = alloc_stmt_list ();
+      break;
+
+    case N_Free_Statement:
+      if (!type_annotate_only)
+	{
+	  tree gnu_ptr = gnat_to_gnu (Expression (gnat_node));
+	  tree gnu_ptr_type = TREE_TYPE (gnu_ptr);
+	  tree gnu_obj_type;
+	  tree gnu_actual_obj_type = 0;
+	  tree gnu_obj_size;
+	  unsigned int align;
+	  unsigned int default_allocator_alignment
+	    = get_target_default_allocator_alignment () * BITS_PER_UNIT;
+
+	  /* If this is a thin pointer, we must dereference it to create
+	     a fat pointer, then go back below to a thin pointer.  The
+	     reason for this is that we need a fat pointer someplace in
+	     order to properly compute the size.  */
+	  if (TYPE_THIN_POINTER_P (TREE_TYPE (gnu_ptr)))
+	    gnu_ptr = build_unary_op (ADDR_EXPR, NULL_TREE,
+				      build_unary_op (INDIRECT_REF, NULL_TREE,
+						      gnu_ptr));
+
+	  /* If this is an unconstrained array, we know the object must
+	     have been allocated with the template in front of the object.
+	     So pass the template address, but get the total size.  Do this
+	     by converting to a thin pointer.  */
+	  if (TYPE_FAT_POINTER_P (TREE_TYPE (gnu_ptr)))
+	    gnu_ptr
+	      = convert (build_pointer_type
+			 (TYPE_OBJECT_RECORD_TYPE
+			  (TYPE_UNCONSTRAINED_ARRAY (TREE_TYPE (gnu_ptr)))),
+			 gnu_ptr);
+
+	  gnu_obj_type = TREE_TYPE (TREE_TYPE (gnu_ptr));
+
+	  if (Present (Actual_Designated_Subtype (gnat_node)))
+	    {
+	      gnu_actual_obj_type
+	        = gnat_to_gnu_type (Actual_Designated_Subtype (gnat_node));
+
+	      if (TYPE_FAT_OR_THIN_POINTER_P (gnu_ptr_type))
+	        gnu_actual_obj_type
+	          = build_unc_object_type_from_ptr (gnu_ptr_type,
+		      gnu_actual_obj_type,
+		      get_identifier ("DEALLOC"));
+	    }
+	  else
+	    gnu_actual_obj_type = gnu_obj_type;
+
+	  gnu_obj_size = TYPE_SIZE_UNIT (gnu_actual_obj_type);
+	  align = TYPE_ALIGN (gnu_obj_type);
+
+	  if (TREE_CODE (gnu_obj_type) == RECORD_TYPE
+	      && TYPE_CONTAINS_TEMPLATE_P (gnu_obj_type))
+	    {
+	      tree gnu_char_ptr_type = build_pointer_type (char_type_node);
+	      tree gnu_pos = byte_position (TYPE_FIELDS (gnu_obj_type));
+	      tree gnu_byte_offset
+		= convert (sizetype,
+			   size_diffop (size_zero_node, gnu_pos));
+	      gnu_byte_offset = fold_build1 (NEGATE_EXPR, sizetype, gnu_byte_offset);
+
+	      gnu_ptr = convert (gnu_char_ptr_type, gnu_ptr);
+	      gnu_ptr = build_binary_op (POINTER_PLUS_EXPR, gnu_char_ptr_type,
+					 gnu_ptr, gnu_byte_offset);
+	    }
+
+ 	  /* If the object was allocated from the default storage pool, the
+ 	     alignment was greater than what the allocator provides, and this
+ 	     is not a fat or thin pointer, what we have in gnu_ptr here is an
+ 	     address dynamically adjusted to match the alignment requirement
+ 	     (see build_allocator).  What we need to pass to free is the
+ 	     initial allocator's return value, which has been stored just in
+ 	     front of the block we have.  */
+
+ 	  if (No (Procedure_To_Call (gnat_node))
+ 	      && align > default_allocator_alignment
+ 	      && ! TYPE_FAT_OR_THIN_POINTER_P (gnu_ptr_type))
+ 	    {
+ 	      /* We set GNU_PTR
+ 		 as * (void **)((void *)GNU_PTR - (void *)sizeof(void *))
+ 		 in two steps:  */
+
+ 	      /* GNU_PTR (void *)
+		 = (void *)GNU_PTR - (void *)sizeof (void *))  */
+ 	      gnu_ptr
+ 		= build_binary_op
+		    (POINTER_PLUS_EXPR, ptr_void_type_node,
+		     convert (ptr_void_type_node, gnu_ptr),
+		     size_int (-POINTER_SIZE/BITS_PER_UNIT));
+
+ 	      /* GNU_PTR (void *) = *(void **)GNU_PTR  */
+ 	      gnu_ptr
+ 		= build_unary_op
+		    (INDIRECT_REF, NULL_TREE,
+		     convert (build_pointer_type (ptr_void_type_node),
+			      gnu_ptr));
+ 	    }
+
+	  gnu_result = build_call_alloc_dealloc (gnu_ptr, gnu_obj_size, align,
+						 Procedure_To_Call (gnat_node),
+						 Storage_Pool (gnat_node),
+						 gnat_node);
+	}
+      break;
+
+    case N_Raise_Constraint_Error:
+    case N_Raise_Program_Error:
+    case N_Raise_Storage_Error:
+      if (type_annotate_only)
+	{
+	  gnu_result = alloc_stmt_list ();
+	  break;
+	}
+
+      gnu_result_type = get_unpadded_type (Etype (gnat_node));
+      gnu_result
+	= build_call_raise (UI_To_Int (Reason (gnat_node)), gnat_node,
+			    Nkind (gnat_node));
+
+      /* If the type is VOID, this is a statement, so we need to
+	 generate the code for the call.  Handle a Condition, if there
+	 is one.  */
+      if (TREE_CODE (gnu_result_type) == VOID_TYPE)
+	{
+	  set_expr_location_from_node (gnu_result, gnat_node);
+
+	  if (Present (Condition (gnat_node)))
+	    gnu_result = build3 (COND_EXPR, void_type_node,
+				 gnat_to_gnu (Condition (gnat_node)),
+				 gnu_result, alloc_stmt_list ());
+	}
+      else
+	gnu_result = build1 (NULL_EXPR, gnu_result_type, gnu_result);
+      break;
+
+    case N_Validate_Unchecked_Conversion:
+      {
+	Entity_Id gnat_target_type = Target_Type (gnat_node);
+	tree gnu_source_type = gnat_to_gnu_type (Source_Type (gnat_node));
+	tree gnu_target_type = gnat_to_gnu_type (gnat_target_type);
+
+	/* No need for any warning in this case.  */
+	if (!flag_strict_aliasing)
+	  ;
+
+	/* If the result is a pointer type, see if we are either converting
+	   from a non-pointer or from a pointer to a type with a different
+	   alias set and warn if so.  If the result is defined in the same
+	   unit as this unchecked conversion, we can allow this because we
+	   can know to make the pointer type behave properly.  */
+	else if (POINTER_TYPE_P (gnu_target_type)
+		 && !In_Same_Source_Unit (gnat_target_type, gnat_node)
+		 && !No_Strict_Aliasing (Underlying_Type (gnat_target_type)))
+	  {
+	    tree gnu_source_desig_type = POINTER_TYPE_P (gnu_source_type)
+					 ? TREE_TYPE (gnu_source_type)
+					 : NULL_TREE;
+	    tree gnu_target_desig_type = TREE_TYPE (gnu_target_type);
+
+	    if ((TYPE_DUMMY_P (gnu_target_desig_type)
+		 || get_alias_set (gnu_target_desig_type) != 0)
+	        && (!POINTER_TYPE_P (gnu_source_type)
+		    || (TYPE_DUMMY_P (gnu_source_desig_type)
+			!= TYPE_DUMMY_P (gnu_target_desig_type))
+		    || (TYPE_DUMMY_P (gnu_source_desig_type)
+			&& gnu_source_desig_type != gnu_target_desig_type)
+		    || (get_alias_set (gnu_source_desig_type)
+			!= get_alias_set (gnu_target_desig_type))))
+	      {
+		post_error_ne
+		  ("?possible aliasing problem for type&",
+		   gnat_node, Target_Type (gnat_node));
+		post_error
+		  ("\\?use -fno-strict-aliasing switch for references",
+		   gnat_node);
+		post_error_ne
+		  ("\\?or use `pragma No_Strict_Aliasing (&);`",
+		   gnat_node, Target_Type (gnat_node));
+	      }
+	  }
+
+	/* But if the result is a fat pointer type, we have no mechanism to
+	   do that, so we unconditionally warn in problematic cases.  */
+	else if (TYPE_FAT_POINTER_P (gnu_target_type))
+	  {
+	    tree gnu_source_array_type
+	      = TYPE_FAT_POINTER_P (gnu_source_type)
+		? TREE_TYPE (TREE_TYPE (TYPE_FIELDS (gnu_source_type)))
+		: NULL_TREE;
+	    tree gnu_target_array_type
+	      = TREE_TYPE (TREE_TYPE (TYPE_FIELDS (gnu_target_type)));
+
+	    if ((TYPE_DUMMY_P (gnu_target_array_type)
+		 || get_alias_set (gnu_target_array_type) != 0)
+		&& (!TYPE_FAT_POINTER_P (gnu_source_type)
+		    || (TYPE_DUMMY_P (gnu_source_array_type)
+			!= TYPE_DUMMY_P (gnu_target_array_type))
+		    || (TYPE_DUMMY_P (gnu_source_array_type)
+			&& gnu_source_array_type != gnu_target_array_type)
+		    || (get_alias_set (gnu_source_array_type)
+			!= get_alias_set (gnu_target_array_type))))
+	      {
+		post_error_ne
+		  ("?possible aliasing problem for type&",
+		   gnat_node, Target_Type (gnat_node));
+		post_error
+		  ("\\?use -fno-strict-aliasing switch for references",
+		   gnat_node);
+	      }
+	  }
+      }
+      gnu_result = alloc_stmt_list ();
+      break;
+
+    case N_Raise_Statement:
+    case N_Function_Specification:
+    case N_Procedure_Specification:
+    case N_Op_Concat:
+    case N_Component_Association:
+    case N_Task_Body:
+    default:
+      gcc_assert (type_annotate_only);
+      gnu_result = alloc_stmt_list ();
+    }
+
+  /* If we pushed our level as part of processing the elaboration routine,
+     pop it back now.  */
+  if (went_into_elab_proc)
+    {
+      add_stmt (gnu_result);
+      gnat_poplevel ();
+      gnu_result = end_stmt_group ();
+      current_function_decl = NULL_TREE;
+    }
+
+  /* Set the location information on the result if it is a real expression.
+     References can be reused for multiple GNAT nodes and they would get
+     the location information of their last use.  Note that we may have
+     no result if we tried to build a CALL_EXPR node to a procedure with
+     no side-effects and optimization is enabled.  */
+  if (gnu_result
+      && EXPR_P (gnu_result)
+      && TREE_CODE (gnu_result) != NOP_EXPR
+      && !REFERENCE_CLASS_P (gnu_result))
+    set_expr_location_from_node (gnu_result, gnat_node);
+
+  /* If we're supposed to return something of void_type, it means we have
+     something we're elaborating for effect, so just return.  */
+  if (TREE_CODE (gnu_result_type) == VOID_TYPE)
+    return gnu_result;
+
+  /* If the result is a constant that overflows, raise constraint error.  */
+  else if (TREE_CODE (gnu_result) == INTEGER_CST
+      && TREE_OVERFLOW (gnu_result))
+    {
+      post_error ("Constraint_Error will be raised at run-time?", gnat_node);
+
+      gnu_result
+	= build1 (NULL_EXPR, gnu_result_type,
+		  build_call_raise (CE_Overflow_Check_Failed, gnat_node,
+				    N_Raise_Constraint_Error));
+    }
+
+  /* If our result has side-effects and is of an unconstrained type,
+     make a SAVE_EXPR so that we can be sure it will only be referenced
+     once.  Note we must do this before any conversions.  */
+  if (TREE_SIDE_EFFECTS (gnu_result)
+      && (TREE_CODE (gnu_result_type) == UNCONSTRAINED_ARRAY_TYPE
+	  || CONTAINS_PLACEHOLDER_P (TYPE_SIZE (gnu_result_type))))
+    gnu_result = gnat_stabilize_reference (gnu_result, false);
+
+  /* Now convert the result to the result type, unless we are in one of the
+     following cases:
+
+       1. If this is the Name of an assignment statement or a parameter of
+	  a procedure call, return the result almost unmodified since the
+	  RHS will have to be converted to our type in that case, unless
+	  the result type has a simpler size.   Similarly, don't convert
+	  integral types that are the operands of an unchecked conversion
+	  since we need to ignore those conversions (for 'Valid).
+
+       2. If we have a label (which doesn't have any well-defined type), a
+	  field or an error, return the result almost unmodified.  Also don't
+	  do the conversion if the result type involves a PLACEHOLDER_EXPR in
+	  its size since those are the cases where the front end may have the
+	  type wrong due to "instantiating" the unconstrained record with
+	  discriminant values.  Similarly, if the two types are record types
+	  with the same name don't convert.  This will be the case when we are
+	  converting from a packable version of a type to its original type and
+	  we need those conversions to be NOPs in order for assignments into
+	  these types to work properly.
+
+       3. If the type is void or if we have no result, return error_mark_node
+	  to show we have no result.
+
+       4. Finally, if the type of the result is already correct.  */
+
+  if (Present (Parent (gnat_node))
+      && ((Nkind (Parent (gnat_node)) == N_Assignment_Statement
+	   && Name (Parent (gnat_node)) == gnat_node)
+	  || (Nkind (Parent (gnat_node)) == N_Procedure_Call_Statement
+	      && Name (Parent (gnat_node)) != gnat_node)
+	  || Nkind (Parent (gnat_node)) == N_Parameter_Association
+	  || (Nkind (Parent (gnat_node)) == N_Unchecked_Type_Conversion
+	      && !AGGREGATE_TYPE_P (gnu_result_type)
+	      && !AGGREGATE_TYPE_P (TREE_TYPE (gnu_result))))
+      && !(TYPE_SIZE (gnu_result_type)
+	   && TYPE_SIZE (TREE_TYPE (gnu_result))
+	   && (AGGREGATE_TYPE_P (gnu_result_type)
+	       == AGGREGATE_TYPE_P (TREE_TYPE (gnu_result)))
+	   && ((TREE_CODE (TYPE_SIZE (gnu_result_type)) == INTEGER_CST
+		&& (TREE_CODE (TYPE_SIZE (TREE_TYPE (gnu_result)))
+		    != INTEGER_CST))
+	       || (TREE_CODE (TYPE_SIZE (gnu_result_type)) != INTEGER_CST
+		   && !CONTAINS_PLACEHOLDER_P (TYPE_SIZE (gnu_result_type))
+		   && (CONTAINS_PLACEHOLDER_P
+		       (TYPE_SIZE (TREE_TYPE (gnu_result))))))
+	   && !(TREE_CODE (gnu_result_type) == RECORD_TYPE
+		&& TYPE_JUSTIFIED_MODULAR_P (gnu_result_type))))
+    {
+      /* Remove padding only if the inner object is of self-referential
+	 size: in that case it must be an object of unconstrained type
+	 with a default discriminant and we want to avoid copying too
+	 much data.  */
+      if (TREE_CODE (TREE_TYPE (gnu_result)) == RECORD_TYPE
+	  && TYPE_IS_PADDING_P (TREE_TYPE (gnu_result))
+	  && CONTAINS_PLACEHOLDER_P (TYPE_SIZE (TREE_TYPE (TYPE_FIELDS
+				     (TREE_TYPE (gnu_result))))))
+	gnu_result = convert (TREE_TYPE (TYPE_FIELDS (TREE_TYPE (gnu_result))),
+			      gnu_result);
+    }
+
+  else if (TREE_CODE (gnu_result) == LABEL_DECL
+	   || TREE_CODE (gnu_result) == FIELD_DECL
+	   || TREE_CODE (gnu_result) == ERROR_MARK
+	   || (TYPE_SIZE (gnu_result_type)
+	       && TREE_CODE (TYPE_SIZE (gnu_result_type)) != INTEGER_CST
+	       && TREE_CODE (gnu_result) != INDIRECT_REF
+	       && CONTAINS_PLACEHOLDER_P (TYPE_SIZE (gnu_result_type)))
+	   || ((TYPE_NAME (gnu_result_type)
+		== TYPE_NAME (TREE_TYPE (gnu_result)))
+	       && TREE_CODE (gnu_result_type) == RECORD_TYPE
+	       && TREE_CODE (TREE_TYPE (gnu_result)) == RECORD_TYPE))
+    {
+      /* Remove any padding.  */
+      if (TREE_CODE (TREE_TYPE (gnu_result)) == RECORD_TYPE
+	  && TYPE_IS_PADDING_P (TREE_TYPE (gnu_result)))
+	gnu_result = convert (TREE_TYPE (TYPE_FIELDS (TREE_TYPE (gnu_result))),
+			      gnu_result);
+    }
+
+  else if (gnu_result == error_mark_node || gnu_result_type == void_type_node)
+    gnu_result = error_mark_node;
+
+  else if (gnu_result_type != TREE_TYPE (gnu_result))
+    gnu_result = convert (gnu_result_type, gnu_result);
+
+  /* We don't need any NOP_EXPR or NON_LVALUE_EXPR on the result.  */
+  while ((TREE_CODE (gnu_result) == NOP_EXPR
+	  || TREE_CODE (gnu_result) == NON_LVALUE_EXPR)
+	 && TREE_TYPE (TREE_OPERAND (gnu_result, 0)) == TREE_TYPE (gnu_result))
+    gnu_result = TREE_OPERAND (gnu_result, 0);
+
+  return gnu_result;
+}
+
+/* Subroutine of above to push the exception label stack.  GNU_STACK is
+   a pointer to the stack to update and GNAT_LABEL, if present, is the
+   label to push onto the stack.  */
+
+static void
+push_exception_label_stack (tree *gnu_stack, Entity_Id gnat_label)
+{
+  tree gnu_label = (Present (gnat_label)
+		    ? gnat_to_gnu_entity (gnat_label, NULL_TREE, 0)
+		    : NULL_TREE);
+
+  *gnu_stack = tree_cons (NULL_TREE, gnu_label, *gnu_stack);
+}
+
+/* Record the current code position in GNAT_NODE.  */
+
+static void
+record_code_position (Node_Id gnat_node)
+{
+  tree stmt_stmt = build1 (STMT_STMT, void_type_node, NULL_TREE);
+
+  add_stmt_with_node (stmt_stmt, gnat_node);
+  save_gnu_tree (gnat_node, stmt_stmt, true);
+}
+
+/* Insert the code for GNAT_NODE at the position saved for that node.  */
+
+static void
+insert_code_for (Node_Id gnat_node)
+{
+  STMT_STMT_STMT (get_gnu_tree (gnat_node)) = gnat_to_gnu (gnat_node);
+  save_gnu_tree (gnat_node, NULL_TREE, true);
+}
+
+/* Start a new statement group chained to the previous group.  */
+
+void
+start_stmt_group (void)
+{
+  struct stmt_group *group = stmt_group_free_list;
+
+  /* First see if we can get one from the free list.  */
+  if (group)
+    stmt_group_free_list = group->previous;
+  else
+    group = (struct stmt_group *) ggc_alloc (sizeof (struct stmt_group));
+
+  group->previous = current_stmt_group;
+  group->stmt_list = group->block = group->cleanups = NULL_TREE;
+  current_stmt_group = group;
+}
+
+/* Add GNU_STMT to the current statement group.  */
+
+void
+add_stmt (tree gnu_stmt)
+{
+  append_to_statement_list (gnu_stmt, &current_stmt_group->stmt_list);
+}
+
+/* Similar, but set the location of GNU_STMT to that of GNAT_NODE.  */
+
+void
+add_stmt_with_node (tree gnu_stmt, Node_Id gnat_node)
+{
+  if (Present (gnat_node))
+    set_expr_location_from_node (gnu_stmt, gnat_node);
+  add_stmt (gnu_stmt);
+}
+
+/* Add a declaration statement for GNU_DECL to the current statement group.
+   Get SLOC from Entity_Id.  */
+
+void
+add_decl_expr (tree gnu_decl, Entity_Id gnat_entity)
+{
+  tree type = TREE_TYPE (gnu_decl);
+  tree gnu_stmt, gnu_init, t;
+
+  /* If this is a variable that Gigi is to ignore, we may have been given
+     an ERROR_MARK.  So test for it.  We also might have been given a
+     reference for a renaming.  So only do something for a decl.  Also
+     ignore a TYPE_DECL for an UNCONSTRAINED_ARRAY_TYPE.  */
+  if (!DECL_P (gnu_decl)
+      || (TREE_CODE (gnu_decl) == TYPE_DECL
+	  && TREE_CODE (type) == UNCONSTRAINED_ARRAY_TYPE))
+    return;
+
+  gnu_stmt = build1 (DECL_EXPR, void_type_node, gnu_decl);
+
+  /* If we are global, we don't want to actually output the DECL_EXPR for
+     this decl since we already have evaluated the expressions in the
+     sizes and positions as globals and doing it again would be wrong.  */
+  if (global_bindings_p ())
+    {
+      /* Mark everything as used to prevent node sharing with subprograms.
+	 Note that walk_tree knows how to deal with TYPE_DECL, but neither
+	 VAR_DECL nor CONST_DECL.  This appears to be somewhat arbitrary.  */
+      mark_visited (&gnu_stmt);
+      if (TREE_CODE (gnu_decl) == VAR_DECL
+	  || TREE_CODE (gnu_decl) == CONST_DECL)
+	{
+	  mark_visited (&DECL_SIZE (gnu_decl));
+	  mark_visited (&DECL_SIZE_UNIT (gnu_decl));
+	  mark_visited (&DECL_INITIAL (gnu_decl));
+	}
+      /* In any case, we have to deal with our own TYPE_ADA_SIZE field.  */
+      if (TREE_CODE (gnu_decl) == TYPE_DECL
+	  && (TREE_CODE (type) == RECORD_TYPE
+	      || TREE_CODE (type) == UNION_TYPE
+	      || TREE_CODE (type) == QUAL_UNION_TYPE)
+	  && (t = TYPE_ADA_SIZE (type)))
+	mark_visited (&t);
+    }
+  else
+    add_stmt_with_node (gnu_stmt, gnat_entity);
+
+  /* If this is a variable and an initializer is attached to it, it must be
+     valid for the context.  Similar to init_const in create_var_decl_1.  */
+  if (TREE_CODE (gnu_decl) == VAR_DECL
+      && (gnu_init = DECL_INITIAL (gnu_decl)) != NULL_TREE
+      && (!gnat_types_compatible_p (type, TREE_TYPE (gnu_init))
+	  || (TREE_STATIC (gnu_decl)
+	      && !initializer_constant_valid_p (gnu_init,
+						TREE_TYPE (gnu_init)))))
+    {
+      /* If GNU_DECL has a padded type, convert it to the unpadded
+	 type so the assignment is done properly.  */
+      if (TREE_CODE (type) == RECORD_TYPE && TYPE_IS_PADDING_P (type))
+	t = convert (TREE_TYPE (TYPE_FIELDS (type)), gnu_decl);
+      else
+	t = gnu_decl;
+
+      gnu_stmt = build_binary_op (MODIFY_EXPR, NULL_TREE, t, gnu_init);
+
+      DECL_INITIAL (gnu_decl) = NULL_TREE;
+      if (TREE_READONLY (gnu_decl))
+	{
+	  TREE_READONLY (gnu_decl) = 0;
+	  DECL_READONLY_ONCE_ELAB (gnu_decl) = 1;
+	}
+
+      add_stmt_with_node (gnu_stmt, gnat_entity);
+    }
+}
+
+/* Callback for walk_tree to mark the visited trees rooted at *TP.  */
+
+static tree
+mark_visited_r (tree *tp, int *walk_subtrees, void *data ATTRIBUTE_UNUSED)
+{
+  if (TREE_VISITED (*tp))
+    *walk_subtrees = 0;
+
+  /* Don't mark a dummy type as visited because we want to mark its sizes
+     and fields once it's filled in.  */
+  else if (!TYPE_IS_DUMMY_P (*tp))
+    TREE_VISITED (*tp) = 1;
+
+  if (TYPE_P (*tp))
+    TYPE_SIZES_GIMPLIFIED (*tp) = 1;
+
+  return NULL_TREE;
+}
+
+/* Utility function to unshare expressions wrapped up in a SAVE_EXPR.  */
+
+static tree
+unshare_save_expr (tree *tp, int *walk_subtrees ATTRIBUTE_UNUSED,
+		   void *data ATTRIBUTE_UNUSED)
+{
+  tree t = *tp;
+
+  if (TREE_CODE (t) == SAVE_EXPR)
+    TREE_OPERAND (t, 0) = unshare_expr (TREE_OPERAND (t, 0));
+
+  return NULL_TREE;
+}
+
+/* Mark nodes rooted at *TP with TREE_VISITED and types as having their
+   sized gimplified.  We use this to indicate all variable sizes and
+   positions in global types may not be shared by any subprogram.  */
+
+void
+mark_visited (tree *tp)
+{
+  walk_tree (tp, mark_visited_r, NULL, NULL);
+}
+
+/* Add GNU_CLEANUP, a cleanup action, to the current code group and
+   set its location to that of GNAT_NODE if present.  */
+
+static void
+add_cleanup (tree gnu_cleanup, Node_Id gnat_node)
+{
+  if (Present (gnat_node))
+    set_expr_location_from_node (gnu_cleanup, gnat_node);
+  append_to_statement_list (gnu_cleanup, &current_stmt_group->cleanups);
+}
+
+/* Set the BLOCK node corresponding to the current code group to GNU_BLOCK.  */
+
+void
+set_block_for_group (tree gnu_block)
+{
+  gcc_assert (!current_stmt_group->block);
+  current_stmt_group->block = gnu_block;
+}
+
+/* Return code corresponding to the current code group.  It is normally
+   a STATEMENT_LIST, but may also be a BIND_EXPR or TRY_FINALLY_EXPR if
+   BLOCK or cleanups were set.  */
+
+tree
+end_stmt_group (void)
+{
+  struct stmt_group *group = current_stmt_group;
+  tree gnu_retval = group->stmt_list;
+
+  /* If this is a null list, allocate a new STATEMENT_LIST.  Then, if there
+     are cleanups, make a TRY_FINALLY_EXPR.  Last, if there is a BLOCK,
+     make a BIND_EXPR.  Note that we nest in that because the cleanup may
+     reference variables in the block.  */
+  if (gnu_retval == NULL_TREE)
+    gnu_retval = alloc_stmt_list ();
+
+  if (group->cleanups)
+    gnu_retval = build2 (TRY_FINALLY_EXPR, void_type_node, gnu_retval,
+			 group->cleanups);
+
+  if (current_stmt_group->block)
+    gnu_retval = build3 (BIND_EXPR, void_type_node, BLOCK_VARS (group->block),
+			 gnu_retval, group->block);
+
+  /* Remove this group from the stack and add it to the free list.  */
+  current_stmt_group = group->previous;
+  group->previous = stmt_group_free_list;
+  stmt_group_free_list = group;
+
+  return gnu_retval;
+}
+
+/* Add a list of statements from GNAT_LIST, a possibly-empty list of
+   statements.*/
+
+static void
+add_stmt_list (List_Id gnat_list)
+{
+  Node_Id gnat_node;
+
+  if (Present (gnat_list))
+    for (gnat_node = First (gnat_list); Present (gnat_node);
+	 gnat_node = Next (gnat_node))
+      add_stmt (gnat_to_gnu (gnat_node));
+}
+
+/* Build a tree from GNAT_LIST, a possibly-empty list of statements.
+   If BINDING_P is true, push and pop a binding level around the list.  */
+
+static tree
+build_stmt_group (List_Id gnat_list, bool binding_p)
+{
+  start_stmt_group ();
+  if (binding_p)
+    gnat_pushlevel ();
+
+  add_stmt_list (gnat_list);
+  if (binding_p)
+    gnat_poplevel ();
+
+  return end_stmt_group ();
+}
+
+/* Push and pop routines for stacks.  We keep a free list around so we
+   don't waste tree nodes.  */
+
+static void
+push_stack (tree *gnu_stack_ptr, tree gnu_purpose, tree gnu_value)
+{
+  tree gnu_node = gnu_stack_free_list;
+
+  if (gnu_node)
+    {
+      gnu_stack_free_list = TREE_CHAIN (gnu_node);
+      TREE_CHAIN (gnu_node) = *gnu_stack_ptr;
+      TREE_PURPOSE (gnu_node) = gnu_purpose;
+      TREE_VALUE (gnu_node) = gnu_value;
+    }
+  else
+    gnu_node = tree_cons (gnu_purpose, gnu_value, *gnu_stack_ptr);
+
+  *gnu_stack_ptr = gnu_node;
+}
+
+static void
+pop_stack (tree *gnu_stack_ptr)
+{
+  tree gnu_node = *gnu_stack_ptr;
+
+  *gnu_stack_ptr = TREE_CHAIN (gnu_node);
+  TREE_CHAIN (gnu_node) = gnu_stack_free_list;
+  gnu_stack_free_list = gnu_node;
+}
+
+/* Generate GIMPLE in place for the expression at *EXPR_P.  */
+
+int
+gnat_gimplify_expr (tree *expr_p, gimple_seq *pre_p,
+		    gimple_seq *post_p ATTRIBUTE_UNUSED)
+{
+  tree expr = *expr_p;
+  tree op;
+
+  if (IS_ADA_STMT (expr))
+    return gnat_gimplify_stmt (expr_p);
+
+  switch (TREE_CODE (expr))
+    {
+    case NULL_EXPR:
+      /* If this is for a scalar, just make a VAR_DECL for it.  If for
+	 an aggregate, get a null pointer of the appropriate type and
+	 dereference it.  */
+      if (AGGREGATE_TYPE_P (TREE_TYPE (expr)))
+	*expr_p = build1 (INDIRECT_REF, TREE_TYPE (expr),
+			  convert (build_pointer_type (TREE_TYPE (expr)),
+				   integer_zero_node));
+      else
+	{
+	  *expr_p = create_tmp_var (TREE_TYPE (expr), NULL);
+	  TREE_NO_WARNING (*expr_p) = 1;
+	}
+
+      gimplify_and_add (TREE_OPERAND (expr, 0), pre_p);
+      return GS_OK;
+
+    case UNCONSTRAINED_ARRAY_REF:
+      /* We should only do this if we are just elaborating for side-effects,
+	 but we can't know that yet.  */
+      *expr_p = TREE_OPERAND (*expr_p, 0);
+      return GS_OK;
+
+    case ADDR_EXPR:
+      op = TREE_OPERAND (expr, 0);
+
+      /* If we're taking the address of a constant CONSTRUCTOR, force it to
+	 be put into static memory.  We know it's going to be readonly given
+	 the semantics we have and it's required to be static memory in
+	 the case when the reference is in an elaboration procedure.   */
+      if (TREE_CODE (op) == CONSTRUCTOR && TREE_CONSTANT (op))
+	{
+	  tree new_var = create_tmp_var (TREE_TYPE (op), "C");
+
+	  TREE_READONLY (new_var) = 1;
+	  TREE_STATIC (new_var) = 1;
+	  TREE_ADDRESSABLE (new_var) = 1;
+	  DECL_INITIAL (new_var) = op;
+
+	  TREE_OPERAND (expr, 0) = new_var;
+	  recompute_tree_invariant_for_addr_expr (expr);
+	  return GS_ALL_DONE;
+	}
+
+      /* If we are taking the address of a SAVE_EXPR, we are typically
+	 processing a misaligned argument to be passed by reference in a
+	 procedure call.  We just mark the operand as addressable + not
+	 readonly here and let the common gimplifier code perform the
+	 temporary creation, initialization, and "instantiation" in place of
+	 the SAVE_EXPR in further operands, in particular in the copy back
+	 code inserted after the call.  */
+      else if (TREE_CODE (op) == SAVE_EXPR)
+	{
+	  TREE_ADDRESSABLE (op) = 1;
+	  TREE_READONLY (op) = 0;
+	}
+
+      /* We let the gimplifier process &COND_EXPR and expect it to yield the
+	 address of the selected operand when it is addressable.  Besides, we
+	 also expect addressable_p to only let COND_EXPRs where both arms are
+	 addressable reach here.  */
+      else if (TREE_CODE (op) == COND_EXPR)
+	;
+
+      /* Otherwise, if we are taking the address of something that is neither
+	 reference, declaration, or constant, make a variable for the operand
+	 here and then take its address.  If we don't do it this way, we may
+	 confuse the gimplifier because it needs to know the variable is
+	 addressable at this point.  This duplicates code in
+	 internal_get_tmp_var, which is unfortunate.  */
+      else if (TREE_CODE_CLASS (TREE_CODE (op)) != tcc_reference
+	       && TREE_CODE_CLASS (TREE_CODE (op)) != tcc_declaration
+	       && TREE_CODE_CLASS (TREE_CODE (op)) != tcc_constant)
+	{
+	  tree new_var = create_tmp_var (TREE_TYPE (op), "A");
+	  gimple stmt;
+
+	  TREE_ADDRESSABLE (new_var) = 1;
+
+	  stmt = gimplify_assign (new_var, op, pre_p);
+	  if (EXPR_HAS_LOCATION (op))
+	    gimple_set_location (stmt, *EXPR_LOCUS (op));
+
+	  TREE_OPERAND (expr, 0) = new_var;
+	  recompute_tree_invariant_for_addr_expr (expr);
+	  return GS_ALL_DONE;
+	}
+
+      /* ... fall through ... */
+
+    default:
+      return GS_UNHANDLED;
+    }
+}
+
+/* Generate GIMPLE in place for the statement at *STMT_P.  */
+
+static enum gimplify_status
+gnat_gimplify_stmt (tree *stmt_p)
+{
+  tree stmt = *stmt_p;
+
+  switch (TREE_CODE (stmt))
+    {
+    case STMT_STMT:
+      *stmt_p = STMT_STMT_STMT (stmt);
+      return GS_OK;
+
+    case LOOP_STMT:
+      {
+	tree gnu_start_label = create_artificial_label ();
+	tree gnu_end_label = LOOP_STMT_LABEL (stmt);
+	tree t;
+
+	/* Set to emit the statements of the loop.  */
+	*stmt_p = NULL_TREE;
+
+	/* We first emit the start label and then a conditional jump to
+	   the end label if there's a top condition, then the body of the
+	   loop, then a conditional branch to the end label, then the update,
+	   if any, and finally a jump to the start label and the definition
+	   of the end label.  */
+	append_to_statement_list (build1 (LABEL_EXPR, void_type_node,
+					  gnu_start_label),
+				  stmt_p);
+
+	if (LOOP_STMT_TOP_COND (stmt))
+	  append_to_statement_list (build3 (COND_EXPR, void_type_node,
+					    LOOP_STMT_TOP_COND (stmt),
+					    alloc_stmt_list (),
+					    build1 (GOTO_EXPR,
+						    void_type_node,
+						    gnu_end_label)),
+				    stmt_p);
+
+	append_to_statement_list (LOOP_STMT_BODY (stmt), stmt_p);
+
+	if (LOOP_STMT_BOT_COND (stmt))
+	  append_to_statement_list (build3 (COND_EXPR, void_type_node,
+					    LOOP_STMT_BOT_COND (stmt),
+					    alloc_stmt_list (),
+					    build1 (GOTO_EXPR,
+						    void_type_node,
+						    gnu_end_label)),
+				    stmt_p);
+
+	if (LOOP_STMT_UPDATE (stmt))
+	  append_to_statement_list (LOOP_STMT_UPDATE (stmt), stmt_p);
+
+	t = build1 (GOTO_EXPR, void_type_node, gnu_start_label);
+	SET_EXPR_LOCATION (t, DECL_SOURCE_LOCATION (gnu_end_label));
+	append_to_statement_list (t, stmt_p);
+
+	append_to_statement_list (build1 (LABEL_EXPR, void_type_node,
+					  gnu_end_label),
+				  stmt_p);
+	return GS_OK;
+      }
+
+    case EXIT_STMT:
+      /* Build a statement to jump to the corresponding end label, then
+	 see if it needs to be conditional.  */
+      *stmt_p = build1 (GOTO_EXPR, void_type_node, EXIT_STMT_LABEL (stmt));
+      if (EXIT_STMT_COND (stmt))
+	*stmt_p = build3 (COND_EXPR, void_type_node,
+			  EXIT_STMT_COND (stmt), *stmt_p, alloc_stmt_list ());
+      return GS_OK;
+
+    default:
+      gcc_unreachable ();
+    }
+}
+
+/* Force references to each of the entities in packages withed by GNAT_NODE.
+   Operate recursively but check that we aren't elaborating something more
+   than once.
+
+   This routine is exclusively called in type_annotate mode, to compute DDA
+   information for types in withed units, for ASIS use.  */
+
+static void
+elaborate_all_entities (Node_Id gnat_node)
+{
+  Entity_Id gnat_with_clause, gnat_entity;
+
+  /* Process each unit only once.  As we trace the context of all relevant
+     units transitively, including generic bodies, we may encounter the
+     same generic unit repeatedly.  */
+  if (!present_gnu_tree (gnat_node))
+     save_gnu_tree (gnat_node, integer_zero_node, true);
+
+  /* Save entities in all context units.  A body may have an implicit_with
+     on its own spec, if the context includes a child unit, so don't save
+     the spec twice.  */
+  for (gnat_with_clause = First (Context_Items (gnat_node));
+       Present (gnat_with_clause);
+       gnat_with_clause = Next (gnat_with_clause))
+    if (Nkind (gnat_with_clause) == N_With_Clause
+	&& !present_gnu_tree (Library_Unit (gnat_with_clause))
+	&& Library_Unit (gnat_with_clause) != Library_Unit (Cunit (Main_Unit)))
+      {
+	elaborate_all_entities (Library_Unit (gnat_with_clause));
+
+	if (Ekind (Entity (Name (gnat_with_clause))) == E_Package)
+	  {
+	    for (gnat_entity = First_Entity (Entity (Name (gnat_with_clause)));
+		 Present (gnat_entity);
+		 gnat_entity = Next_Entity (gnat_entity))
+	      if (Is_Public (gnat_entity)
+		  && Convention (gnat_entity) != Convention_Intrinsic
+		  && Ekind (gnat_entity) != E_Package
+		  && Ekind (gnat_entity) != E_Package_Body
+		  && Ekind (gnat_entity) != E_Operator
+		  && !(IN (Ekind (gnat_entity), Type_Kind)
+		       && !Is_Frozen (gnat_entity))
+		  && !((Ekind (gnat_entity) == E_Procedure
+			|| Ekind (gnat_entity) == E_Function)
+		       && Is_Intrinsic_Subprogram (gnat_entity))
+		  && !IN (Ekind (gnat_entity), Named_Kind)
+		  && !IN (Ekind (gnat_entity), Generic_Unit_Kind))
+		gnat_to_gnu_entity (gnat_entity, NULL_TREE, 0);
+          }
+	else if (Ekind (Entity (Name (gnat_with_clause))) == E_Generic_Package)
+	  {
+	    Node_Id gnat_body
+	      = Corresponding_Body (Unit (Library_Unit (gnat_with_clause)));
+
+	    /* Retrieve compilation unit node of generic body.  */
+	    while (Present (gnat_body)
+		   && Nkind (gnat_body) != N_Compilation_Unit)
+	      gnat_body = Parent (gnat_body);
+
+	    /* If body is available, elaborate its context.  */
+	    if (Present (gnat_body))
+	      elaborate_all_entities (gnat_body);
+	  }
+      }
+
+  if (Nkind (Unit (gnat_node)) == N_Package_Body)
+    elaborate_all_entities (Library_Unit (gnat_node));
+}
+
+/* Do the processing of N_Freeze_Entity, GNAT_NODE.  */
+
+static void
+process_freeze_entity (Node_Id gnat_node)
+{
+  Entity_Id gnat_entity = Entity (gnat_node);
+  tree gnu_old;
+  tree gnu_new;
+  tree gnu_init
+    = (Nkind (Declaration_Node (gnat_entity)) == N_Object_Declaration
+       && present_gnu_tree (Declaration_Node (gnat_entity)))
+      ? get_gnu_tree (Declaration_Node (gnat_entity)) : NULL_TREE;
+
+  /* If this is a package, need to generate code for the package.  */
+  if (Ekind (gnat_entity) == E_Package)
+    {
+      insert_code_for
+  	(Parent (Corresponding_Body
+  		 (Parent (Declaration_Node (gnat_entity)))));
+      return;
+    }
+
+  /* Check for old definition after the above call.  This Freeze_Node
+     might be for one its Itypes.  */
+  gnu_old
+    = present_gnu_tree (gnat_entity) ? get_gnu_tree (gnat_entity) : 0;
+
+  /* If this entity has an Address representation clause, GNU_OLD is the
+     address, so discard it here. */
+  if (Present (Address_Clause (gnat_entity)))
+    gnu_old = 0;
+
+  /* Don't do anything for class-wide types they are always
+     transformed into their root type.  */
+  if (Ekind (gnat_entity) == E_Class_Wide_Type
+      || (Ekind (gnat_entity) == E_Class_Wide_Subtype
+	  && Present (Equivalent_Type (gnat_entity))))
+    return;
+
+  /* Don't do anything for subprograms that may have been elaborated before
+     their freeze nodes.  This can happen, for example because of an inner call
+     in an instance body, or a previous compilation of a spec for inlining
+     purposes. */
+  if (gnu_old
+      && ((TREE_CODE (gnu_old) == FUNCTION_DECL
+	   && (Ekind (gnat_entity) == E_Function
+	       || Ekind (gnat_entity) == E_Procedure))
+	  || (gnu_old
+	      && TREE_CODE (TREE_TYPE (gnu_old)) == FUNCTION_TYPE
+	      && Ekind (gnat_entity) == E_Subprogram_Type)))
+    return;
+
+  /* If we have a non-dummy type old tree, we have nothing to do, except
+     aborting if this is the public view of a private type whose full view was
+     not delayed, as this node was never delayed as it should have been.  We
+     let this happen for concurrent types and their Corresponding_Record_Type,
+     however, because each might legitimately be elaborated before it's own
+     freeze node, e.g. while processing the other.  */
+  if (gnu_old
+      && !(TREE_CODE (gnu_old) == TYPE_DECL
+	   && TYPE_IS_DUMMY_P (TREE_TYPE (gnu_old))))
+    {
+      gcc_assert ((IN (Ekind (gnat_entity), Incomplete_Or_Private_Kind)
+		   && Present (Full_View (gnat_entity))
+		   && No (Freeze_Node (Full_View (gnat_entity))))
+		  || Is_Concurrent_Type (gnat_entity)
+		  || (IN (Ekind (gnat_entity), Record_Kind)
+		      && Is_Concurrent_Record_Type (gnat_entity)));
+      return;
+    }
+
+  /* Reset the saved tree, if any, and elaborate the object or type for real.
+     If there is a full declaration, elaborate it and copy the type to
+     GNAT_ENTITY.  Likewise if this is the record subtype corresponding to
+     a class wide type or subtype. */
+  if (gnu_old)
+    {
+      save_gnu_tree (gnat_entity, NULL_TREE, false);
+      if (IN (Ekind (gnat_entity), Incomplete_Or_Private_Kind)
+  	  && Present (Full_View (gnat_entity))
+  	  && present_gnu_tree (Full_View (gnat_entity)))
+  	save_gnu_tree (Full_View (gnat_entity), NULL_TREE, false);
+      if (Present (Class_Wide_Type (gnat_entity))
+	  && Class_Wide_Type (gnat_entity) != gnat_entity)
+	save_gnu_tree (Class_Wide_Type (gnat_entity), NULL_TREE, false);
+    }
+
+  if (IN (Ekind (gnat_entity), Incomplete_Or_Private_Kind)
+      && Present (Full_View (gnat_entity)))
+    {
+      gnu_new = gnat_to_gnu_entity (Full_View (gnat_entity), NULL_TREE, 1);
+
+      /* Propagate back-annotations from full view to partial view.  */
+      if (Unknown_Alignment (gnat_entity))
+	Set_Alignment (gnat_entity, Alignment (Full_View (gnat_entity)));
+
+      if (Unknown_Esize (gnat_entity))
+	Set_Esize (gnat_entity, Esize (Full_View (gnat_entity)));
+
+      if (Unknown_RM_Size (gnat_entity))
+	Set_RM_Size (gnat_entity, RM_Size (Full_View (gnat_entity)));
+
+      /* The above call may have defined this entity (the simplest example
+  	 of this is when we have a private enumeral type since the bounds
+  	 will have the public view.  */
+      if (!present_gnu_tree (gnat_entity))
+  	save_gnu_tree (gnat_entity, gnu_new, false);
+      if (Present (Class_Wide_Type (gnat_entity))
+	  && Class_Wide_Type (gnat_entity) != gnat_entity)
+	save_gnu_tree (Class_Wide_Type (gnat_entity), gnu_new, false);
+    }
+  else
+    gnu_new = gnat_to_gnu_entity (gnat_entity, gnu_init, 1);
+
+  /* If we've made any pointers to the old version of this type, we
+     have to update them.  */
+  if (gnu_old)
+    update_pointer_to (TYPE_MAIN_VARIANT (TREE_TYPE (gnu_old)),
+		       TREE_TYPE (gnu_new));
+}
+
+/* Process the list of inlined subprograms of GNAT_NODE, which is an
+   N_Compilation_Unit.  */
+
+static void
+process_inlined_subprograms (Node_Id gnat_node)
+{
+  Entity_Id gnat_entity;
+  Node_Id gnat_body;
+
+  /* If we can inline, generate RTL for all the inlined subprograms.
+     Define the entity first so we set DECL_EXTERNAL.  */
+  if (optimize > 0 && !flag_really_no_inline)
+    for (gnat_entity = First_Inlined_Subprogram (gnat_node);
+	 Present (gnat_entity);
+	 gnat_entity = Next_Inlined_Subprogram (gnat_entity))
+      {
+	gnat_body = Parent (Declaration_Node (gnat_entity));
+
+	if (Nkind (gnat_body) != N_Subprogram_Body)
+	  {
+	    /* ??? This really should always be Present.  */
+	    if (No (Corresponding_Body (gnat_body)))
+	      continue;
+
+	    gnat_body
+	      = Parent (Declaration_Node (Corresponding_Body (gnat_body)));
+	  }
+
+	if (Present (gnat_body))
+	  {
+	    gnat_to_gnu_entity (gnat_entity, NULL_TREE, 0);
+	    add_stmt (gnat_to_gnu (gnat_body));
+	  }
+      }
+}
+
+/* Elaborate decls in the lists GNAT_DECLS and GNAT_DECLS2, if present.
+   We make two passes, one to elaborate anything other than bodies (but
+   we declare a function if there was no spec).  The second pass
+   elaborates the bodies.
+
+   GNAT_END_LIST gives the element in the list past the end.  Normally,
+   this is Empty, but can be First_Real_Statement for a
+   Handled_Sequence_Of_Statements.
+
+   We make a complete pass through both lists if PASS1P is true, then make
+   the second pass over both lists if PASS2P is true.  The lists usually
+   correspond to the public and private parts of a package.  */
+
+static void
+process_decls (List_Id gnat_decls, List_Id gnat_decls2,
+               Node_Id gnat_end_list, bool pass1p, bool pass2p)
+{
+  List_Id gnat_decl_array[2];
+  Node_Id gnat_decl;
+  int i;
+
+  gnat_decl_array[0] = gnat_decls, gnat_decl_array[1] = gnat_decls2;
+
+  if (pass1p)
+    for (i = 0; i <= 1; i++)
+      if (Present (gnat_decl_array[i]))
+	for (gnat_decl = First (gnat_decl_array[i]);
+	     gnat_decl != gnat_end_list; gnat_decl = Next (gnat_decl))
+	  {
+	    /* For package specs, we recurse inside the declarations,
+	       thus taking the two pass approach inside the boundary.  */
+	    if (Nkind (gnat_decl) == N_Package_Declaration
+		&& (Nkind (Specification (gnat_decl)
+			   == N_Package_Specification)))
+	      process_decls (Visible_Declarations (Specification (gnat_decl)),
+			     Private_Declarations (Specification (gnat_decl)),
+			     Empty, true, false);
+
+	    /* Similarly for any declarations in the actions of a
+	       freeze node.  */
+	    else if (Nkind (gnat_decl) == N_Freeze_Entity)
+	      {
+		process_freeze_entity (gnat_decl);
+		process_decls (Actions (gnat_decl), Empty, Empty, true, false);
+	      }
+
+	    /* Package bodies with freeze nodes get their elaboration deferred
+	       until the freeze node, but the code must be placed in the right
+	       place, so record the code position now.  */
+	    else if (Nkind (gnat_decl) == N_Package_Body
+		     && Present (Freeze_Node (Corresponding_Spec (gnat_decl))))
+	      record_code_position (gnat_decl);
+
+            else if (Nkind (gnat_decl) == N_Package_Body_Stub
+		     && Present (Library_Unit (gnat_decl))
+		     && Present (Freeze_Node
+				 (Corresponding_Spec
+				  (Proper_Body (Unit
+						(Library_Unit (gnat_decl)))))))
+	      record_code_position
+		(Proper_Body (Unit (Library_Unit (gnat_decl))));
+
+	    /* We defer most subprogram bodies to the second pass.  */
+	    else if (Nkind (gnat_decl) == N_Subprogram_Body)
+	      {
+		if (Acts_As_Spec (gnat_decl))
+		  {
+		    Node_Id gnat_subprog_id = Defining_Entity (gnat_decl);
+
+		    if (Ekind (gnat_subprog_id) != E_Generic_Procedure
+			&& Ekind (gnat_subprog_id) != E_Generic_Function)
+		      gnat_to_gnu_entity (gnat_subprog_id, NULL_TREE, 1);
+		  }
+	      }
+            /* For bodies and stubs that act as their own specs, the entity
+               itself must be elaborated in the first pass, because it may
+               be used in other declarations. */
+	    else if (Nkind (gnat_decl) == N_Subprogram_Body_Stub)
+	      {
+                  Node_Id gnat_subprog_id =
+                     Defining_Entity (Specification (gnat_decl));
+
+		    if (Ekind (gnat_subprog_id) != E_Subprogram_Body
+                        && Ekind (gnat_subprog_id) != E_Generic_Procedure
+			&& Ekind (gnat_subprog_id) != E_Generic_Function)
+		      gnat_to_gnu_entity (gnat_subprog_id, NULL_TREE, 1);
+               }
+
+	    /* Concurrent stubs stand for the corresponding subprogram bodies,
+	       which are deferred like other bodies.  */
+	    else if (Nkind (gnat_decl) == N_Task_Body_Stub
+		     || Nkind (gnat_decl) == N_Protected_Body_Stub)
+	      ;
+	    else
+	      add_stmt (gnat_to_gnu (gnat_decl));
+	  }
+
+  /* Here we elaborate everything we deferred above except for package bodies,
+     which are elaborated at their freeze nodes.  Note that we must also
+     go inside things (package specs and freeze nodes) the first pass did.  */
+  if (pass2p)
+    for (i = 0; i <= 1; i++)
+      if (Present (gnat_decl_array[i]))
+	for (gnat_decl = First (gnat_decl_array[i]);
+	     gnat_decl != gnat_end_list; gnat_decl = Next (gnat_decl))
+	  {
+	    if (Nkind (gnat_decl) == N_Subprogram_Body
+		|| Nkind (gnat_decl) == N_Subprogram_Body_Stub
+		|| Nkind (gnat_decl) == N_Task_Body_Stub
+		|| Nkind (gnat_decl) == N_Protected_Body_Stub)
+	      add_stmt (gnat_to_gnu (gnat_decl));
+
+	    else if (Nkind (gnat_decl) == N_Package_Declaration
+		     && (Nkind (Specification (gnat_decl)
+				== N_Package_Specification)))
+	      process_decls (Visible_Declarations (Specification (gnat_decl)),
+			     Private_Declarations (Specification (gnat_decl)),
+			     Empty, false, true);
+
+	    else if (Nkind (gnat_decl) == N_Freeze_Entity)
+	      process_decls (Actions (gnat_decl), Empty, Empty, false, true);
+	  }
+}
+
+/* Emit code for a range check. GNU_EXPR is the expression to be checked,
+   GNAT_RANGE_TYPE the gnat type or subtype containing the bounds against
+   which we have to check. */
+
+static tree
+emit_range_check (tree gnu_expr, Entity_Id gnat_range_type)
+{
+  tree gnu_range_type = get_unpadded_type (gnat_range_type);
+  tree gnu_low  = TYPE_MIN_VALUE (gnu_range_type);
+  tree gnu_high = TYPE_MAX_VALUE (gnu_range_type);
+  tree gnu_compare_type = get_base_type (TREE_TYPE (gnu_expr));
+
+  /* If GNU_EXPR has GNAT_RANGE_TYPE as its base type, no check is needed.
+     This can for example happen when translating 'Val or 'Value.  */
+  if (gnu_compare_type == gnu_range_type)
+    return gnu_expr;
+
+  /* If GNU_EXPR has an integral type that is narrower than GNU_RANGE_TYPE,
+     we can't do anything since we might be truncating the bounds.  No
+     check is needed in this case.  */
+  if (INTEGRAL_TYPE_P (TREE_TYPE (gnu_expr))
+      && (TYPE_PRECISION (gnu_compare_type)
+	  < TYPE_PRECISION (get_base_type (gnu_range_type))))
+    return gnu_expr;
+
+  /* Checked expressions must be evaluated only once. */
+  gnu_expr = protect_multiple_eval (gnu_expr);
+
+  /* There's no good type to use here, so we might as well use
+     integer_type_node. Note that the form of the check is
+        (not (expr >= lo)) or (not (expr <= hi))
+      the reason for this slightly convoluted form is that NaNs
+      are not considered to be in range in the float case. */
+  return emit_check
+    (build_binary_op (TRUTH_ORIF_EXPR, integer_type_node,
+		      invert_truthvalue
+		      (build_binary_op (GE_EXPR, integer_type_node,
+				       convert (gnu_compare_type, gnu_expr),
+				       convert (gnu_compare_type, gnu_low))),
+		      invert_truthvalue
+		      (build_binary_op (LE_EXPR, integer_type_node,
+					convert (gnu_compare_type, gnu_expr),
+					convert (gnu_compare_type,
+						 gnu_high)))),
+     gnu_expr, CE_Range_Check_Failed);
+}
+
+/* Emit code for an index check. GNU_ARRAY_OBJECT is the array object
+   which we are about to index, GNU_EXPR is the index expression to be
+   checked, GNU_LOW and GNU_HIGH are the lower and upper bounds
+   against which GNU_EXPR has to be checked. Note that for index
+   checking we cannot use the emit_range_check function (although very
+   similar code needs to be generated in both cases) since for index
+   checking the array type against which we are checking the indices
+   may be unconstrained and consequently we need to retrieve the
+   actual index bounds from the array object itself
+   (GNU_ARRAY_OBJECT). The place where we need to do that is in
+   subprograms having unconstrained array formal parameters */
+
+static tree
+emit_index_check (tree gnu_array_object,
+                  tree gnu_expr,
+                  tree gnu_low,
+                  tree gnu_high)
+{
+  tree gnu_expr_check;
+
+  /* Checked expressions must be evaluated only once. */
+  gnu_expr = protect_multiple_eval (gnu_expr);
+
+  /* Must do this computation in the base type in case the expression's
+     type is an unsigned subtypes.  */
+  gnu_expr_check = convert (get_base_type (TREE_TYPE (gnu_expr)), gnu_expr);
+
+  /* If GNU_LOW or GNU_HIGH are a PLACEHOLDER_EXPR, qualify them by
+     the object we are handling. */
+  gnu_low = SUBSTITUTE_PLACEHOLDER_IN_EXPR (gnu_low, gnu_array_object);
+  gnu_high = SUBSTITUTE_PLACEHOLDER_IN_EXPR (gnu_high, gnu_array_object);
+
+  /* There's no good type to use here, so we might as well use
+     integer_type_node.   */
+  return emit_check
+    (build_binary_op (TRUTH_ORIF_EXPR, integer_type_node,
+		      build_binary_op (LT_EXPR, integer_type_node,
+				       gnu_expr_check,
+				       convert (TREE_TYPE (gnu_expr_check),
+						gnu_low)),
+		      build_binary_op (GT_EXPR, integer_type_node,
+				       gnu_expr_check,
+				       convert (TREE_TYPE (gnu_expr_check),
+						gnu_high))),
+     gnu_expr, CE_Index_Check_Failed);
+}
+
+/* GNU_COND contains the condition corresponding to an access, discriminant or
+   range check of value GNU_EXPR.  Build a COND_EXPR that returns GNU_EXPR if
+   GNU_COND is false and raises a CONSTRAINT_ERROR if GNU_COND is true.
+   REASON is the code that says why the exception was raised.  */
+
+static tree
+emit_check (tree gnu_cond, tree gnu_expr, int reason)
+{
+  tree gnu_call;
+  tree gnu_result;
+
+  gnu_call = build_call_raise (reason, Empty, N_Raise_Constraint_Error);
+
+  /* Use an outer COMPOUND_EXPR to make sure that GNU_EXPR will get evaluated
+     in front of the comparison in case it ends up being a SAVE_EXPR.  Put the
+     whole thing inside its own SAVE_EXPR so the inner SAVE_EXPR doesn't leak
+     out.  */
+  gnu_result = fold_build3 (COND_EXPR, TREE_TYPE (gnu_expr), gnu_cond,
+			    build2 (COMPOUND_EXPR, TREE_TYPE (gnu_expr),
+				    gnu_call, gnu_expr),
+			    gnu_expr);
+
+  /* If GNU_EXPR has side effects, make the outer COMPOUND_EXPR and
+     protect it.  Otherwise, show GNU_RESULT has no side effects: we
+     don't need to evaluate it just for the check.  */
+  if (TREE_SIDE_EFFECTS (gnu_expr))
+    gnu_result
+      = build2 (COMPOUND_EXPR, TREE_TYPE (gnu_expr), gnu_expr, gnu_result);
+  else
+    TREE_SIDE_EFFECTS (gnu_result) = 0;
+
+  /* ??? Unfortunately, if we don't put a SAVE_EXPR around this whole thing,
+     we will repeatedly do the test.  It would be nice if GCC was able
+     to optimize this and only do it once.  */
+  return save_expr (gnu_result);
+}
+
+/* Return an expression that converts GNU_EXPR to GNAT_TYPE, doing
+   overflow checks if OVERFLOW_P is nonzero and range checks if
+   RANGE_P is nonzero.  GNAT_TYPE is known to be an integral type.
+   If TRUNCATE_P is nonzero, do a float to integer conversion with
+   truncation; otherwise round.  */
+
+static tree
+convert_with_check (Entity_Id gnat_type, tree gnu_expr, bool overflowp,
+		    bool rangep, bool truncatep)
+{
+  tree gnu_type = get_unpadded_type (gnat_type);
+  tree gnu_in_type = TREE_TYPE (gnu_expr);
+  tree gnu_in_basetype = get_base_type (gnu_in_type);
+  tree gnu_base_type = get_base_type (gnu_type);
+  tree gnu_result = gnu_expr;
+
+  /* If we are not doing any checks, the output is an integral type, and
+     the input is not a floating type, just do the conversion.  This
+     shortcut is required to avoid problems with packed array types
+     and simplifies code in all cases anyway.   */
+  if (!rangep && !overflowp && INTEGRAL_TYPE_P (gnu_base_type)
+      && !FLOAT_TYPE_P (gnu_in_type))
+    return convert (gnu_type, gnu_expr);
+
+  /* First convert the expression to its base type.  This
+     will never generate code, but makes the tests below much simpler.
+     But don't do this if converting from an integer type to an unconstrained
+     array type since then we need to get the bounds from the original
+     (unpacked) type.  */
+  if (TREE_CODE (gnu_type) != UNCONSTRAINED_ARRAY_TYPE)
+    gnu_result = convert (gnu_in_basetype, gnu_result);
+
+  /* If overflow checks are requested,  we need to be sure the result will
+     fit in the output base type.  But don't do this if the input
+     is integer and the output floating-point.  */
+  if (overflowp
+      && !(FLOAT_TYPE_P (gnu_base_type) && INTEGRAL_TYPE_P (gnu_in_basetype)))
+    {
+      /* Ensure GNU_EXPR only gets evaluated once.  */
+      tree gnu_input = protect_multiple_eval (gnu_result);
+      tree gnu_cond = integer_zero_node;
+      tree gnu_in_lb = TYPE_MIN_VALUE (gnu_in_basetype);
+      tree gnu_in_ub = TYPE_MAX_VALUE (gnu_in_basetype);
+      tree gnu_out_lb = TYPE_MIN_VALUE (gnu_base_type);
+      tree gnu_out_ub = TYPE_MAX_VALUE (gnu_base_type);
+
+      /* Convert the lower bounds to signed types, so we're sure we're
+	 comparing them properly.  Likewise, convert the upper bounds
+	 to unsigned types.  */
+      if (INTEGRAL_TYPE_P (gnu_in_basetype) && TYPE_UNSIGNED (gnu_in_basetype))
+	gnu_in_lb = convert (gnat_signed_type (gnu_in_basetype), gnu_in_lb);
+
+      if (INTEGRAL_TYPE_P (gnu_in_basetype)
+	  && !TYPE_UNSIGNED (gnu_in_basetype))
+	gnu_in_ub = convert (gnat_unsigned_type (gnu_in_basetype), gnu_in_ub);
+
+      if (INTEGRAL_TYPE_P (gnu_base_type) && TYPE_UNSIGNED (gnu_base_type))
+	gnu_out_lb = convert (gnat_signed_type (gnu_base_type), gnu_out_lb);
+
+      if (INTEGRAL_TYPE_P (gnu_base_type) && !TYPE_UNSIGNED (gnu_base_type))
+	gnu_out_ub = convert (gnat_unsigned_type (gnu_base_type), gnu_out_ub);
+
+      /* Check each bound separately and only if the result bound
+	 is tighter than the bound on the input type.  Note that all the
+	 types are base types, so the bounds must be constant. Also,
+	 the comparison is done in the base type of the input, which
+	 always has the proper signedness.  First check for input
+	 integer (which means output integer), output float (which means
+	 both float), or mixed, in which case we always compare.
+	 Note that we have to do the comparison which would *fail* in the
+	 case of an error since if it's an FP comparison and one of the
+	 values is a NaN or Inf, the comparison will fail.  */
+      if (INTEGRAL_TYPE_P (gnu_in_basetype)
+	  ? tree_int_cst_lt (gnu_in_lb, gnu_out_lb)
+	  : (FLOAT_TYPE_P (gnu_base_type)
+	     ? REAL_VALUES_LESS (TREE_REAL_CST (gnu_in_lb),
+				 TREE_REAL_CST (gnu_out_lb))
+	     : 1))
+	gnu_cond
+	  = invert_truthvalue
+	    (build_binary_op (GE_EXPR, integer_type_node,
+			      gnu_input, convert (gnu_in_basetype,
+						  gnu_out_lb)));
+
+      if (INTEGRAL_TYPE_P (gnu_in_basetype)
+	  ? tree_int_cst_lt (gnu_out_ub, gnu_in_ub)
+	  : (FLOAT_TYPE_P (gnu_base_type)
+	     ? REAL_VALUES_LESS (TREE_REAL_CST (gnu_out_ub),
+				 TREE_REAL_CST (gnu_in_lb))
+	     : 1))
+	gnu_cond
+	  = build_binary_op (TRUTH_ORIF_EXPR, integer_type_node, gnu_cond,
+			     invert_truthvalue
+			     (build_binary_op (LE_EXPR, integer_type_node,
+					       gnu_input,
+					       convert (gnu_in_basetype,
+							gnu_out_ub))));
+
+      if (!integer_zerop (gnu_cond))
+	gnu_result = emit_check (gnu_cond, gnu_input,
+	                         CE_Overflow_Check_Failed);
+    }
+
+  /* Now convert to the result base type.  If this is a non-truncating
+     float-to-integer conversion, round.  */
+  if (INTEGRAL_TYPE_P (gnu_base_type) && FLOAT_TYPE_P (gnu_in_basetype)
+      && !truncatep)
+    {
+      REAL_VALUE_TYPE half_minus_pred_half, pred_half;
+      tree gnu_conv, gnu_zero, gnu_comp, gnu_saved_result, calc_type;
+      tree gnu_pred_half, gnu_add_pred_half, gnu_subtract_pred_half;
+      const struct real_format *fmt;
+
+      /* The following calculations depend on proper rounding to even
+         of each arithmetic operation. In order to prevent excess
+         precision from spoiling this property, use the widest hardware
+         floating-point type.
+
+         FIXME: For maximum efficiency, this should only be done for machines
+         and types where intermediates may have extra precision.  */
+
+      calc_type = longest_float_type_node;
+      /* FIXME: Should not have padding in the first place */
+      if (TREE_CODE (calc_type) == RECORD_TYPE
+              && TYPE_IS_PADDING_P (calc_type))
+        calc_type = TREE_TYPE (TYPE_FIELDS (calc_type));
+
+      /* Compute the exact value calc_type'Pred (0.5) at compile time. */
+      fmt = REAL_MODE_FORMAT (TYPE_MODE (calc_type));
+      real_2expN (&half_minus_pred_half, -(fmt->p) - 1, TYPE_MODE (calc_type));
+      REAL_ARITHMETIC (pred_half, MINUS_EXPR, dconsthalf,
+                       half_minus_pred_half);
+      gnu_pred_half = build_real (calc_type, pred_half);
+
+      /* If the input is strictly negative, subtract this value
+         and otherwise add it from the input. For 0.5, the result
+         is exactly between 1.0 and the machine number preceding 1.0
+         (for calc_type). Since the last bit of 1.0 is even, this 0.5
+         will round to 1.0, while all other number with an absolute
+         value less than 0.5 round to 0.0. For larger numbers exactly
+         halfway between integers, rounding will always be correct as
+         the true mathematical result will be closer to the higher
+         integer compared to the lower one. So, this constant works
+         for all floating-point numbers.
+
+         The reason to use the same constant with subtract/add instead
+         of a positive and negative constant is to allow the comparison
+         to be scheduled in parallel with retrieval of the constant and
+         conversion of the input to the calc_type (if necessary).
+      */
+
+      gnu_zero = convert (gnu_in_basetype, integer_zero_node);
+      gnu_saved_result = save_expr (gnu_result);
+      gnu_conv = convert (calc_type, gnu_saved_result);
+      gnu_comp = build2 (GE_EXPR, integer_type_node,
+	                gnu_saved_result, gnu_zero);
+      gnu_add_pred_half
+        = build2 (PLUS_EXPR, calc_type, gnu_conv, gnu_pred_half);
+      gnu_subtract_pred_half
+        = build2 (MINUS_EXPR, calc_type, gnu_conv, gnu_pred_half);
+      gnu_result = build3 (COND_EXPR, calc_type, gnu_comp,
+			   gnu_add_pred_half, gnu_subtract_pred_half);
+    }
+
+  if (TREE_CODE (gnu_base_type) == INTEGER_TYPE
+      && TYPE_HAS_ACTUAL_BOUNDS_P (gnu_base_type)
+      && TREE_CODE (gnu_result) == UNCONSTRAINED_ARRAY_REF)
+    gnu_result = unchecked_convert (gnu_base_type, gnu_result, false);
+  else
+    gnu_result = convert (gnu_base_type, gnu_result);
+
+  /* Finally, do the range check if requested.  Note that if the
+     result type is a modular type, the range check is actually
+     an overflow check.  */
+
+  if (rangep
+      || (TREE_CODE (gnu_base_type) == INTEGER_TYPE
+	  && TYPE_MODULAR_P (gnu_base_type) && overflowp))
+    gnu_result = emit_range_check (gnu_result, gnat_type);
+
+  return convert (gnu_type, gnu_result);
+}
+
+/* Return true if TYPE is a smaller packable version of RECORD_TYPE.  */
+
+static bool
+smaller_packable_type_p (tree type, tree record_type)
+{
+  tree size, rsize;
+
+  /* We're not interested in variants here.  */
+  if (TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (record_type))
+    return false;
+
+  /* Like a variant, a packable version keeps the original TYPE_NAME.  */
+  if (TYPE_NAME (type) != TYPE_NAME (record_type))
+    return false;
+
+  size = TYPE_SIZE (type);
+  rsize = TYPE_SIZE (record_type);
+
+  if (!(TREE_CODE (size) == INTEGER_CST && TREE_CODE (rsize) == INTEGER_CST))
+    return false;
+
+  return tree_int_cst_lt (size, rsize) != 0;
+}
+
+/* Return true if GNU_EXPR can be directly addressed.  This is the case
+   unless it is an expression involving computation or if it involves a
+   reference to a bitfield or to an object not sufficiently aligned for
+   its type.  If GNU_TYPE is non-null, return true only if GNU_EXPR can
+   be directly addressed as an object of this type.
+
+   *** Notes on addressability issues in the Ada compiler ***
+
+   This predicate is necessary in order to bridge the gap between Gigi
+   and the middle-end about addressability of GENERIC trees.  A tree
+   is said to be addressable if it can be directly addressed, i.e. if
+   its address can be taken, is a multiple of the type's alignment on
+   strict-alignment architectures and returns the first storage unit
+   assigned to the object represented by the tree.
+
+   In the C family of languages, everything is in practice addressable
+   at the language level, except for bit-fields.  This means that these
+   compilers will take the address of any tree that doesn't represent
+   a bit-field reference and expect the result to be the first storage
+   unit assigned to the object.  Even in cases where this will result
+   in unaligned accesses at run time, nothing is supposed to be done
+   and the program is considered as erroneous instead (see PR c/18287).
+
+   The implicit assumptions made in the middle-end are in keeping with
+   the C viewpoint described above:
+     - the address of a bit-field reference is supposed to be never
+       taken; the compiler (generally) will stop on such a construct,
+     - any other tree is addressable if it is formally addressable,
+       i.e. if it is formally allowed to be the operand of ADDR_EXPR.
+
+   In Ada, the viewpoint is the opposite one: nothing is addressable
+   at the language level unless explicitly declared so.  This means
+   that the compiler will both make sure that the trees representing
+   references to addressable ("aliased" in Ada parlance) objects are
+   addressable and make no real attempts at ensuring that the trees
+   representing references to non-addressable objects are addressable.
+
+   In the first case, Ada is effectively equivalent to C and handing
+   down the direct result of applying ADDR_EXPR to these trees to the
+   middle-end works flawlessly.  In the second case, Ada cannot afford
+   to consider the program as erroneous if the address of trees that
+   are not addressable is requested for technical reasons, unlike C;
+   as a consequence, the Ada compiler must arrange for either making
+   sure that this address is not requested in the middle-end or for
+   compensating by inserting temporaries if it is requested in Gigi.
+
+   The first goal can be achieved because the middle-end should not
+   request the address of non-addressable trees on its own; the only
+   exception is for the invocation of low-level block operations like
+   memcpy, for which the addressability requirements are lower since
+   the type's alignment can be disregarded.  In practice, this means
+   that Gigi must make sure that such operations cannot be applied to
+   non-BLKmode bit-fields.
+
+   The second goal is achieved by means of the addressable_p predicate
+   and by inserting SAVE_EXPRs around trees deemed non-addressable.
+   They will be turned during gimplification into proper temporaries
+   whose address will be used in lieu of that of the original tree.  */
+
+static bool
+addressable_p (tree gnu_expr, tree gnu_type)
+{
+  /* The size of the real type of the object must not be smaller than
+     that of the expected type, otherwise an indirect access in the
+     latter type would be larger than the object.  Only records need
+     to be considered in practice.  */
+  if (gnu_type
+      && TREE_CODE (gnu_type) == RECORD_TYPE
+      && smaller_packable_type_p (TREE_TYPE (gnu_expr), gnu_type))
+    return false;
+
+  switch (TREE_CODE (gnu_expr))
+    {
+    case VAR_DECL:
+    case PARM_DECL:
+    case FUNCTION_DECL:
+    case RESULT_DECL:
+      /* All DECLs are addressable: if they are in a register, we can force
+	 them to memory.  */
+      return true;
+
+    case UNCONSTRAINED_ARRAY_REF:
+    case INDIRECT_REF:
+    case CONSTRUCTOR:
+    case STRING_CST:
+    case INTEGER_CST:
+    case NULL_EXPR:
+    case SAVE_EXPR:
+    case CALL_EXPR:
+      return true;
+
+    case COND_EXPR:
+      /* We accept &COND_EXPR as soon as both operands are addressable and
+	 expect the outcome to be the address of the selected operand.  */
+      return (addressable_p (TREE_OPERAND (gnu_expr, 1), NULL_TREE)
+	      && addressable_p (TREE_OPERAND (gnu_expr, 2), NULL_TREE));
+
+    case COMPONENT_REF:
+      return (((!DECL_BIT_FIELD (TREE_OPERAND (gnu_expr, 1))
+		/* Even with DECL_BIT_FIELD cleared, we have to ensure that
+		   the field is sufficiently aligned, in case it is subject
+		   to a pragma Component_Alignment.  But we don't need to
+		   check the alignment of the containing record, as it is
+		   guaranteed to be not smaller than that of its most
+		   aligned field that is not a bit-field.  */
+	        && (!STRICT_ALIGNMENT
+		    || DECL_ALIGN (TREE_OPERAND (gnu_expr, 1))
+		       >= TYPE_ALIGN (TREE_TYPE (gnu_expr))))
+	       /* The field of a padding record is always addressable.  */
+	       || TYPE_IS_PADDING_P (TREE_TYPE (TREE_OPERAND (gnu_expr, 0))))
+	      && addressable_p (TREE_OPERAND (gnu_expr, 0), NULL_TREE));
+
+    case ARRAY_REF:  case ARRAY_RANGE_REF:
+    case REALPART_EXPR:  case IMAGPART_EXPR:
+    case NOP_EXPR:
+      return addressable_p (TREE_OPERAND (gnu_expr, 0), NULL_TREE);
+
+    case CONVERT_EXPR:
+      return (AGGREGATE_TYPE_P (TREE_TYPE (gnu_expr))
+	      && addressable_p (TREE_OPERAND (gnu_expr, 0), NULL_TREE));
+
+    case VIEW_CONVERT_EXPR:
+      {
+	/* This is addressable if we can avoid a copy.  */
+	tree type = TREE_TYPE (gnu_expr);
+	tree inner_type = TREE_TYPE (TREE_OPERAND (gnu_expr, 0));
+	return (((TYPE_MODE (type) == TYPE_MODE (inner_type)
+		  && (!STRICT_ALIGNMENT
+		      || TYPE_ALIGN (type) <= TYPE_ALIGN (inner_type)
+		      || TYPE_ALIGN (inner_type) >= BIGGEST_ALIGNMENT))
+		 || ((TYPE_MODE (type) == BLKmode
+		      || TYPE_MODE (inner_type) == BLKmode)
+		     && (!STRICT_ALIGNMENT
+			 || TYPE_ALIGN (type) <= TYPE_ALIGN (inner_type)
+			 || TYPE_ALIGN (inner_type) >= BIGGEST_ALIGNMENT
+			 || TYPE_ALIGN_OK (type)
+			 || TYPE_ALIGN_OK (inner_type))))
+		&& addressable_p (TREE_OPERAND (gnu_expr, 0), NULL_TREE));
+      }
+
+    default:
+      return false;
+    }
+}
+
+/* Do the processing for the declaration of a GNAT_ENTITY, a type.  If
+   a separate Freeze node exists, delay the bulk of the processing.  Otherwise
+   make a GCC type for GNAT_ENTITY and set up the correspondence.  */
+
+void
+process_type (Entity_Id gnat_entity)
+{
+  tree gnu_old
+    = present_gnu_tree (gnat_entity) ? get_gnu_tree (gnat_entity) : 0;
+  tree gnu_new;
+
+  /* If we are to delay elaboration of this type, just do any
+     elaborations needed for expressions within the declaration and
+     make a dummy type entry for this node and its Full_View (if
+     any) in case something points to it.  Don't do this if it
+     has already been done (the only way that can happen is if
+     the private completion is also delayed).  */
+  if (Present (Freeze_Node (gnat_entity))
+      || (IN (Ekind (gnat_entity), Incomplete_Or_Private_Kind)
+	  && Present (Full_View (gnat_entity))
+	  && Freeze_Node (Full_View (gnat_entity))
+	  && !present_gnu_tree (Full_View (gnat_entity))))
+    {
+      elaborate_entity (gnat_entity);
+
+      if (!gnu_old)
+        {
+	  tree gnu_decl = create_type_decl (get_entity_name (gnat_entity),
+					    make_dummy_type (gnat_entity),
+					    NULL, false, false, gnat_entity);
+
+	  save_gnu_tree (gnat_entity, gnu_decl, false);
+	  if (IN (Ekind (gnat_entity), Incomplete_Or_Private_Kind)
+	      && Present (Full_View (gnat_entity)))
+	    save_gnu_tree (Full_View (gnat_entity), gnu_decl, false);
+	}
+
+      return;
+    }
+
+  /* If we saved away a dummy type for this node it means that this
+     made the type that corresponds to the full type of an incomplete
+     type.  Clear that type for now and then update the type in the
+     pointers.  */
+  if (gnu_old)
+    {
+      gcc_assert (TREE_CODE (gnu_old) == TYPE_DECL
+		  && TYPE_IS_DUMMY_P (TREE_TYPE (gnu_old)));
+
+      save_gnu_tree (gnat_entity, NULL_TREE, false);
+    }
+
+  /* Now fully elaborate the type.  */
+  gnu_new = gnat_to_gnu_entity (gnat_entity, NULL_TREE, 1);
+  gcc_assert (TREE_CODE (gnu_new) == TYPE_DECL);
+
+  /* If we have an old type and we've made pointers to this type,
+     update those pointers.  */
+  if (gnu_old)
+    update_pointer_to (TYPE_MAIN_VARIANT (TREE_TYPE (gnu_old)),
+		       TREE_TYPE (gnu_new));
+
+  /* If this is a record type corresponding to a task or protected type
+     that is a completion of an incomplete type, perform a similar update
+     on the type.  */
+  /* ??? Including protected types here is a guess. */
+
+  if (IN (Ekind (gnat_entity), Record_Kind)
+      && Is_Concurrent_Record_Type (gnat_entity)
+      && present_gnu_tree (Corresponding_Concurrent_Type (gnat_entity)))
+    {
+      tree gnu_task_old
+	= get_gnu_tree (Corresponding_Concurrent_Type (gnat_entity));
+
+      save_gnu_tree (Corresponding_Concurrent_Type (gnat_entity),
+		     NULL_TREE, false);
+      save_gnu_tree (Corresponding_Concurrent_Type (gnat_entity),
+		     gnu_new, false);
+
+      update_pointer_to (TYPE_MAIN_VARIANT (TREE_TYPE (gnu_task_old)),
+			 TREE_TYPE (gnu_new));
+    }
+}
+
+/* GNAT_ENTITY is the type of the resulting constructors,
+   GNAT_ASSOC is the front of the Component_Associations of an N_Aggregate,
+   and GNU_TYPE is the GCC type of the corresponding record.
+
+   Return a CONSTRUCTOR to build the record.  */
+
+static tree
+assoc_to_constructor (Entity_Id gnat_entity, Node_Id gnat_assoc, tree gnu_type)
+{
+  tree gnu_list, gnu_result;
+
+  /* We test for GNU_FIELD being empty in the case where a variant
+     was the last thing since we don't take things off GNAT_ASSOC in
+     that case.  We check GNAT_ASSOC in case we have a variant, but it
+     has no fields.  */
+
+  for (gnu_list = NULL_TREE; Present (gnat_assoc);
+       gnat_assoc = Next (gnat_assoc))
+    {
+      Node_Id gnat_field = First (Choices (gnat_assoc));
+      tree gnu_field = gnat_to_gnu_field_decl (Entity (gnat_field));
+      tree gnu_expr = gnat_to_gnu (Expression (gnat_assoc));
+
+      /* The expander is supposed to put a single component selector name
+	 in every record component association */
+      gcc_assert (No (Next (gnat_field)));
+
+      /* Ignore fields that have Corresponding_Discriminants since we'll
+	 be setting that field in the parent.  */
+      if (Present (Corresponding_Discriminant (Entity (gnat_field)))
+	  && Is_Tagged_Type (Scope (Entity (gnat_field))))
+	continue;
+
+      /* Also ignore discriminants of Unchecked_Unions.  */
+      else if (Is_Unchecked_Union (gnat_entity)
+	       && Ekind (Entity (gnat_field)) == E_Discriminant)
+	continue;
+
+      /* Before assigning a value in an aggregate make sure range checks
+	 are done if required.  Then convert to the type of the field.  */
+      if (Do_Range_Check (Expression (gnat_assoc)))
+	gnu_expr = emit_range_check (gnu_expr, Etype (gnat_field));
+
+      gnu_expr = convert (TREE_TYPE (gnu_field), gnu_expr);
+
+      /* Add the field and expression to the list.  */
+      gnu_list = tree_cons (gnu_field, gnu_expr, gnu_list);
+    }
+
+  gnu_result = extract_values (gnu_list, gnu_type);
+
+#ifdef ENABLE_CHECKING
+  {
+    tree gnu_field;
+
+    /* Verify every entry in GNU_LIST was used.  */
+    for (gnu_field = gnu_list; gnu_field; gnu_field = TREE_CHAIN (gnu_field))
+      gcc_assert (TREE_ADDRESSABLE (gnu_field));
+  }
+#endif
+
+  return gnu_result;
+}
+
+/* Builds a possibly nested constructor for array aggregates. GNAT_EXPR
+   is the first element of an array aggregate. It may itself be an
+   aggregate (an array or record aggregate). GNU_ARRAY_TYPE is the gnu type
+   corresponding to the array aggregate. GNAT_COMPONENT_TYPE is the type
+   of the array component. It is needed for range checking. */
+
+static tree
+pos_to_constructor (Node_Id gnat_expr, tree gnu_array_type,
+                    Entity_Id gnat_component_type)
+{
+  tree gnu_expr_list = NULL_TREE;
+  tree gnu_index = TYPE_MIN_VALUE (TYPE_DOMAIN (gnu_array_type));
+  tree gnu_expr;
+
+  for ( ; Present (gnat_expr); gnat_expr = Next (gnat_expr))
+    {
+      /* If the expression is itself an array aggregate then first build the
+	 innermost constructor if it is part of our array (multi-dimensional
+	 case).  */
+
+      if (Nkind (gnat_expr) == N_Aggregate
+	  && TREE_CODE (TREE_TYPE (gnu_array_type)) == ARRAY_TYPE
+	  && TYPE_MULTI_ARRAY_P (TREE_TYPE (gnu_array_type)))
+	gnu_expr = pos_to_constructor (First (Expressions (gnat_expr)),
+				       TREE_TYPE (gnu_array_type),
+				       gnat_component_type);
+      else
+	{
+	  gnu_expr = gnat_to_gnu (gnat_expr);
+
+	  /* before assigning the element to the array make sure it is
+	     in range */
+	  if (Do_Range_Check (gnat_expr))
+	    gnu_expr = emit_range_check (gnu_expr, gnat_component_type);
+	}
+
+      gnu_expr_list
+	= tree_cons (gnu_index, convert (TREE_TYPE (gnu_array_type), gnu_expr),
+		     gnu_expr_list);
+
+      gnu_index = int_const_binop (PLUS_EXPR, gnu_index, integer_one_node, 0);
+    }
+
+  return gnat_build_constructor (gnu_array_type, nreverse (gnu_expr_list));
+}
+
+/* Subroutine of assoc_to_constructor: VALUES is a list of field associations,
+   some of which are from RECORD_TYPE.  Return a CONSTRUCTOR consisting
+   of the associations that are from RECORD_TYPE.  If we see an internal
+   record, make a recursive call to fill it in as well.  */
+
+static tree
+extract_values (tree values, tree record_type)
+{
+  tree result = NULL_TREE;
+  tree field, tem;
+
+  for (field = TYPE_FIELDS (record_type); field; field = TREE_CHAIN (field))
+    {
+      tree value = 0;
+
+      /* _Parent is an internal field, but may have values in the aggregate,
+	 so check for values first.  */
+      if ((tem = purpose_member (field, values)))
+	{
+	  value = TREE_VALUE (tem);
+	  TREE_ADDRESSABLE (tem) = 1;
+	}
+
+      else if (DECL_INTERNAL_P (field))
+	{
+	  value = extract_values (values, TREE_TYPE (field));
+	  if (TREE_CODE (value) == CONSTRUCTOR
+	      && VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (value)))
+	    value = 0;
+	}
+      else
+	/* If we have a record subtype, the names will match, but not the
+	   actual FIELD_DECLs.  */
+	for (tem = values; tem; tem = TREE_CHAIN (tem))
+	  if (DECL_NAME (TREE_PURPOSE (tem)) == DECL_NAME (field))
+	    {
+	      value = convert (TREE_TYPE (field), TREE_VALUE (tem));
+	      TREE_ADDRESSABLE (tem) = 1;
+	    }
+
+      if (!value)
+	continue;
+
+      result = tree_cons (field, value, result);
+    }
+
+  return gnat_build_constructor (record_type, nreverse (result));
+}
+
+/* EXP is to be treated as an array or record.  Handle the cases when it is
+   an access object and perform the required dereferences.  */
+
+static tree
+maybe_implicit_deref (tree exp)
+{
+  /* If the type is a pointer, dereference it.  */
+
+  if (POINTER_TYPE_P (TREE_TYPE (exp)) || TYPE_FAT_POINTER_P (TREE_TYPE (exp)))
+    exp = build_unary_op (INDIRECT_REF, NULL_TREE, exp);
+
+  /* If we got a padded type, remove it too.  */
+  if (TREE_CODE (TREE_TYPE (exp)) == RECORD_TYPE
+      && TYPE_IS_PADDING_P (TREE_TYPE (exp)))
+    exp = convert (TREE_TYPE (TYPE_FIELDS (TREE_TYPE (exp))), exp);
+
+  return exp;
+}
+
+/* Protect EXP from multiple evaluation.  This may make a SAVE_EXPR.  */
+
+tree
+protect_multiple_eval (tree exp)
+{
+  tree type = TREE_TYPE (exp);
+
+  /* If this has no side effects, we don't need to do anything.  */
+  if (!TREE_SIDE_EFFECTS (exp))
+    return exp;
+
+  /* If it is a conversion, protect what's inside the conversion.
+     Similarly, if we're indirectly referencing something, we only
+     actually need to protect the address since the data itself can't
+     change in these situations.  */
+  else if (TREE_CODE (exp) == NON_LVALUE_EXPR
+	   || CONVERT_EXPR_P (exp)
+	   || TREE_CODE (exp) == VIEW_CONVERT_EXPR
+	   || TREE_CODE (exp) == INDIRECT_REF
+	   || TREE_CODE (exp) == UNCONSTRAINED_ARRAY_REF)
+    return build1 (TREE_CODE (exp), type,
+		   protect_multiple_eval (TREE_OPERAND (exp, 0)));
+
+  /* If EXP is a fat pointer or something that can be placed into a register,
+     just make a SAVE_EXPR.  */
+  if (TYPE_FAT_POINTER_P (type) || TYPE_MODE (type) != BLKmode)
+    return save_expr (exp);
+
+  /* Otherwise, dereference, protect the address, and re-reference.  */
+  else
+    return
+      build_unary_op (INDIRECT_REF, type,
+		      save_expr (build_unary_op (ADDR_EXPR,
+						 build_reference_type (type),
+						 exp)));
+}
+
+/* This is equivalent to stabilize_reference in tree.c, but we know how to
+   handle our own nodes and we take extra arguments.  FORCE says whether to
+   force evaluation of everything.  We set SUCCESS to true unless we walk
+   through something we don't know how to stabilize.  */
+
+tree
+maybe_stabilize_reference (tree ref, bool force, bool *success)
+{
+  tree type = TREE_TYPE (ref);
+  enum tree_code code = TREE_CODE (ref);
+  tree result;
+
+  /* Assume we'll success unless proven otherwise.  */
+  *success = true;
+
+  switch (code)
+    {
+    case CONST_DECL:
+    case VAR_DECL:
+    case PARM_DECL:
+    case RESULT_DECL:
+      /* No action is needed in this case.  */
+      return ref;
+
+    case ADDR_EXPR:
+    CASE_CONVERT:
+    case FLOAT_EXPR:
+    case FIX_TRUNC_EXPR:
+    case VIEW_CONVERT_EXPR:
+      result
+	= build1 (code, type,
+		  maybe_stabilize_reference (TREE_OPERAND (ref, 0), force,
+					     success));
+      break;
+
+    case INDIRECT_REF:
+    case UNCONSTRAINED_ARRAY_REF:
+      result = build1 (code, type,
+		       gnat_stabilize_reference_1 (TREE_OPERAND (ref, 0),
+						   force));
+      break;
+
+    case COMPONENT_REF:
+     result = build3 (COMPONENT_REF, type,
+		      maybe_stabilize_reference (TREE_OPERAND (ref, 0), force,
+						 success),
+		      TREE_OPERAND (ref, 1), NULL_TREE);
+      break;
+
+    case BIT_FIELD_REF:
+      result = build3 (BIT_FIELD_REF, type,
+		       maybe_stabilize_reference (TREE_OPERAND (ref, 0), force,
+						  success),
+		       gnat_stabilize_reference_1 (TREE_OPERAND (ref, 1),
+						   force),
+		       gnat_stabilize_reference_1 (TREE_OPERAND (ref, 2),
+						   force));
+      break;
+
+    case ARRAY_REF:
+    case ARRAY_RANGE_REF:
+      result = build4 (code, type,
+		       maybe_stabilize_reference (TREE_OPERAND (ref, 0), force,
+						  success),
+		       gnat_stabilize_reference_1 (TREE_OPERAND (ref, 1),
+						   force),
+		       NULL_TREE, NULL_TREE);
+      break;
+
+    case COMPOUND_EXPR:
+      result = gnat_stabilize_reference_1 (ref, force);
+      break;
+
+    case CALL_EXPR:
+      /* This generates better code than the scheme in protect_multiple_eval
+	 because large objects will be returned via invisible reference in
+	 most ABIs so the temporary will directly be filled by the callee.  */
+      result = gnat_stabilize_reference_1 (ref, force);
+      break;
+
+    case CONSTRUCTOR:
+      /* Constructors with 1 element are used extensively to formally
+	 convert objects to special wrapping types.  */
+      if (TREE_CODE (type) == RECORD_TYPE
+	  && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (ref)) == 1)
+	{
+	  tree index
+	    = VEC_index (constructor_elt, CONSTRUCTOR_ELTS (ref), 0)->index;
+	  tree value
+	    = VEC_index (constructor_elt, CONSTRUCTOR_ELTS (ref), 0)->value;
+	  result
+	    = build_constructor_single (type, index,
+					gnat_stabilize_reference_1 (value,
+								    force));
+	}
+      else
+	{
+	  *success = false;
+	  return ref;
+	}
+      break;
+
+    case ERROR_MARK:
+      ref = error_mark_node;
+
+      /* ...  Fallthru to failure ... */
+
+      /* If arg isn't a kind of lvalue we recognize, make no change.
+	 Caller should recognize the error for an invalid lvalue.  */
+    default:
+      *success = false;
+      return ref;
+    }
+
+  TREE_READONLY (result) = TREE_READONLY (ref);
+
+  /* TREE_THIS_VOLATILE and TREE_SIDE_EFFECTS attached to the initial
+     expression may not be sustained across some paths, such as the way via
+     build1 for INDIRECT_REF.  We re-populate those flags here for the general
+     case, which is consistent with the GCC version of this routine.
+
+     Special care should be taken regarding TREE_SIDE_EFFECTS, because some
+     paths introduce side effects where there was none initially (e.g. calls
+     to save_expr), and we also want to keep track of that.  */
+
+  TREE_THIS_VOLATILE (result) = TREE_THIS_VOLATILE (ref);
+  TREE_SIDE_EFFECTS (result) |= TREE_SIDE_EFFECTS (ref);
+
+  return result;
+}
+
+/* Wrapper around maybe_stabilize_reference, for common uses without
+   lvalue restrictions and without need to examine the success
+   indication.  */
+
+static tree
+gnat_stabilize_reference (tree ref, bool force)
+{
+  bool dummy;
+  return maybe_stabilize_reference (ref, force, &dummy);
+}
+
+/* Similar to stabilize_reference_1 in tree.c, but supports an extra
+   arg to force a SAVE_EXPR for everything.  */
+
+static tree
+gnat_stabilize_reference_1 (tree e, bool force)
+{
+  enum tree_code code = TREE_CODE (e);
+  tree type = TREE_TYPE (e);
+  tree result;
+
+  /* We cannot ignore const expressions because it might be a reference
+     to a const array but whose index contains side-effects.  But we can
+     ignore things that are actual constant or that already have been
+     handled by this function.  */
+
+  if (TREE_CONSTANT (e) || code == SAVE_EXPR)
+    return e;
+
+  switch (TREE_CODE_CLASS (code))
+    {
+    case tcc_exceptional:
+    case tcc_type:
+    case tcc_declaration:
+    case tcc_comparison:
+    case tcc_statement:
+    case tcc_expression:
+    case tcc_reference:
+    case tcc_vl_exp:
+      /* If this is a COMPONENT_REF of a fat pointer, save the entire
+	 fat pointer.  This may be more efficient, but will also allow
+	 us to more easily find the match for the PLACEHOLDER_EXPR.  */
+      if (code == COMPONENT_REF
+	  && TYPE_FAT_POINTER_P (TREE_TYPE (TREE_OPERAND (e, 0))))
+	result = build3 (COMPONENT_REF, type,
+			 gnat_stabilize_reference_1 (TREE_OPERAND (e, 0),
+						     force),
+			 TREE_OPERAND (e, 1), TREE_OPERAND (e, 2));
+      else if (TREE_SIDE_EFFECTS (e) || force)
+	return save_expr (e);
+      else
+	return e;
+      break;
+
+    case tcc_constant:
+      /* Constants need no processing.  In fact, we should never reach
+	 here.  */
+      return e;
+
+    case tcc_binary:
+      /* Recursively stabilize each operand.  */
+      result = build2 (code, type,
+		       gnat_stabilize_reference_1 (TREE_OPERAND (e, 0), force),
+		       gnat_stabilize_reference_1 (TREE_OPERAND (e, 1),
+						   force));
+      break;
+
+    case tcc_unary:
+      /* Recursively stabilize each operand.  */
+      result = build1 (code, type,
+		       gnat_stabilize_reference_1 (TREE_OPERAND (e, 0),
+						   force));
+      break;
+
+    default:
+      gcc_unreachable ();
+    }
+
+  TREE_READONLY (result) = TREE_READONLY (e);
+
+  TREE_THIS_VOLATILE (result) = TREE_THIS_VOLATILE (e);
+  TREE_SIDE_EFFECTS (result) |= TREE_SIDE_EFFECTS (e);
+  return result;
+}
+
+/* Convert SLOC into LOCUS.  Return true if SLOC corresponds to a source code
+   location and false if it doesn't.  In the former case, set the Gigi global
+   variable REF_FILENAME to the simple debug file name as given by sinput.  */
+
+bool
+Sloc_to_locus (Source_Ptr Sloc, location_t *locus)
+{
+  if (Sloc == No_Location)
+    return false;
+
+  if (Sloc <= Standard_Location)
+    {
+      if (*locus == UNKNOWN_LOCATION)
+	*locus = BUILTINS_LOCATION;
+      return false;
+    }
+  else
+    {
+      Source_File_Index file = Get_Source_File_Index (Sloc);
+      Logical_Line_Number line = Get_Logical_Line_Number (Sloc);
+      Column_Number column = Get_Column_Number (Sloc);
+      struct line_map *map = &line_table->maps[file - 1];
+
+      /* Translate the location according to the line-map.h formula.  */
+      *locus = map->start_location
+		+ ((line - map->to_line) << map->column_bits)
+		+ (column & ((1 << map->column_bits) - 1));
+    }
+
+  ref_filename
+    = IDENTIFIER_POINTER
+      (get_identifier
+       (Get_Name_String (Debug_Source_Name (Get_Source_File_Index (Sloc)))));;
+
+  return true;
+}
+
+/* Similar to set_expr_location, but start with the Sloc of GNAT_NODE and
+   don't do anything if it doesn't correspond to a source location.  */
+
+static void
+set_expr_location_from_node (tree node, Node_Id gnat_node)
+{
+  location_t locus;
+
+  if (!Sloc_to_locus (Sloc (gnat_node), &locus))
+    return;
+
+  SET_EXPR_LOCATION (node, locus);
+}
+
+/* Return a colon-separated list of encodings contained in encoded Ada
+   name.  */
+
+static const char *
+extract_encoding (const char *name)
+{
+  char *encoding = GGC_NEWVEC (char, strlen (name));
+  
+  get_encoding (name, encoding);
+  
+  return encoding;
+}
+
+/* Extract the Ada name from an encoded name.  */
+
+static const char *
+decode_name (const char *name)
+{
+  char *decoded = GGC_NEWVEC (char, strlen (name) * 2 + 60);
+  
+  __gnat_decode (name, decoded, 0);
+  
+  return decoded;
+}
+
+/* Post an error message.  MSG is the error message, properly annotated.
+   NODE is the node at which to post the error and the node to use for the
+   "&" substitution.  */
+
+void
+post_error (const char *msg, Node_Id node)
+{
+  String_Template temp;
+  Fat_Pointer fp;
+
+  temp.Low_Bound = 1, temp.High_Bound = strlen (msg);
+  fp.Array = msg, fp.Bounds = &temp;
+  if (Present (node))
+    Error_Msg_N (fp, node);
+}
+
+/* Similar, but NODE is the node at which to post the error and ENT
+   is the node to use for the "&" substitution.  */
+
+void
+post_error_ne (const char *msg, Node_Id node, Entity_Id ent)
+{
+  String_Template temp;
+  Fat_Pointer fp;
+
+  temp.Low_Bound = 1, temp.High_Bound = strlen (msg);
+  fp.Array = msg, fp.Bounds = &temp;
+  if (Present (node))
+    Error_Msg_NE (fp, node, ent);
+}
+
+/* Similar, but NODE is the node at which to post the error, ENT is the node
+   to use for the "&" substitution, and N is the number to use for the ^.  */
+
+void
+post_error_ne_num (const char *msg, Node_Id node, Entity_Id ent, int n)
+{
+  String_Template temp;
+  Fat_Pointer fp;
+
+  temp.Low_Bound = 1, temp.High_Bound = strlen (msg);
+  fp.Array = msg, fp.Bounds = &temp;
+  Error_Msg_Uint_1 = UI_From_Int (n);
+
+  if (Present (node))
+    Error_Msg_NE (fp, node, ent);
+}
+
+/* Similar to post_error_ne_num, but T is a GCC tree representing the
+   number to write.  If the tree represents a constant that fits within
+   a host integer, the text inside curly brackets in MSG will be output
+   (presumably including a '^').  Otherwise that text will not be output
+   and the text inside square brackets will be output instead.  */
+
+void
+post_error_ne_tree (const char *msg, Node_Id node, Entity_Id ent, tree t)
+{
+  char *newmsg = XALLOCAVEC (char, strlen (msg) + 1);
+  String_Template temp = {1, 0};
+  Fat_Pointer fp;
+  char start_yes, end_yes, start_no, end_no;
+  const char *p;
+  char *q;
+
+  fp.Array = newmsg, fp.Bounds = &temp;
+
+  if (host_integerp (t, 1)
+#if HOST_BITS_PER_WIDE_INT > HOST_BITS_PER_INT
+      &&
+      compare_tree_int
+      (t, (((unsigned HOST_WIDE_INT) 1 << (HOST_BITS_PER_INT - 1)) - 1)) < 0
+#endif
+      )
+    {
+      Error_Msg_Uint_1 = UI_From_Int (tree_low_cst (t, 1));
+      start_yes = '{', end_yes = '}', start_no = '[', end_no = ']';
+    }
+  else
+    start_yes = '[', end_yes = ']', start_no = '{', end_no = '}';
+
+  for (p = msg, q = newmsg; *p; p++)
+    {
+      if (*p == start_yes)
+	for (p++; *p != end_yes; p++)
+	  *q++ = *p;
+      else if (*p == start_no)
+	for (p++; *p != end_no; p++)
+	  ;
+      else
+	*q++ = *p;
+    }
+
+  *q = 0;
+
+  temp.High_Bound = strlen (newmsg);
+  if (Present (node))
+    Error_Msg_NE (fp, node, ent);
+}
+
+/* Similar to post_error_ne_tree, except that NUM is a second
+   integer to write in the message.  */
+
+void
+post_error_ne_tree_2 (const char *msg,
+                      Node_Id node,
+                      Entity_Id ent,
+                      tree t,
+                      int num)
+{
+  Error_Msg_Uint_2 = UI_From_Int (num);
+  post_error_ne_tree (msg, node, ent, t);
+}
+
+/* Initialize the table that maps GNAT codes to GCC codes for simple
+   binary and unary operations.  */
+
+static void
+init_code_table (void)
+{
+  gnu_codes[N_And_Then] = TRUTH_ANDIF_EXPR;
+  gnu_codes[N_Or_Else] = TRUTH_ORIF_EXPR;
+
+  gnu_codes[N_Op_And] = TRUTH_AND_EXPR;
+  gnu_codes[N_Op_Or] = TRUTH_OR_EXPR;
+  gnu_codes[N_Op_Xor] = TRUTH_XOR_EXPR;
+  gnu_codes[N_Op_Eq] = EQ_EXPR;
+  gnu_codes[N_Op_Ne] = NE_EXPR;
+  gnu_codes[N_Op_Lt] = LT_EXPR;
+  gnu_codes[N_Op_Le] = LE_EXPR;
+  gnu_codes[N_Op_Gt] = GT_EXPR;
+  gnu_codes[N_Op_Ge] = GE_EXPR;
+  gnu_codes[N_Op_Add] = PLUS_EXPR;
+  gnu_codes[N_Op_Subtract] = MINUS_EXPR;
+  gnu_codes[N_Op_Multiply] = MULT_EXPR;
+  gnu_codes[N_Op_Mod] = FLOOR_MOD_EXPR;
+  gnu_codes[N_Op_Rem] = TRUNC_MOD_EXPR;
+  gnu_codes[N_Op_Minus] = NEGATE_EXPR;
+  gnu_codes[N_Op_Abs] = ABS_EXPR;
+  gnu_codes[N_Op_Not] = TRUTH_NOT_EXPR;
+  gnu_codes[N_Op_Rotate_Left] = LROTATE_EXPR;
+  gnu_codes[N_Op_Rotate_Right] = RROTATE_EXPR;
+  gnu_codes[N_Op_Shift_Left] = LSHIFT_EXPR;
+  gnu_codes[N_Op_Shift_Right] = RSHIFT_EXPR;
+  gnu_codes[N_Op_Shift_Right_Arithmetic] = RSHIFT_EXPR;
+}
+
+/* Return a label to branch to for the exception type in KIND or NULL_TREE
+   if none.  */
+
+tree
+get_exception_label (char kind)
+{
+  if (kind == N_Raise_Constraint_Error)
+    return TREE_VALUE (gnu_constraint_error_label_stack);
+  else if (kind == N_Raise_Storage_Error)
+    return TREE_VALUE (gnu_storage_error_label_stack);
+  else if (kind == N_Raise_Program_Error)
+    return TREE_VALUE (gnu_program_error_label_stack);
+  else
+    return NULL_TREE;
+}
+
+#include "gt-ada-trans.h"
diff --git a/gcc/ada/gcc-interface/utils.c b/gcc/ada/gcc-interface/utils.c
new file mode 100644
index 00000000000..4188d38831e
--- /dev/null
+++ b/gcc/ada/gcc-interface/utils.c
@@ -0,0 +1,4895 @@
+/****************************************************************************
+ *                                                                          *
+ *                         GNAT COMPILER COMPONENTS                         *
+ *                                                                          *
+ *                                U T I L S                                 *
+ *                                                                          *
+ *                          C Implementation File                           *
+ *                                                                          *
+ *          Copyright (C) 1992-2008, Free Software Foundation, Inc.         *
+ *                                                                          *
+ * GNAT is free software;  you can  redistribute it  and/or modify it under *
+ * terms of the  GNU General Public License as published  by the Free Soft- *
+ * ware  Foundation;  either version 3,  or (at your option) any later ver- *
+ * sion.  GNAT is distributed in the hope that it will be useful, but WITH- *
+ * OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY *
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License *
+ * for  more details.  You should have received a copy of the GNU General   *
+ * Public License along with GCC; see the file COPYING3.  If not see        *
+ * <http://www.gnu.org/licenses/>.                                          *
+ *                                                                          *
+ * GNAT was originally developed  by the GNAT team at  New York University. *
+ * Extensive contributions were provided by Ada Core Technologies Inc.      *
+ *                                                                          *
+ ****************************************************************************/
+
+/* We have attribute handlers using C specific format specifiers in warning
+   messages.  Make sure they are properly recognized.  */
+#define GCC_DIAG_STYLE __gcc_cdiag__
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
+#include "tree.h"
+#include "flags.h"
+#include "defaults.h"
+#include "toplev.h"
+#include "output.h"
+#include "ggc.h"
+#include "debug.h"
+#include "convert.h"
+#include "target.h"
+#include "function.h"
+#include "cgraph.h"
+#include "tree-inline.h"
+#include "tree-iterator.h"
+#include "gimple.h"
+#include "tree-dump.h"
+#include "pointer-set.h"
+#include "langhooks.h"
+
+#include "ada.h"
+#include "types.h"
+#include "atree.h"
+#include "elists.h"
+#include "namet.h"
+#include "nlists.h"
+#include "stringt.h"
+#include "uintp.h"
+#include "fe.h"
+#include "sinfo.h"
+#include "einfo.h"
+#include "ada-tree.h"
+#include "gigi.h"
+
+#ifndef MAX_FIXED_MODE_SIZE
+#define MAX_FIXED_MODE_SIZE GET_MODE_BITSIZE (DImode)
+#endif
+
+#ifndef MAX_BITS_PER_WORD
+#define MAX_BITS_PER_WORD  BITS_PER_WORD
+#endif
+
+/* If nonzero, pretend we are allocating at global level.  */
+int force_global;
+
+/* Tree nodes for the various types and decls we create.  */
+tree gnat_std_decls[(int) ADT_LAST];
+
+/* Functions to call for each of the possible raise reasons.  */
+tree gnat_raise_decls[(int) LAST_REASON_CODE + 1];
+
+/* Forward declarations for handlers of attributes.  */
+static tree handle_const_attribute (tree *, tree, tree, int, bool *);
+static tree handle_nothrow_attribute (tree *, tree, tree, int, bool *);
+static tree handle_pure_attribute (tree *, tree, tree, int, bool *);
+static tree handle_novops_attribute (tree *, tree, tree, int, bool *);
+static tree handle_nonnull_attribute (tree *, tree, tree, int, bool *);
+static tree handle_sentinel_attribute (tree *, tree, tree, int, bool *);
+static tree handle_noreturn_attribute (tree *, tree, tree, int, bool *);
+static tree handle_malloc_attribute (tree *, tree, tree, int, bool *);
+static tree handle_type_generic_attribute (tree *, tree, tree, int, bool *);
+
+/* Fake handler for attributes we don't properly support, typically because
+   they'd require dragging a lot of the common-c front-end circuitry.  */
+static tree fake_attribute_handler      (tree *, tree, tree, int, bool *);
+
+/* Table of machine-independent internal attributes for Ada.  We support
+   this minimal set of attributes to accommodate the needs of builtins.  */
+const struct attribute_spec gnat_internal_attribute_table[] =
+{
+  /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler } */
+  { "const",        0, 0,  true,  false, false, handle_const_attribute   },
+  { "nothrow",      0, 0,  true,  false, false, handle_nothrow_attribute },
+  { "pure",         0, 0,  true,  false, false, handle_pure_attribute },
+  { "no vops",      0, 0,  true,  false, false, handle_novops_attribute },
+  { "nonnull",      0, -1, false, true,  true,  handle_nonnull_attribute },
+  { "sentinel",     0, 1,  false, true,  true,  handle_sentinel_attribute },
+  { "noreturn",     0, 0,  true,  false, false, handle_noreturn_attribute },
+  { "malloc",       0, 0,  true,  false, false, handle_malloc_attribute },
+  { "type generic", 0, 0, false, true, true, handle_type_generic_attribute },
+
+  /* ??? format and format_arg are heavy and not supported, which actually
+     prevents support for stdio builtins, which we however declare as part
+     of the common builtins.def contents.  */
+  { "format",     3, 3,  false, true,  true,  fake_attribute_handler },
+  { "format_arg", 1, 1,  false, true,  true,  fake_attribute_handler },
+
+  { NULL,         0, 0, false, false, false, NULL }
+};
+
+/* Associates a GNAT tree node to a GCC tree node. It is used in
+   `save_gnu_tree', `get_gnu_tree' and `present_gnu_tree'. See documentation
+   of `save_gnu_tree' for more info.  */
+static GTY((length ("max_gnat_nodes"))) tree *associate_gnat_to_gnu;
+
+#define GET_GNU_TREE(GNAT_ENTITY)	\
+  associate_gnat_to_gnu[(GNAT_ENTITY) - First_Node_Id]
+
+#define SET_GNU_TREE(GNAT_ENTITY,VAL)	\
+  associate_gnat_to_gnu[(GNAT_ENTITY) - First_Node_Id] = (VAL)
+
+#define PRESENT_GNU_TREE(GNAT_ENTITY)	\
+  (associate_gnat_to_gnu[(GNAT_ENTITY) - First_Node_Id] != NULL_TREE)
+
+/* Associates a GNAT entity to a GCC tree node used as a dummy, if any.  */
+static GTY((length ("max_gnat_nodes"))) tree *dummy_node_table;
+
+#define GET_DUMMY_NODE(GNAT_ENTITY)	\
+  dummy_node_table[(GNAT_ENTITY) - First_Node_Id]
+
+#define SET_DUMMY_NODE(GNAT_ENTITY,VAL)	\
+  dummy_node_table[(GNAT_ENTITY) - First_Node_Id] = (VAL)
+
+#define PRESENT_DUMMY_NODE(GNAT_ENTITY)	\
+  (dummy_node_table[(GNAT_ENTITY) - First_Node_Id] != NULL_TREE)
+
+/* This variable keeps a table for types for each precision so that we only
+   allocate each of them once. Signed and unsigned types are kept separate.
+
+   Note that these types are only used when fold-const requests something
+   special.  Perhaps we should NOT share these types; we'll see how it
+   goes later.  */
+static GTY(()) tree signed_and_unsigned_types[2 * MAX_BITS_PER_WORD + 1][2];
+
+/* Likewise for float types, but record these by mode.  */
+static GTY(()) tree float_types[NUM_MACHINE_MODES];
+
+/* For each binding contour we allocate a binding_level structure to indicate
+   the binding depth.  */
+
+struct gnat_binding_level GTY((chain_next ("%h.chain")))
+{
+  /* The binding level containing this one (the enclosing binding level). */
+  struct gnat_binding_level *chain;
+  /* The BLOCK node for this level.  */
+  tree block;
+  /* If nonzero, the setjmp buffer that needs to be updated for any
+     variable-sized definition within this context.  */
+  tree jmpbuf_decl;
+};
+
+/* The binding level currently in effect.  */
+static GTY(()) struct gnat_binding_level *current_binding_level;
+
+/* A chain of gnat_binding_level structures awaiting reuse.  */
+static GTY((deletable)) struct gnat_binding_level *free_binding_level;
+
+/* An array of global declarations.  */
+static GTY(()) VEC(tree,gc) *global_decls;
+
+/* An array of builtin function declarations.  */
+static GTY(()) VEC(tree,gc) *builtin_decls;
+
+/* An array of global renaming pointers.  */
+static GTY(()) VEC(tree,gc) *global_renaming_pointers;
+
+/* A chain of unused BLOCK nodes. */
+static GTY((deletable)) tree free_block_chain;
+
+static void gnat_install_builtins (void);
+static tree merge_sizes (tree, tree, tree, bool, bool);
+static tree compute_related_constant (tree, tree);
+static tree split_plus (tree, tree *);
+static void gnat_gimplify_function (tree);
+static tree float_type_for_precision (int, enum machine_mode);
+static tree convert_to_fat_pointer (tree, tree);
+static tree convert_to_thin_pointer (tree, tree);
+static tree make_descriptor_field (const char *,tree, tree, tree);
+static bool potential_alignment_gap (tree, tree, tree);
+
+/* Initialize the association of GNAT nodes to GCC trees.  */
+
+void
+init_gnat_to_gnu (void)
+{
+  associate_gnat_to_gnu
+    = (tree *) ggc_alloc_cleared (max_gnat_nodes * sizeof (tree));
+}
+
+/* GNAT_ENTITY is a GNAT tree node for an entity.   GNU_DECL is the GCC tree
+   which is to be associated with GNAT_ENTITY. Such GCC tree node is always
+   a ..._DECL node.  If NO_CHECK is nonzero, the latter check is suppressed.
+
+   If GNU_DECL is zero, a previous association is to be reset.  */
+
+void
+save_gnu_tree (Entity_Id gnat_entity, tree gnu_decl, bool no_check)
+{
+  /* Check that GNAT_ENTITY is not already defined and that it is being set
+     to something which is a decl.  Raise gigi 401 if not.  Usually, this
+     means GNAT_ENTITY is defined twice, but occasionally is due to some
+     Gigi problem.  */
+  gcc_assert (!(gnu_decl
+		&& (PRESENT_GNU_TREE (gnat_entity)
+		    || (!no_check && !DECL_P (gnu_decl)))));
+
+  SET_GNU_TREE (gnat_entity, gnu_decl);
+}
+
+/* GNAT_ENTITY is a GNAT tree node for a defining identifier.
+   Return the ..._DECL node that was associated with it.  If there is no tree
+   node associated with GNAT_ENTITY, abort.
+
+   In some cases, such as delayed elaboration or expressions that need to
+   be elaborated only once, GNAT_ENTITY is really not an entity.  */
+
+tree
+get_gnu_tree (Entity_Id gnat_entity)
+{
+  gcc_assert (PRESENT_GNU_TREE (gnat_entity));
+  return GET_GNU_TREE (gnat_entity);
+}
+
+/* Return nonzero if a GCC tree has been associated with GNAT_ENTITY.  */
+
+bool
+present_gnu_tree (Entity_Id gnat_entity)
+{
+  return PRESENT_GNU_TREE (gnat_entity);
+}
+
+/* Initialize the association of GNAT nodes to GCC trees as dummies.  */
+
+void
+init_dummy_type (void)
+{
+  dummy_node_table
+    = (tree *) ggc_alloc_cleared (max_gnat_nodes * sizeof (tree));
+}
+
+/* Make a dummy type corresponding to GNAT_TYPE.  */
+
+tree
+make_dummy_type (Entity_Id gnat_type)
+{
+  Entity_Id gnat_underlying = Gigi_Equivalent_Type (gnat_type);
+  tree gnu_type;
+
+  /* If there is an equivalent type, get its underlying type.  */
+  if (Present (gnat_underlying))
+    gnat_underlying = Underlying_Type (gnat_underlying);
+
+  /* If there was no equivalent type (can only happen when just annotating
+     types) or underlying type, go back to the original type.  */
+  if (No (gnat_underlying))
+    gnat_underlying = gnat_type;
+
+  /* If it there already a dummy type, use that one.  Else make one.  */
+  if (PRESENT_DUMMY_NODE (gnat_underlying))
+    return GET_DUMMY_NODE (gnat_underlying);
+
+  /* If this is a record, make a RECORD_TYPE or UNION_TYPE; else make
+     an ENUMERAL_TYPE.  */
+  gnu_type = make_node (Is_Record_Type (gnat_underlying)
+			? tree_code_for_record_type (gnat_underlying)
+			: ENUMERAL_TYPE);
+  TYPE_NAME (gnu_type) = get_entity_name (gnat_type);
+  TYPE_DUMMY_P (gnu_type) = 1;
+  if (AGGREGATE_TYPE_P (gnu_type))
+    {
+      TYPE_STUB_DECL (gnu_type) = build_decl (TYPE_DECL, NULL_TREE, gnu_type);
+      TYPE_BY_REFERENCE_P (gnu_type) = Is_By_Reference_Type (gnat_type);
+    }
+
+  SET_DUMMY_NODE (gnat_underlying, gnu_type);
+
+  return gnu_type;
+}
+
+/* Return nonzero if we are currently in the global binding level.  */
+
+int
+global_bindings_p (void)
+{
+  return ((force_global || !current_function_decl) ? -1 : 0);
+}
+
+/* Enter a new binding level. */
+
+void
+gnat_pushlevel ()
+{
+  struct gnat_binding_level *newlevel = NULL;
+
+  /* Reuse a struct for this binding level, if there is one.  */
+  if (free_binding_level)
+    {
+      newlevel = free_binding_level;
+      free_binding_level = free_binding_level->chain;
+    }
+  else
+    newlevel
+      = (struct gnat_binding_level *)
+	ggc_alloc (sizeof (struct gnat_binding_level));
+
+  /* Use a free BLOCK, if any; otherwise, allocate one.  */
+  if (free_block_chain)
+    {
+      newlevel->block = free_block_chain;
+      free_block_chain = BLOCK_CHAIN (free_block_chain);
+      BLOCK_CHAIN (newlevel->block) = NULL_TREE;
+    }
+  else
+    newlevel->block = make_node (BLOCK);
+
+  /* Point the BLOCK we just made to its parent.  */
+  if (current_binding_level)
+    BLOCK_SUPERCONTEXT (newlevel->block) = current_binding_level->block;
+
+  BLOCK_VARS (newlevel->block) = BLOCK_SUBBLOCKS (newlevel->block) = NULL_TREE;
+  TREE_USED (newlevel->block) = 1;
+
+  /* Add this level to the front of the chain (stack) of levels that are
+     active.  */
+  newlevel->chain = current_binding_level;
+  newlevel->jmpbuf_decl = NULL_TREE;
+  current_binding_level = newlevel;
+}
+
+/* Set SUPERCONTEXT of the BLOCK for the current binding level to FNDECL
+   and point FNDECL to this BLOCK.  */
+
+void
+set_current_block_context (tree fndecl)
+{
+  BLOCK_SUPERCONTEXT (current_binding_level->block) = fndecl;
+  DECL_INITIAL (fndecl) = current_binding_level->block;
+}
+
+/* Set the jmpbuf_decl for the current binding level to DECL.  */
+
+void
+set_block_jmpbuf_decl (tree decl)
+{
+  current_binding_level->jmpbuf_decl = decl;
+}
+
+/* Get the jmpbuf_decl, if any, for the current binding level.  */
+
+tree
+get_block_jmpbuf_decl ()
+{
+  return current_binding_level->jmpbuf_decl;
+}
+
+/* Exit a binding level. Set any BLOCK into the current code group.  */
+
+void
+gnat_poplevel ()
+{
+  struct gnat_binding_level *level = current_binding_level;
+  tree block = level->block;
+
+  BLOCK_VARS (block) = nreverse (BLOCK_VARS (block));
+  BLOCK_SUBBLOCKS (block) = nreverse (BLOCK_SUBBLOCKS (block));
+
+  /* If this is a function-level BLOCK don't do anything.  Otherwise, if there
+     are no variables free the block and merge its subblocks into those of its
+     parent block. Otherwise, add it to the list of its parent.  */
+  if (TREE_CODE (BLOCK_SUPERCONTEXT (block)) == FUNCTION_DECL)
+    ;
+  else if (BLOCK_VARS (block) == NULL_TREE)
+    {
+      BLOCK_SUBBLOCKS (level->chain->block)
+	= chainon (BLOCK_SUBBLOCKS (block),
+		   BLOCK_SUBBLOCKS (level->chain->block));
+      BLOCK_CHAIN (block) = free_block_chain;
+      free_block_chain = block;
+    }
+  else
+    {
+      BLOCK_CHAIN (block) = BLOCK_SUBBLOCKS (level->chain->block);
+      BLOCK_SUBBLOCKS (level->chain->block) = block;
+      TREE_USED (block) = 1;
+      set_block_for_group (block);
+    }
+
+  /* Free this binding structure.  */
+  current_binding_level = level->chain;
+  level->chain = free_binding_level;
+  free_binding_level = level;
+}
+
+
+/* Records a ..._DECL node DECL as belonging to the current lexical scope
+   and uses GNAT_NODE for location information and propagating flags.  */
+
+void
+gnat_pushdecl (tree decl, Node_Id gnat_node)
+{
+  /* If this decl is public external or at toplevel, there is no context.
+     But PARM_DECLs always go in the level of its function.  */
+  if (TREE_CODE (decl) != PARM_DECL
+      && ((DECL_EXTERNAL (decl) && TREE_PUBLIC (decl))
+	  || global_bindings_p ()))
+    DECL_CONTEXT (decl) = 0;
+  else
+    {
+      DECL_CONTEXT (decl) = current_function_decl;
+
+      /* Functions imported in another function are not really nested.  */
+      if (TREE_CODE (decl) == FUNCTION_DECL && TREE_PUBLIC (decl))
+	DECL_NO_STATIC_CHAIN (decl) = 1;
+    }
+
+  TREE_NO_WARNING (decl) = (gnat_node == Empty || Warnings_Off (gnat_node));
+
+  /* Set the location of DECL and emit a declaration for it.  */
+  if (Present (gnat_node))
+    Sloc_to_locus (Sloc (gnat_node), &DECL_SOURCE_LOCATION (decl));
+  add_decl_expr (decl, gnat_node);
+
+  /* Put the declaration on the list.  The list of declarations is in reverse
+     order.  The list will be reversed later.  Put global variables in the
+     globals list and builtin functions in a dedicated list to speed up
+     further lookups.  Don't put TYPE_DECLs for UNCONSTRAINED_ARRAY_TYPE into
+     the list, as they will cause trouble with the debugger and aren't needed
+     anyway.  */
+  if (TREE_CODE (decl) != TYPE_DECL
+      || TREE_CODE (TREE_TYPE (decl)) != UNCONSTRAINED_ARRAY_TYPE)
+    {
+      if (global_bindings_p ())
+	{
+	  VEC_safe_push (tree, gc, global_decls, decl);
+
+	  if (TREE_CODE (decl) == FUNCTION_DECL && DECL_BUILT_IN (decl))
+	    VEC_safe_push (tree, gc, builtin_decls, decl);
+	}
+      else
+	{
+	  TREE_CHAIN (decl) = BLOCK_VARS (current_binding_level->block);
+	  BLOCK_VARS (current_binding_level->block) = decl;
+	}
+    }
+
+  /* For the declaration of a type, set its name if it either is not already
+     set, was set to an IDENTIFIER_NODE, indicating an internal name,
+     or if the previous type name was not derived from a source name.
+     We'd rather have the type named with a real name and all the pointer
+     types to the same object have the same POINTER_TYPE node.  Code in the
+     equivalent function of c-decl.c makes a copy of the type node here, but
+     that may cause us trouble with incomplete types.  We make an exception
+     for fat pointer types because the compiler automatically builds them
+     for unconstrained array types and the debugger uses them to represent
+     both these and pointers to these.  */
+  if (TREE_CODE (decl) == TYPE_DECL && DECL_NAME (decl))
+    {
+      tree t = TREE_TYPE (decl);
+
+      if (!TYPE_NAME (t) || TREE_CODE (TYPE_NAME (t)) == IDENTIFIER_NODE)
+	;
+      else if (TYPE_FAT_POINTER_P (t))
+	{
+	  tree tt = build_variant_type_copy (t);
+	  TYPE_NAME (tt) = decl;
+	  TREE_USED (tt) = TREE_USED (t);
+	  TREE_TYPE (decl) = tt;
+	  DECL_ORIGINAL_TYPE (decl) = t;
+	  t = NULL_TREE;
+	}
+      else if (DECL_ARTIFICIAL (TYPE_NAME (t)) && !DECL_ARTIFICIAL (decl))
+	;
+      else
+	t = NULL_TREE;
+
+      /* Propagate the name to all the variants.  This is needed for
+	 the type qualifiers machinery to work properly.  */
+      if (t)
+	for (t = TYPE_MAIN_VARIANT (t); t; t = TYPE_NEXT_VARIANT (t))
+	  TYPE_NAME (t) = decl;
+    }
+}
+
+/* Do little here.  Set up the standard declarations later after the
+   front end has been run.  */
+
+void
+gnat_init_decl_processing (void)
+{
+  /* Make the binding_level structure for global names.  */
+  current_function_decl = 0;
+  current_binding_level = 0;
+  free_binding_level = 0;
+  gnat_pushlevel ();
+
+  build_common_tree_nodes (true, true);
+
+  /* In Ada, we use a signed type for SIZETYPE.  Use the signed type
+     corresponding to the size of Pmode.  In most cases when ptr_mode and
+     Pmode differ, C will use the width of ptr_mode as sizetype.  But we get
+     far better code using the width of Pmode.  Make this here since we need
+     this before we can expand the GNAT types.  */
+  size_type_node = gnat_type_for_size (GET_MODE_BITSIZE (Pmode), 0);
+  set_sizetype (size_type_node);
+  build_common_tree_nodes_2 (0);
+
+  ptr_void_type_node = build_pointer_type (void_type_node);
+}
+
+/* Create the predefined scalar types such as `integer_type_node' needed
+   in the gcc back-end and initialize the global binding level.  */
+
+void
+init_gigi_decls (tree long_long_float_type, tree exception_type)
+{
+  tree endlink, decl;
+  unsigned int i;
+
+  /* Set the types that GCC and Gigi use from the front end.  We would like
+     to do this for char_type_node, but it needs to correspond to the C
+     char type.  */
+  if (TREE_CODE (TREE_TYPE (long_long_float_type)) == INTEGER_TYPE)
+    {
+      /* In this case, the builtin floating point types are VAX float,
+	 so make up a type for use.  */
+      longest_float_type_node = make_node (REAL_TYPE);
+      TYPE_PRECISION (longest_float_type_node) = LONG_DOUBLE_TYPE_SIZE;
+      layout_type (longest_float_type_node);
+      create_type_decl (get_identifier ("longest float type"),
+			longest_float_type_node, NULL, false, true, Empty);
+    }
+  else
+    longest_float_type_node = TREE_TYPE (long_long_float_type);
+
+  except_type_node = TREE_TYPE (exception_type);
+
+  unsigned_type_node = gnat_type_for_size (INT_TYPE_SIZE, 1);
+  create_type_decl (get_identifier ("unsigned int"), unsigned_type_node,
+		    NULL, false, true, Empty);
+
+  void_type_decl_node = create_type_decl (get_identifier ("void"),
+					  void_type_node, NULL, false, true,
+					  Empty);
+
+  void_ftype = build_function_type (void_type_node, NULL_TREE);
+  ptr_void_ftype = build_pointer_type (void_ftype);
+
+  /* Build the special descriptor type and its null node if needed.  */
+  if (TARGET_VTABLE_USES_DESCRIPTORS)
+    {
+      tree field_list = NULL_TREE, null_list = NULL_TREE;
+      int j;
+
+      fdesc_type_node = make_node (RECORD_TYPE);
+
+      for (j = 0; j < TARGET_VTABLE_USES_DESCRIPTORS; j++)
+	{
+	  tree field = create_field_decl (NULL_TREE, ptr_void_ftype,
+					  fdesc_type_node, 0, 0, 0, 1);
+	  TREE_CHAIN (field) = field_list;
+	  field_list = field;
+	  null_list = tree_cons (field, null_pointer_node, null_list);
+	}
+
+      finish_record_type (fdesc_type_node, nreverse (field_list), 0, false);
+      null_fdesc_node = gnat_build_constructor (fdesc_type_node, null_list);
+    }
+
+  /* Now declare runtime functions. */
+  endlink = tree_cons (NULL_TREE, void_type_node, NULL_TREE);
+
+  /* malloc is a function declaration tree for a function to allocate
+     memory.  */
+  malloc_decl = create_subprog_decl (get_identifier ("__gnat_malloc"),
+				     NULL_TREE,
+				     build_function_type (ptr_void_type_node,
+							  tree_cons (NULL_TREE,
+								     sizetype,
+								     endlink)),
+				     NULL_TREE, false, true, true, NULL,
+				     Empty);
+  DECL_IS_MALLOC (malloc_decl) = 1;
+
+  /* malloc32 is a function declaration tree for a function to allocate
+     32bit memory on a 64bit system. Needed only on 64bit VMS.  */
+  malloc32_decl = create_subprog_decl (get_identifier ("__gnat_malloc32"),
+				     NULL_TREE,
+				     build_function_type (ptr_void_type_node,
+							  tree_cons (NULL_TREE,
+								     sizetype,
+								     endlink)),
+				     NULL_TREE, false, true, true, NULL,
+				     Empty);
+  DECL_IS_MALLOC (malloc32_decl) = 1;
+
+  /* free is a function declaration tree for a function to free memory.  */
+  free_decl
+    = create_subprog_decl (get_identifier ("__gnat_free"), NULL_TREE,
+			   build_function_type (void_type_node,
+						tree_cons (NULL_TREE,
+							   ptr_void_type_node,
+							   endlink)),
+			   NULL_TREE, false, true, true, NULL, Empty);
+
+  /* Make the types and functions used for exception processing.    */
+  jmpbuf_type
+    = build_array_type (gnat_type_for_mode (Pmode, 0),
+			build_index_type (build_int_cst (NULL_TREE, 5)));
+  create_type_decl (get_identifier ("JMPBUF_T"), jmpbuf_type, NULL,
+		    true, true, Empty);
+  jmpbuf_ptr_type = build_pointer_type (jmpbuf_type);
+
+  /* Functions to get and set the jumpbuf pointer for the current thread.  */
+  get_jmpbuf_decl
+    = create_subprog_decl
+    (get_identifier ("system__soft_links__get_jmpbuf_address_soft"),
+     NULL_TREE, build_function_type (jmpbuf_ptr_type, NULL_TREE),
+     NULL_TREE, false, true, true, NULL, Empty);
+  /* Avoid creating superfluous edges to __builtin_setjmp receivers.  */
+  DECL_PURE_P (get_jmpbuf_decl) = 1;
+
+  set_jmpbuf_decl
+    = create_subprog_decl
+    (get_identifier ("system__soft_links__set_jmpbuf_address_soft"),
+     NULL_TREE,
+     build_function_type (void_type_node,
+			  tree_cons (NULL_TREE, jmpbuf_ptr_type, endlink)),
+     NULL_TREE, false, true, true, NULL, Empty);
+
+  /* Function to get the current exception.  */
+  get_excptr_decl
+    = create_subprog_decl
+    (get_identifier ("system__soft_links__get_gnat_exception"),
+     NULL_TREE,
+     build_function_type (build_pointer_type (except_type_node), NULL_TREE),
+     NULL_TREE, false, true, true, NULL, Empty);
+  /* Avoid creating superfluous edges to __builtin_setjmp receivers.  */
+  DECL_PURE_P (get_excptr_decl) = 1;
+
+  /* Functions that raise exceptions. */
+  raise_nodefer_decl
+    = create_subprog_decl
+      (get_identifier ("__gnat_raise_nodefer_with_msg"), NULL_TREE,
+       build_function_type (void_type_node,
+			    tree_cons (NULL_TREE,
+				       build_pointer_type (except_type_node),
+				       endlink)),
+       NULL_TREE, false, true, true, NULL, Empty);
+
+  /* Dummy objects to materialize "others" and "all others" in the exception
+     tables.  These are exported by a-exexpr.adb, so see this unit for the
+     types to use.  */
+
+  others_decl
+    = create_var_decl (get_identifier ("OTHERS"),
+		       get_identifier ("__gnat_others_value"),
+		       integer_type_node, 0, 1, 0, 1, 1, 0, Empty);
+
+  all_others_decl
+    = create_var_decl (get_identifier ("ALL_OTHERS"),
+		       get_identifier ("__gnat_all_others_value"),
+		       integer_type_node, 0, 1, 0, 1, 1, 0, Empty);
+
+  /* Hooks to call when entering/leaving an exception handler.  */
+  begin_handler_decl
+    = create_subprog_decl (get_identifier ("__gnat_begin_handler"), NULL_TREE,
+			   build_function_type (void_type_node,
+						tree_cons (NULL_TREE,
+							   ptr_void_type_node,
+							   endlink)),
+			   NULL_TREE, false, true, true, NULL, Empty);
+
+  end_handler_decl
+    = create_subprog_decl (get_identifier ("__gnat_end_handler"), NULL_TREE,
+			   build_function_type (void_type_node,
+						tree_cons (NULL_TREE,
+							   ptr_void_type_node,
+							   endlink)),
+			   NULL_TREE, false, true, true, NULL, Empty);
+
+  /* If in no exception handlers mode, all raise statements are redirected to
+     __gnat_last_chance_handler. No need to redefine raise_nodefer_decl, since
+     this procedure will never be called in this mode.  */
+  if (No_Exception_Handlers_Set ())
+    {
+      decl
+	= create_subprog_decl
+	  (get_identifier ("__gnat_last_chance_handler"), NULL_TREE,
+	   build_function_type (void_type_node,
+				tree_cons (NULL_TREE,
+					   build_pointer_type (char_type_node),
+					   tree_cons (NULL_TREE,
+						      integer_type_node,
+						      endlink))),
+	   NULL_TREE, false, true, true, NULL, Empty);
+
+      for (i = 0; i < ARRAY_SIZE (gnat_raise_decls); i++)
+	gnat_raise_decls[i] = decl;
+    }
+  else
+    /* Otherwise, make one decl for each exception reason.  */
+    for (i = 0; i < ARRAY_SIZE (gnat_raise_decls); i++)
+      {
+	char name[17];
+
+	sprintf (name, "__gnat_rcheck_%.2d", i);
+	gnat_raise_decls[i]
+	  = create_subprog_decl
+	    (get_identifier (name), NULL_TREE,
+	     build_function_type (void_type_node,
+				  tree_cons (NULL_TREE,
+					     build_pointer_type
+					     (char_type_node),
+					     tree_cons (NULL_TREE,
+							integer_type_node,
+							endlink))),
+	     NULL_TREE, false, true, true, NULL, Empty);
+      }
+
+  /* Indicate that these never return.  */
+  TREE_THIS_VOLATILE (raise_nodefer_decl) = 1;
+  TREE_SIDE_EFFECTS (raise_nodefer_decl) = 1;
+  TREE_TYPE (raise_nodefer_decl)
+    = build_qualified_type (TREE_TYPE (raise_nodefer_decl),
+			    TYPE_QUAL_VOLATILE);
+
+  for (i = 0; i < ARRAY_SIZE (gnat_raise_decls); i++)
+    {
+      TREE_THIS_VOLATILE (gnat_raise_decls[i]) = 1;
+      TREE_SIDE_EFFECTS (gnat_raise_decls[i]) = 1;
+      TREE_TYPE (gnat_raise_decls[i])
+	= build_qualified_type (TREE_TYPE (gnat_raise_decls[i]),
+				TYPE_QUAL_VOLATILE);
+    }
+
+  /* setjmp returns an integer and has one operand, which is a pointer to
+     a jmpbuf.  */
+  setjmp_decl
+    = create_subprog_decl
+      (get_identifier ("__builtin_setjmp"), NULL_TREE,
+       build_function_type (integer_type_node,
+			    tree_cons (NULL_TREE,  jmpbuf_ptr_type, endlink)),
+       NULL_TREE, false, true, true, NULL, Empty);
+
+  DECL_BUILT_IN_CLASS (setjmp_decl) = BUILT_IN_NORMAL;
+  DECL_FUNCTION_CODE (setjmp_decl) = BUILT_IN_SETJMP;
+
+  /* update_setjmp_buf updates a setjmp buffer from the current stack pointer
+     address.  */
+  update_setjmp_buf_decl
+    = create_subprog_decl
+      (get_identifier ("__builtin_update_setjmp_buf"), NULL_TREE,
+       build_function_type (void_type_node,
+			    tree_cons (NULL_TREE,  jmpbuf_ptr_type, endlink)),
+       NULL_TREE, false, true, true, NULL, Empty);
+
+  DECL_BUILT_IN_CLASS (update_setjmp_buf_decl) = BUILT_IN_NORMAL;
+  DECL_FUNCTION_CODE (update_setjmp_buf_decl) = BUILT_IN_UPDATE_SETJMP_BUF;
+
+  main_identifier_node = get_identifier ("main");
+
+  /* Install the builtins we might need, either internally or as
+     user available facilities for Intrinsic imports.  */
+  gnat_install_builtins ();
+}
+
+/* Given a record type RECORD_TYPE and a chain of FIELD_DECL nodes FIELDLIST,
+   finish constructing the record or union type.  If REP_LEVEL is zero, this
+   record has no representation clause and so will be entirely laid out here.
+   If REP_LEVEL is one, this record has a representation clause and has been
+   laid out already; only set the sizes and alignment.  If REP_LEVEL is two,
+   this record is derived from a parent record and thus inherits its layout;
+   only make a pass on the fields to finalize them.  If DO_NOT_FINALIZE is
+   true, the record type is expected to be modified afterwards so it will
+   not be sent to the back-end for finalization.  */
+
+void
+finish_record_type (tree record_type, tree fieldlist, int rep_level,
+		    bool do_not_finalize)
+{
+  enum tree_code code = TREE_CODE (record_type);
+  tree name = TYPE_NAME (record_type);
+  tree ada_size = bitsize_zero_node;
+  tree size = bitsize_zero_node;
+  bool had_size = TYPE_SIZE (record_type) != 0;
+  bool had_size_unit = TYPE_SIZE_UNIT (record_type) != 0;
+  bool had_align = TYPE_ALIGN (record_type) != 0;
+  tree field;
+
+  if (name && TREE_CODE (name) == TYPE_DECL)
+    name = DECL_NAME (name);
+
+  TYPE_FIELDS (record_type) = fieldlist;
+  TYPE_STUB_DECL (record_type) = build_decl (TYPE_DECL, name, record_type);
+
+  /* We don't need both the typedef name and the record name output in
+     the debugging information, since they are the same.  */
+  DECL_ARTIFICIAL (TYPE_STUB_DECL (record_type)) = 1;
+
+  /* Globally initialize the record first.  If this is a rep'ed record,
+     that just means some initializations; otherwise, layout the record.  */
+  if (rep_level > 0)
+    {
+      TYPE_ALIGN (record_type) = MAX (BITS_PER_UNIT, TYPE_ALIGN (record_type));
+      TYPE_MODE (record_type) = BLKmode;
+
+      if (!had_size_unit)
+	TYPE_SIZE_UNIT (record_type) = size_zero_node;
+      if (!had_size)
+	TYPE_SIZE (record_type) = bitsize_zero_node;
+
+      /* For all-repped records with a size specified, lay the QUAL_UNION_TYPE
+	 out just like a UNION_TYPE, since the size will be fixed.  */
+      else if (code == QUAL_UNION_TYPE)
+	code = UNION_TYPE;
+    }
+  else
+    {
+      /* Ensure there isn't a size already set.  There can be in an error
+	 case where there is a rep clause but all fields have errors and
+	 no longer have a position.  */
+      TYPE_SIZE (record_type) = 0;
+      layout_type (record_type);
+    }
+
+  /* At this point, the position and size of each field is known.  It was
+     either set before entry by a rep clause, or by laying out the type above.
+
+     We now run a pass over the fields (in reverse order for QUAL_UNION_TYPEs)
+     to compute the Ada size; the GCC size and alignment (for rep'ed records
+     that are not padding types); and the mode (for rep'ed records).  We also
+     clear the DECL_BIT_FIELD indication for the cases we know have not been
+     handled yet, and adjust DECL_NONADDRESSABLE_P accordingly.  */
+
+  if (code == QUAL_UNION_TYPE)
+    fieldlist = nreverse (fieldlist);
+
+  for (field = fieldlist; field; field = TREE_CHAIN (field))
+    {
+      tree type = TREE_TYPE (field);
+      tree pos = bit_position (field);
+      tree this_size = DECL_SIZE (field);
+      tree this_ada_size;
+
+      if ((TREE_CODE (type) == RECORD_TYPE
+	   || TREE_CODE (type) == UNION_TYPE
+	   || TREE_CODE (type) == QUAL_UNION_TYPE)
+	  && !TYPE_IS_FAT_POINTER_P (type)
+	  && !TYPE_CONTAINS_TEMPLATE_P (type)
+	  && TYPE_ADA_SIZE (type))
+	this_ada_size = TYPE_ADA_SIZE (type);
+      else
+	this_ada_size = this_size;
+
+      /* Clear DECL_BIT_FIELD for the cases layout_decl does not handle.  */
+      if (DECL_BIT_FIELD (field)
+	  && operand_equal_p (this_size, TYPE_SIZE (type), 0))
+	{
+	  unsigned int align = TYPE_ALIGN (type);
+
+	  /* In the general case, type alignment is required.  */
+	  if (value_factor_p (pos, align))
+	    {
+	      /* The enclosing record type must be sufficiently aligned.
+		 Otherwise, if no alignment was specified for it and it
+		 has been laid out already, bump its alignment to the
+		 desired one if this is compatible with its size.  */
+	      if (TYPE_ALIGN (record_type) >= align)
+		{
+		  DECL_ALIGN (field) = MAX (DECL_ALIGN (field), align);
+		  DECL_BIT_FIELD (field) = 0;
+		}
+	      else if (!had_align
+		       && rep_level == 0
+		       && value_factor_p (TYPE_SIZE (record_type), align))
+		{
+		  TYPE_ALIGN (record_type) = align;
+		  DECL_ALIGN (field) = MAX (DECL_ALIGN (field), align);
+		  DECL_BIT_FIELD (field) = 0;
+		}
+	    }
+
+	  /* In the non-strict alignment case, only byte alignment is.  */
+	  if (!STRICT_ALIGNMENT
+	      && DECL_BIT_FIELD (field)
+	      && value_factor_p (pos, BITS_PER_UNIT))
+	    DECL_BIT_FIELD (field) = 0;
+	}
+
+      /* If we still have DECL_BIT_FIELD set at this point, we know the field
+	 is technically not addressable.  Except that it can actually be
+	 addressed if the field is BLKmode and happens to be properly
+	 aligned.  */
+      DECL_NONADDRESSABLE_P (field)
+	|= DECL_BIT_FIELD (field) && DECL_MODE (field) != BLKmode;
+
+      /* A type must be as aligned as its most aligned field that is not
+	 a bit-field.  But this is already enforced by layout_type.  */
+      if (rep_level > 0 && !DECL_BIT_FIELD (field))
+	TYPE_ALIGN (record_type)
+	  = MAX (TYPE_ALIGN (record_type), DECL_ALIGN (field));
+
+      switch (code)
+	{
+	case UNION_TYPE:
+	  ada_size = size_binop (MAX_EXPR, ada_size, this_ada_size);
+	  size = size_binop (MAX_EXPR, size, this_size);
+	  break;
+
+	case QUAL_UNION_TYPE:
+	  ada_size
+	    = fold_build3 (COND_EXPR, bitsizetype, DECL_QUALIFIER (field),
+			   this_ada_size, ada_size);
+	  size = fold_build3 (COND_EXPR, bitsizetype, DECL_QUALIFIER (field),
+			      this_size, size);
+	  break;
+
+	case RECORD_TYPE:
+	  /* Since we know here that all fields are sorted in order of
+	     increasing bit position, the size of the record is one
+	     higher than the ending bit of the last field processed
+	     unless we have a rep clause, since in that case we might
+	     have a field outside a QUAL_UNION_TYPE that has a higher ending
+	     position.  So use a MAX in that case.  Also, if this field is a
+	     QUAL_UNION_TYPE, we need to take into account the previous size in
+	     the case of empty variants.  */
+	  ada_size
+	    = merge_sizes (ada_size, pos, this_ada_size,
+			   TREE_CODE (type) == QUAL_UNION_TYPE, rep_level > 0);
+	  size
+	    = merge_sizes (size, pos, this_size,
+			   TREE_CODE (type) == QUAL_UNION_TYPE, rep_level > 0);
+	  break;
+
+	default:
+	  gcc_unreachable ();
+	}
+    }
+
+  if (code == QUAL_UNION_TYPE)
+    nreverse (fieldlist);
+
+  if (rep_level < 2)
+    {
+      /* If this is a padding record, we never want to make the size smaller
+	 than what was specified in it, if any.  */
+      if (TREE_CODE (record_type) == RECORD_TYPE
+	  && TYPE_IS_PADDING_P (record_type) && TYPE_SIZE (record_type))
+	size = TYPE_SIZE (record_type);
+
+      /* Now set any of the values we've just computed that apply.  */
+      if (!TYPE_IS_FAT_POINTER_P (record_type)
+	  && !TYPE_CONTAINS_TEMPLATE_P (record_type))
+	SET_TYPE_ADA_SIZE (record_type, ada_size);
+
+      if (rep_level > 0)
+	{
+	  tree size_unit = had_size_unit
+			   ? TYPE_SIZE_UNIT (record_type)
+			   : convert (sizetype,
+				      size_binop (CEIL_DIV_EXPR, size,
+						  bitsize_unit_node));
+	  unsigned int align = TYPE_ALIGN (record_type);
+
+	  TYPE_SIZE (record_type) = variable_size (round_up (size, align));
+	  TYPE_SIZE_UNIT (record_type)
+	    = variable_size (round_up (size_unit, align / BITS_PER_UNIT));
+
+	  compute_record_mode (record_type);
+	}
+    }
+
+  if (!do_not_finalize)
+    rest_of_record_type_compilation (record_type);
+}
+
+/* Wrap up compilation of RECORD_TYPE, i.e. most notably output all
+   the debug information associated with it.  It need not be invoked
+   directly in most cases since finish_record_type takes care of doing
+   so, unless explicitly requested not to through DO_NOT_FINALIZE.  */
+
+void
+rest_of_record_type_compilation (tree record_type)
+{
+  tree fieldlist = TYPE_FIELDS (record_type);
+  tree field;
+  enum tree_code code = TREE_CODE (record_type);
+  bool var_size = false;
+
+  for (field = fieldlist; field; field = TREE_CHAIN (field))
+    {
+      /* We need to make an XVE/XVU record if any field has variable size,
+	 whether or not the record does.  For example, if we have a union,
+	 it may be that all fields, rounded up to the alignment, have the
+	 same size, in which case we'll use that size.  But the debug
+	 output routines (except Dwarf2) won't be able to output the fields,
+	 so we need to make the special record.  */
+      if (TREE_CODE (DECL_SIZE (field)) != INTEGER_CST
+	  /* If a field has a non-constant qualifier, the record will have
+	     variable size too.  */
+	  || (code == QUAL_UNION_TYPE
+	      && TREE_CODE (DECL_QUALIFIER (field)) != INTEGER_CST))
+	{
+	  var_size = true;
+	  break;
+	}
+    }
+
+  /* If this record is of variable size, rename it so that the
+     debugger knows it is and make a new, parallel, record
+     that tells the debugger how the record is laid out.  See
+     exp_dbug.ads.  But don't do this for records that are padding
+     since they confuse GDB.  */
+  if (var_size
+      && !(TREE_CODE (record_type) == RECORD_TYPE
+	   && TYPE_IS_PADDING_P (record_type)))
+    {
+      tree new_record_type
+	= make_node (TREE_CODE (record_type) == QUAL_UNION_TYPE
+		     ? UNION_TYPE : TREE_CODE (record_type));
+      tree orig_name = TYPE_NAME (record_type);
+      tree orig_id
+	= (TREE_CODE (orig_name) == TYPE_DECL ? DECL_NAME (orig_name)
+	   : orig_name);
+      tree new_id
+	= concat_id_with_name (orig_id,
+			       TREE_CODE (record_type) == QUAL_UNION_TYPE
+			       ? "XVU" : "XVE");
+      tree last_pos = bitsize_zero_node;
+      tree old_field;
+      tree prev_old_field = 0;
+
+      TYPE_NAME (new_record_type) = new_id;
+      TYPE_ALIGN (new_record_type) = BIGGEST_ALIGNMENT;
+      TYPE_STUB_DECL (new_record_type)
+	= build_decl (TYPE_DECL, new_id, new_record_type);
+      DECL_ARTIFICIAL (TYPE_STUB_DECL (new_record_type)) = 1;
+      DECL_IGNORED_P (TYPE_STUB_DECL (new_record_type))
+	= DECL_IGNORED_P (TYPE_STUB_DECL (record_type));
+      TYPE_SIZE (new_record_type) = size_int (TYPE_ALIGN (record_type));
+      TYPE_SIZE_UNIT (new_record_type)
+	= size_int (TYPE_ALIGN (record_type) / BITS_PER_UNIT);
+
+      add_parallel_type (TYPE_STUB_DECL (record_type), new_record_type);
+
+      /* Now scan all the fields, replacing each field with a new
+	 field corresponding to the new encoding.  */
+      for (old_field = TYPE_FIELDS (record_type); old_field;
+	   old_field = TREE_CHAIN (old_field))
+	{
+	  tree field_type = TREE_TYPE (old_field);
+	  tree field_name = DECL_NAME (old_field);
+	  tree new_field;
+	  tree curpos = bit_position (old_field);
+	  bool var = false;
+	  unsigned int align = 0;
+	  tree pos;
+
+	  /* See how the position was modified from the last position.
+
+	  There are two basic cases we support: a value was added
+	  to the last position or the last position was rounded to
+	  a boundary and they something was added.  Check for the
+	  first case first.  If not, see if there is any evidence
+	  of rounding.  If so, round the last position and try
+	  again.
+
+	  If this is a union, the position can be taken as zero. */
+
+	  /* Some computations depend on the shape of the position expression,
+	     so strip conversions to make sure it's exposed.  */
+	  curpos = remove_conversions (curpos, true);
+
+	  if (TREE_CODE (new_record_type) == UNION_TYPE)
+	    pos = bitsize_zero_node, align = 0;
+	  else
+	    pos = compute_related_constant (curpos, last_pos);
+
+	  if (!pos && TREE_CODE (curpos) == MULT_EXPR
+	      && host_integerp (TREE_OPERAND (curpos, 1), 1))
+	    {
+	      tree offset = TREE_OPERAND (curpos, 0);
+	      align = tree_low_cst (TREE_OPERAND (curpos, 1), 1);
+
+	      /* An offset which is a bitwise AND with a negative power of 2
+		 means an alignment corresponding to this power of 2.  */
+	      offset = remove_conversions (offset, true);
+	      if (TREE_CODE (offset) == BIT_AND_EXPR
+		  && host_integerp (TREE_OPERAND (offset, 1), 0)
+		  && tree_int_cst_sgn (TREE_OPERAND (offset, 1)) < 0)
+		{
+		  unsigned int pow
+		    = - tree_low_cst (TREE_OPERAND (offset, 1), 0);
+		  if (exact_log2 (pow) > 0)
+		    align *= pow;
+		}
+
+	      pos = compute_related_constant (curpos,
+					      round_up (last_pos, align));
+	    }
+	  else if (!pos && TREE_CODE (curpos) == PLUS_EXPR
+		   && TREE_CODE (TREE_OPERAND (curpos, 1)) == INTEGER_CST
+		   && TREE_CODE (TREE_OPERAND (curpos, 0)) == MULT_EXPR
+		   && host_integerp (TREE_OPERAND
+				     (TREE_OPERAND (curpos, 0), 1),
+				     1))
+	    {
+	      align
+		= tree_low_cst
+		(TREE_OPERAND (TREE_OPERAND (curpos, 0), 1), 1);
+	      pos = compute_related_constant (curpos,
+					      round_up (last_pos, align));
+	    }
+	  else if (potential_alignment_gap (prev_old_field, old_field,
+					    pos))
+	    {
+	      align = TYPE_ALIGN (field_type);
+	      pos = compute_related_constant (curpos,
+					      round_up (last_pos, align));
+	    }
+
+	  /* If we can't compute a position, set it to zero.
+
+	  ??? We really should abort here, but it's too much work
+	  to get this correct for all cases.  */
+
+	  if (!pos)
+	    pos = bitsize_zero_node;
+
+	  /* See if this type is variable-sized and make a pointer type
+	     and indicate the indirection if so.  Beware that the debug
+	     back-end may adjust the position computed above according
+	     to the alignment of the field type, i.e. the pointer type
+	     in this case, if we don't preventively counter that.  */
+	  if (TREE_CODE (DECL_SIZE (old_field)) != INTEGER_CST)
+	    {
+	      field_type = build_pointer_type (field_type);
+	      if (align != 0 && TYPE_ALIGN (field_type) > align)
+		{
+		  field_type = copy_node (field_type);
+		  TYPE_ALIGN (field_type) = align;
+		}
+	      var = true;
+	    }
+
+	  /* Make a new field name, if necessary.  */
+	  if (var || align != 0)
+	    {
+	      char suffix[16];
+
+	      if (align != 0)
+		sprintf (suffix, "XV%c%u", var ? 'L' : 'A',
+			 align / BITS_PER_UNIT);
+	      else
+		strcpy (suffix, "XVL");
+
+	      field_name = concat_id_with_name (field_name, suffix);
+	    }
+
+	  new_field = create_field_decl (field_name, field_type,
+					 new_record_type, 0,
+					 DECL_SIZE (old_field), pos, 0);
+	  TREE_CHAIN (new_field) = TYPE_FIELDS (new_record_type);
+	  TYPE_FIELDS (new_record_type) = new_field;
+
+	  /* If old_field is a QUAL_UNION_TYPE, take its size as being
+	     zero.  The only time it's not the last field of the record
+	     is when there are other components at fixed positions after
+	     it (meaning there was a rep clause for every field) and we
+	     want to be able to encode them.  */
+	  last_pos = size_binop (PLUS_EXPR, bit_position (old_field),
+				 (TREE_CODE (TREE_TYPE (old_field))
+				  == QUAL_UNION_TYPE)
+				 ? bitsize_zero_node
+				 : DECL_SIZE (old_field));
+	  prev_old_field = old_field;
+	}
+
+      TYPE_FIELDS (new_record_type)
+	= nreverse (TYPE_FIELDS (new_record_type));
+
+      rest_of_type_decl_compilation (TYPE_STUB_DECL (new_record_type));
+    }
+
+  rest_of_type_decl_compilation (TYPE_STUB_DECL (record_type));
+}
+
+/* Append PARALLEL_TYPE on the chain of parallel types for decl.  */
+
+void
+add_parallel_type (tree decl, tree parallel_type)
+{
+  tree d = decl;
+
+  while (DECL_PARALLEL_TYPE (d))
+    d = TYPE_STUB_DECL (DECL_PARALLEL_TYPE (d));
+
+  SET_DECL_PARALLEL_TYPE (d, parallel_type);
+}
+
+/* Return the parallel type associated to a type, if any.  */
+
+tree
+get_parallel_type (tree type)
+{
+  if (TYPE_STUB_DECL (type))
+    return DECL_PARALLEL_TYPE (TYPE_STUB_DECL (type));
+  else
+    return NULL_TREE;
+}
+
+/* Utility function of above to merge LAST_SIZE, the previous size of a record
+   with FIRST_BIT and SIZE that describe a field.  SPECIAL is nonzero
+   if this represents a QUAL_UNION_TYPE in which case we must look for
+   COND_EXPRs and replace a value of zero with the old size.  If HAS_REP
+   is nonzero, we must take the MAX of the end position of this field
+   with LAST_SIZE.  In all other cases, we use FIRST_BIT plus SIZE.
+
+   We return an expression for the size.  */
+
+static tree
+merge_sizes (tree last_size, tree first_bit, tree size, bool special,
+	     bool has_rep)
+{
+  tree type = TREE_TYPE (last_size);
+  tree new;
+
+  if (!special || TREE_CODE (size) != COND_EXPR)
+    {
+      new = size_binop (PLUS_EXPR, first_bit, size);
+      if (has_rep)
+	new = size_binop (MAX_EXPR, last_size, new);
+    }
+
+  else
+    new = fold_build3 (COND_EXPR, type, TREE_OPERAND (size, 0),
+		       integer_zerop (TREE_OPERAND (size, 1))
+		       ? last_size : merge_sizes (last_size, first_bit,
+						  TREE_OPERAND (size, 1),
+						  1, has_rep),
+		       integer_zerop (TREE_OPERAND (size, 2))
+		       ? last_size : merge_sizes (last_size, first_bit,
+						  TREE_OPERAND (size, 2),
+						  1, has_rep));
+
+  /* We don't need any NON_VALUE_EXPRs and they can confuse us (especially
+     when fed through substitute_in_expr) into thinking that a constant
+     size is not constant.  */
+  while (TREE_CODE (new) == NON_LVALUE_EXPR)
+    new = TREE_OPERAND (new, 0);
+
+  return new;
+}
+
+/* Utility function of above to see if OP0 and OP1, both of SIZETYPE, are
+   related by the addition of a constant.  Return that constant if so.  */
+
+static tree
+compute_related_constant (tree op0, tree op1)
+{
+  tree op0_var, op1_var;
+  tree op0_con = split_plus (op0, &op0_var);
+  tree op1_con = split_plus (op1, &op1_var);
+  tree result = size_binop (MINUS_EXPR, op0_con, op1_con);
+
+  if (operand_equal_p (op0_var, op1_var, 0))
+    return result;
+  else if (operand_equal_p (op0, size_binop (PLUS_EXPR, op1_var, result), 0))
+    return result;
+  else
+    return 0;
+}
+
+/* Utility function of above to split a tree OP which may be a sum, into a
+   constant part, which is returned, and a variable part, which is stored
+   in *PVAR.  *PVAR may be bitsize_zero_node.  All operations must be of
+   bitsizetype.  */
+
+static tree
+split_plus (tree in, tree *pvar)
+{
+  /* Strip NOPS in order to ease the tree traversal and maximize the
+     potential for constant or plus/minus discovery. We need to be careful
+     to always return and set *pvar to bitsizetype trees, but it's worth
+     the effort.  */
+  STRIP_NOPS (in);
+
+  *pvar = convert (bitsizetype, in);
+
+  if (TREE_CODE (in) == INTEGER_CST)
+    {
+      *pvar = bitsize_zero_node;
+      return convert (bitsizetype, in);
+    }
+  else if (TREE_CODE (in) == PLUS_EXPR || TREE_CODE (in) == MINUS_EXPR)
+    {
+      tree lhs_var, rhs_var;
+      tree lhs_con = split_plus (TREE_OPERAND (in, 0), &lhs_var);
+      tree rhs_con = split_plus (TREE_OPERAND (in, 1), &rhs_var);
+
+      if (lhs_var == TREE_OPERAND (in, 0)
+	  && rhs_var == TREE_OPERAND (in, 1))
+	return bitsize_zero_node;
+
+      *pvar = size_binop (TREE_CODE (in), lhs_var, rhs_var);
+      return size_binop (TREE_CODE (in), lhs_con, rhs_con);
+    }
+  else
+    return bitsize_zero_node;
+}
+
+/* Return a FUNCTION_TYPE node. RETURN_TYPE is the type returned by the
+   subprogram. If it is void_type_node, then we are dealing with a procedure,
+   otherwise we are dealing with a function. PARAM_DECL_LIST is a list of
+   PARM_DECL nodes that are the subprogram arguments.  CICO_LIST is the
+   copy-in/copy-out list to be stored into TYPE_CICO_LIST.
+   RETURNS_UNCONSTRAINED is true if the function returns an unconstrained
+   object.  RETURNS_BY_REF is true if the function returns by reference.
+   RETURNS_BY_TARGET_PTR is true if the function is to be passed (as its
+   first parameter) the address of the place to copy its result.  */
+
+tree
+create_subprog_type (tree return_type, tree param_decl_list, tree cico_list,
+                     bool returns_unconstrained, bool returns_by_ref,
+                     bool returns_by_target_ptr)
+{
+  /* A chain of TREE_LIST nodes whose TREE_VALUEs are the data type nodes of
+     the subprogram formal parameters. This list is generated by traversing the
+     input list of PARM_DECL nodes.  */
+  tree param_type_list = NULL;
+  tree param_decl;
+  tree type;
+
+  for (param_decl = param_decl_list; param_decl;
+       param_decl = TREE_CHAIN (param_decl))
+    param_type_list = tree_cons (NULL_TREE, TREE_TYPE (param_decl),
+				 param_type_list);
+
+  /* The list of the function parameter types has to be terminated by the void
+     type to signal to the back-end that we are not dealing with a variable
+     parameter subprogram, but that the subprogram has a fixed number of
+     parameters.  */
+  param_type_list = tree_cons (NULL_TREE, void_type_node, param_type_list);
+
+  /* The list of argument types has been created in reverse
+     so nreverse it.   */
+  param_type_list = nreverse (param_type_list);
+
+  type = build_function_type (return_type, param_type_list);
+
+  /* TYPE may have been shared since GCC hashes types.  If it has a CICO_LIST
+     or the new type should, make a copy of TYPE.  Likewise for
+     RETURNS_UNCONSTRAINED and RETURNS_BY_REF.  */
+  if (TYPE_CI_CO_LIST (type) || cico_list
+      || TYPE_RETURNS_UNCONSTRAINED_P (type) != returns_unconstrained
+      || TYPE_RETURNS_BY_REF_P (type) != returns_by_ref
+      || TYPE_RETURNS_BY_TARGET_PTR_P (type) != returns_by_target_ptr)
+    type = copy_type (type);
+
+  TYPE_CI_CO_LIST (type) = cico_list;
+  TYPE_RETURNS_UNCONSTRAINED_P (type) = returns_unconstrained;
+  TYPE_RETURNS_BY_REF_P (type) = returns_by_ref;
+  TYPE_RETURNS_BY_TARGET_PTR_P (type) = returns_by_target_ptr;
+  return type;
+}
+
+/* Return a copy of TYPE but safe to modify in any way.  */
+
+tree
+copy_type (tree type)
+{
+  tree new = copy_node (type);
+
+  /* copy_node clears this field instead of copying it, because it is
+     aliased with TREE_CHAIN.  */
+  TYPE_STUB_DECL (new) = TYPE_STUB_DECL (type);
+
+  TYPE_POINTER_TO (new) = 0;
+  TYPE_REFERENCE_TO (new) = 0;
+  TYPE_MAIN_VARIANT (new) = new;
+  TYPE_NEXT_VARIANT (new) = 0;
+
+  return new;
+}
+
+/* Return an INTEGER_TYPE of SIZETYPE with range MIN to MAX and whose
+   TYPE_INDEX_TYPE is INDEX.  GNAT_NODE is used for the position of
+   the decl.  */
+
+tree
+create_index_type (tree min, tree max, tree index, Node_Id gnat_node)
+{
+  /* First build a type for the desired range.  */
+  tree type = build_index_2_type (min, max);
+
+  /* If this type has the TYPE_INDEX_TYPE we want, return it.  Otherwise, if it
+     doesn't have TYPE_INDEX_TYPE set, set it to INDEX.  If TYPE_INDEX_TYPE
+     is set, but not to INDEX, make a copy of this type with the requested
+     index type.  Note that we have no way of sharing these types, but that's
+     only a small hole.  */
+  if (TYPE_INDEX_TYPE (type) == index)
+    return type;
+  else if (TYPE_INDEX_TYPE (type))
+    type = copy_type (type);
+
+  SET_TYPE_INDEX_TYPE (type, index);
+  create_type_decl (NULL_TREE, type, NULL, true, false, gnat_node);
+  return type;
+}
+
+/* Return a TYPE_DECL node. TYPE_NAME gives the name of the type (a character
+   string) and TYPE is a ..._TYPE node giving its data type.
+   ARTIFICIAL_P is true if this is a declaration that was generated
+   by the compiler.  DEBUG_INFO_P is true if we need to write debugging
+   information about this type.  GNAT_NODE is used for the position of
+   the decl.  */
+
+tree
+create_type_decl (tree type_name, tree type, struct attrib *attr_list,
+		  bool artificial_p, bool debug_info_p, Node_Id gnat_node)
+{
+  tree type_decl = build_decl (TYPE_DECL, type_name, type);
+  enum tree_code code = TREE_CODE (type);
+
+  DECL_ARTIFICIAL (type_decl) = artificial_p;
+
+  if (!TYPE_IS_DUMMY_P (type))
+    gnat_pushdecl (type_decl, gnat_node);
+
+  process_attributes (type_decl, attr_list);
+
+  /* Pass type declaration information to the debugger unless this is an
+     UNCONSTRAINED_ARRAY_TYPE, which the debugger does not support,
+     and ENUMERAL_TYPE or RECORD_TYPE which is handled separately, or
+     type for which debugging information was not requested.  */
+  if (code == UNCONSTRAINED_ARRAY_TYPE || !debug_info_p)
+    DECL_IGNORED_P (type_decl) = 1;
+  else if (code != ENUMERAL_TYPE
+	   && (code != RECORD_TYPE || TYPE_IS_FAT_POINTER_P (type))
+	   && !((code == POINTER_TYPE || code == REFERENCE_TYPE)
+		&& TYPE_IS_DUMMY_P (TREE_TYPE (type))))
+    rest_of_type_decl_compilation (type_decl);
+
+  return type_decl;
+}
+
+/* Return a VAR_DECL or CONST_DECL node.
+
+   VAR_NAME gives the name of the variable.  ASM_NAME is its assembler name
+   (if provided).  TYPE is its data type (a GCC ..._TYPE node).  VAR_INIT is
+   the GCC tree for an optional initial expression; NULL_TREE if none.
+
+   CONST_FLAG is true if this variable is constant, in which case we might
+   return a CONST_DECL node unless CONST_DECL_ALLOWED_P is false.
+
+   PUBLIC_FLAG is true if this is for a reference to a public entity or for a
+   definition to be made visible outside of the current compilation unit, for
+   instance variable definitions in a package specification.
+
+   EXTERN_FLAG is nonzero when processing an external variable declaration (as
+   opposed to a definition: no storage is to be allocated for the variable).
+
+   STATIC_FLAG is only relevant when not at top level.  In that case
+   it indicates whether to always allocate storage to the variable.
+
+   GNAT_NODE is used for the position of the decl.  */
+
+tree
+create_var_decl_1 (tree var_name, tree asm_name, tree type, tree var_init,
+		   bool const_flag, bool public_flag, bool extern_flag,
+		   bool static_flag, bool const_decl_allowed_p,
+		   struct attrib *attr_list, Node_Id gnat_node)
+{
+  bool init_const
+    = (var_init != 0
+       && gnat_types_compatible_p (type, TREE_TYPE (var_init))
+       && (global_bindings_p () || static_flag
+	   ? initializer_constant_valid_p (var_init, TREE_TYPE (var_init)) != 0
+	   : TREE_CONSTANT (var_init)));
+
+  /* Whether we will make TREE_CONSTANT the DECL we produce here, in which
+     case the initializer may be used in-lieu of the DECL node (as done in
+     Identifier_to_gnu).  This is useful to prevent the need of elaboration
+     code when an identifier for which such a decl is made is in turn used as
+     an initializer.  We used to rely on CONST vs VAR_DECL for this purpose,
+     but extra constraints apply to this choice (see below) and are not
+     relevant to the distinction we wish to make. */
+  bool constant_p = const_flag && init_const;
+
+  /* The actual DECL node.  CONST_DECL was initially intended for enumerals
+     and may be used for scalars in general but not for aggregates.  */
+  tree var_decl
+    = build_decl ((constant_p && const_decl_allowed_p
+		   && !AGGREGATE_TYPE_P (type)) ? CONST_DECL : VAR_DECL,
+		  var_name, type);
+
+  /* If this is external, throw away any initializations (they will be done
+     elsewhere) unless this is a constant for which we would like to remain
+     able to get the initializer.  If we are defining a global here, leave a
+     constant initialization and save any variable elaborations for the
+     elaboration routine.  If we are just annotating types, throw away the
+     initialization if it isn't a constant.  */
+  if ((extern_flag && !constant_p)
+      || (type_annotate_only && var_init && !TREE_CONSTANT (var_init)))
+    var_init = NULL_TREE;
+
+  /* At the global level, an initializer requiring code to be generated
+     produces elaboration statements.  Check that such statements are allowed,
+     that is, not violating a No_Elaboration_Code restriction.  */
+  if (global_bindings_p () && var_init != 0 && ! init_const)
+    Check_Elaboration_Code_Allowed (gnat_node);
+
+  /* Ada doesn't feature Fortran-like COMMON variables so we shouldn't
+     try to fiddle with DECL_COMMON.  However, on platforms that don't
+     support global BSS sections, uninitialized global variables would
+     go in DATA instead, thus increasing the size of the executable.  */
+  if (!flag_no_common
+      && TREE_CODE (var_decl) == VAR_DECL
+      && !have_global_bss_p ())
+    DECL_COMMON (var_decl) = 1;
+  DECL_INITIAL  (var_decl) = var_init;
+  TREE_READONLY (var_decl) = const_flag;
+  DECL_EXTERNAL (var_decl) = extern_flag;
+  TREE_PUBLIC   (var_decl) = public_flag || extern_flag;
+  TREE_CONSTANT (var_decl) = constant_p;
+  TREE_THIS_VOLATILE (var_decl) = TREE_SIDE_EFFECTS (var_decl)
+    = TYPE_VOLATILE (type);
+
+  /* If it's public and not external, always allocate storage for it.
+     At the global binding level we need to allocate static storage for the
+     variable if and only if it's not external. If we are not at the top level
+     we allocate automatic storage unless requested not to.  */
+  TREE_STATIC (var_decl)
+    = !extern_flag && (public_flag || static_flag || global_bindings_p ());
+
+  if (asm_name && VAR_OR_FUNCTION_DECL_P (var_decl))
+    SET_DECL_ASSEMBLER_NAME (var_decl, asm_name);
+
+  process_attributes (var_decl, attr_list);
+
+  /* Add this decl to the current binding level.  */
+  gnat_pushdecl (var_decl, gnat_node);
+
+  if (TREE_SIDE_EFFECTS (var_decl))
+    TREE_ADDRESSABLE (var_decl) = 1;
+
+  if (TREE_CODE (var_decl) != CONST_DECL)
+    {
+      if (global_bindings_p ())
+	rest_of_decl_compilation (var_decl, true, 0);
+    }
+  else
+    expand_decl (var_decl);
+
+  return var_decl;
+}
+
+/* Return true if TYPE, an aggregate type, contains (or is) an array.  */
+
+static bool
+aggregate_type_contains_array_p (tree type)
+{
+  switch (TREE_CODE (type))
+    {
+    case RECORD_TYPE:
+    case UNION_TYPE:
+    case QUAL_UNION_TYPE:
+      {
+	tree field;
+	for (field = TYPE_FIELDS (type); field; field = TREE_CHAIN (field))
+	  if (AGGREGATE_TYPE_P (TREE_TYPE (field))
+	      && aggregate_type_contains_array_p (TREE_TYPE (field)))
+	    return true;
+	return false;
+      }
+
+    case ARRAY_TYPE:
+      return true;
+
+    default:
+      gcc_unreachable ();
+    }
+}
+
+/* Returns a FIELD_DECL node. FIELD_NAME the field name, FIELD_TYPE is its
+   type, and RECORD_TYPE is the type of the parent.  PACKED is nonzero if
+   this field is in a record type with a "pragma pack".  If SIZE is nonzero
+   it is the specified size for this field.  If POS is nonzero, it is the bit
+   position.  If ADDRESSABLE is nonzero, it means we are allowed to take
+   the address of this field for aliasing purposes. If it is negative, we
+   should not make a bitfield, which is used by make_aligning_type.   */
+
+tree
+create_field_decl (tree field_name, tree field_type, tree record_type,
+                   int packed, tree size, tree pos, int addressable)
+{
+  tree field_decl = build_decl (FIELD_DECL, field_name, field_type);
+
+  DECL_CONTEXT (field_decl) = record_type;
+  TREE_READONLY (field_decl) = TYPE_READONLY (field_type);
+
+  /* If FIELD_TYPE is BLKmode, we must ensure this is aligned to at least a
+     byte boundary since GCC cannot handle less-aligned BLKmode bitfields.
+     Likewise for an aggregate without specified position that contains an
+     array, because in this case slices of variable length of this array
+     must be handled by GCC and variable-sized objects need to be aligned
+     to at least a byte boundary.  */
+  if (packed && (TYPE_MODE (field_type) == BLKmode
+		 || (!pos
+		     && AGGREGATE_TYPE_P (field_type)
+		     && aggregate_type_contains_array_p (field_type))))
+    DECL_ALIGN (field_decl) = BITS_PER_UNIT;
+
+  /* If a size is specified, use it.  Otherwise, if the record type is packed
+     compute a size to use, which may differ from the object's natural size.
+     We always set a size in this case to trigger the checks for bitfield
+     creation below, which is typically required when no position has been
+     specified.  */
+  if (size)
+    size = convert (bitsizetype, size);
+  else if (packed == 1)
+    {
+      size = rm_size (field_type);
+
+      /* For a constant size larger than MAX_FIXED_MODE_SIZE, round up to
+         byte.  */
+      if (TREE_CODE (size) == INTEGER_CST
+          && compare_tree_int (size, MAX_FIXED_MODE_SIZE) > 0)
+        size = round_up (size, BITS_PER_UNIT);
+    }
+
+  /* If we may, according to ADDRESSABLE, make a bitfield if a size is
+     specified for two reasons: first if the size differs from the natural
+     size.  Second, if the alignment is insufficient.  There are a number of
+     ways the latter can be true.
+
+     We never make a bitfield if the type of the field has a nonconstant size,
+     because no such entity requiring bitfield operations should reach here.
+
+     We do *preventively* make a bitfield when there might be the need for it
+     but we don't have all the necessary information to decide, as is the case
+     of a field with no specified position in a packed record.
+
+     We also don't look at STRICT_ALIGNMENT here, and rely on later processing
+     in layout_decl or finish_record_type to clear the bit_field indication if
+     it is in fact not needed.  */
+  if (addressable >= 0
+      && size
+      && TREE_CODE (size) == INTEGER_CST
+      && TREE_CODE (TYPE_SIZE (field_type)) == INTEGER_CST
+      && (!tree_int_cst_equal (size, TYPE_SIZE (field_type))
+	  || (pos && !value_factor_p (pos, TYPE_ALIGN (field_type)))
+	  || packed
+	  || (TYPE_ALIGN (record_type) != 0
+	      && TYPE_ALIGN (record_type) < TYPE_ALIGN (field_type))))
+    {
+      DECL_BIT_FIELD (field_decl) = 1;
+      DECL_SIZE (field_decl) = size;
+      if (!packed && !pos)
+	DECL_ALIGN (field_decl)
+	  = (TYPE_ALIGN (record_type) != 0
+	     ? MIN (TYPE_ALIGN (record_type), TYPE_ALIGN (field_type))
+	     : TYPE_ALIGN (field_type));
+    }
+
+  DECL_PACKED (field_decl) = pos ? DECL_BIT_FIELD (field_decl) : packed;
+
+  /* Bump the alignment if need be, either for bitfield/packing purposes or
+     to satisfy the type requirements if no such consideration applies.  When
+     we get the alignment from the type, indicate if this is from an explicit
+     user request, which prevents stor-layout from lowering it later on.  */
+  {
+    int bit_align
+      = (DECL_BIT_FIELD (field_decl) ? 1
+	 : packed && TYPE_MODE (field_type) != BLKmode ? BITS_PER_UNIT : 0);
+
+    if (bit_align > DECL_ALIGN (field_decl))
+      DECL_ALIGN (field_decl) = bit_align;
+    else if (!bit_align && TYPE_ALIGN (field_type) > DECL_ALIGN (field_decl))
+      {
+	DECL_ALIGN (field_decl) = TYPE_ALIGN (field_type);
+	DECL_USER_ALIGN (field_decl) = TYPE_USER_ALIGN (field_type);
+      }
+  }
+
+  if (pos)
+    {
+      /* We need to pass in the alignment the DECL is known to have.
+	 This is the lowest-order bit set in POS, but no more than
+	 the alignment of the record, if one is specified.  Note
+	 that an alignment of 0 is taken as infinite.  */
+      unsigned int known_align;
+
+      if (host_integerp (pos, 1))
+	known_align = tree_low_cst (pos, 1) & - tree_low_cst (pos, 1);
+      else
+	known_align = BITS_PER_UNIT;
+
+      if (TYPE_ALIGN (record_type)
+	  && (known_align == 0 || known_align > TYPE_ALIGN (record_type)))
+	known_align = TYPE_ALIGN (record_type);
+
+      layout_decl (field_decl, known_align);
+      SET_DECL_OFFSET_ALIGN (field_decl,
+			     host_integerp (pos, 1) ? BIGGEST_ALIGNMENT
+			     : BITS_PER_UNIT);
+      pos_from_bit (&DECL_FIELD_OFFSET (field_decl),
+		    &DECL_FIELD_BIT_OFFSET (field_decl),
+		    DECL_OFFSET_ALIGN (field_decl), pos);
+
+      DECL_HAS_REP_P (field_decl) = 1;
+    }
+
+  /* In addition to what our caller says, claim the field is addressable if we
+     know that its type is not suitable.
+
+     The field may also be "technically" nonaddressable, meaning that even if
+     we attempt to take the field's address we will actually get the address
+     of a copy.  This is the case for true bitfields, but the DECL_BIT_FIELD
+     value we have at this point is not accurate enough, so we don't account
+     for this here and let finish_record_type decide.  */
+  if (!type_for_nonaliased_component_p (field_type))
+    addressable = 1;
+
+  DECL_NONADDRESSABLE_P (field_decl) = !addressable;
+
+  return field_decl;
+}
+
+/* Returns a PARM_DECL node. PARAM_NAME is the name of the parameter,
+   PARAM_TYPE is its type.  READONLY is true if the parameter is
+   readonly (either an In parameter or an address of a pass-by-ref
+   parameter). */
+
+tree
+create_param_decl (tree param_name, tree param_type, bool readonly)
+{
+  tree param_decl = build_decl (PARM_DECL, param_name, param_type);
+
+  /* Honor targetm.calls.promote_prototypes(), as not doing so can
+     lead to various ABI violations.  */
+  if (targetm.calls.promote_prototypes (param_type)
+      && (TREE_CODE (param_type) == INTEGER_TYPE
+	  || TREE_CODE (param_type) == ENUMERAL_TYPE)
+      && TYPE_PRECISION (param_type) < TYPE_PRECISION (integer_type_node))
+    {
+      /* We have to be careful about biased types here.  Make a subtype
+	 of integer_type_node with the proper biasing.  */
+      if (TREE_CODE (param_type) == INTEGER_TYPE
+	  && TYPE_BIASED_REPRESENTATION_P (param_type))
+	{
+	  param_type
+	    = copy_type (build_range_type (integer_type_node,
+					   TYPE_MIN_VALUE (param_type),
+					   TYPE_MAX_VALUE (param_type)));
+
+	  TYPE_BIASED_REPRESENTATION_P (param_type) = 1;
+	}
+      else
+	param_type = integer_type_node;
+    }
+
+  DECL_ARG_TYPE (param_decl) = param_type;
+  TREE_READONLY (param_decl) = readonly;
+  return param_decl;
+}
+
+/* Given a DECL and ATTR_LIST, process the listed attributes.  */
+
+void
+process_attributes (tree decl, struct attrib *attr_list)
+{
+  for (; attr_list; attr_list = attr_list->next)
+    switch (attr_list->type)
+      {
+      case ATTR_MACHINE_ATTRIBUTE:
+	decl_attributes (&decl, tree_cons (attr_list->name, attr_list->args,
+					   NULL_TREE),
+			 ATTR_FLAG_TYPE_IN_PLACE);
+	break;
+
+      case ATTR_LINK_ALIAS:
+        if (! DECL_EXTERNAL (decl))
+	  {
+	    TREE_STATIC (decl) = 1;
+	    assemble_alias (decl, attr_list->name);
+	  }
+	break;
+
+      case ATTR_WEAK_EXTERNAL:
+	if (SUPPORTS_WEAK)
+	  declare_weak (decl);
+	else
+	  post_error ("?weak declarations not supported on this target",
+		      attr_list->error_point);
+	break;
+
+      case ATTR_LINK_SECTION:
+	if (targetm.have_named_sections)
+	  {
+	    DECL_SECTION_NAME (decl)
+	      = build_string (IDENTIFIER_LENGTH (attr_list->name),
+			      IDENTIFIER_POINTER (attr_list->name));
+	    DECL_COMMON (decl) = 0;
+	  }
+	else
+	  post_error ("?section attributes are not supported for this target",
+		      attr_list->error_point);
+	break;
+
+      case ATTR_LINK_CONSTRUCTOR:
+	DECL_STATIC_CONSTRUCTOR (decl) = 1;
+	TREE_USED (decl) = 1;
+	break;
+
+      case ATTR_LINK_DESTRUCTOR:
+	DECL_STATIC_DESTRUCTOR (decl) = 1;
+	TREE_USED (decl) = 1;
+	break;
+      }
+}
+
+/* Record a global renaming pointer.  */
+
+void
+record_global_renaming_pointer (tree decl)
+{
+  gcc_assert (DECL_RENAMED_OBJECT (decl));
+  VEC_safe_push (tree, gc, global_renaming_pointers, decl);
+}
+
+/* Invalidate the global renaming pointers.   */
+
+void
+invalidate_global_renaming_pointers (void)
+{
+  unsigned int i;
+  tree iter;
+
+  for (i = 0; VEC_iterate(tree, global_renaming_pointers, i, iter); i++)
+    SET_DECL_RENAMED_OBJECT (iter, NULL_TREE);
+
+  VEC_free (tree, gc, global_renaming_pointers);
+}
+
+/* Return true if VALUE is a known to be a multiple of FACTOR, which must be
+   a power of 2. */
+
+bool
+value_factor_p (tree value, HOST_WIDE_INT factor)
+{
+  if (host_integerp (value, 1))
+    return tree_low_cst (value, 1) % factor == 0;
+
+  if (TREE_CODE (value) == MULT_EXPR)
+    return (value_factor_p (TREE_OPERAND (value, 0), factor)
+            || value_factor_p (TREE_OPERAND (value, 1), factor));
+
+  return false;
+}
+
+/* Given 2 consecutive field decls PREV_FIELD and CURR_FIELD, return true
+   unless we can prove these 2 fields are laid out in such a way that no gap
+   exist between the end of PREV_FIELD and the beginning of CURR_FIELD.  OFFSET
+   is the distance in bits between the end of PREV_FIELD and the starting
+   position of CURR_FIELD. It is ignored if null. */
+
+static bool
+potential_alignment_gap (tree prev_field, tree curr_field, tree offset)
+{
+  /* If this is the first field of the record, there cannot be any gap */
+  if (!prev_field)
+    return false;
+
+  /* If the previous field is a union type, then return False: The only
+     time when such a field is not the last field of the record is when
+     there are other components at fixed positions after it (meaning there
+     was a rep clause for every field), in which case we don't want the
+     alignment constraint to override them. */
+  if (TREE_CODE (TREE_TYPE (prev_field)) == QUAL_UNION_TYPE)
+    return false;
+
+  /* If the distance between the end of prev_field and the beginning of
+     curr_field is constant, then there is a gap if the value of this
+     constant is not null. */
+  if (offset && host_integerp (offset, 1))
+    return !integer_zerop (offset);
+
+  /* If the size and position of the previous field are constant,
+     then check the sum of this size and position. There will be a gap
+     iff it is not multiple of the current field alignment. */
+  if (host_integerp (DECL_SIZE (prev_field), 1)
+      && host_integerp (bit_position (prev_field), 1))
+    return ((tree_low_cst (bit_position (prev_field), 1)
+	     + tree_low_cst (DECL_SIZE (prev_field), 1))
+	    % DECL_ALIGN (curr_field) != 0);
+
+  /* If both the position and size of the previous field are multiples
+     of the current field alignment, there cannot be any gap. */
+  if (value_factor_p (bit_position (prev_field), DECL_ALIGN (curr_field))
+      && value_factor_p (DECL_SIZE (prev_field), DECL_ALIGN (curr_field)))
+    return false;
+
+  /* Fallback, return that there may be a potential gap */
+  return true;
+}
+
+/* Returns a LABEL_DECL node for LABEL_NAME.  */
+
+tree
+create_label_decl (tree label_name)
+{
+  tree label_decl = build_decl (LABEL_DECL, label_name, void_type_node);
+
+  DECL_CONTEXT (label_decl)     = current_function_decl;
+  DECL_MODE (label_decl)        = VOIDmode;
+  DECL_SOURCE_LOCATION (label_decl) = input_location;
+
+  return label_decl;
+}
+
+/* Returns a FUNCTION_DECL node.  SUBPROG_NAME is the name of the subprogram,
+   ASM_NAME is its assembler name, SUBPROG_TYPE is its type (a FUNCTION_TYPE
+   node), PARAM_DECL_LIST is the list of the subprogram arguments (a list of
+   PARM_DECL nodes chained through the TREE_CHAIN field).
+
+   INLINE_FLAG, PUBLIC_FLAG, EXTERN_FLAG, and ATTR_LIST are used to set the
+   appropriate fields in the FUNCTION_DECL.  GNAT_NODE gives the location.  */
+
+tree
+create_subprog_decl (tree subprog_name, tree asm_name,
+                     tree subprog_type, tree param_decl_list, bool inline_flag,
+		     bool public_flag, bool extern_flag,
+                     struct attrib *attr_list, Node_Id gnat_node)
+{
+  tree return_type  = TREE_TYPE (subprog_type);
+  tree subprog_decl = build_decl (FUNCTION_DECL, subprog_name, subprog_type);
+
+  /* If this is a function nested inside an inlined external function, it
+     means we aren't going to compile the outer function unless it is
+     actually inlined, so do the same for us.  */
+  if (current_function_decl && DECL_INLINE (current_function_decl)
+      && DECL_EXTERNAL (current_function_decl))
+    extern_flag = true;
+
+  DECL_EXTERNAL (subprog_decl)  = extern_flag;
+  TREE_PUBLIC (subprog_decl)    = public_flag;
+  TREE_STATIC (subprog_decl)	= 1;
+  TREE_READONLY (subprog_decl)  = TYPE_READONLY (subprog_type);
+  TREE_THIS_VOLATILE (subprog_decl) = TYPE_VOLATILE (subprog_type);
+  TREE_SIDE_EFFECTS (subprog_decl) = TYPE_VOLATILE (subprog_type);
+  DECL_ARGUMENTS (subprog_decl) = param_decl_list;
+  DECL_RESULT (subprog_decl)    = build_decl (RESULT_DECL, 0, return_type);
+  DECL_ARTIFICIAL (DECL_RESULT (subprog_decl)) = 1;
+  DECL_IGNORED_P (DECL_RESULT (subprog_decl)) = 1;
+
+  /* TREE_ADDRESSABLE is set on the result type to request the use of the
+     target by-reference return mechanism.  This is not supported all the
+     way down to RTL expansion with GCC 4, which ICEs on temporary creation
+     attempts with such a type and expects DECL_BY_REFERENCE to be set on
+     the RESULT_DECL instead - see gnat_genericize for more details.  */
+  if (TREE_ADDRESSABLE (TREE_TYPE (DECL_RESULT (subprog_decl))))
+    {
+      tree result_decl = DECL_RESULT (subprog_decl);
+
+      TREE_ADDRESSABLE (TREE_TYPE (result_decl)) = 0;
+      DECL_BY_REFERENCE (result_decl) = 1;
+    }
+
+  if (inline_flag)
+    DECL_DECLARED_INLINE_P (subprog_decl) = 1;
+
+  if (asm_name)
+    {
+      SET_DECL_ASSEMBLER_NAME (subprog_decl, asm_name);
+
+      /* The expand_main_function circuitry expects "main_identifier_node" to
+	 designate the DECL_NAME of the 'main' entry point, in turn expected
+	 to be declared as the "main" function literally by default.  Ada
+	 program entry points are typically declared with a different name
+	 within the binder generated file, exported as 'main' to satisfy the
+	 system expectations.  Redirect main_identifier_node in this case.  */
+      if (asm_name == main_identifier_node)
+	main_identifier_node = DECL_NAME (subprog_decl);
+    }
+
+  process_attributes (subprog_decl, attr_list);
+
+  /* Add this decl to the current binding level.  */
+  gnat_pushdecl (subprog_decl, gnat_node);
+
+  /* Output the assembler code and/or RTL for the declaration.  */
+  rest_of_decl_compilation (subprog_decl, global_bindings_p (), 0);
+
+  return subprog_decl;
+}
+
+/* Set up the framework for generating code for SUBPROG_DECL, a subprogram
+   body.  This routine needs to be invoked before processing the declarations
+   appearing in the subprogram.  */
+
+void
+begin_subprog_body (tree subprog_decl)
+{
+  tree param_decl;
+
+  current_function_decl = subprog_decl;
+  announce_function (subprog_decl);
+
+  /* Enter a new binding level and show that all the parameters belong to
+     this function.  */
+  gnat_pushlevel ();
+  for (param_decl = DECL_ARGUMENTS (subprog_decl); param_decl;
+       param_decl = TREE_CHAIN (param_decl))
+    DECL_CONTEXT (param_decl) = subprog_decl;
+
+  make_decl_rtl (subprog_decl);
+
+  /* We handle pending sizes via the elaboration of types, so we don't need to
+     save them.  This causes them to be marked as part of the outer function
+     and then discarded.  */
+  get_pending_sizes ();
+}
+
+
+/* Helper for the genericization callback.  Return a dereference of VAL
+   if it is of a reference type.  */
+
+static tree
+convert_from_reference (tree val)
+{
+  tree value_type, ref;
+
+  if (TREE_CODE (TREE_TYPE (val)) != REFERENCE_TYPE)
+    return val;
+
+  value_type =  TREE_TYPE (TREE_TYPE (val));
+  ref = build1 (INDIRECT_REF, value_type, val);
+
+  /* See if what we reference is CONST or VOLATILE, which requires
+     looking into array types to get to the component type.  */
+
+  while (TREE_CODE (value_type) == ARRAY_TYPE)
+    value_type = TREE_TYPE (value_type);
+
+  TREE_READONLY (ref)
+    = (TYPE_QUALS (value_type) & TYPE_QUAL_CONST);
+  TREE_THIS_VOLATILE (ref)
+    = (TYPE_QUALS (value_type) & TYPE_QUAL_VOLATILE);
+
+  TREE_SIDE_EFFECTS (ref)
+    = (TREE_THIS_VOLATILE (ref) || TREE_SIDE_EFFECTS (val));
+
+  return ref;
+}
+
+/* Helper for the genericization callback.  Returns true if T denotes
+   a RESULT_DECL with DECL_BY_REFERENCE set.  */
+
+static inline bool
+is_byref_result (tree t)
+{
+  return (TREE_CODE (t) == RESULT_DECL && DECL_BY_REFERENCE (t));
+}
+
+
+/* Tree walking callback for gnat_genericize. Currently ...
+
+   o Adjust references to the function's DECL_RESULT if it is marked
+     DECL_BY_REFERENCE and so has had its type turned into a reference
+     type at the end of the function compilation.  */
+
+static tree
+gnat_genericize_r (tree *stmt_p, int *walk_subtrees, void *data)
+{
+  /* This implementation is modeled after what the C++ front-end is
+     doing, basis of the downstream passes behavior.  */
+
+  tree stmt = *stmt_p;
+  struct pointer_set_t *p_set = (struct pointer_set_t*) data;
+
+  /* If we have a direct mention of the result decl, dereference.  */
+  if (is_byref_result (stmt))
+    {
+      *stmt_p = convert_from_reference (stmt);
+      *walk_subtrees = 0;
+      return NULL;
+    }
+
+  /* Otherwise, no need to walk the same tree twice.  */
+  if (pointer_set_contains (p_set, stmt))
+    {
+      *walk_subtrees = 0;
+      return NULL_TREE;
+    }
+
+  /* If we are taking the address of what now is a reference, just get the
+     reference value.  */
+  if (TREE_CODE (stmt) == ADDR_EXPR
+      && is_byref_result (TREE_OPERAND (stmt, 0)))
+    {
+      *stmt_p = convert (TREE_TYPE (stmt), TREE_OPERAND (stmt, 0));
+      *walk_subtrees = 0;
+    }
+
+  /* Don't dereference an by-reference RESULT_DECL inside a RETURN_EXPR.  */
+  else if (TREE_CODE (stmt) == RETURN_EXPR
+           && TREE_OPERAND (stmt, 0)
+	   && is_byref_result (TREE_OPERAND (stmt, 0)))
+    *walk_subtrees = 0;
+
+  /* Don't look inside trees that cannot embed references of interest.  */
+  else if (IS_TYPE_OR_DECL_P (stmt))
+    *walk_subtrees = 0;
+
+  pointer_set_insert (p_set, *stmt_p);
+
+  return NULL;
+}
+
+/* Perform lowering of Ada trees to GENERIC. In particular:
+
+   o Turn a DECL_BY_REFERENCE RESULT_DECL into a real by-reference decl
+     and adjust all the references to this decl accordingly.  */
+
+static void
+gnat_genericize (tree fndecl)
+{
+  /* Prior to GCC 4, an explicit By_Reference result mechanism for a function
+     was handled by simply setting TREE_ADDRESSABLE on the result type.
+     Everything required to actually pass by invisible ref using the target
+     mechanism (e.g. extra parameter) was handled at RTL expansion time.
+
+     This doesn't work with GCC 4 any more for several reasons.  First, the
+     gimplification process might need the creation of temporaries of this
+     type, and the gimplifier ICEs on such attempts.  Second, the middle-end
+     now relies on a different attribute for such cases (DECL_BY_REFERENCE on
+     RESULT/PARM_DECLs), and expects the user invisible by-reference-ness to
+     be explicitly accounted for by the front-end in the function body.
+
+     We achieve the complete transformation in two steps:
+
+     1/ create_subprog_decl performs early attribute tweaks: it clears
+        TREE_ADDRESSABLE from the result type and sets DECL_BY_REFERENCE on
+        the result decl.  The former ensures that the bit isn't set in the GCC
+        tree saved for the function, so prevents ICEs on temporary creation.
+        The latter we use here to trigger the rest of the processing.
+
+     2/ This function performs the type transformation on the result decl
+        and adjusts all the references to this decl from the function body
+	accordingly.
+
+     Clearing TREE_ADDRESSABLE from the type differs from the C++ front-end
+     strategy, which escapes the gimplifier temporary creation issues by
+     creating it's own temporaries using TARGET_EXPR nodes.  Our way relies
+     on simple specific support code in aggregate_value_p to look at the
+     target function result decl explicitly.  */
+
+  struct pointer_set_t *p_set;
+  tree decl_result = DECL_RESULT (fndecl);
+
+  if (!DECL_BY_REFERENCE (decl_result))
+    return;
+
+  /* Make the DECL_RESULT explicitly by-reference and adjust all the
+     occurrences in the function body using the common tree-walking facility.
+     We want to see every occurrence of the result decl to adjust the
+     referencing tree, so need to use our own pointer set to control which
+     trees should be visited again or not.  */
+
+  p_set = pointer_set_create ();
+
+  TREE_TYPE (decl_result) = build_reference_type (TREE_TYPE (decl_result));
+  TREE_ADDRESSABLE (decl_result) = 0;
+  relayout_decl (decl_result);
+
+  walk_tree (&DECL_SAVED_TREE (fndecl), gnat_genericize_r, p_set, NULL);
+
+  pointer_set_destroy (p_set);
+}
+
+/* Finish the definition of the current subprogram BODY and compile it all the
+   way to assembler language output.  ELAB_P tells if this is called for an
+   elaboration routine, to be entirely discarded if empty.  */
+
+void
+end_subprog_body (tree body, bool elab_p)
+{
+  tree fndecl = current_function_decl;
+
+  /* Mark the BLOCK for this level as being for this function and pop the
+     level.  Since the vars in it are the parameters, clear them.  */
+  BLOCK_VARS (current_binding_level->block) = 0;
+  BLOCK_SUPERCONTEXT (current_binding_level->block) = fndecl;
+  DECL_INITIAL (fndecl) = current_binding_level->block;
+  gnat_poplevel ();
+
+  /* Deal with inline.  If declared inline or we should default to inline,
+     set the flag in the decl.  */
+  DECL_INLINE (fndecl) = 1;
+
+  /* We handle pending sizes via the elaboration of types, so we don't
+     need to save them.  */
+  get_pending_sizes ();
+
+  /* Mark the RESULT_DECL as being in this subprogram. */
+  DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
+
+  DECL_SAVED_TREE (fndecl) = body;
+
+  current_function_decl = DECL_CONTEXT (fndecl);
+  set_cfun (NULL);
+
+  /* We cannot track the location of errors past this point.  */
+  error_gnat_node = Empty;
+
+  /* If we're only annotating types, don't actually compile this function.  */
+  if (type_annotate_only)
+    return;
+
+  /* Perform the required pre-gimplification transformations on the tree.  */
+  gnat_genericize (fndecl);
+
+  /* We do different things for nested and non-nested functions.
+     ??? This should be in cgraph.  */
+  if (!DECL_CONTEXT (fndecl))
+    {
+      gnat_gimplify_function (fndecl);
+
+      /* If this is an empty elaboration proc, just discard the node.
+	 Otherwise, compile further.  */
+      if (elab_p && empty_body_p (gimple_body (fndecl)))
+	cgraph_remove_node (cgraph_node (fndecl));
+      else
+	cgraph_finalize_function (fndecl, false);
+    }
+  else
+    /* Register this function with cgraph just far enough to get it
+       added to our parent's nested function list.  */
+    (void) cgraph_node (fndecl);
+}
+
+/* Convert FNDECL's code to GIMPLE and handle any nested functions.  */
+
+static void
+gnat_gimplify_function (tree fndecl)
+{
+  struct cgraph_node *cgn;
+
+  dump_function (TDI_original, fndecl);
+  gimplify_function_tree (fndecl);
+  dump_function (TDI_generic, fndecl);
+
+  /* Convert all nested functions to GIMPLE now.  We do things in this order
+     so that items like VLA sizes are expanded properly in the context of the
+     correct function.  */
+  cgn = cgraph_node (fndecl);
+  for (cgn = cgn->nested; cgn; cgn = cgn->next_nested)
+    gnat_gimplify_function (cgn->decl);
+}
+
+
+tree
+gnat_builtin_function (tree decl)
+{
+  gnat_pushdecl (decl, Empty);
+  return decl;
+}
+
+/* Return an integer type with the number of bits of precision given by
+   PRECISION.  UNSIGNEDP is nonzero if the type is unsigned; otherwise
+   it is a signed type.  */
+
+tree
+gnat_type_for_size (unsigned precision, int unsignedp)
+{
+  tree t;
+  char type_name[20];
+
+  if (precision <= 2 * MAX_BITS_PER_WORD
+      && signed_and_unsigned_types[precision][unsignedp])
+    return signed_and_unsigned_types[precision][unsignedp];
+
+ if (unsignedp)
+    t = make_unsigned_type (precision);
+  else
+    t = make_signed_type (precision);
+
+  if (precision <= 2 * MAX_BITS_PER_WORD)
+    signed_and_unsigned_types[precision][unsignedp] = t;
+
+  if (!TYPE_NAME (t))
+    {
+      sprintf (type_name, "%sSIGNED_%d", unsignedp ? "UN" : "", precision);
+      TYPE_NAME (t) = get_identifier (type_name);
+    }
+
+  return t;
+}
+
+/* Likewise for floating-point types.  */
+
+static tree
+float_type_for_precision (int precision, enum machine_mode mode)
+{
+  tree t;
+  char type_name[20];
+
+  if (float_types[(int) mode])
+    return float_types[(int) mode];
+
+  float_types[(int) mode] = t = make_node (REAL_TYPE);
+  TYPE_PRECISION (t) = precision;
+  layout_type (t);
+
+  gcc_assert (TYPE_MODE (t) == mode);
+  if (!TYPE_NAME (t))
+    {
+      sprintf (type_name, "FLOAT_%d", precision);
+      TYPE_NAME (t) = get_identifier (type_name);
+    }
+
+  return t;
+}
+
+/* Return a data type that has machine mode MODE.  UNSIGNEDP selects
+   an unsigned type; otherwise a signed type is returned.  */
+
+tree
+gnat_type_for_mode (enum machine_mode mode, int unsignedp)
+{
+  if (mode == BLKmode)
+    return NULL_TREE;
+  else if (mode == VOIDmode)
+    return void_type_node;
+  else if (COMPLEX_MODE_P (mode))
+    return NULL_TREE;
+  else if (SCALAR_FLOAT_MODE_P (mode))
+    return float_type_for_precision (GET_MODE_PRECISION (mode), mode);
+  else if (SCALAR_INT_MODE_P (mode))
+    return gnat_type_for_size (GET_MODE_BITSIZE (mode), unsignedp);
+  else
+    return NULL_TREE;
+}
+
+/* Return the unsigned version of a TYPE_NODE, a scalar type.  */
+
+tree
+gnat_unsigned_type (tree type_node)
+{
+  tree type = gnat_type_for_size (TYPE_PRECISION (type_node), 1);
+
+  if (TREE_CODE (type_node) == INTEGER_TYPE && TYPE_MODULAR_P (type_node))
+    {
+      type = copy_node (type);
+      TREE_TYPE (type) = type_node;
+    }
+  else if (TREE_TYPE (type_node)
+	   && TREE_CODE (TREE_TYPE (type_node)) == INTEGER_TYPE
+	   && TYPE_MODULAR_P (TREE_TYPE (type_node)))
+    {
+      type = copy_node (type);
+      TREE_TYPE (type) = TREE_TYPE (type_node);
+    }
+
+  return type;
+}
+
+/* Return the signed version of a TYPE_NODE, a scalar type.  */
+
+tree
+gnat_signed_type (tree type_node)
+{
+  tree type = gnat_type_for_size (TYPE_PRECISION (type_node), 0);
+
+  if (TREE_CODE (type_node) == INTEGER_TYPE && TYPE_MODULAR_P (type_node))
+    {
+      type = copy_node (type);
+      TREE_TYPE (type) = type_node;
+    }
+  else if (TREE_TYPE (type_node)
+	   && TREE_CODE (TREE_TYPE (type_node)) == INTEGER_TYPE
+	   && TYPE_MODULAR_P (TREE_TYPE (type_node)))
+    {
+      type = copy_node (type);
+      TREE_TYPE (type) = TREE_TYPE (type_node);
+    }
+
+  return type;
+}
+
+/* Return 1 if the types T1 and T2 are compatible, i.e. if they can be
+   transparently converted to each other.  */
+
+int
+gnat_types_compatible_p (tree t1, tree t2)
+{
+  enum tree_code code;
+
+  /* This is the default criterion.  */
+  if (TYPE_MAIN_VARIANT (t1) == TYPE_MAIN_VARIANT (t2))
+    return 1;
+
+  /* We only check structural equivalence here.  */
+  if ((code = TREE_CODE (t1)) != TREE_CODE (t2))
+    return 0;
+
+  /* Array types are also compatible if they are constrained and have
+     the same component type and the same domain.  */
+  if (code == ARRAY_TYPE
+      && TREE_TYPE (t1) == TREE_TYPE (t2)
+      && tree_int_cst_equal (TYPE_MIN_VALUE (TYPE_DOMAIN (t1)),
+			     TYPE_MIN_VALUE (TYPE_DOMAIN (t2)))
+      && tree_int_cst_equal (TYPE_MAX_VALUE (TYPE_DOMAIN (t1)),
+			     TYPE_MAX_VALUE (TYPE_DOMAIN (t2))))
+    return 1;
+
+  /* Padding record types are also compatible if they pad the same
+     type and have the same constant size.  */
+  if (code == RECORD_TYPE
+      && TYPE_IS_PADDING_P (t1) && TYPE_IS_PADDING_P (t2)
+      && TREE_TYPE (TYPE_FIELDS (t1)) == TREE_TYPE (TYPE_FIELDS (t2))
+      && tree_int_cst_equal (TYPE_SIZE (t1), TYPE_SIZE (t2)))
+    return 1;
+
+  return 0;
+}
+
+/* EXP is an expression for the size of an object.  If this size contains
+   discriminant references, replace them with the maximum (if MAX_P) or
+   minimum (if !MAX_P) possible value of the discriminant.  */
+
+tree
+max_size (tree exp, bool max_p)
+{
+  enum tree_code code = TREE_CODE (exp);
+  tree type = TREE_TYPE (exp);
+
+  switch (TREE_CODE_CLASS (code))
+    {
+    case tcc_declaration:
+    case tcc_constant:
+      return exp;
+
+    case tcc_vl_exp:
+      if (code == CALL_EXPR)
+	{
+	  tree *argarray;
+	  int i, n = call_expr_nargs (exp);
+	  gcc_assert (n > 0);
+
+	  argarray = (tree *) alloca (n * sizeof (tree));
+	  for (i = 0; i < n; i++)
+	    argarray[i] = max_size (CALL_EXPR_ARG (exp, i), max_p);
+	  return build_call_array (type, CALL_EXPR_FN (exp), n, argarray);
+	}
+      break;
+
+    case tcc_reference:
+      /* If this contains a PLACEHOLDER_EXPR, it is the thing we want to
+	 modify.  Otherwise, we treat it like a variable.  */
+      if (!CONTAINS_PLACEHOLDER_P (exp))
+	return exp;
+
+      type = TREE_TYPE (TREE_OPERAND (exp, 1));
+      return
+	max_size (max_p ? TYPE_MAX_VALUE (type) : TYPE_MIN_VALUE (type), true);
+
+    case tcc_comparison:
+      return max_p ? size_one_node : size_zero_node;
+
+    case tcc_unary:
+    case tcc_binary:
+    case tcc_expression:
+      switch (TREE_CODE_LENGTH (code))
+	{
+	case 1:
+	  if (code == NON_LVALUE_EXPR)
+	    return max_size (TREE_OPERAND (exp, 0), max_p);
+	  else
+	    return
+	      fold_build1 (code, type,
+			   max_size (TREE_OPERAND (exp, 0),
+				     code == NEGATE_EXPR ? !max_p : max_p));
+
+	case 2:
+	  if (code == COMPOUND_EXPR)
+	    return max_size (TREE_OPERAND (exp, 1), max_p);
+
+	  /* Calculate "(A ? B : C) - D" as "A ? B - D : C - D" which
+	     may provide a tighter bound on max_size.  */
+	  if (code == MINUS_EXPR
+	      && TREE_CODE (TREE_OPERAND (exp, 0)) == COND_EXPR)
+	    {
+	      tree lhs = fold_build2 (MINUS_EXPR, type,
+				      TREE_OPERAND (TREE_OPERAND (exp, 0), 1),
+				      TREE_OPERAND (exp, 1));
+	      tree rhs = fold_build2 (MINUS_EXPR, type,
+				      TREE_OPERAND (TREE_OPERAND (exp, 0), 2),
+				      TREE_OPERAND (exp, 1));
+	      return fold_build2 (max_p ? MAX_EXPR : MIN_EXPR, type,
+				  max_size (lhs, max_p),
+				  max_size (rhs, max_p));
+	    }
+
+	  {
+	    tree lhs = max_size (TREE_OPERAND (exp, 0), max_p);
+	    tree rhs = max_size (TREE_OPERAND (exp, 1),
+				 code == MINUS_EXPR ? !max_p : max_p);
+
+	    /* Special-case wanting the maximum value of a MIN_EXPR.
+	       In that case, if one side overflows, return the other.
+	       sizetype is signed, but we know sizes are non-negative.
+	       Likewise, handle a MINUS_EXPR or PLUS_EXPR with the LHS
+	       overflowing or the maximum possible value and the RHS
+	       a variable.  */
+	    if (max_p
+		&& code == MIN_EXPR
+		&& TREE_CODE (rhs) == INTEGER_CST
+		&& TREE_OVERFLOW (rhs))
+	      return lhs;
+	    else if (max_p
+		     && code == MIN_EXPR
+		     && TREE_CODE (lhs) == INTEGER_CST
+		     && TREE_OVERFLOW (lhs))
+	      return rhs;
+	    else if ((code == MINUS_EXPR || code == PLUS_EXPR)
+		     && ((TREE_CODE (lhs) == INTEGER_CST
+			  && TREE_OVERFLOW (lhs))
+			 || operand_equal_p (lhs, TYPE_MAX_VALUE (type), 0))
+		     && !TREE_CONSTANT (rhs))
+	      return lhs;
+	    else
+	      return fold_build2 (code, type, lhs, rhs);
+	  }
+
+	case 3:
+	  if (code == SAVE_EXPR)
+	    return exp;
+	  else if (code == COND_EXPR)
+	    return fold_build2 (max_p ? MAX_EXPR : MIN_EXPR, type,
+				max_size (TREE_OPERAND (exp, 1), max_p),
+				max_size (TREE_OPERAND (exp, 2), max_p));
+	}
+
+      /* Other tree classes cannot happen.  */
+    default:
+      break;
+    }
+
+  gcc_unreachable ();
+}
+
+/* Build a template of type TEMPLATE_TYPE from the array bounds of ARRAY_TYPE.
+   EXPR is an expression that we can use to locate any PLACEHOLDER_EXPRs.
+   Return a constructor for the template.  */
+
+tree
+build_template (tree template_type, tree array_type, tree expr)
+{
+  tree template_elts = NULL_TREE;
+  tree bound_list = NULL_TREE;
+  tree field;
+
+  while (TREE_CODE (array_type) == RECORD_TYPE
+	 && (TYPE_IS_PADDING_P (array_type)
+	     || TYPE_JUSTIFIED_MODULAR_P (array_type)))
+    array_type = TREE_TYPE (TYPE_FIELDS (array_type));
+
+  if (TREE_CODE (array_type) == ARRAY_TYPE
+      || (TREE_CODE (array_type) == INTEGER_TYPE
+	  && TYPE_HAS_ACTUAL_BOUNDS_P (array_type)))
+    bound_list = TYPE_ACTUAL_BOUNDS (array_type);
+
+  /* First make the list for a CONSTRUCTOR for the template.  Go down the
+     field list of the template instead of the type chain because this
+     array might be an Ada array of arrays and we can't tell where the
+     nested arrays stop being the underlying object.  */
+
+  for (field = TYPE_FIELDS (template_type); field;
+       (bound_list
+	? (bound_list = TREE_CHAIN (bound_list))
+	: (array_type = TREE_TYPE (array_type))),
+       field = TREE_CHAIN (TREE_CHAIN (field)))
+    {
+      tree bounds, min, max;
+
+      /* If we have a bound list, get the bounds from there.  Likewise
+	 for an ARRAY_TYPE.  Otherwise, if expr is a PARM_DECL with
+	 DECL_BY_COMPONENT_PTR_P, use the bounds of the field in the template.
+	 This will give us a maximum range.  */
+      if (bound_list)
+	bounds = TREE_VALUE (bound_list);
+      else if (TREE_CODE (array_type) == ARRAY_TYPE)
+	bounds = TYPE_INDEX_TYPE (TYPE_DOMAIN (array_type));
+      else if (expr && TREE_CODE (expr) == PARM_DECL
+	       && DECL_BY_COMPONENT_PTR_P (expr))
+	bounds = TREE_TYPE (field);
+      else
+	gcc_unreachable ();
+
+      min = convert (TREE_TYPE (field), TYPE_MIN_VALUE (bounds));
+      max = convert (TREE_TYPE (TREE_CHAIN (field)), TYPE_MAX_VALUE (bounds));
+
+      /* If either MIN or MAX involve a PLACEHOLDER_EXPR, we must
+	 substitute it from OBJECT.  */
+      min = SUBSTITUTE_PLACEHOLDER_IN_EXPR (min, expr);
+      max = SUBSTITUTE_PLACEHOLDER_IN_EXPR (max, expr);
+
+      template_elts = tree_cons (TREE_CHAIN (field), max,
+				 tree_cons (field, min, template_elts));
+    }
+
+  return gnat_build_constructor (template_type, nreverse (template_elts));
+}
+
+/* Build a VMS descriptor from a Mechanism_Type, which must specify
+   a descriptor type, and the GCC type of an object.  Each FIELD_DECL
+   in the type contains in its DECL_INITIAL the expression to use when
+   a constructor is made for the type.  GNAT_ENTITY is an entity used
+   to print out an error message if the mechanism cannot be applied to
+   an object of that type and also for the name.  */
+
+tree
+build_vms_descriptor (tree type, Mechanism_Type mech, Entity_Id gnat_entity)
+{
+  tree record_type = make_node (RECORD_TYPE);
+  tree pointer32_type;
+  tree field_list = 0;
+  int class;
+  int dtype = 0;
+  tree inner_type;
+  int ndim;
+  int i;
+  tree *idx_arr;
+  tree tem;
+
+  /* If TYPE is an unconstrained array, use the underlying array type.  */
+  if (TREE_CODE (type) == UNCONSTRAINED_ARRAY_TYPE)
+    type = TREE_TYPE (TREE_TYPE (TYPE_FIELDS (TREE_TYPE (type))));
+
+  /* If this is an array, compute the number of dimensions in the array,
+     get the index types, and point to the inner type.  */
+  if (TREE_CODE (type) != ARRAY_TYPE)
+    ndim = 0;
+  else
+    for (ndim = 1, inner_type = type;
+	 TREE_CODE (TREE_TYPE (inner_type)) == ARRAY_TYPE
+	 && TYPE_MULTI_ARRAY_P (TREE_TYPE (inner_type));
+	 ndim++, inner_type = TREE_TYPE (inner_type))
+      ;
+
+  idx_arr = (tree *) alloca (ndim * sizeof (tree));
+
+  if (mech != By_Descriptor_NCA
+      && TREE_CODE (type) == ARRAY_TYPE && TYPE_CONVENTION_FORTRAN_P (type))
+    for (i = ndim - 1, inner_type = type;
+	 i >= 0;
+	 i--, inner_type = TREE_TYPE (inner_type))
+      idx_arr[i] = TYPE_DOMAIN (inner_type);
+  else
+    for (i = 0, inner_type = type;
+	 i < ndim;
+	 i++, inner_type = TREE_TYPE (inner_type))
+      idx_arr[i] = TYPE_DOMAIN (inner_type);
+
+  /* Now get the DTYPE value.  */
+  switch (TREE_CODE (type))
+    {
+    case INTEGER_TYPE:
+    case ENUMERAL_TYPE:
+      if (TYPE_VAX_FLOATING_POINT_P (type))
+	switch (tree_low_cst (TYPE_DIGITS_VALUE (type), 1))
+	  {
+	  case 6:
+	    dtype = 10;
+	    break;
+	  case 9:
+	    dtype = 11;
+	    break;
+	  case 15:
+	    dtype = 27;
+	    break;
+	  }
+      else
+	switch (GET_MODE_BITSIZE (TYPE_MODE (type)))
+	  {
+	  case 8:
+	    dtype = TYPE_UNSIGNED (type) ? 2 : 6;
+	    break;
+	  case 16:
+	    dtype = TYPE_UNSIGNED (type) ? 3 : 7;
+	    break;
+	  case 32:
+	    dtype = TYPE_UNSIGNED (type) ? 4 : 8;
+	    break;
+	  case 64:
+	    dtype = TYPE_UNSIGNED (type) ? 5 : 9;
+	    break;
+	  case 128:
+	    dtype = TYPE_UNSIGNED (type) ? 25 : 26;
+	    break;
+	  }
+      break;
+
+    case REAL_TYPE:
+      dtype = GET_MODE_BITSIZE (TYPE_MODE (type)) == 32 ? 52 : 53;
+      break;
+
+    case COMPLEX_TYPE:
+      if (TREE_CODE (TREE_TYPE (type)) == INTEGER_TYPE
+	  && TYPE_VAX_FLOATING_POINT_P (type))
+	switch (tree_low_cst (TYPE_DIGITS_VALUE (type), 1))
+	  {
+	  case 6:
+	    dtype = 12;
+	    break;
+	  case 9:
+	    dtype = 13;
+	    break;
+	  case 15:
+	    dtype = 29;
+	  }
+      else
+	dtype = GET_MODE_BITSIZE (TYPE_MODE (TREE_TYPE (type))) == 32 ? 54: 55;
+      break;
+
+    case ARRAY_TYPE:
+      dtype = 14;
+      break;
+
+    default:
+      break;
+    }
+
+  /* Get the CLASS value.  */
+  switch (mech)
+    {
+    case By_Descriptor_A:
+      class = 4;
+      break;
+    case By_Descriptor_NCA:
+      class = 10;
+      break;
+    case By_Descriptor_SB:
+      class = 15;
+      break;
+    case By_Descriptor:
+    case By_Descriptor_S:
+    default:
+      class = 1;
+      break;
+    }
+
+  /* Make the type for a descriptor for VMS.  The first four fields
+     are the same for all types.  */
+
+  field_list
+    = chainon (field_list,
+	       make_descriptor_field
+	       ("LENGTH", gnat_type_for_size (16, 1), record_type,
+		size_in_bytes (mech == By_Descriptor_A ? inner_type : type)));
+
+  field_list = chainon (field_list,
+			make_descriptor_field ("DTYPE",
+					       gnat_type_for_size (8, 1),
+					       record_type, size_int (dtype)));
+  field_list = chainon (field_list,
+			make_descriptor_field ("CLASS",
+					       gnat_type_for_size (8, 1),
+					       record_type, size_int (class)));
+
+  /* Of course this will crash at run-time if the address space is not
+     within the low 32 bits, but there is nothing else we can do.  */
+  pointer32_type = build_pointer_type_for_mode (type, SImode, false);
+
+  field_list
+    = chainon (field_list,
+	       make_descriptor_field
+	       ("POINTER", pointer32_type, record_type,
+		build_unary_op (ADDR_EXPR,
+				pointer32_type,
+				build0 (PLACEHOLDER_EXPR, type))));
+
+  switch (mech)
+    {
+    case By_Descriptor:
+    case By_Descriptor_S:
+      break;
+
+    case By_Descriptor_SB:
+      field_list
+	= chainon (field_list,
+		   make_descriptor_field
+		   ("SB_L1", gnat_type_for_size (32, 1), record_type,
+		    TREE_CODE (type) == ARRAY_TYPE
+		    ? TYPE_MIN_VALUE (TYPE_DOMAIN (type)) : size_zero_node));
+      field_list
+	= chainon (field_list,
+		   make_descriptor_field
+		   ("SB_U1", gnat_type_for_size (32, 1), record_type,
+		    TREE_CODE (type) == ARRAY_TYPE
+		    ? TYPE_MAX_VALUE (TYPE_DOMAIN (type)) : size_zero_node));
+      break;
+
+    case By_Descriptor_A:
+    case By_Descriptor_NCA:
+      field_list = chainon (field_list,
+			    make_descriptor_field ("SCALE",
+						   gnat_type_for_size (8, 1),
+						   record_type,
+						   size_zero_node));
+
+      field_list = chainon (field_list,
+			    make_descriptor_field ("DIGITS",
+						   gnat_type_for_size (8, 1),
+						   record_type,
+						   size_zero_node));
+
+      field_list
+	= chainon (field_list,
+		   make_descriptor_field
+		   ("AFLAGS", gnat_type_for_size (8, 1), record_type,
+		    size_int (mech == By_Descriptor_NCA
+			      ? 0
+			      /* Set FL_COLUMN, FL_COEFF, and FL_BOUNDS.  */
+			      : (TREE_CODE (type) == ARRAY_TYPE
+				 && TYPE_CONVENTION_FORTRAN_P (type)
+				 ? 224 : 192))));
+
+      field_list = chainon (field_list,
+			    make_descriptor_field ("DIMCT",
+						   gnat_type_for_size (8, 1),
+						   record_type,
+						   size_int (ndim)));
+
+      field_list = chainon (field_list,
+			    make_descriptor_field ("ARSIZE",
+						   gnat_type_for_size (32, 1),
+						   record_type,
+						   size_in_bytes (type)));
+
+      /* Now build a pointer to the 0,0,0... element.  */
+      tem = build0 (PLACEHOLDER_EXPR, type);
+      for (i = 0, inner_type = type; i < ndim;
+	   i++, inner_type = TREE_TYPE (inner_type))
+	tem = build4 (ARRAY_REF, TREE_TYPE (inner_type), tem,
+		      convert (TYPE_DOMAIN (inner_type), size_zero_node),
+		      NULL_TREE, NULL_TREE);
+
+      field_list
+	= chainon (field_list,
+		   make_descriptor_field
+		   ("A0",
+		    build_pointer_type_for_mode (inner_type, SImode, false),
+		    record_type,
+		    build1 (ADDR_EXPR,
+			    build_pointer_type_for_mode (inner_type, SImode,
+							 false),
+			    tem)));
+
+      /* Next come the addressing coefficients.  */
+      tem = size_one_node;
+      for (i = 0; i < ndim; i++)
+	{
+	  char fname[3];
+	  tree idx_length
+	    = size_binop (MULT_EXPR, tem,
+			  size_binop (PLUS_EXPR,
+				      size_binop (MINUS_EXPR,
+						  TYPE_MAX_VALUE (idx_arr[i]),
+						  TYPE_MIN_VALUE (idx_arr[i])),
+				      size_int (1)));
+
+	  fname[0] = (mech == By_Descriptor_NCA ? 'S' : 'M');
+	  fname[1] = '0' + i, fname[2] = 0;
+	  field_list
+	    = chainon (field_list,
+		       make_descriptor_field (fname,
+					      gnat_type_for_size (32, 1),
+					      record_type, idx_length));
+
+	  if (mech == By_Descriptor_NCA)
+	    tem = idx_length;
+	}
+
+      /* Finally here are the bounds.  */
+      for (i = 0; i < ndim; i++)
+	{
+	  char fname[3];
+
+	  fname[0] = 'L', fname[1] = '0' + i, fname[2] = 0;
+	  field_list
+	    = chainon (field_list,
+		       make_descriptor_field
+		       (fname, gnat_type_for_size (32, 1), record_type,
+			TYPE_MIN_VALUE (idx_arr[i])));
+
+	  fname[0] = 'U';
+	  field_list
+	    = chainon (field_list,
+		       make_descriptor_field
+		       (fname, gnat_type_for_size (32, 1), record_type,
+			TYPE_MAX_VALUE (idx_arr[i])));
+	}
+      break;
+
+    default:
+      post_error ("unsupported descriptor type for &", gnat_entity);
+    }
+
+  finish_record_type (record_type, field_list, 0, true);
+  create_type_decl (create_concat_name (gnat_entity, "DESC"), record_type,
+		    NULL, true, false, gnat_entity);
+
+  return record_type;
+}
+
+/* Utility routine for above code to make a field.  */
+
+static tree
+make_descriptor_field (const char *name, tree type,
+		       tree rec_type, tree initial)
+{
+  tree field
+    = create_field_decl (get_identifier (name), type, rec_type, 0, 0, 0, 0);
+
+  DECL_INITIAL (field) = initial;
+  return field;
+}
+
+/* Convert GNU_EXPR, a pointer to a VMS descriptor, to GNU_TYPE, a regular
+   pointer or fat pointer type.  GNAT_SUBPROG is the subprogram to which
+   the VMS descriptor is passed.  */
+
+static tree
+convert_vms_descriptor (tree gnu_type, tree gnu_expr, Entity_Id gnat_subprog)
+{
+  tree desc_type = TREE_TYPE (TREE_TYPE (gnu_expr));
+  tree desc = build1 (INDIRECT_REF, desc_type, gnu_expr);
+  /* The CLASS field is the 3rd field in the descriptor.  */
+  tree class = TREE_CHAIN (TREE_CHAIN (TYPE_FIELDS (desc_type)));
+  /* The POINTER field is the 4th field in the descriptor.  */
+  tree pointer = TREE_CHAIN (class);
+
+  /* Retrieve the value of the POINTER field.  */
+  gnu_expr
+    = build3 (COMPONENT_REF, TREE_TYPE (pointer), desc, pointer, NULL_TREE);
+
+  if (POINTER_TYPE_P (gnu_type))
+    return convert (gnu_type, gnu_expr);
+
+  else if (TYPE_FAT_POINTER_P (gnu_type))
+    {
+      tree p_array_type = TREE_TYPE (TYPE_FIELDS (gnu_type));
+      tree p_bounds_type = TREE_TYPE (TREE_CHAIN (TYPE_FIELDS (gnu_type)));
+      tree template_type = TREE_TYPE (p_bounds_type);
+      tree min_field = TYPE_FIELDS (template_type);
+      tree max_field = TREE_CHAIN (TYPE_FIELDS (template_type));
+      tree template, template_addr, aflags, dimct, t, u;
+      /* See the head comment of build_vms_descriptor.  */
+      int iclass = TREE_INT_CST_LOW (DECL_INITIAL (class));
+
+      /* Convert POINTER to the type of the P_ARRAY field.  */
+      gnu_expr = convert (p_array_type, gnu_expr);
+
+      switch (iclass)
+	{
+	case 1:  /* Class S  */
+	case 15: /* Class SB */
+	  /* Build {1, LENGTH} template; LENGTH is the 1st field.  */
+	  t = TYPE_FIELDS (desc_type);
+	  t = build3 (COMPONENT_REF, TREE_TYPE (t), desc, t, NULL_TREE);
+	  t = tree_cons (min_field,
+			 convert (TREE_TYPE (min_field), integer_one_node),
+			 tree_cons (max_field,
+				    convert (TREE_TYPE (max_field), t),
+				    NULL_TREE));
+	  template = gnat_build_constructor (template_type, t);
+	  template_addr = build_unary_op (ADDR_EXPR, NULL_TREE, template);
+
+	  /* For class S, we are done.  */
+	  if (iclass == 1)
+	    break;
+
+	  /* Test that we really have a SB descriptor, like DEC Ada.  */
+	  t = build3 (COMPONENT_REF, TREE_TYPE (class), desc, class, NULL);
+	  u = convert (TREE_TYPE (class), DECL_INITIAL (class));
+	  u = build_binary_op (EQ_EXPR, integer_type_node, t, u);
+	  /* If so, there is already a template in the descriptor and
+	     it is located right after the POINTER field.  */
+	  t = TREE_CHAIN (pointer);
+	  template = build3 (COMPONENT_REF, TREE_TYPE (t), desc, t, NULL_TREE);
+	  /* Otherwise use the {1, LENGTH} template we build above.  */
+	  template_addr = build3 (COND_EXPR, p_bounds_type, u,
+				  build_unary_op (ADDR_EXPR, p_bounds_type,
+				 		 template),
+				  template_addr);
+	  break;
+
+	case 4:  /* Class A */
+	  /* The AFLAGS field is the 7th field in the descriptor.  */
+	  t = TREE_CHAIN (TREE_CHAIN (TREE_CHAIN (pointer)));
+	  aflags = build3 (COMPONENT_REF, TREE_TYPE (t), desc, t, NULL_TREE);
+	  /* The DIMCT field is the 8th field in the descriptor.  */
+	  t = TREE_CHAIN (t);
+	  dimct = build3 (COMPONENT_REF, TREE_TYPE (t), desc, t, NULL_TREE);
+	  /* Raise CONSTRAINT_ERROR if either more than 1 dimension
+	     or FL_COEFF or FL_BOUNDS not set.  */
+	  u = build_int_cst (TREE_TYPE (aflags), 192);
+	  u = build_binary_op (TRUTH_OR_EXPR, integer_type_node,
+			       build_binary_op (NE_EXPR, integer_type_node,
+						dimct,
+						convert (TREE_TYPE (dimct),
+							 size_one_node)),
+			       build_binary_op (NE_EXPR, integer_type_node,
+						build2 (BIT_AND_EXPR,
+							TREE_TYPE (aflags),
+							aflags, u),
+						u));
+	  add_stmt (build3 (COND_EXPR, void_type_node, u,
+			    build_call_raise (CE_Length_Check_Failed, Empty,
+					      N_Raise_Constraint_Error),
+			    NULL_TREE));
+	  /* There is already a template in the descriptor and it is
+	     located at the start of block 3 (12th field).  */
+	  t = TREE_CHAIN (TREE_CHAIN (TREE_CHAIN (TREE_CHAIN (t))));
+	  template = build3 (COMPONENT_REF, TREE_TYPE (t), desc, t, NULL_TREE);
+	  template_addr = build_unary_op (ADDR_EXPR, p_bounds_type, template);
+	  break;
+
+	case 10: /* Class NCA */
+	default:
+	  post_error ("unsupported descriptor type for &", gnat_subprog);
+	  template_addr = integer_zero_node;
+	  break;
+	}
+
+      /* Build the fat pointer in the form of a constructor.  */
+      t = tree_cons (TYPE_FIELDS (gnu_type), gnu_expr,
+		     tree_cons (TREE_CHAIN (TYPE_FIELDS (gnu_type)),
+				template_addr, NULL_TREE));
+      return gnat_build_constructor (gnu_type, t);
+    }
+
+  else
+    gcc_unreachable ();
+}
+
+/* Build a stub for the subprogram specified by the GCC tree GNU_SUBPROG
+   and the GNAT node GNAT_SUBPROG.  */
+
+void
+build_function_stub (tree gnu_subprog, Entity_Id gnat_subprog)
+{
+  tree gnu_subprog_type, gnu_subprog_addr, gnu_subprog_call;
+  tree gnu_stub_param, gnu_param_list, gnu_arg_types, gnu_param;
+  tree gnu_stub_decl = DECL_FUNCTION_STUB (gnu_subprog);
+  tree gnu_body;
+
+  gnu_subprog_type = TREE_TYPE (gnu_subprog);
+  gnu_param_list = NULL_TREE;
+
+  begin_subprog_body (gnu_stub_decl);
+  gnat_pushlevel ();
+
+  start_stmt_group ();
+
+  /* Loop over the parameters of the stub and translate any of them
+     passed by descriptor into a by reference one.  */
+  for (gnu_stub_param = DECL_ARGUMENTS (gnu_stub_decl),
+       gnu_arg_types = TYPE_ARG_TYPES (gnu_subprog_type);
+       gnu_stub_param;
+       gnu_stub_param = TREE_CHAIN (gnu_stub_param),
+       gnu_arg_types = TREE_CHAIN (gnu_arg_types))
+    {
+      if (DECL_BY_DESCRIPTOR_P (gnu_stub_param))
+	gnu_param = convert_vms_descriptor (TREE_VALUE (gnu_arg_types),
+					    gnu_stub_param, gnat_subprog);
+      else
+	gnu_param = gnu_stub_param;
+
+      gnu_param_list = tree_cons (NULL_TREE, gnu_param, gnu_param_list);
+    }
+
+  gnu_body = end_stmt_group ();
+
+  /* Invoke the internal subprogram.  */
+  gnu_subprog_addr = build1 (ADDR_EXPR, build_pointer_type (gnu_subprog_type),
+			     gnu_subprog);
+  gnu_subprog_call = build_call_list (TREE_TYPE (gnu_subprog_type),
+				      gnu_subprog_addr,
+				      nreverse (gnu_param_list));
+
+  /* Propagate the return value, if any.  */
+  if (VOID_TYPE_P (TREE_TYPE (gnu_subprog_type)))
+    append_to_statement_list (gnu_subprog_call, &gnu_body);
+  else
+    append_to_statement_list (build_return_expr (DECL_RESULT (gnu_stub_decl),
+						 gnu_subprog_call),
+			      &gnu_body);
+
+  gnat_poplevel ();
+
+  allocate_struct_function (gnu_stub_decl, false);
+  end_subprog_body (gnu_body, false);
+}
+
+/* Build a type to be used to represent an aliased object whose nominal
+   type is an unconstrained array.  This consists of a RECORD_TYPE containing
+   a field of TEMPLATE_TYPE and a field of OBJECT_TYPE, which is an
+   ARRAY_TYPE.  If ARRAY_TYPE is that of the unconstrained array, this
+   is used to represent an arbitrary unconstrained object.  Use NAME
+   as the name of the record.  */
+
+tree
+build_unc_object_type (tree template_type, tree object_type, tree name)
+{
+  tree type = make_node (RECORD_TYPE);
+  tree template_field = create_field_decl (get_identifier ("BOUNDS"),
+					   template_type, type, 0, 0, 0, 1);
+  tree array_field = create_field_decl (get_identifier ("ARRAY"), object_type,
+					type, 0, 0, 0, 1);
+
+  TYPE_NAME (type) = name;
+  TYPE_CONTAINS_TEMPLATE_P (type) = 1;
+  finish_record_type (type,
+		      chainon (chainon (NULL_TREE, template_field),
+			       array_field),
+		      0, false);
+
+  return type;
+}
+
+/* Same, taking a thin or fat pointer type instead of a template type. */
+
+tree
+build_unc_object_type_from_ptr (tree thin_fat_ptr_type, tree object_type,
+				tree name)
+{
+  tree template_type;
+
+  gcc_assert (TYPE_FAT_OR_THIN_POINTER_P (thin_fat_ptr_type));
+
+  template_type
+    = (TYPE_FAT_POINTER_P (thin_fat_ptr_type)
+       ? TREE_TYPE (TREE_TYPE (TREE_CHAIN (TYPE_FIELDS (thin_fat_ptr_type))))
+       : TREE_TYPE (TYPE_FIELDS (TREE_TYPE (thin_fat_ptr_type))));
+  return build_unc_object_type (template_type, object_type, name);
+}
+
+/* Shift the component offsets within an unconstrained object TYPE to make it
+   suitable for use as a designated type for thin pointers.  */
+
+void
+shift_unc_components_for_thin_pointers (tree type)
+{
+  /* Thin pointer values designate the ARRAY data of an unconstrained object,
+     allocated past the BOUNDS template.  The designated type is adjusted to
+     have ARRAY at position zero and the template at a negative offset, so
+     that COMPONENT_REFs on (*thin_ptr) designate the proper location.  */
+
+  tree bounds_field = TYPE_FIELDS (type);
+  tree array_field  = TREE_CHAIN (TYPE_FIELDS (type));
+
+  DECL_FIELD_OFFSET (bounds_field)
+    = size_binop (MINUS_EXPR, size_zero_node, byte_position (array_field));
+
+  DECL_FIELD_OFFSET (array_field) = size_zero_node;
+  DECL_FIELD_BIT_OFFSET (array_field) = bitsize_zero_node;
+}
+
+/* Update anything previously pointing to OLD_TYPE to point to NEW_TYPE.  In
+   the normal case this is just two adjustments, but we have more to do
+   if NEW is an UNCONSTRAINED_ARRAY_TYPE.  */
+
+void
+update_pointer_to (tree old_type, tree new_type)
+{
+  tree ptr = TYPE_POINTER_TO (old_type);
+  tree ref = TYPE_REFERENCE_TO (old_type);
+  tree ptr1, ref1;
+  tree type;
+
+  /* If this is the main variant, process all the other variants first.  */
+  if (TYPE_MAIN_VARIANT (old_type) == old_type)
+    for (type = TYPE_NEXT_VARIANT (old_type); type;
+	 type = TYPE_NEXT_VARIANT (type))
+      update_pointer_to (type, new_type);
+
+  /* If no pointer or reference, we are done.  */
+  if (!ptr && !ref)
+    return;
+
+  /* Merge the old type qualifiers in the new type.
+
+     Each old variant has qualifiers for specific reasons, and the new
+     designated type as well. Each set of qualifiers represents useful
+     information grabbed at some point, and merging the two simply unifies
+     these inputs into the final type description.
+
+     Consider for instance a volatile type frozen after an access to constant
+     type designating it. After the designated type freeze, we get here with a
+     volatile new_type and a dummy old_type with a readonly variant, created
+     when the access type was processed. We shall make a volatile and readonly
+     designated type, because that's what it really is.
+
+     We might also get here for a non-dummy old_type variant with different
+     qualifiers than the new_type ones, for instance in some cases of pointers
+     to private record type elaboration (see the comments around the call to
+     this routine from gnat_to_gnu_entity/E_Access_Type). We have to merge the
+     qualifiers in those cases too, to avoid accidentally discarding the
+     initial set, and will often end up with old_type == new_type then.  */
+  new_type = build_qualified_type (new_type,
+				   TYPE_QUALS (old_type)
+				   | TYPE_QUALS (new_type));
+
+  /* If the new type and the old one are identical, there is nothing to
+     update.  */
+  if (old_type == new_type)
+    return;
+
+  /* Otherwise, first handle the simple case.  */
+  if (TREE_CODE (new_type) != UNCONSTRAINED_ARRAY_TYPE)
+    {
+      TYPE_POINTER_TO (new_type) = ptr;
+      TYPE_REFERENCE_TO (new_type) = ref;
+
+      for (; ptr; ptr = TYPE_NEXT_PTR_TO (ptr))
+	for (ptr1 = TYPE_MAIN_VARIANT (ptr); ptr1;
+	     ptr1 = TYPE_NEXT_VARIANT (ptr1))
+	  TREE_TYPE (ptr1) = new_type;
+
+      for (; ref; ref = TYPE_NEXT_REF_TO (ref))
+	for (ref1 = TYPE_MAIN_VARIANT (ref); ref1;
+	     ref1 = TYPE_NEXT_VARIANT (ref1))
+	  TREE_TYPE (ref1) = new_type;
+    }
+
+  /* Now deal with the unconstrained array case. In this case the "pointer"
+     is actually a RECORD_TYPE where both fields are pointers to dummy nodes.
+     Turn them into pointers to the correct types using update_pointer_to.  */
+  else if (TREE_CODE (ptr) != RECORD_TYPE || !TYPE_IS_FAT_POINTER_P (ptr))
+    gcc_unreachable ();
+
+  else
+    {
+      tree new_obj_rec = TYPE_OBJECT_RECORD_TYPE (new_type);
+      tree array_field = TYPE_FIELDS (ptr);
+      tree bounds_field = TREE_CHAIN (TYPE_FIELDS (ptr));
+      tree new_ptr = TYPE_POINTER_TO (new_type);
+      tree new_ref;
+      tree var;
+
+      /* Make pointers to the dummy template point to the real template.  */
+      update_pointer_to
+	(TREE_TYPE (TREE_TYPE (bounds_field)),
+	 TREE_TYPE (TREE_TYPE (TREE_CHAIN (TYPE_FIELDS (new_ptr)))));
+
+      /* The references to the template bounds present in the array type
+	 are made through a PLACEHOLDER_EXPR of type new_ptr.  Since we
+	 are updating ptr to make it a full replacement for new_ptr as
+	 pointer to new_type, we must rework the PLACEHOLDER_EXPR so as
+	 to make it of type ptr.  */
+      new_ref = build3 (COMPONENT_REF, TREE_TYPE (bounds_field),
+			build0 (PLACEHOLDER_EXPR, ptr),
+			bounds_field, NULL_TREE);
+
+      /* Create the new array for the new PLACEHOLDER_EXPR and make
+	 pointers to the dummy array point to it.
+
+	 ??? This is now the only use of substitute_in_type,
+	 which is a very "heavy" routine to do this, so it
+	 should be replaced at some point.  */
+      update_pointer_to
+	(TREE_TYPE (TREE_TYPE (array_field)),
+	 substitute_in_type (TREE_TYPE (TREE_TYPE (TYPE_FIELDS (new_ptr))),
+			     TREE_CHAIN (TYPE_FIELDS (new_ptr)), new_ref));
+
+      /* Make ptr the pointer to new_type.  */
+      TYPE_POINTER_TO (new_type) = TYPE_REFERENCE_TO (new_type)
+	= TREE_TYPE (new_type) = ptr;
+
+      for (var = TYPE_MAIN_VARIANT (ptr); var; var = TYPE_NEXT_VARIANT (var))
+	SET_TYPE_UNCONSTRAINED_ARRAY (var, new_type);
+
+      /* Now handle updating the allocation record, what the thin pointer
+	 points to.  Update all pointers from the old record into the new
+	 one, update the type of the array field, and recompute the size.  */
+      update_pointer_to (TYPE_OBJECT_RECORD_TYPE (old_type), new_obj_rec);
+
+      TREE_TYPE (TREE_CHAIN (TYPE_FIELDS (new_obj_rec)))
+	= TREE_TYPE (TREE_TYPE (array_field));
+
+      /* The size recomputation needs to account for alignment constraints, so
+	 we let layout_type work it out.  This will reset the field offsets to
+	 what they would be in a regular record, so we shift them back to what
+	 we want them to be for a thin pointer designated type afterwards.  */
+      DECL_SIZE (TYPE_FIELDS (new_obj_rec)) = 0;
+      DECL_SIZE (TREE_CHAIN (TYPE_FIELDS (new_obj_rec))) = 0;
+      TYPE_SIZE (new_obj_rec) = 0;
+      layout_type (new_obj_rec);
+
+      shift_unc_components_for_thin_pointers (new_obj_rec);
+
+      /* We are done, at last.  */
+      rest_of_record_type_compilation (ptr);
+    }
+}
+
+/* Convert a pointer to a constrained array into a pointer to a fat
+   pointer.  This involves making or finding a template.  */
+
+static tree
+convert_to_fat_pointer (tree type, tree expr)
+{
+  tree template_type = TREE_TYPE (TREE_TYPE (TREE_CHAIN (TYPE_FIELDS (type))));
+  tree template, template_addr;
+  tree etype = TREE_TYPE (expr);
+
+  /* If EXPR is a constant of zero, we make a fat pointer that has a null
+     pointer to the template and array.  */
+  if (integer_zerop (expr))
+    return
+      gnat_build_constructor
+	(type,
+	 tree_cons (TYPE_FIELDS (type),
+		    convert (TREE_TYPE (TYPE_FIELDS (type)), expr),
+		    tree_cons (TREE_CHAIN (TYPE_FIELDS (type)),
+			       convert (build_pointer_type (template_type),
+					expr),
+			       NULL_TREE)));
+
+  /* If EXPR is a thin pointer, make the template and data from the record.  */
+
+  else if (TYPE_THIN_POINTER_P (etype))
+    {
+      tree fields = TYPE_FIELDS (TREE_TYPE (etype));
+
+      expr = save_expr (expr);
+      if (TREE_CODE (expr) == ADDR_EXPR)
+	expr = TREE_OPERAND (expr, 0);
+      else
+	expr = build1 (INDIRECT_REF, TREE_TYPE (etype), expr);
+
+      template = build_component_ref (expr, NULL_TREE, fields, false);
+      expr = build_unary_op (ADDR_EXPR, NULL_TREE,
+			     build_component_ref (expr, NULL_TREE,
+						  TREE_CHAIN (fields), false));
+    }
+  else
+    /* Otherwise, build the constructor for the template.  */
+    template = build_template (template_type, TREE_TYPE (etype), expr);
+
+  template_addr = build_unary_op (ADDR_EXPR, NULL_TREE, template);
+
+  /* The result is a CONSTRUCTOR for the fat pointer.
+
+     If expr is an argument of a foreign convention subprogram, the type it
+     points to is directly the component type. In this case, the expression
+     type may not match the corresponding FIELD_DECL type at this point, so we
+     call "convert" here to fix that up if necessary. This type consistency is
+     required, for instance because it ensures that possible later folding of
+     component_refs against this constructor always yields something of the
+     same type as the initial reference.
+
+     Note that the call to "build_template" above is still fine, because it
+     will only refer to the provided template_type in this case.  */
+   return
+     gnat_build_constructor
+     (type, tree_cons (TYPE_FIELDS (type),
+ 		      convert (TREE_TYPE (TYPE_FIELDS (type)), expr),
+ 		      tree_cons (TREE_CHAIN (TYPE_FIELDS (type)),
+ 				 template_addr, NULL_TREE)));
+}
+
+/* Convert to a thin pointer type, TYPE.  The only thing we know how to convert
+   is something that is a fat pointer, so convert to it first if it EXPR
+   is not already a fat pointer.  */
+
+static tree
+convert_to_thin_pointer (tree type, tree expr)
+{
+  if (!TYPE_FAT_POINTER_P (TREE_TYPE (expr)))
+    expr
+      = convert_to_fat_pointer
+	(TREE_TYPE (TYPE_UNCONSTRAINED_ARRAY (TREE_TYPE (type))), expr);
+
+  /* We get the pointer to the data and use a NOP_EXPR to make it the
+     proper GCC type.  */
+  expr = build_component_ref (expr, NULL_TREE, TYPE_FIELDS (TREE_TYPE (expr)),
+			      false);
+  expr = build1 (NOP_EXPR, type, expr);
+
+  return expr;
+}
+
+/* Create an expression whose value is that of EXPR,
+   converted to type TYPE.  The TREE_TYPE of the value
+   is always TYPE.  This function implements all reasonable
+   conversions; callers should filter out those that are
+   not permitted by the language being compiled.  */
+
+tree
+convert (tree type, tree expr)
+{
+  enum tree_code code = TREE_CODE (type);
+  tree etype = TREE_TYPE (expr);
+  enum tree_code ecode = TREE_CODE (etype);
+
+  /* If EXPR is already the right type, we are done.  */
+  if (type == etype)
+    return expr;
+
+  /* If both input and output have padding and are of variable size, do this
+     as an unchecked conversion.  Likewise if one is a mere variant of the
+     other, so we avoid a pointless unpad/repad sequence.  */
+  else if (code == RECORD_TYPE && ecode == RECORD_TYPE
+	   && TYPE_IS_PADDING_P (type) && TYPE_IS_PADDING_P (etype)
+	   && (!TREE_CONSTANT (TYPE_SIZE (type))
+	       || !TREE_CONSTANT (TYPE_SIZE (etype))
+	       || gnat_types_compatible_p (type, etype)
+	       || TYPE_NAME (TREE_TYPE (TYPE_FIELDS (type)))
+		  == TYPE_NAME (TREE_TYPE (TYPE_FIELDS (etype)))))
+    ;
+
+  /* If the output type has padding, convert to the inner type and
+     make a constructor to build the record.  */
+  else if (code == RECORD_TYPE && TYPE_IS_PADDING_P (type))
+    {
+      /* If we previously converted from another type and our type is
+	 of variable size, remove the conversion to avoid the need for
+	 variable-size temporaries.  Likewise for a conversion between
+	 original and packable version.  */
+      if (TREE_CODE (expr) == VIEW_CONVERT_EXPR
+	  && (!TREE_CONSTANT (TYPE_SIZE (type))
+	      || (ecode == RECORD_TYPE
+		  && TYPE_NAME (etype)
+		     == TYPE_NAME (TREE_TYPE (TREE_OPERAND (expr, 0))))))
+	expr = TREE_OPERAND (expr, 0);
+
+      /* If we are just removing the padding from expr, convert the original
+	 object if we have variable size in order to avoid the need for some
+	 variable-size temporaries.  Likewise if the padding is a mere variant
+	 of the other, so we avoid a pointless unpad/repad sequence.  */
+      if (TREE_CODE (expr) == COMPONENT_REF
+	  && TREE_CODE (TREE_TYPE (TREE_OPERAND (expr, 0))) == RECORD_TYPE
+	  && TYPE_IS_PADDING_P (TREE_TYPE (TREE_OPERAND (expr, 0)))
+	  && (!TREE_CONSTANT (TYPE_SIZE (type))
+	      || gnat_types_compatible_p (type,
+					  TREE_TYPE (TREE_OPERAND (expr, 0)))
+	      || (ecode == RECORD_TYPE
+		  && TYPE_NAME (etype)
+		     == TYPE_NAME (TREE_TYPE (TYPE_FIELDS (type))))))
+	return convert (type, TREE_OPERAND (expr, 0));
+
+      /* If the result type is a padded type with a self-referentially-sized
+	 field and the expression type is a record, do this as an
+	 unchecked conversion.  */
+      else if (TREE_CODE (etype) == RECORD_TYPE
+	       && CONTAINS_PLACEHOLDER_P (DECL_SIZE (TYPE_FIELDS (type))))
+	return unchecked_convert (type, expr, false);
+
+      else
+	return
+	  gnat_build_constructor (type,
+			     tree_cons (TYPE_FIELDS (type),
+					convert (TREE_TYPE
+						 (TYPE_FIELDS (type)),
+						 expr),
+					NULL_TREE));
+    }
+
+  /* If the input type has padding, remove it and convert to the output type.
+     The conditions ordering is arranged to ensure that the output type is not
+     a padding type here, as it is not clear whether the conversion would
+     always be correct if this was to happen.  */
+  else if (ecode == RECORD_TYPE && TYPE_IS_PADDING_P (etype))
+    {
+      tree unpadded;
+
+      /* If we have just converted to this padded type, just get the
+	 inner expression.  */
+      if (TREE_CODE (expr) == CONSTRUCTOR
+	  && !VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (expr))
+	  && VEC_index (constructor_elt, CONSTRUCTOR_ELTS (expr), 0)->index
+	     == TYPE_FIELDS (etype))
+	unpadded
+	  = VEC_index (constructor_elt, CONSTRUCTOR_ELTS (expr), 0)->value;
+
+      /* Otherwise, build an explicit component reference.  */
+      else
+	unpadded
+	  = build_component_ref (expr, NULL_TREE, TYPE_FIELDS (etype), false);
+
+      return convert (type, unpadded);
+    }
+
+  /* If the input is a biased type, adjust first.  */
+  if (ecode == INTEGER_TYPE && TYPE_BIASED_REPRESENTATION_P (etype))
+    return convert (type, fold_build2 (PLUS_EXPR, TREE_TYPE (etype),
+				       fold_convert (TREE_TYPE (etype),
+						     expr),
+				       TYPE_MIN_VALUE (etype)));
+
+  /* If the input is a justified modular type, we need to extract the actual
+     object before converting it to any other type with the exceptions of an
+     unconstrained array or of a mere type variant.  It is useful to avoid the
+     extraction and conversion in the type variant case because it could end
+     up replacing a VAR_DECL expr by a constructor and we might be about the
+     take the address of the result.  */
+  if (ecode == RECORD_TYPE && TYPE_JUSTIFIED_MODULAR_P (etype)
+      && code != UNCONSTRAINED_ARRAY_TYPE
+      && TYPE_MAIN_VARIANT (type) != TYPE_MAIN_VARIANT (etype))
+    return convert (type, build_component_ref (expr, NULL_TREE,
+					       TYPE_FIELDS (etype), false));
+
+  /* If converting to a type that contains a template, convert to the data
+     type and then build the template. */
+  if (code == RECORD_TYPE && TYPE_CONTAINS_TEMPLATE_P (type))
+    {
+      tree obj_type = TREE_TYPE (TREE_CHAIN (TYPE_FIELDS (type)));
+
+      /* If the source already has a template, get a reference to the
+	 associated array only, as we are going to rebuild a template
+	 for the target type anyway.  */
+      expr = maybe_unconstrained_array (expr);
+
+      return
+	gnat_build_constructor
+	  (type,
+	   tree_cons (TYPE_FIELDS (type),
+		      build_template (TREE_TYPE (TYPE_FIELDS (type)),
+				      obj_type, NULL_TREE),
+		      tree_cons (TREE_CHAIN (TYPE_FIELDS (type)),
+				 convert (obj_type, expr), NULL_TREE)));
+    }
+
+  /* There are some special cases of expressions that we process
+     specially.  */
+  switch (TREE_CODE (expr))
+    {
+    case ERROR_MARK:
+      return expr;
+
+    case NULL_EXPR:
+      /* Just set its type here.  For TRANSFORM_EXPR, we will do the actual
+	 conversion in gnat_expand_expr.  NULL_EXPR does not represent
+	 and actual value, so no conversion is needed.  */
+      expr = copy_node (expr);
+      TREE_TYPE (expr) = type;
+      return expr;
+
+    case STRING_CST:
+      /* If we are converting a STRING_CST to another constrained array type,
+	 just make a new one in the proper type.  */
+      if (code == ecode && AGGREGATE_TYPE_P (etype)
+	  && !(TREE_CODE (TYPE_SIZE (etype)) == INTEGER_CST
+	       && TREE_CODE (TYPE_SIZE (type)) != INTEGER_CST))
+	{
+	  expr = copy_node (expr);
+	  TREE_TYPE (expr) = type;
+	  return expr;
+	}
+      break;
+
+    case CONSTRUCTOR:
+      /* If we are converting a CONSTRUCTOR to a mere variant type, just make
+	 a new one in the proper type.  */
+      if (code == ecode && gnat_types_compatible_p (type, etype))
+	{
+	  expr = copy_node (expr);
+	  TREE_TYPE (expr) = type;
+	  return expr;
+	}
+
+      /* Likewise for a conversion between original and packable version, but
+	 we have to work harder in order to preserve type consistency.  */
+      if (code == ecode
+	  && code == RECORD_TYPE
+	  && TYPE_NAME (type) == TYPE_NAME (etype))
+	{
+	  VEC(constructor_elt,gc) *e = CONSTRUCTOR_ELTS (expr);
+	  unsigned HOST_WIDE_INT len = VEC_length (constructor_elt, e);
+	  VEC(constructor_elt,gc) *v = VEC_alloc (constructor_elt, gc, len);
+	  tree efield = TYPE_FIELDS (etype), field = TYPE_FIELDS (type);
+	  unsigned HOST_WIDE_INT idx;
+	  tree index, value;
+
+	  FOR_EACH_CONSTRUCTOR_ELT(e, idx, index, value)
+	    {
+	      constructor_elt *elt = VEC_quick_push (constructor_elt, v, NULL);
+	      /* We expect only simple constructors.  Otherwise, punt.  */
+	      if (!(index == efield || index == DECL_ORIGINAL_FIELD (efield)))
+		break;
+	      elt->index = field;
+	      elt->value = convert (TREE_TYPE (field), value);
+	      efield = TREE_CHAIN (efield);
+	      field = TREE_CHAIN (field);
+	    }
+
+	  if (idx == len)
+	    {
+	      expr = copy_node (expr);
+	      TREE_TYPE (expr) = type;
+	      CONSTRUCTOR_ELTS (expr) = v;
+	      return expr;
+	    }
+	}
+      break;
+
+    case UNCONSTRAINED_ARRAY_REF:
+      /* Convert this to the type of the inner array by getting the address of
+	 the array from the template.  */
+      expr = build_unary_op (INDIRECT_REF, NULL_TREE,
+			     build_component_ref (TREE_OPERAND (expr, 0),
+						  get_identifier ("P_ARRAY"),
+						  NULL_TREE, false));
+      etype = TREE_TYPE (expr);
+      ecode = TREE_CODE (etype);
+      break;
+
+    case VIEW_CONVERT_EXPR:
+      {
+	/* GCC 4.x is very sensitive to type consistency overall, and view
+	   conversions thus are very frequent.  Even though just "convert"ing
+	   the inner operand to the output type is fine in most cases, it
+	   might expose unexpected input/output type mismatches in special
+	   circumstances so we avoid such recursive calls when we can.  */
+	tree op0 = TREE_OPERAND (expr, 0);
+
+	/* If we are converting back to the original type, we can just
+	   lift the input conversion.  This is a common occurrence with
+	   switches back-and-forth amongst type variants.  */
+	if (type == TREE_TYPE (op0))
+	  return op0;
+
+	/* Otherwise, if we're converting between two aggregate types, we
+	   might be allowed to substitute the VIEW_CONVERT_EXPR target type
+	   in place or to just convert the inner expression.  */
+	if (AGGREGATE_TYPE_P (type) && AGGREGATE_TYPE_P (etype))
+	  {
+	    /* If we are converting between mere variants, we can just
+	       substitute the VIEW_CONVERT_EXPR in place.  */
+	    if (gnat_types_compatible_p (type, etype))
+	      return build1 (VIEW_CONVERT_EXPR, type, op0);
+
+	    /* Otherwise, we may just bypass the input view conversion unless
+	       one of the types is a fat pointer,  which is handled by
+	       specialized code below which relies on exact type matching.  */
+	    else if (!TYPE_FAT_POINTER_P (type) && !TYPE_FAT_POINTER_P (etype))
+	      return convert (type, op0);
+	  }
+      }
+      break;
+
+    case INDIRECT_REF:
+      /* If both types are record types, just convert the pointer and
+	 make a new INDIRECT_REF.
+
+	 ??? Disable this for now since it causes problems with the
+	 code in build_binary_op for MODIFY_EXPR which wants to
+	 strip off conversions.  But that code really is a mess and
+	 we need to do this a much better way some time.  */
+      if (0
+	  && (TREE_CODE (type) == RECORD_TYPE
+	      || TREE_CODE (type) == UNION_TYPE)
+	  && (TREE_CODE (etype) == RECORD_TYPE
+	      || TREE_CODE (etype) == UNION_TYPE)
+	  && !TYPE_FAT_POINTER_P (type) && !TYPE_FAT_POINTER_P (etype))
+	return build_unary_op (INDIRECT_REF, NULL_TREE,
+			       convert (build_pointer_type (type),
+					TREE_OPERAND (expr, 0)));
+      break;
+
+    default:
+      break;
+    }
+
+  /* Check for converting to a pointer to an unconstrained array.  */
+  if (TYPE_FAT_POINTER_P (type) && !TYPE_FAT_POINTER_P (etype))
+    return convert_to_fat_pointer (type, expr);
+
+  /* If we are converting between two aggregate types that are mere
+     variants, just make a VIEW_CONVERT_EXPR.  */
+  else if (code == ecode
+	   && AGGREGATE_TYPE_P (type)
+	   && gnat_types_compatible_p (type, etype))
+    return build1 (VIEW_CONVERT_EXPR, type, expr);
+
+  /* In all other cases of related types, make a NOP_EXPR.  */
+  else if (TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (etype)
+	   || (code == INTEGER_CST && ecode == INTEGER_CST
+	       && (type == TREE_TYPE (etype) || etype == TREE_TYPE (type))))
+    return fold_convert (type, expr);
+
+  switch (code)
+    {
+    case VOID_TYPE:
+      return fold_build1 (CONVERT_EXPR, type, expr);
+
+    case BOOLEAN_TYPE:
+      return fold_convert (type, gnat_truthvalue_conversion (expr));
+
+    case INTEGER_TYPE:
+      if (TYPE_HAS_ACTUAL_BOUNDS_P (type)
+	  && (ecode == ARRAY_TYPE || ecode == UNCONSTRAINED_ARRAY_TYPE
+	      || (ecode == RECORD_TYPE && TYPE_CONTAINS_TEMPLATE_P (etype))))
+	return unchecked_convert (type, expr, false);
+      else if (TYPE_BIASED_REPRESENTATION_P (type))
+	return fold_convert (type,
+			     fold_build2 (MINUS_EXPR, TREE_TYPE (type),
+					  convert (TREE_TYPE (type), expr),
+					  TYPE_MIN_VALUE (type)));
+
+      /* ... fall through ... */
+
+    case ENUMERAL_TYPE:
+      /* If we are converting an additive expression to an integer type
+	 with lower precision, be wary of the optimization that can be
+	 applied by convert_to_integer.  There are 2 problematic cases:
+	   - if the first operand was originally of a biased type,
+	     because we could be recursively called to convert it
+	     to an intermediate type and thus rematerialize the
+	     additive operator endlessly,
+	   - if the expression contains a placeholder, because an
+	     intermediate conversion that changes the sign could
+	     be inserted and thus introduce an artificial overflow
+	     at compile time when the placeholder is substituted.  */
+      if (code == INTEGER_TYPE
+	  && ecode == INTEGER_TYPE
+	  && TYPE_PRECISION (type) < TYPE_PRECISION (etype)
+	  && (TREE_CODE (expr) == PLUS_EXPR || TREE_CODE (expr) == MINUS_EXPR))
+	{
+	  tree op0 = get_unwidened (TREE_OPERAND (expr, 0), type);
+
+	  if ((TREE_CODE (TREE_TYPE (op0)) == INTEGER_TYPE
+	       && TYPE_BIASED_REPRESENTATION_P (TREE_TYPE (op0)))
+	      || CONTAINS_PLACEHOLDER_P (expr))
+	    return build1 (NOP_EXPR, type, expr);
+	}
+
+      return fold (convert_to_integer (type, expr));
+
+    case POINTER_TYPE:
+    case REFERENCE_TYPE:
+      /* If converting between two pointers to records denoting
+	 both a template and type, adjust if needed to account
+	 for any differing offsets, since one might be negative.  */
+      if (TYPE_THIN_POINTER_P (etype) && TYPE_THIN_POINTER_P (type))
+	{
+	  tree bit_diff
+	    = size_diffop (bit_position (TYPE_FIELDS (TREE_TYPE (etype))),
+			   bit_position (TYPE_FIELDS (TREE_TYPE (type))));
+	  tree byte_diff = size_binop (CEIL_DIV_EXPR, bit_diff,
+				       sbitsize_int (BITS_PER_UNIT));
+
+	  expr = build1 (NOP_EXPR, type, expr);
+	  TREE_CONSTANT (expr) = TREE_CONSTANT (TREE_OPERAND (expr, 0));
+	  if (integer_zerop (byte_diff))
+	    return expr;
+
+	  return build_binary_op (POINTER_PLUS_EXPR, type, expr,
+				  fold (convert (sizetype, byte_diff)));
+	}
+
+      /* If converting to a thin pointer, handle specially.  */
+      if (TYPE_THIN_POINTER_P (type)
+	  && TYPE_UNCONSTRAINED_ARRAY (TREE_TYPE (type)))
+	return convert_to_thin_pointer (type, expr);
+
+      /* If converting fat pointer to normal pointer, get the pointer to the
+	 array and then convert it.  */
+      else if (TYPE_FAT_POINTER_P (etype))
+	expr = build_component_ref (expr, get_identifier ("P_ARRAY"),
+				    NULL_TREE, false);
+
+      return fold (convert_to_pointer (type, expr));
+
+    case REAL_TYPE:
+      return fold (convert_to_real (type, expr));
+
+    case RECORD_TYPE:
+      if (TYPE_JUSTIFIED_MODULAR_P (type) && !AGGREGATE_TYPE_P (etype))
+	return
+	  gnat_build_constructor
+	    (type, tree_cons (TYPE_FIELDS (type),
+			      convert (TREE_TYPE (TYPE_FIELDS (type)), expr),
+			      NULL_TREE));
+
+      /* ... fall through ... */
+
+    case ARRAY_TYPE:
+      /* In these cases, assume the front-end has validated the conversion.
+	 If the conversion is valid, it will be a bit-wise conversion, so
+	 it can be viewed as an unchecked conversion.  */
+      return unchecked_convert (type, expr, false);
+
+    case UNION_TYPE:
+      /* This is a either a conversion between a tagged type and some
+	 subtype, which we have to mark as a UNION_TYPE because of
+	 overlapping fields or a conversion of an Unchecked_Union.  */
+      return unchecked_convert (type, expr, false);
+
+    case UNCONSTRAINED_ARRAY_TYPE:
+      /* If EXPR is a constrained array, take its address, convert it to a
+	 fat pointer, and then dereference it.  Likewise if EXPR is a
+	 record containing both a template and a constrained array.
+	 Note that a record representing a justified modular type
+	 always represents a packed constrained array.  */
+      if (ecode == ARRAY_TYPE
+	  || (ecode == INTEGER_TYPE && TYPE_HAS_ACTUAL_BOUNDS_P (etype))
+	  || (ecode == RECORD_TYPE && TYPE_CONTAINS_TEMPLATE_P (etype))
+	  || (ecode == RECORD_TYPE && TYPE_JUSTIFIED_MODULAR_P (etype)))
+	return
+	  build_unary_op
+	    (INDIRECT_REF, NULL_TREE,
+	     convert_to_fat_pointer (TREE_TYPE (type),
+				     build_unary_op (ADDR_EXPR,
+						     NULL_TREE, expr)));
+
+      /* Do something very similar for converting one unconstrained
+	 array to another.  */
+      else if (ecode == UNCONSTRAINED_ARRAY_TYPE)
+	return
+	  build_unary_op (INDIRECT_REF, NULL_TREE,
+			  convert (TREE_TYPE (type),
+				   build_unary_op (ADDR_EXPR,
+						   NULL_TREE, expr)));
+      else
+	gcc_unreachable ();
+
+    case COMPLEX_TYPE:
+      return fold (convert_to_complex (type, expr));
+
+    default:
+      gcc_unreachable ();
+    }
+}
+
+/* Remove all conversions that are done in EXP.  This includes converting
+   from a padded type or to a justified modular type.  If TRUE_ADDRESS
+   is true, always return the address of the containing object even if
+   the address is not bit-aligned.  */
+
+tree
+remove_conversions (tree exp, bool true_address)
+{
+  switch (TREE_CODE (exp))
+    {
+    case CONSTRUCTOR:
+      if (true_address
+	  && TREE_CODE (TREE_TYPE (exp)) == RECORD_TYPE
+	  && TYPE_JUSTIFIED_MODULAR_P (TREE_TYPE (exp)))
+	return
+	  remove_conversions (VEC_index (constructor_elt,
+					 CONSTRUCTOR_ELTS (exp), 0)->value,
+			      true);
+      break;
+
+    case COMPONENT_REF:
+      if (TREE_CODE (TREE_TYPE (TREE_OPERAND (exp, 0))) == RECORD_TYPE
+	  && TYPE_IS_PADDING_P (TREE_TYPE (TREE_OPERAND (exp, 0))))
+	return remove_conversions (TREE_OPERAND (exp, 0), true_address);
+      break;
+
+    case VIEW_CONVERT_EXPR:  case NON_LVALUE_EXPR:
+    CASE_CONVERT:
+      return remove_conversions (TREE_OPERAND (exp, 0), true_address);
+
+    default:
+      break;
+    }
+
+  return exp;
+}
+
+/* If EXP's type is an UNCONSTRAINED_ARRAY_TYPE, return an expression that
+   refers to the underlying array.  If its type has TYPE_CONTAINS_TEMPLATE_P,
+   likewise return an expression pointing to the underlying array.  */
+
+tree
+maybe_unconstrained_array (tree exp)
+{
+  enum tree_code code = TREE_CODE (exp);
+  tree new;
+
+  switch (TREE_CODE (TREE_TYPE (exp)))
+    {
+    case UNCONSTRAINED_ARRAY_TYPE:
+      if (code == UNCONSTRAINED_ARRAY_REF)
+	{
+	  new
+	    = build_unary_op (INDIRECT_REF, NULL_TREE,
+			      build_component_ref (TREE_OPERAND (exp, 0),
+						   get_identifier ("P_ARRAY"),
+						   NULL_TREE, false));
+	  TREE_READONLY (new) = TREE_STATIC (new) = TREE_READONLY (exp);
+	  return new;
+	}
+
+      else if (code == NULL_EXPR)
+	return build1 (NULL_EXPR,
+		       TREE_TYPE (TREE_TYPE (TYPE_FIELDS
+					     (TREE_TYPE (TREE_TYPE (exp))))),
+		       TREE_OPERAND (exp, 0));
+
+    case RECORD_TYPE:
+      /* If this is a padded type, convert to the unpadded type and see if
+	 it contains a template.  */
+      if (TYPE_IS_PADDING_P (TREE_TYPE (exp)))
+	{
+	  new = convert (TREE_TYPE (TYPE_FIELDS (TREE_TYPE (exp))), exp);
+	  if (TREE_CODE (TREE_TYPE (new)) == RECORD_TYPE
+	      && TYPE_CONTAINS_TEMPLATE_P (TREE_TYPE (new)))
+	    return
+	      build_component_ref (new, NULL_TREE,
+				   TREE_CHAIN (TYPE_FIELDS (TREE_TYPE (new))),
+				   0);
+	}
+      else if (TYPE_CONTAINS_TEMPLATE_P (TREE_TYPE (exp)))
+	return
+	  build_component_ref (exp, NULL_TREE,
+			       TREE_CHAIN (TYPE_FIELDS (TREE_TYPE (exp))), 0);
+      break;
+
+    default:
+      break;
+    }
+
+  return exp;
+}
+
+/* Return an expression that does an unchecked conversion of EXPR to TYPE.
+   If NOTRUNC_P is true, truncation operations should be suppressed.  */
+
+tree
+unchecked_convert (tree type, tree expr, bool notrunc_p)
+{
+  tree etype = TREE_TYPE (expr);
+
+  /* If the expression is already the right type, we are done.  */
+  if (etype == type)
+    return expr;
+
+  /* If both types types are integral just do a normal conversion.
+     Likewise for a conversion to an unconstrained array.  */
+  if ((((INTEGRAL_TYPE_P (type)
+	 && !(TREE_CODE (type) == INTEGER_TYPE
+	      && TYPE_VAX_FLOATING_POINT_P (type)))
+	|| (POINTER_TYPE_P (type) && ! TYPE_THIN_POINTER_P (type))
+	|| (TREE_CODE (type) == RECORD_TYPE
+	    && TYPE_JUSTIFIED_MODULAR_P (type)))
+       && ((INTEGRAL_TYPE_P (etype)
+	    && !(TREE_CODE (etype) == INTEGER_TYPE
+		 && TYPE_VAX_FLOATING_POINT_P (etype)))
+	   || (POINTER_TYPE_P (etype) && !TYPE_THIN_POINTER_P (etype))
+	   || (TREE_CODE (etype) == RECORD_TYPE
+	       && TYPE_JUSTIFIED_MODULAR_P (etype))))
+      || TREE_CODE (type) == UNCONSTRAINED_ARRAY_TYPE)
+    {
+      tree rtype = type;
+      bool final_unchecked = false;
+
+      if (TREE_CODE (etype) == INTEGER_TYPE
+	  && TYPE_BIASED_REPRESENTATION_P (etype))
+	{
+	  tree ntype = copy_type (etype);
+
+	  TYPE_BIASED_REPRESENTATION_P (ntype) = 0;
+	  TYPE_MAIN_VARIANT (ntype) = ntype;
+	  expr = build1 (NOP_EXPR, ntype, expr);
+	}
+
+      if (TREE_CODE (type) == INTEGER_TYPE
+	  && TYPE_BIASED_REPRESENTATION_P (type))
+	{
+	  rtype = copy_type (type);
+	  TYPE_BIASED_REPRESENTATION_P (rtype) = 0;
+	  TYPE_MAIN_VARIANT (rtype) = rtype;
+	}
+
+      /* We have another special case: if we are unchecked converting subtype
+	 into a base type, we need to ensure that VRP doesn't propagate range
+	 information since this conversion may be done precisely to validate
+	 that the object is within the range it is supposed to have.  */
+      else if (TREE_CODE (expr) != INTEGER_CST
+	       && TREE_CODE (type) == INTEGER_TYPE && !TREE_TYPE (type)
+	       && ((TREE_CODE (etype) == INTEGER_TYPE && TREE_TYPE (etype))
+		   || TREE_CODE (etype) == ENUMERAL_TYPE
+		   || TREE_CODE (etype) == BOOLEAN_TYPE))
+	{
+	  /* The optimization barrier is a VIEW_CONVERT_EXPR node; moreover,
+	     in order not to be deemed an useless type conversion, it must
+	     be from subtype to base type.
+
+	     ??? This may raise addressability and/or aliasing issues because
+	     VIEW_CONVERT_EXPR gets gimplified as an lvalue, thus causing the
+	     address of its operand to be taken if it is deemed addressable
+	     and not already in GIMPLE form.  */
+	  rtype = gnat_type_for_mode (TYPE_MODE (type), TYPE_UNSIGNED (type));
+	  rtype = copy_type (rtype);
+	  TYPE_MAIN_VARIANT (rtype) = rtype;
+	  TREE_TYPE (rtype) = type;
+	  final_unchecked = true;
+	}
+
+      expr = convert (rtype, expr);
+      if (type != rtype)
+	expr = fold_build1 (final_unchecked ? VIEW_CONVERT_EXPR : NOP_EXPR,
+			    type, expr);
+    }
+
+  /* If we are converting TO an integral type whose precision is not the
+     same as its size, first unchecked convert to a record that contains
+     an object of the output type.  Then extract the field. */
+  else if (INTEGRAL_TYPE_P (type) && TYPE_RM_SIZE (type)
+	   && 0 != compare_tree_int (TYPE_RM_SIZE (type),
+				     GET_MODE_BITSIZE (TYPE_MODE (type))))
+    {
+      tree rec_type = make_node (RECORD_TYPE);
+      tree field = create_field_decl (get_identifier ("OBJ"), type,
+				      rec_type, 1, 0, 0, 0);
+
+      TYPE_FIELDS (rec_type) = field;
+      layout_type (rec_type);
+
+      expr = unchecked_convert (rec_type, expr, notrunc_p);
+      expr = build_component_ref (expr, NULL_TREE, field, 0);
+    }
+
+  /* Similarly for integral input type whose precision is not equal to its
+     size.  */
+  else if (INTEGRAL_TYPE_P (etype) && TYPE_RM_SIZE (etype)
+      && 0 != compare_tree_int (TYPE_RM_SIZE (etype),
+				GET_MODE_BITSIZE (TYPE_MODE (etype))))
+    {
+      tree rec_type = make_node (RECORD_TYPE);
+      tree field
+	= create_field_decl (get_identifier ("OBJ"), etype, rec_type,
+			     1, 0, 0, 0);
+
+      TYPE_FIELDS (rec_type) = field;
+      layout_type (rec_type);
+
+      expr = gnat_build_constructor (rec_type, build_tree_list (field, expr));
+      expr = unchecked_convert (type, expr, notrunc_p);
+    }
+
+  /* We have a special case when we are converting between two
+     unconstrained array types.  In that case, take the address,
+     convert the fat pointer types, and dereference.  */
+  else if (TREE_CODE (etype) == UNCONSTRAINED_ARRAY_TYPE
+	   && TREE_CODE (type) == UNCONSTRAINED_ARRAY_TYPE)
+    expr = build_unary_op (INDIRECT_REF, NULL_TREE,
+			   build1 (VIEW_CONVERT_EXPR, TREE_TYPE (type),
+				   build_unary_op (ADDR_EXPR, NULL_TREE,
+						   expr)));
+  else
+    {
+      expr = maybe_unconstrained_array (expr);
+      etype = TREE_TYPE (expr);
+      expr = fold_build1 (VIEW_CONVERT_EXPR, type, expr);
+    }
+
+  /* If the result is an integral type whose size is not equal to
+     the size of the underlying machine type, sign- or zero-extend
+     the result.  We need not do this in the case where the input is
+     an integral type of the same precision and signedness or if the output
+     is a biased type or if both the input and output are unsigned.  */
+  if (!notrunc_p
+      && INTEGRAL_TYPE_P (type) && TYPE_RM_SIZE (type)
+      && !(TREE_CODE (type) == INTEGER_TYPE
+	   && TYPE_BIASED_REPRESENTATION_P (type))
+      && 0 != compare_tree_int (TYPE_RM_SIZE (type),
+				GET_MODE_BITSIZE (TYPE_MODE (type)))
+      && !(INTEGRAL_TYPE_P (etype)
+	   && TYPE_UNSIGNED (type) == TYPE_UNSIGNED (etype)
+	   && operand_equal_p (TYPE_RM_SIZE (type),
+			       (TYPE_RM_SIZE (etype) != 0
+				? TYPE_RM_SIZE (etype) : TYPE_SIZE (etype)),
+			       0))
+      && !(TYPE_UNSIGNED (type) && TYPE_UNSIGNED (etype)))
+    {
+      tree base_type = gnat_type_for_mode (TYPE_MODE (type),
+					   TYPE_UNSIGNED (type));
+      tree shift_expr
+	= convert (base_type,
+		   size_binop (MINUS_EXPR,
+			       bitsize_int
+			       (GET_MODE_BITSIZE (TYPE_MODE (type))),
+			       TYPE_RM_SIZE (type)));
+      expr
+	= convert (type,
+		   build_binary_op (RSHIFT_EXPR, base_type,
+				    build_binary_op (LSHIFT_EXPR, base_type,
+						     convert (base_type, expr),
+						     shift_expr),
+				    shift_expr));
+    }
+
+  /* An unchecked conversion should never raise Constraint_Error.  The code
+     below assumes that GCC's conversion routines overflow the same way that
+     the underlying hardware does.  This is probably true.  In the rare case
+     when it is false, we can rely on the fact that such conversions are
+     erroneous anyway.  */
+  if (TREE_CODE (expr) == INTEGER_CST)
+    TREE_OVERFLOW (expr) = 0;
+
+  /* If the sizes of the types differ and this is an VIEW_CONVERT_EXPR,
+     show no longer constant.  */
+  if (TREE_CODE (expr) == VIEW_CONVERT_EXPR
+      && !operand_equal_p (TYPE_SIZE_UNIT (type), TYPE_SIZE_UNIT (etype),
+			   OEP_ONLY_CONST))
+    TREE_CONSTANT (expr) = 0;
+
+  return expr;
+}
+
+/* Return the appropriate GCC tree code for the specified GNAT type,
+   the latter being a record type as predicated by Is_Record_Type.  */
+
+enum tree_code
+tree_code_for_record_type (Entity_Id gnat_type)
+{
+  Node_Id component_list
+    = Component_List (Type_Definition
+		      (Declaration_Node
+		       (Implementation_Base_Type (gnat_type))));
+  Node_Id component;
+
+ /* Make this a UNION_TYPE unless it's either not an Unchecked_Union or
+    we have a non-discriminant field outside a variant.  In either case,
+    it's a RECORD_TYPE.  */
+
+  if (!Is_Unchecked_Union (gnat_type))
+    return RECORD_TYPE;
+
+  for (component = First_Non_Pragma (Component_Items (component_list));
+       Present (component);
+       component = Next_Non_Pragma (component))
+    if (Ekind (Defining_Entity (component)) == E_Component)
+      return RECORD_TYPE;
+
+  return UNION_TYPE;
+}
+
+/* Return true if GNU_TYPE is suitable as the type of a non-aliased
+   component of an aggregate type.  */
+
+bool
+type_for_nonaliased_component_p (tree gnu_type)
+{
+  /* If the type is passed by reference, we may have pointers to the
+     component so it cannot be made non-aliased. */
+  if (must_pass_by_ref (gnu_type) || default_pass_by_ref (gnu_type))
+    return false;
+
+  /* We used to say that any component of aggregate type is aliased
+     because the front-end may take 'Reference of it.  The front-end
+     has been enhanced in the meantime so as to use a renaming instead
+     in most cases, but the back-end can probably take the address of
+     such a component too so we go for the conservative stance.
+
+     For instance, we might need the address of any array type, even
+     if normally passed by copy, to construct a fat pointer if the
+     component is used as an actual for an unconstrained formal.
+
+     Likewise for record types: even if a specific record subtype is
+     passed by copy, the parent type might be passed by ref (e.g. if
+     it's of variable size) and we might take the address of a child
+     component to pass to a parent formal.  We have no way to check
+     for such conditions here.  */
+  if (AGGREGATE_TYPE_P (gnu_type))
+    return false;
+
+  return true;
+}
+
+/* Perform final processing on global variables.  */
+
+void
+gnat_write_global_declarations (void)
+{
+  /* Proceed to optimize and emit assembly.
+     FIXME: shouldn't be the front end's responsibility to call this.  */
+  cgraph_optimize ();
+
+  /* Emit debug info for all global declarations.  */
+  emit_debug_global_declarations (VEC_address (tree, global_decls),
+				  VEC_length (tree, global_decls));
+}
+
+/* ************************************************************************
+ * *                           GCC builtins support                       *
+ * ************************************************************************ */
+
+/* The general scheme is fairly simple:
+
+   For each builtin function/type to be declared, gnat_install_builtins calls
+   internal facilities which eventually get to gnat_push_decl, which in turn
+   tracks the so declared builtin function decls in the 'builtin_decls' global
+   datastructure. When an Intrinsic subprogram declaration is processed, we
+   search this global datastructure to retrieve the associated BUILT_IN DECL
+   node.  */
+
+/* Search the chain of currently available builtin declarations for a node
+   corresponding to function NAME (an IDENTIFIER_NODE).  Return the first node
+   found, if any, or NULL_TREE otherwise.  */
+tree
+builtin_decl_for (tree name)
+{
+  unsigned i;
+  tree decl;
+
+  for (i = 0; VEC_iterate(tree, builtin_decls, i, decl); i++)
+    if (DECL_NAME (decl) == name)
+      return decl;
+
+  return NULL_TREE;
+}
+
+/* The code below eventually exposes gnat_install_builtins, which declares
+   the builtin types and functions we might need, either internally or as
+   user accessible facilities.
+
+   ??? This is a first implementation shot, still in rough shape.  It is
+   heavily inspired from the "C" family implementation, with chunks copied
+   verbatim from there.
+
+   Two obvious TODO candidates are
+   o Use a more efficient name/decl mapping scheme
+   o Devise a middle-end infrastructure to avoid having to copy
+     pieces between front-ends.  */
+
+/* ----------------------------------------------------------------------- *
+ *                         BUILTIN ELEMENTARY TYPES                        *
+ * ----------------------------------------------------------------------- */
+
+/* Standard data types to be used in builtin argument declarations.  */
+
+enum c_tree_index
+{
+    CTI_SIGNED_SIZE_TYPE, /* For format checking only.  */
+    CTI_STRING_TYPE,
+    CTI_CONST_STRING_TYPE,
+
+    CTI_MAX
+};
+
+static tree c_global_trees[CTI_MAX];
+
+#define signed_size_type_node	c_global_trees[CTI_SIGNED_SIZE_TYPE]
+#define string_type_node	c_global_trees[CTI_STRING_TYPE]
+#define const_string_type_node	c_global_trees[CTI_CONST_STRING_TYPE]
+
+/* ??? In addition some attribute handlers, we currently don't support a
+   (small) number of builtin-types, which in turns inhibits support for a
+   number of builtin functions.  */
+#define wint_type_node    void_type_node
+#define intmax_type_node  void_type_node
+#define uintmax_type_node void_type_node
+
+/* Build the void_list_node (void_type_node having been created).  */
+
+static tree
+build_void_list_node (void)
+{
+  tree t = build_tree_list (NULL_TREE, void_type_node);
+  return t;
+}
+
+/* Used to help initialize the builtin-types.def table.  When a type of
+   the correct size doesn't exist, use error_mark_node instead of NULL.
+   The later results in segfaults even when a decl using the type doesn't
+   get invoked.  */
+
+static tree
+builtin_type_for_size (int size, bool unsignedp)
+{
+  tree type = lang_hooks.types.type_for_size (size, unsignedp);
+  return type ? type : error_mark_node;
+}
+
+/* Build/push the elementary type decls that builtin functions/types
+   will need.  */
+
+static void
+install_builtin_elementary_types (void)
+{
+  signed_size_type_node = size_type_node;
+  pid_type_node = integer_type_node;
+  void_list_node = build_void_list_node ();
+
+  string_type_node = build_pointer_type (char_type_node);
+  const_string_type_node
+    = build_pointer_type (build_qualified_type
+			  (char_type_node, TYPE_QUAL_CONST));
+}
+
+/* ----------------------------------------------------------------------- *
+ *                          BUILTIN FUNCTION TYPES                         *
+ * ----------------------------------------------------------------------- */
+
+/* Now, builtin function types per se.  */
+
+enum c_builtin_type
+{
+#define DEF_PRIMITIVE_TYPE(NAME, VALUE) NAME,
+#define DEF_FUNCTION_TYPE_0(NAME, RETURN) NAME,
+#define DEF_FUNCTION_TYPE_1(NAME, RETURN, ARG1) NAME,
+#define DEF_FUNCTION_TYPE_2(NAME, RETURN, ARG1, ARG2) NAME,
+#define DEF_FUNCTION_TYPE_3(NAME, RETURN, ARG1, ARG2, ARG3) NAME,
+#define DEF_FUNCTION_TYPE_4(NAME, RETURN, ARG1, ARG2, ARG3, ARG4) NAME,
+#define DEF_FUNCTION_TYPE_5(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5) NAME,
+#define DEF_FUNCTION_TYPE_6(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, ARG6) NAME,
+#define DEF_FUNCTION_TYPE_7(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, ARG6, ARG7) NAME,
+#define DEF_FUNCTION_TYPE_VAR_0(NAME, RETURN) NAME,
+#define DEF_FUNCTION_TYPE_VAR_1(NAME, RETURN, ARG1) NAME,
+#define DEF_FUNCTION_TYPE_VAR_2(NAME, RETURN, ARG1, ARG2) NAME,
+#define DEF_FUNCTION_TYPE_VAR_3(NAME, RETURN, ARG1, ARG2, ARG3) NAME,
+#define DEF_FUNCTION_TYPE_VAR_4(NAME, RETURN, ARG1, ARG2, ARG3, ARG4) NAME,
+#define DEF_FUNCTION_TYPE_VAR_5(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG6) \
+  NAME,
+#define DEF_POINTER_TYPE(NAME, TYPE) NAME,
+#include "builtin-types.def"
+#undef DEF_PRIMITIVE_TYPE
+#undef DEF_FUNCTION_TYPE_0
+#undef DEF_FUNCTION_TYPE_1
+#undef DEF_FUNCTION_TYPE_2
+#undef DEF_FUNCTION_TYPE_3
+#undef DEF_FUNCTION_TYPE_4
+#undef DEF_FUNCTION_TYPE_5
+#undef DEF_FUNCTION_TYPE_6
+#undef DEF_FUNCTION_TYPE_7
+#undef DEF_FUNCTION_TYPE_VAR_0
+#undef DEF_FUNCTION_TYPE_VAR_1
+#undef DEF_FUNCTION_TYPE_VAR_2
+#undef DEF_FUNCTION_TYPE_VAR_3
+#undef DEF_FUNCTION_TYPE_VAR_4
+#undef DEF_FUNCTION_TYPE_VAR_5
+#undef DEF_POINTER_TYPE
+  BT_LAST
+};
+
+typedef enum c_builtin_type builtin_type;
+
+/* A temporary array used in communication with def_fn_type.  */
+static GTY(()) tree builtin_types[(int) BT_LAST + 1];
+
+/* A helper function for install_builtin_types.  Build function type
+   for DEF with return type RET and N arguments.  If VAR is true, then the
+   function should be variadic after those N arguments.
+
+   Takes special care not to ICE if any of the types involved are
+   error_mark_node, which indicates that said type is not in fact available
+   (see builtin_type_for_size).  In which case the function type as a whole
+   should be error_mark_node.  */
+
+static void
+def_fn_type (builtin_type def, builtin_type ret, bool var, int n, ...)
+{
+  tree args = NULL, t;
+  va_list list;
+  int i;
+
+  va_start (list, n);
+  for (i = 0; i < n; ++i)
+    {
+      builtin_type a = va_arg (list, builtin_type);
+      t = builtin_types[a];
+      if (t == error_mark_node)
+	goto egress;
+      args = tree_cons (NULL_TREE, t, args);
+    }
+  va_end (list);
+
+  args = nreverse (args);
+  if (!var)
+    args = chainon (args, void_list_node);
+
+  t = builtin_types[ret];
+  if (t == error_mark_node)
+    goto egress;
+  t = build_function_type (t, args);
+
+ egress:
+  builtin_types[def] = t;
+}
+
+/* Build the builtin function types and install them in the builtin_types
+   array for later use in builtin function decls.  */
+
+static void
+install_builtin_function_types (void)
+{
+  tree va_list_ref_type_node;
+  tree va_list_arg_type_node;
+
+  if (TREE_CODE (va_list_type_node) == ARRAY_TYPE)
+    {
+      va_list_arg_type_node = va_list_ref_type_node =
+	build_pointer_type (TREE_TYPE (va_list_type_node));
+    }
+  else
+    {
+      va_list_arg_type_node = va_list_type_node;
+      va_list_ref_type_node = build_reference_type (va_list_type_node);
+    }
+
+#define DEF_PRIMITIVE_TYPE(ENUM, VALUE) \
+  builtin_types[ENUM] = VALUE;
+#define DEF_FUNCTION_TYPE_0(ENUM, RETURN) \
+  def_fn_type (ENUM, RETURN, 0, 0);
+#define DEF_FUNCTION_TYPE_1(ENUM, RETURN, ARG1) \
+  def_fn_type (ENUM, RETURN, 0, 1, ARG1);
+#define DEF_FUNCTION_TYPE_2(ENUM, RETURN, ARG1, ARG2) \
+  def_fn_type (ENUM, RETURN, 0, 2, ARG1, ARG2);
+#define DEF_FUNCTION_TYPE_3(ENUM, RETURN, ARG1, ARG2, ARG3) \
+  def_fn_type (ENUM, RETURN, 0, 3, ARG1, ARG2, ARG3);
+#define DEF_FUNCTION_TYPE_4(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4) \
+  def_fn_type (ENUM, RETURN, 0, 4, ARG1, ARG2, ARG3, ARG4);
+#define DEF_FUNCTION_TYPE_5(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5)	\
+  def_fn_type (ENUM, RETURN, 0, 5, ARG1, ARG2, ARG3, ARG4, ARG5);
+#define DEF_FUNCTION_TYPE_6(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \
+			    ARG6)					\
+  def_fn_type (ENUM, RETURN, 0, 6, ARG1, ARG2, ARG3, ARG4, ARG5, ARG6);
+#define DEF_FUNCTION_TYPE_7(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \
+			    ARG6, ARG7)					\
+  def_fn_type (ENUM, RETURN, 0, 7, ARG1, ARG2, ARG3, ARG4, ARG5, ARG6, ARG7);
+#define DEF_FUNCTION_TYPE_VAR_0(ENUM, RETURN) \
+  def_fn_type (ENUM, RETURN, 1, 0);
+#define DEF_FUNCTION_TYPE_VAR_1(ENUM, RETURN, ARG1) \
+  def_fn_type (ENUM, RETURN, 1, 1, ARG1);
+#define DEF_FUNCTION_TYPE_VAR_2(ENUM, RETURN, ARG1, ARG2) \
+  def_fn_type (ENUM, RETURN, 1, 2, ARG1, ARG2);
+#define DEF_FUNCTION_TYPE_VAR_3(ENUM, RETURN, ARG1, ARG2, ARG3) \
+  def_fn_type (ENUM, RETURN, 1, 3, ARG1, ARG2, ARG3);
+#define DEF_FUNCTION_TYPE_VAR_4(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4) \
+  def_fn_type (ENUM, RETURN, 1, 4, ARG1, ARG2, ARG3, ARG4);
+#define DEF_FUNCTION_TYPE_VAR_5(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5) \
+  def_fn_type (ENUM, RETURN, 1, 5, ARG1, ARG2, ARG3, ARG4, ARG5);
+#define DEF_POINTER_TYPE(ENUM, TYPE) \
+  builtin_types[(int) ENUM] = build_pointer_type (builtin_types[(int) TYPE]);
+
+#include "builtin-types.def"
+
+#undef DEF_PRIMITIVE_TYPE
+#undef DEF_FUNCTION_TYPE_1
+#undef DEF_FUNCTION_TYPE_2
+#undef DEF_FUNCTION_TYPE_3
+#undef DEF_FUNCTION_TYPE_4
+#undef DEF_FUNCTION_TYPE_5
+#undef DEF_FUNCTION_TYPE_6
+#undef DEF_FUNCTION_TYPE_VAR_0
+#undef DEF_FUNCTION_TYPE_VAR_1
+#undef DEF_FUNCTION_TYPE_VAR_2
+#undef DEF_FUNCTION_TYPE_VAR_3
+#undef DEF_FUNCTION_TYPE_VAR_4
+#undef DEF_FUNCTION_TYPE_VAR_5
+#undef DEF_POINTER_TYPE
+  builtin_types[(int) BT_LAST] = NULL_TREE;
+}
+
+/* ----------------------------------------------------------------------- *
+ *                            BUILTIN ATTRIBUTES                           *
+ * ----------------------------------------------------------------------- */
+
+enum built_in_attribute
+{
+#define DEF_ATTR_NULL_TREE(ENUM) ENUM,
+#define DEF_ATTR_INT(ENUM, VALUE) ENUM,
+#define DEF_ATTR_IDENT(ENUM, STRING) ENUM,
+#define DEF_ATTR_TREE_LIST(ENUM, PURPOSE, VALUE, CHAIN) ENUM,
+#include "builtin-attrs.def"
+#undef DEF_ATTR_NULL_TREE
+#undef DEF_ATTR_INT
+#undef DEF_ATTR_IDENT
+#undef DEF_ATTR_TREE_LIST
+  ATTR_LAST
+};
+
+static GTY(()) tree built_in_attributes[(int) ATTR_LAST];
+
+static void
+install_builtin_attributes (void)
+{
+  /* Fill in the built_in_attributes array.  */
+#define DEF_ATTR_NULL_TREE(ENUM)				\
+  built_in_attributes[(int) ENUM] = NULL_TREE;
+#define DEF_ATTR_INT(ENUM, VALUE)				\
+  built_in_attributes[(int) ENUM] = build_int_cst (NULL_TREE, VALUE);
+#define DEF_ATTR_IDENT(ENUM, STRING)				\
+  built_in_attributes[(int) ENUM] = get_identifier (STRING);
+#define DEF_ATTR_TREE_LIST(ENUM, PURPOSE, VALUE, CHAIN)	\
+  built_in_attributes[(int) ENUM]			\
+    = tree_cons (built_in_attributes[(int) PURPOSE],	\
+		 built_in_attributes[(int) VALUE],	\
+		 built_in_attributes[(int) CHAIN]);
+#include "builtin-attrs.def"
+#undef DEF_ATTR_NULL_TREE
+#undef DEF_ATTR_INT
+#undef DEF_ATTR_IDENT
+#undef DEF_ATTR_TREE_LIST
+}
+
+/* Handle a "const" attribute; arguments as in
+   struct attribute_spec.handler.  */
+
+static tree
+handle_const_attribute (tree *node, tree ARG_UNUSED (name),
+			tree ARG_UNUSED (args), int ARG_UNUSED (flags),
+			bool *no_add_attrs)
+{
+  if (TREE_CODE (*node) == FUNCTION_DECL)
+    TREE_READONLY (*node) = 1;
+  else
+    *no_add_attrs = true;
+
+  return NULL_TREE;
+}
+
+/* Handle a "nothrow" attribute; arguments as in
+   struct attribute_spec.handler.  */
+
+static tree
+handle_nothrow_attribute (tree *node, tree ARG_UNUSED (name),
+			  tree ARG_UNUSED (args), int ARG_UNUSED (flags),
+			  bool *no_add_attrs)
+{
+  if (TREE_CODE (*node) == FUNCTION_DECL)
+    TREE_NOTHROW (*node) = 1;
+  else
+    *no_add_attrs = true;
+
+  return NULL_TREE;
+}
+
+/* Handle a "pure" attribute; arguments as in
+   struct attribute_spec.handler.  */
+
+static tree
+handle_pure_attribute (tree *node, tree name, tree ARG_UNUSED (args),
+		       int ARG_UNUSED (flags), bool *no_add_attrs)
+{
+  if (TREE_CODE (*node) == FUNCTION_DECL)
+    DECL_PURE_P (*node) = 1;
+  /* ??? TODO: Support types.  */
+  else
+    {
+      warning (OPT_Wattributes, "%qE attribute ignored", name);
+      *no_add_attrs = true;
+    }
+
+  return NULL_TREE;
+}
+
+/* Handle a "no vops" attribute; arguments as in
+   struct attribute_spec.handler.  */
+
+static tree
+handle_novops_attribute (tree *node, tree ARG_UNUSED (name),
+			 tree ARG_UNUSED (args), int ARG_UNUSED (flags),
+			 bool *ARG_UNUSED (no_add_attrs))
+{
+  gcc_assert (TREE_CODE (*node) == FUNCTION_DECL);
+  DECL_IS_NOVOPS (*node) = 1;
+  return NULL_TREE;
+}
+
+/* Helper for nonnull attribute handling; fetch the operand number
+   from the attribute argument list.  */
+
+static bool
+get_nonnull_operand (tree arg_num_expr, unsigned HOST_WIDE_INT *valp)
+{
+  /* Verify the arg number is a constant.  */
+  if (TREE_CODE (arg_num_expr) != INTEGER_CST
+      || TREE_INT_CST_HIGH (arg_num_expr) != 0)
+    return false;
+
+  *valp = TREE_INT_CST_LOW (arg_num_expr);
+  return true;
+}
+
+/* Handle the "nonnull" attribute.  */
+static tree
+handle_nonnull_attribute (tree *node, tree ARG_UNUSED (name),
+			  tree args, int ARG_UNUSED (flags),
+			  bool *no_add_attrs)
+{
+  tree type = *node;
+  unsigned HOST_WIDE_INT attr_arg_num;
+
+  /* If no arguments are specified, all pointer arguments should be
+     non-null.  Verify a full prototype is given so that the arguments
+     will have the correct types when we actually check them later.  */
+  if (!args)
+    {
+      if (!TYPE_ARG_TYPES (type))
+	{
+	  error ("nonnull attribute without arguments on a non-prototype");
+	  *no_add_attrs = true;
+	}
+      return NULL_TREE;
+    }
+
+  /* Argument list specified.  Verify that each argument number references
+     a pointer argument.  */
+  for (attr_arg_num = 1; args; args = TREE_CHAIN (args))
+    {
+      tree argument;
+      unsigned HOST_WIDE_INT arg_num = 0, ck_num;
+
+      if (!get_nonnull_operand (TREE_VALUE (args), &arg_num))
+	{
+	  error ("nonnull argument has invalid operand number (argument %lu)",
+		 (unsigned long) attr_arg_num);
+	  *no_add_attrs = true;
+	  return NULL_TREE;
+	}
+
+      argument = TYPE_ARG_TYPES (type);
+      if (argument)
+	{
+	  for (ck_num = 1; ; ck_num++)
+	    {
+	      if (!argument || ck_num == arg_num)
+		break;
+	      argument = TREE_CHAIN (argument);
+	    }
+
+	  if (!argument
+	      || TREE_CODE (TREE_VALUE (argument)) == VOID_TYPE)
+	    {
+	      error ("nonnull argument with out-of-range operand number (argument %lu, operand %lu)",
+		     (unsigned long) attr_arg_num, (unsigned long) arg_num);
+	      *no_add_attrs = true;
+	      return NULL_TREE;
+	    }
+
+	  if (TREE_CODE (TREE_VALUE (argument)) != POINTER_TYPE)
+	    {
+	      error ("nonnull argument references non-pointer operand (argument %lu, operand %lu)",
+		   (unsigned long) attr_arg_num, (unsigned long) arg_num);
+	      *no_add_attrs = true;
+	      return NULL_TREE;
+	    }
+	}
+    }
+
+  return NULL_TREE;
+}
+
+/* Handle a "sentinel" attribute.  */
+
+static tree
+handle_sentinel_attribute (tree *node, tree name, tree args,
+			   int ARG_UNUSED (flags), bool *no_add_attrs)
+{
+  tree params = TYPE_ARG_TYPES (*node);
+
+  if (!params)
+    {
+      warning (OPT_Wattributes,
+	       "%qE attribute requires prototypes with named arguments", name);
+      *no_add_attrs = true;
+    }
+  else
+    {
+      while (TREE_CHAIN (params))
+	params = TREE_CHAIN (params);
+
+      if (VOID_TYPE_P (TREE_VALUE (params)))
+        {
+	  warning (OPT_Wattributes,
+		   "%qE attribute only applies to variadic functions", name);
+	  *no_add_attrs = true;
+	}
+    }
+
+  if (args)
+    {
+      tree position = TREE_VALUE (args);
+
+      if (TREE_CODE (position) != INTEGER_CST)
+        {
+	  warning (0, "requested position is not an integer constant");
+	  *no_add_attrs = true;
+	}
+      else
+        {
+	  if (tree_int_cst_lt (position, integer_zero_node))
+	    {
+	      warning (0, "requested position is less than zero");
+	      *no_add_attrs = true;
+	    }
+	}
+    }
+
+  return NULL_TREE;
+}
+
+/* Handle a "noreturn" attribute; arguments as in
+   struct attribute_spec.handler.  */
+
+static tree
+handle_noreturn_attribute (tree *node, tree name, tree ARG_UNUSED (args),
+			   int ARG_UNUSED (flags), bool *no_add_attrs)
+{
+  tree type = TREE_TYPE (*node);
+
+  /* See FIXME comment in c_common_attribute_table.  */
+  if (TREE_CODE (*node) == FUNCTION_DECL)
+    TREE_THIS_VOLATILE (*node) = 1;
+  else if (TREE_CODE (type) == POINTER_TYPE
+	   && TREE_CODE (TREE_TYPE (type)) == FUNCTION_TYPE)
+    TREE_TYPE (*node)
+      = build_pointer_type
+	(build_type_variant (TREE_TYPE (type),
+			     TYPE_READONLY (TREE_TYPE (type)), 1));
+  else
+    {
+      warning (OPT_Wattributes, "%qE attribute ignored", name);
+      *no_add_attrs = true;
+    }
+
+  return NULL_TREE;
+}
+
+/* Handle a "malloc" attribute; arguments as in
+   struct attribute_spec.handler.  */
+
+static tree
+handle_malloc_attribute (tree *node, tree name, tree ARG_UNUSED (args),
+			 int ARG_UNUSED (flags), bool *no_add_attrs)
+{
+  if (TREE_CODE (*node) == FUNCTION_DECL
+      && POINTER_TYPE_P (TREE_TYPE (TREE_TYPE (*node))))
+    DECL_IS_MALLOC (*node) = 1;
+  else
+    {
+      warning (OPT_Wattributes, "%qE attribute ignored", name);
+      *no_add_attrs = true;
+    }
+
+  return NULL_TREE;
+}
+
+/* Fake handler for attributes we don't properly support.  */
+
+tree
+fake_attribute_handler (tree * ARG_UNUSED (node),
+			tree ARG_UNUSED (name),
+			tree ARG_UNUSED (args),
+			int  ARG_UNUSED (flags),
+			bool * ARG_UNUSED (no_add_attrs))
+{
+  return NULL_TREE;
+}
+
+/* Handle a "type_generic" attribute.  */
+
+static tree
+handle_type_generic_attribute (tree *node, tree ARG_UNUSED (name),
+			       tree ARG_UNUSED (args), int ARG_UNUSED (flags),
+			       bool * ARG_UNUSED (no_add_attrs))
+{
+  tree params;
+  
+  /* Ensure we have a function type.  */
+  gcc_assert (TREE_CODE (*node) == FUNCTION_TYPE);
+  
+  params = TYPE_ARG_TYPES (*node);
+  while (params && ! VOID_TYPE_P (TREE_VALUE (params)))
+    params = TREE_CHAIN (params);
+
+  /* Ensure we have a variadic function.  */
+  gcc_assert (!params);
+
+  return NULL_TREE;
+}
+
+/* ----------------------------------------------------------------------- *
+ *                              BUILTIN FUNCTIONS                          *
+ * ----------------------------------------------------------------------- */
+
+/* Worker for DEF_BUILTIN.  Possibly define a builtin function with one or two
+   names.  Does not declare a non-__builtin_ function if flag_no_builtin, or
+   if nonansi_p and flag_no_nonansi_builtin.  */
+
+static void
+def_builtin_1 (enum built_in_function fncode,
+	       const char *name,
+	       enum built_in_class fnclass,
+	       tree fntype, tree libtype,
+	       bool both_p, bool fallback_p,
+	       bool nonansi_p ATTRIBUTE_UNUSED,
+	       tree fnattrs, bool implicit_p)
+{
+  tree decl;
+  const char *libname;
+
+  /* Preserve an already installed decl.  It most likely was setup in advance
+     (e.g. as part of the internal builtins) for specific reasons.  */
+  if (built_in_decls[(int) fncode] != NULL_TREE)
+    return;
+
+  gcc_assert ((!both_p && !fallback_p)
+	      || !strncmp (name, "__builtin_",
+			   strlen ("__builtin_")));
+
+  libname = name + strlen ("__builtin_");
+  decl = add_builtin_function (name, fntype, fncode, fnclass,
+			       (fallback_p ? libname : NULL),
+			       fnattrs);
+  if (both_p)
+    /* ??? This is normally further controlled by command-line options
+       like -fno-builtin, but we don't have them for Ada.  */
+    add_builtin_function (libname, libtype, fncode, fnclass,
+			  NULL, fnattrs);
+
+  built_in_decls[(int) fncode] = decl;
+  if (implicit_p)
+    implicit_built_in_decls[(int) fncode] = decl;
+}
+
+static int flag_isoc94 = 0;
+static int flag_isoc99 = 0;
+
+/* Install what the common builtins.def offers.  */
+
+static void
+install_builtin_functions (void)
+{
+#define DEF_BUILTIN(ENUM, NAME, CLASS, TYPE, LIBTYPE, BOTH_P, FALLBACK_P, \
+		    NONANSI_P, ATTRS, IMPLICIT, COND)			\
+  if (NAME && COND)							\
+    def_builtin_1 (ENUM, NAME, CLASS,                                   \
+                   builtin_types[(int) TYPE],                           \
+                   builtin_types[(int) LIBTYPE],                        \
+                   BOTH_P, FALLBACK_P, NONANSI_P,                       \
+                   built_in_attributes[(int) ATTRS], IMPLICIT);
+#include "builtins.def"
+#undef DEF_BUILTIN
+}
+
+/* ----------------------------------------------------------------------- *
+ *                              BUILTIN FUNCTIONS                          *
+ * ----------------------------------------------------------------------- */
+
+/* Install the builtin functions we might need.  */
+
+void
+gnat_install_builtins (void)
+{
+  install_builtin_elementary_types ();
+  install_builtin_function_types ();
+  install_builtin_attributes ();
+
+  /* Install builtins used by generic middle-end pieces first.  Some of these
+     know about internal specificities and control attributes accordingly, for
+     instance __builtin_alloca vs no-throw and -fstack-check.  We will ignore
+     the generic definition from builtins.def.  */
+  build_common_builtin_nodes ();
+
+  /* Now, install the target specific builtins, such as the AltiVec family on
+     ppc, and the common set as exposed by builtins.def.  */
+  targetm.init_builtins ();
+  install_builtin_functions ();
+}
+
+#include "gt-ada-utils.h"
+#include "gtype-ada.h"
diff --git a/gcc/ada/gcc-interface/utils2.c b/gcc/ada/gcc-interface/utils2.c
new file mode 100644
index 00000000000..300fbd37d01
--- /dev/null
+++ b/gcc/ada/gcc-interface/utils2.c
@@ -0,0 +1,2219 @@
+/****************************************************************************
+ *                                                                          *
+ *                         GNAT COMPILER COMPONENTS                         *
+ *                                                                          *
+ *                               U T I L S 2                                *
+ *                                                                          *
+ *                          C Implementation File                           *
+ *                                                                          *
+ *          Copyright (C) 1992-2008, Free Software Foundation, Inc.         *
+ *                                                                          *
+ * GNAT is free software;  you can  redistribute it  and/or modify it under *
+ * terms of the  GNU General Public License as published  by the Free Soft- *
+ * ware  Foundation;  either version 3,  or (at your option) any later ver- *
+ * sion.  GNAT is distributed in the hope that it will be useful, but WITH- *
+ * OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY *
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License *
+ * for  more details.  You should have received a copy of the GNU General   *
+ * Public License along with GCC; see the file COPYING3.  If not see        *
+ * <http://www.gnu.org/licenses/>.                                          *
+ *                                                                          *
+ * GNAT was originally developed  by the GNAT team at  New York University. *
+ * Extensive contributions were provided by Ada Core Technologies Inc.      *
+ *                                                                          *
+ ****************************************************************************/
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
+#include "tree.h"
+#include "rtl.h"
+#include "ggc.h"
+#include "flags.h"
+#include "output.h"
+#include "ada.h"
+#include "types.h"
+#include "atree.h"
+#include "stringt.h"
+#include "namet.h"
+#include "uintp.h"
+#include "fe.h"
+#include "elists.h"
+#include "nlists.h"
+#include "sinfo.h"
+#include "einfo.h"
+#include "ada-tree.h"
+#include "gigi.h"
+
+static tree find_common_type (tree, tree);
+static bool contains_save_expr_p (tree);
+static tree contains_null_expr (tree);
+static tree compare_arrays (tree, tree, tree);
+static tree nonbinary_modular_operation (enum tree_code, tree, tree, tree);
+static tree build_simple_component_ref (tree, tree, tree, bool);
+
+/* Prepare expr to be an argument of a TRUTH_NOT_EXPR or other logical
+   operation.
+
+   This preparation consists of taking the ordinary representation of
+   an expression expr and producing a valid tree boolean expression
+   describing whether expr is nonzero. We could simply always do
+
+      build_binary_op (NE_EXPR, expr, integer_zero_node, 1),
+
+   but we optimize comparisons, &&, ||, and !.
+
+   The resulting type should always be the same as the input type.
+   This function is simpler than the corresponding C version since
+   the only possible operands will be things of Boolean type.  */
+
+tree
+gnat_truthvalue_conversion (tree expr)
+{
+  tree type = TREE_TYPE (expr);
+
+  switch (TREE_CODE (expr))
+    {
+    case EQ_EXPR:  case NE_EXPR: case LE_EXPR: case GE_EXPR:
+    case LT_EXPR:  case GT_EXPR:
+    case TRUTH_ANDIF_EXPR:
+    case TRUTH_ORIF_EXPR:
+    case TRUTH_AND_EXPR:
+    case TRUTH_OR_EXPR:
+    case TRUTH_XOR_EXPR:
+    case ERROR_MARK:
+      return expr;
+
+    case INTEGER_CST:
+      return (integer_zerop (expr)
+	      ? build_int_cst (type, 0)
+	      : build_int_cst (type, 1));
+
+    case REAL_CST:
+      return (real_zerop (expr)
+	      ? fold_convert (type, integer_zero_node)
+	      : fold_convert (type, integer_one_node));
+
+    case COND_EXPR:
+      /* Distribute the conversion into the arms of a COND_EXPR.  */
+      {
+	tree arg1 = gnat_truthvalue_conversion (TREE_OPERAND (expr, 1));
+	tree arg2 = gnat_truthvalue_conversion (TREE_OPERAND (expr, 2));
+	return fold_build3 (COND_EXPR, type, TREE_OPERAND (expr, 0),
+			    arg1, arg2);
+      }
+
+    default:
+      return build_binary_op (NE_EXPR, type, expr,
+			      fold_convert (type, integer_zero_node));
+    }
+}
+
+/* Return the base type of TYPE.  */
+
+tree
+get_base_type (tree type)
+{
+  if (TREE_CODE (type) == RECORD_TYPE
+      && TYPE_JUSTIFIED_MODULAR_P (type))
+    type = TREE_TYPE (TYPE_FIELDS (type));
+
+  while (TREE_TYPE (type)
+	 && (TREE_CODE (type) == INTEGER_TYPE
+	     || TREE_CODE (type) == REAL_TYPE))
+    type = TREE_TYPE (type);
+
+  return type;
+}
+
+/* EXP is a GCC tree representing an address.  See if we can find how
+   strictly the object at that address is aligned.   Return that alignment
+   in bits.  If we don't know anything about the alignment, return 0.  */
+
+unsigned int
+known_alignment (tree exp)
+{
+  unsigned int this_alignment;
+  unsigned int lhs, rhs;
+
+  switch (TREE_CODE (exp))
+    {
+    CASE_CONVERT:
+    case VIEW_CONVERT_EXPR:
+    case NON_LVALUE_EXPR:
+      /* Conversions between pointers and integers don't change the alignment
+	 of the underlying object.  */
+      this_alignment = known_alignment (TREE_OPERAND (exp, 0));
+      break;
+
+    case COMPOUND_EXPR:
+      /* The value of a COMPOUND_EXPR is that of it's second operand.  */
+      this_alignment = known_alignment (TREE_OPERAND (exp, 1));
+      break;
+
+    case PLUS_EXPR:
+    case MINUS_EXPR:
+      /* If two address are added, the alignment of the result is the
+	 minimum of the two alignments.  */
+      lhs = known_alignment (TREE_OPERAND (exp, 0));
+      rhs = known_alignment (TREE_OPERAND (exp, 1));
+      this_alignment = MIN (lhs, rhs);
+      break;
+
+    case POINTER_PLUS_EXPR:
+      lhs = known_alignment (TREE_OPERAND (exp, 0));
+      rhs = known_alignment (TREE_OPERAND (exp, 1));
+      /* If we don't know the alignment of the offset, we assume that
+	 of the base.  */
+      if (rhs == 0)
+	this_alignment = lhs;
+      else
+	this_alignment = MIN (lhs, rhs);
+      break;
+
+    case COND_EXPR:
+      /* If there is a choice between two values, use the smallest one.  */
+      lhs = known_alignment (TREE_OPERAND (exp, 1));
+      rhs = known_alignment (TREE_OPERAND (exp, 2));
+      this_alignment = MIN (lhs, rhs);
+      break;
+
+    case INTEGER_CST:
+      {
+	unsigned HOST_WIDE_INT c = TREE_INT_CST_LOW (exp);
+	/* The first part of this represents the lowest bit in the constant,
+	   but it is originally in bytes, not bits.  */
+	this_alignment = MIN (BITS_PER_UNIT * (c & -c), BIGGEST_ALIGNMENT);
+      }
+      break;
+
+    case MULT_EXPR:
+      /* If we know the alignment of just one side, use it.  Otherwise,
+	 use the product of the alignments.  */
+      lhs = known_alignment (TREE_OPERAND (exp, 0));
+      rhs = known_alignment (TREE_OPERAND (exp, 1));
+
+      if (lhs == 0)
+	this_alignment = rhs;
+      else if (rhs == 0)
+	this_alignment = lhs;
+      else
+	this_alignment = MIN (lhs * rhs, BIGGEST_ALIGNMENT);
+      break;
+
+    case BIT_AND_EXPR:
+      /* A bit-and expression is as aligned as the maximum alignment of the
+	 operands.  We typically get here for a complex lhs and a constant
+	 negative power of two on the rhs to force an explicit alignment, so
+	 don't bother looking at the lhs.  */
+      this_alignment = known_alignment (TREE_OPERAND (exp, 1));
+      break;
+
+    case ADDR_EXPR:
+      this_alignment = expr_align (TREE_OPERAND (exp, 0));
+      break;
+
+    default:
+      /* For other pointer expressions, we assume that the pointed-to object
+	 is at least as aligned as the pointed-to type.  Beware that we can
+	 have a dummy type here (e.g. a Taft Amendment type), for which the
+	 alignment is meaningless and should be ignored.  */
+      if (POINTER_TYPE_P (TREE_TYPE (exp))
+	  && !TYPE_IS_DUMMY_P (TREE_TYPE (TREE_TYPE (exp))))
+	this_alignment = TYPE_ALIGN (TREE_TYPE (TREE_TYPE (exp)));
+      else
+	this_alignment = 0;
+      break;
+    }
+
+  return this_alignment;
+}
+
+/* We have a comparison or assignment operation on two types, T1 and T2, which
+   are either both array types or both record types.  T1 is assumed to be for
+   the left hand side operand, and T2 for the right hand side.  Return the
+   type that both operands should be converted to for the operation, if any.
+   Otherwise return zero.  */
+
+static tree
+find_common_type (tree t1, tree t2)
+{
+  /* ??? As of today, various constructs lead here with types of different
+     sizes even when both constants (e.g. tagged types, packable vs regular
+     component types, padded vs unpadded types, ...).  While some of these
+     would better be handled upstream (types should be made consistent before
+     calling into build_binary_op), some others are really expected and we
+     have to be careful.  */
+
+  /* We must prevent writing more than what the target may hold if this is for
+     an assignment and the case of tagged types is handled in build_binary_op
+     so use the lhs type if it is known to be smaller, or of constant size and
+     the rhs type is not, whatever the modes.  We also force t1 in case of
+     constant size equality to minimize occurrences of view conversions on the
+     lhs of assignments.  */
+  if (TREE_CONSTANT (TYPE_SIZE (t1))
+      && (!TREE_CONSTANT (TYPE_SIZE (t2))
+          || !tree_int_cst_lt (TYPE_SIZE (t2), TYPE_SIZE (t1))))
+    return t1;
+
+  /* Otherwise, if the lhs type is non-BLKmode, use it.  Note that we know
+     that we will not have any alignment problems since, if we did, the
+     non-BLKmode type could not have been used.  */
+  if (TYPE_MODE (t1) != BLKmode)
+    return t1;
+
+  /* If the rhs type is of constant size, use it whatever the modes.  At
+     this point it is known to be smaller, or of constant size and the
+     lhs type is not.  */
+  if (TREE_CONSTANT (TYPE_SIZE (t2)))
+    return t2;
+
+  /* Otherwise, if the rhs type is non-BLKmode, use it.  */
+  if (TYPE_MODE (t2) != BLKmode)
+    return t2;
+
+  /* In this case, both types have variable size and BLKmode.  It's
+     probably best to leave the "type mismatch" because changing it
+     could cause a bad self-referential reference.  */
+  return NULL_TREE;
+}
+
+/* See if EXP contains a SAVE_EXPR in a position where we would
+   normally put it.
+
+   ??? This is a real kludge, but is probably the best approach short
+   of some very general solution.  */
+
+static bool
+contains_save_expr_p (tree exp)
+{
+  switch (TREE_CODE (exp))
+    {
+    case SAVE_EXPR:
+      return true;
+
+    case ADDR_EXPR:  case INDIRECT_REF:
+    case COMPONENT_REF:
+    CASE_CONVERT: case VIEW_CONVERT_EXPR:
+      return contains_save_expr_p (TREE_OPERAND (exp, 0));
+
+    case CONSTRUCTOR:
+      {
+	tree value;
+	unsigned HOST_WIDE_INT ix;
+
+	FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (exp), ix, value)
+	  if (contains_save_expr_p (value))
+	    return true;
+	return false;
+      }
+
+    default:
+      return false;
+    }
+}
+
+/* See if EXP contains a NULL_EXPR in an expression we use for sizes. Return
+   it if so.  This is used to detect types whose sizes involve computations
+   that are known to raise Constraint_Error.  */
+
+static tree
+contains_null_expr (tree exp)
+{
+  tree tem;
+
+  if (TREE_CODE (exp) == NULL_EXPR)
+    return exp;
+
+  switch (TREE_CODE_CLASS (TREE_CODE (exp)))
+    {
+    case tcc_unary:
+      return contains_null_expr (TREE_OPERAND (exp, 0));
+
+    case tcc_comparison:
+    case tcc_binary:
+      tem = contains_null_expr (TREE_OPERAND (exp, 0));
+      if (tem)
+	return tem;
+
+      return contains_null_expr (TREE_OPERAND (exp, 1));
+
+    case tcc_expression:
+      switch (TREE_CODE (exp))
+	{
+	case SAVE_EXPR:
+	  return contains_null_expr (TREE_OPERAND (exp, 0));
+
+	case COND_EXPR:
+	  tem = contains_null_expr (TREE_OPERAND (exp, 0));
+	  if (tem)
+	    return tem;
+
+	  tem = contains_null_expr (TREE_OPERAND (exp, 1));
+	  if (tem)
+	    return tem;
+
+	  return contains_null_expr (TREE_OPERAND (exp, 2));
+
+	default:
+	  return 0;
+	}
+
+    default:
+      return 0;
+    }
+}
+
+/* Return an expression tree representing an equality comparison of
+   A1 and A2, two objects of ARRAY_TYPE.  The returned expression should
+   be of type RESULT_TYPE
+
+   Two arrays are equal in one of two ways: (1) if both have zero length
+   in some dimension (not necessarily the same dimension) or (2) if the
+   lengths in each dimension are equal and the data is equal.  We perform the
+   length tests in as efficient a manner as possible.  */
+
+static tree
+compare_arrays (tree result_type, tree a1, tree a2)
+{
+  tree t1 = TREE_TYPE (a1);
+  tree t2 = TREE_TYPE (a2);
+  tree result = convert (result_type, integer_one_node);
+  tree a1_is_null = convert (result_type, integer_zero_node);
+  tree a2_is_null = convert (result_type, integer_zero_node);
+  bool length_zero_p = false;
+
+  /* Process each dimension separately and compare the lengths.  If any
+     dimension has a size known to be zero, set SIZE_ZERO_P to 1 to
+     suppress the comparison of the data.  */
+  while (TREE_CODE (t1) == ARRAY_TYPE && TREE_CODE (t2) == ARRAY_TYPE)
+    {
+      tree lb1 = TYPE_MIN_VALUE (TYPE_DOMAIN (t1));
+      tree ub1 = TYPE_MAX_VALUE (TYPE_DOMAIN (t1));
+      tree lb2 = TYPE_MIN_VALUE (TYPE_DOMAIN (t2));
+      tree ub2 = TYPE_MAX_VALUE (TYPE_DOMAIN (t2));
+      tree bt = get_base_type (TREE_TYPE (lb1));
+      tree length1 = fold_build2 (MINUS_EXPR, bt, ub1, lb1);
+      tree length2 = fold_build2 (MINUS_EXPR, bt, ub2, lb2);
+      tree nbt;
+      tree tem;
+      tree comparison, this_a1_is_null, this_a2_is_null;
+
+      /* If the length of the first array is a constant, swap our operands
+	 unless the length of the second array is the constant zero.
+	 Note that we have set the `length' values to the length - 1.  */
+      if (TREE_CODE (length1) == INTEGER_CST
+	  && !integer_zerop (fold_build2 (PLUS_EXPR, bt, length2,
+					  convert (bt, integer_one_node))))
+	{
+	  tem = a1, a1 = a2, a2 = tem;
+	  tem = t1, t1 = t2, t2 = tem;
+	  tem = lb1, lb1 = lb2, lb2 = tem;
+	  tem = ub1, ub1 = ub2, ub2 = tem;
+	  tem = length1, length1 = length2, length2 = tem;
+	  tem = a1_is_null, a1_is_null = a2_is_null, a2_is_null = tem;
+	}
+
+      /* If the length of this dimension in the second array is the constant
+	 zero, we can just go inside the original bounds for the first
+	 array and see if last < first.  */
+      if (integer_zerop (fold_build2 (PLUS_EXPR, bt, length2,
+				      convert (bt, integer_one_node))))
+	{
+	  tree ub = TYPE_MAX_VALUE (TYPE_INDEX_TYPE (TYPE_DOMAIN (t1)));
+	  tree lb = TYPE_MIN_VALUE (TYPE_INDEX_TYPE (TYPE_DOMAIN (t1)));
+
+	  comparison = build_binary_op (LT_EXPR, result_type, ub, lb);
+	  comparison = SUBSTITUTE_PLACEHOLDER_IN_EXPR (comparison, a1);
+	  length1 = SUBSTITUTE_PLACEHOLDER_IN_EXPR (length1, a1);
+
+	  length_zero_p = true;
+	  this_a1_is_null = comparison;
+	  this_a2_is_null = convert (result_type, integer_one_node);
+	}
+
+      /* If the length is some other constant value, we know that the
+	 this dimension in the first array cannot be superflat, so we
+	 can just use its length from the actual stored bounds.  */
+      else if (TREE_CODE (length2) == INTEGER_CST)
+	{
+	  ub1 = TYPE_MAX_VALUE (TYPE_INDEX_TYPE (TYPE_DOMAIN (t1)));
+	  lb1 = TYPE_MIN_VALUE (TYPE_INDEX_TYPE (TYPE_DOMAIN (t1)));
+	  ub2 = TYPE_MAX_VALUE (TYPE_INDEX_TYPE (TYPE_DOMAIN (t2)));
+	  lb2 = TYPE_MIN_VALUE (TYPE_INDEX_TYPE (TYPE_DOMAIN (t2)));
+	  nbt = get_base_type (TREE_TYPE (ub1));
+
+	  comparison
+	    = build_binary_op (EQ_EXPR, result_type,
+			       build_binary_op (MINUS_EXPR, nbt, ub1, lb1),
+			       build_binary_op (MINUS_EXPR, nbt, ub2, lb2));
+
+	  /* Note that we know that UB2 and LB2 are constant and hence
+	     cannot contain a PLACEHOLDER_EXPR.  */
+
+	  comparison = SUBSTITUTE_PLACEHOLDER_IN_EXPR (comparison, a1);
+	  length1 = SUBSTITUTE_PLACEHOLDER_IN_EXPR (length1, a1);
+
+	  this_a1_is_null = build_binary_op (LT_EXPR, result_type, ub1, lb1);
+	  this_a2_is_null = convert (result_type, integer_zero_node);
+	}
+
+      /* Otherwise compare the computed lengths.  */
+      else
+	{
+	  length1 = SUBSTITUTE_PLACEHOLDER_IN_EXPR (length1, a1);
+	  length2 = SUBSTITUTE_PLACEHOLDER_IN_EXPR (length2, a2);
+
+	  comparison
+	    = build_binary_op (EQ_EXPR, result_type, length1, length2);
+
+	  this_a1_is_null
+	    = build_binary_op (LT_EXPR, result_type, length1,
+			       convert (bt, integer_zero_node));
+	  this_a2_is_null
+	    = build_binary_op (LT_EXPR, result_type, length2,
+			       convert (bt, integer_zero_node));
+	}
+
+      result = build_binary_op (TRUTH_ANDIF_EXPR, result_type,
+				result, comparison);
+
+      a1_is_null = build_binary_op (TRUTH_ORIF_EXPR, result_type,
+				    this_a1_is_null, a1_is_null);
+      a2_is_null = build_binary_op (TRUTH_ORIF_EXPR, result_type,
+				    this_a2_is_null, a2_is_null);
+
+      t1 = TREE_TYPE (t1);
+      t2 = TREE_TYPE (t2);
+    }
+
+  /* Unless the size of some bound is known to be zero, compare the
+     data in the array.  */
+  if (!length_zero_p)
+    {
+      tree type = find_common_type (TREE_TYPE (a1), TREE_TYPE (a2));
+
+      if (type)
+	a1 = convert (type, a1), a2 = convert (type, a2);
+
+      result = build_binary_op (TRUTH_ANDIF_EXPR, result_type, result,
+				fold_build2 (EQ_EXPR, result_type, a1, a2));
+
+    }
+
+  /* The result is also true if both sizes are zero.  */
+  result = build_binary_op (TRUTH_ORIF_EXPR, result_type,
+			    build_binary_op (TRUTH_ANDIF_EXPR, result_type,
+					     a1_is_null, a2_is_null),
+			    result);
+
+  /* If either operand contains SAVE_EXPRs, they have to be evaluated before
+     starting the comparison above since the place it would be otherwise
+     evaluated would be wrong.  */
+
+  if (contains_save_expr_p (a1))
+    result = build2 (COMPOUND_EXPR, result_type, a1, result);
+
+  if (contains_save_expr_p (a2))
+    result = build2 (COMPOUND_EXPR, result_type, a2, result);
+
+  return result;
+}
+
+/* Compute the result of applying OP_CODE to LHS and RHS, where both are of
+   type TYPE.  We know that TYPE is a modular type with a nonbinary
+   modulus.  */
+
+static tree
+nonbinary_modular_operation (enum tree_code op_code, tree type, tree lhs,
+                             tree rhs)
+{
+  tree modulus = TYPE_MODULUS (type);
+  unsigned int needed_precision = tree_floor_log2 (modulus) + 1;
+  unsigned int precision;
+  bool unsignedp = true;
+  tree op_type = type;
+  tree result;
+
+  /* If this is an addition of a constant, convert it to a subtraction
+     of a constant since we can do that faster.  */
+  if (op_code == PLUS_EXPR && TREE_CODE (rhs) == INTEGER_CST)
+    {
+      rhs = fold_build2 (MINUS_EXPR, type, modulus, rhs);
+      op_code = MINUS_EXPR;
+    }
+
+  /* For the logical operations, we only need PRECISION bits.  For
+     addition and subtraction, we need one more and for multiplication we
+     need twice as many.  But we never want to make a size smaller than
+     our size. */
+  if (op_code == PLUS_EXPR || op_code == MINUS_EXPR)
+    needed_precision += 1;
+  else if (op_code == MULT_EXPR)
+    needed_precision *= 2;
+
+  precision = MAX (needed_precision, TYPE_PRECISION (op_type));
+
+  /* Unsigned will do for everything but subtraction.  */
+  if (op_code == MINUS_EXPR)
+    unsignedp = false;
+
+  /* If our type is the wrong signedness or isn't wide enough, make a new
+     type and convert both our operands to it.  */
+  if (TYPE_PRECISION (op_type) < precision
+      || TYPE_UNSIGNED (op_type) != unsignedp)
+    {
+      /* Copy the node so we ensure it can be modified to make it modular.  */
+      op_type = copy_node (gnat_type_for_size (precision, unsignedp));
+      modulus = convert (op_type, modulus);
+      SET_TYPE_MODULUS (op_type, modulus);
+      TYPE_MODULAR_P (op_type) = 1;
+      lhs = convert (op_type, lhs);
+      rhs = convert (op_type, rhs);
+    }
+
+  /* Do the operation, then we'll fix it up.  */
+  result = fold_build2 (op_code, op_type, lhs, rhs);
+
+  /* For multiplication, we have no choice but to do a full modulus
+     operation.  However, we want to do this in the narrowest
+     possible size.  */
+  if (op_code == MULT_EXPR)
+    {
+      tree div_type = copy_node (gnat_type_for_size (needed_precision, 1));
+      modulus = convert (div_type, modulus);
+      SET_TYPE_MODULUS (div_type, modulus);
+      TYPE_MODULAR_P (div_type) = 1;
+      result = convert (op_type,
+			fold_build2 (TRUNC_MOD_EXPR, div_type,
+				     convert (div_type, result), modulus));
+    }
+
+  /* For subtraction, add the modulus back if we are negative.  */
+  else if (op_code == MINUS_EXPR)
+    {
+      result = save_expr (result);
+      result = fold_build3 (COND_EXPR, op_type,
+			    fold_build2 (LT_EXPR, integer_type_node, result,
+					 convert (op_type, integer_zero_node)),
+			    fold_build2 (PLUS_EXPR, op_type, result, modulus),
+			    result);
+    }
+
+  /* For the other operations, subtract the modulus if we are >= it.  */
+  else
+    {
+      result = save_expr (result);
+      result = fold_build3 (COND_EXPR, op_type,
+			    fold_build2 (GE_EXPR, integer_type_node,
+					 result, modulus),
+			    fold_build2 (MINUS_EXPR, op_type,
+					 result, modulus),
+			    result);
+    }
+
+  return convert (type, result);
+}
+
+/* Make a binary operation of kind OP_CODE.  RESULT_TYPE is the type
+   desired for the result.  Usually the operation is to be performed
+   in that type.  For MODIFY_EXPR and ARRAY_REF, RESULT_TYPE may be 0
+   in which case the type to be used will be derived from the operands.
+
+   This function is very much unlike the ones for C and C++ since we
+   have already done any type conversion and matching required.  All we
+   have to do here is validate the work done by SEM and handle subtypes.  */
+
+tree
+build_binary_op (enum tree_code op_code, tree result_type,
+                 tree left_operand, tree right_operand)
+{
+  tree left_type  = TREE_TYPE (left_operand);
+  tree right_type = TREE_TYPE (right_operand);
+  tree left_base_type = get_base_type (left_type);
+  tree right_base_type = get_base_type (right_type);
+  tree operation_type = result_type;
+  tree best_type = NULL_TREE;
+  tree modulus, result;
+  bool has_side_effects = false;
+
+  if (operation_type
+      && TREE_CODE (operation_type) == RECORD_TYPE
+      && TYPE_JUSTIFIED_MODULAR_P (operation_type))
+    operation_type = TREE_TYPE (TYPE_FIELDS (operation_type));
+
+  if (operation_type
+      && !AGGREGATE_TYPE_P (operation_type)
+      && TYPE_EXTRA_SUBTYPE_P (operation_type))
+    operation_type = get_base_type (operation_type);
+
+  modulus = (operation_type
+	     && TREE_CODE (operation_type) == INTEGER_TYPE
+	     && TYPE_MODULAR_P (operation_type)
+	     ? TYPE_MODULUS (operation_type) : NULL_TREE);
+
+  switch (op_code)
+    {
+    case MODIFY_EXPR:
+      /* If there were integral or pointer conversions on the LHS, remove
+	 them; we'll be putting them back below if needed.  Likewise for
+	 conversions between array and record types, except for justified
+	 modular types.  But don't do this if the right operand is not
+	 BLKmode (for packed arrays) unless we are not changing the mode.  */
+      while ((CONVERT_EXPR_P (left_operand)
+	      || TREE_CODE (left_operand) == VIEW_CONVERT_EXPR)
+	     && (((INTEGRAL_TYPE_P (left_type)
+		   || POINTER_TYPE_P (left_type))
+		  && (INTEGRAL_TYPE_P (TREE_TYPE
+				       (TREE_OPERAND (left_operand, 0)))
+		      || POINTER_TYPE_P (TREE_TYPE
+					 (TREE_OPERAND (left_operand, 0)))))
+		 || (((TREE_CODE (left_type) == RECORD_TYPE
+		       && !TYPE_JUSTIFIED_MODULAR_P (left_type))
+		      || TREE_CODE (left_type) == ARRAY_TYPE)
+		     && ((TREE_CODE (TREE_TYPE
+				     (TREE_OPERAND (left_operand, 0)))
+			  == RECORD_TYPE)
+			 || (TREE_CODE (TREE_TYPE
+					(TREE_OPERAND (left_operand, 0)))
+			     == ARRAY_TYPE))
+		     && (TYPE_MODE (right_type) == BLKmode
+			 || (TYPE_MODE (left_type)
+			     == TYPE_MODE (TREE_TYPE
+					   (TREE_OPERAND
+					    (left_operand, 0))))))))
+	{
+	  left_operand = TREE_OPERAND (left_operand, 0);
+	  left_type = TREE_TYPE (left_operand);
+	}
+
+      /* If a class-wide type may be involved, force use of the RHS type.  */
+      if ((TREE_CODE (right_type) == RECORD_TYPE
+	   || TREE_CODE (right_type) == UNION_TYPE)
+	  && TYPE_ALIGN_OK (right_type))
+	operation_type = right_type;
+
+      /* If we are copying between padded objects with compatible types, use
+	 the padded view of the objects, this is very likely more efficient.
+	 Likewise for a padded that is assigned a constructor, in order to
+	 avoid putting a VIEW_CONVERT_EXPR on the LHS.  But don't do this if
+	 we wouldn't have actually copied anything.  */
+      else if (TREE_CODE (left_type) == RECORD_TYPE
+	       && TYPE_IS_PADDING_P (left_type)
+	       && TREE_CONSTANT (TYPE_SIZE (left_type))
+	       && ((TREE_CODE (right_operand) == COMPONENT_REF
+		    && TREE_CODE (TREE_TYPE (TREE_OPERAND (right_operand, 0)))
+		       == RECORD_TYPE
+		    && TYPE_IS_PADDING_P
+		       (TREE_TYPE (TREE_OPERAND (right_operand, 0)))
+		    && gnat_types_compatible_p
+			(left_type,
+			 TREE_TYPE (TREE_OPERAND (right_operand, 0))))
+		   || TREE_CODE (right_operand) == CONSTRUCTOR)
+	       && !integer_zerop (TYPE_SIZE (right_type)))
+	operation_type = left_type;
+
+      /* Find the best type to use for copying between aggregate types.  */
+      else if (((TREE_CODE (left_type) == ARRAY_TYPE
+		 && TREE_CODE (right_type) == ARRAY_TYPE)
+		|| (TREE_CODE (left_type) == RECORD_TYPE
+		    && TREE_CODE (right_type) == RECORD_TYPE))
+	       && (best_type = find_common_type (left_type, right_type)))
+	operation_type = best_type;
+
+      /* Otherwise use the LHS type.  */
+      else if (!operation_type)
+	operation_type = left_type;
+
+      /* Ensure everything on the LHS is valid.  If we have a field reference,
+	 strip anything that get_inner_reference can handle.  Then remove any
+	 conversions between types having the same code and mode.  And mark
+	 VIEW_CONVERT_EXPRs with TREE_ADDRESSABLE.  When done, we must have
+	 either an INDIRECT_REF, a NULL_EXPR or a DECL node.  */
+      result = left_operand;
+      while (true)
+	{
+	  tree restype = TREE_TYPE (result);
+
+	  if (TREE_CODE (result) == COMPONENT_REF
+	      || TREE_CODE (result) == ARRAY_REF
+	      || TREE_CODE (result) == ARRAY_RANGE_REF)
+	    while (handled_component_p (result))
+	      result = TREE_OPERAND (result, 0);
+	  else if (TREE_CODE (result) == REALPART_EXPR
+		   || TREE_CODE (result) == IMAGPART_EXPR
+		   || (CONVERT_EXPR_P (result)
+		       && (((TREE_CODE (restype)
+			     == TREE_CODE (TREE_TYPE
+					   (TREE_OPERAND (result, 0))))
+			     && (TYPE_MODE (TREE_TYPE
+					    (TREE_OPERAND (result, 0)))
+				 == TYPE_MODE (restype)))
+			   || TYPE_ALIGN_OK (restype))))
+	    result = TREE_OPERAND (result, 0);
+	  else if (TREE_CODE (result) == VIEW_CONVERT_EXPR)
+	    {
+	      TREE_ADDRESSABLE (result) = 1;
+	      result = TREE_OPERAND (result, 0);
+	    }
+	  else
+	    break;
+	}
+
+      gcc_assert (TREE_CODE (result) == INDIRECT_REF
+		  || TREE_CODE (result) == NULL_EXPR
+		  || DECL_P (result));
+
+      /* Convert the right operand to the operation type unless it is
+	 either already of the correct type or if the type involves a
+	 placeholder, since the RHS may not have the same record type.  */
+      if (operation_type != right_type
+	  && !CONTAINS_PLACEHOLDER_P (TYPE_SIZE (operation_type)))
+	{
+	  right_operand = convert (operation_type, right_operand);
+	  right_type = operation_type;
+	}
+
+      /* If the left operand is not of the same type as the operation
+	 type, wrap it up in a VIEW_CONVERT_EXPR.  */
+      if (left_type != operation_type)
+	left_operand = unchecked_convert (operation_type, left_operand, false);
+
+      has_side_effects = true;
+      modulus = NULL_TREE;
+      break;
+
+    case ARRAY_REF:
+      if (!operation_type)
+	operation_type = TREE_TYPE (left_type);
+
+      /* ... fall through ... */
+
+    case ARRAY_RANGE_REF:
+      /* First look through conversion between type variants.  Note that
+	 this changes neither the operation type nor the type domain.  */
+      if (TREE_CODE (left_operand) == VIEW_CONVERT_EXPR
+	  && TYPE_MAIN_VARIANT (TREE_TYPE (TREE_OPERAND (left_operand, 0)))
+	     == TYPE_MAIN_VARIANT (left_type))
+	{
+	  left_operand = TREE_OPERAND (left_operand, 0);
+	  left_type = TREE_TYPE (left_operand);
+	}
+
+      /* Then convert the right operand to its base type.  This will
+	 prevent unneeded signedness conversions when sizetype is wider than
+	 integer.  */
+      right_operand = convert (right_base_type, right_operand);
+      right_operand = convert (TYPE_DOMAIN (left_type), right_operand);
+
+      if (!TREE_CONSTANT (right_operand)
+	  || !TREE_CONSTANT (TYPE_MIN_VALUE (right_type)))
+	gnat_mark_addressable (left_operand);
+
+      modulus = NULL_TREE;
+      break;
+
+    case GE_EXPR:
+    case LE_EXPR:
+    case GT_EXPR:
+    case LT_EXPR:
+      gcc_assert (!POINTER_TYPE_P (left_type));
+
+      /* ... fall through ... */
+
+    case EQ_EXPR:
+    case NE_EXPR:
+      /* If either operand is a NULL_EXPR, just return a new one.  */
+      if (TREE_CODE (left_operand) == NULL_EXPR)
+	return build2 (op_code, result_type,
+		       build1 (NULL_EXPR, integer_type_node,
+			       TREE_OPERAND (left_operand, 0)),
+		       integer_zero_node);
+
+      else if (TREE_CODE (right_operand) == NULL_EXPR)
+	return build2 (op_code, result_type,
+		       build1 (NULL_EXPR, integer_type_node,
+			       TREE_OPERAND (right_operand, 0)),
+		       integer_zero_node);
+
+      /* If either object is a justified modular types, get the
+	 fields from within.  */
+      if (TREE_CODE (left_type) == RECORD_TYPE
+	  && TYPE_JUSTIFIED_MODULAR_P (left_type))
+	{
+	  left_operand = convert (TREE_TYPE (TYPE_FIELDS (left_type)),
+				  left_operand);
+	  left_type = TREE_TYPE (left_operand);
+	  left_base_type = get_base_type (left_type);
+	}
+
+      if (TREE_CODE (right_type) == RECORD_TYPE
+	  && TYPE_JUSTIFIED_MODULAR_P (right_type))
+	{
+	  right_operand = convert (TREE_TYPE (TYPE_FIELDS (right_type)),
+				  right_operand);
+	  right_type = TREE_TYPE (right_operand);
+	  right_base_type = get_base_type (right_type);
+	}
+
+      /* If both objects are arrays, compare them specially.  */
+      if ((TREE_CODE (left_type) == ARRAY_TYPE
+	   || (TREE_CODE (left_type) == INTEGER_TYPE
+	       && TYPE_HAS_ACTUAL_BOUNDS_P (left_type)))
+	  && (TREE_CODE (right_type) == ARRAY_TYPE
+	      || (TREE_CODE (right_type) == INTEGER_TYPE
+		  && TYPE_HAS_ACTUAL_BOUNDS_P (right_type))))
+	{
+	  result = compare_arrays (result_type, left_operand, right_operand);
+
+	  if (op_code == NE_EXPR)
+	    result = invert_truthvalue (result);
+	  else
+	    gcc_assert (op_code == EQ_EXPR);
+
+	  return result;
+	}
+
+      /* Otherwise, the base types must be the same unless the objects are
+	 fat pointers or records.  If we have records, use the best type and
+	 convert both operands to that type.  */
+      if (left_base_type != right_base_type)
+	{
+	  if (TYPE_FAT_POINTER_P (left_base_type)
+	      && TYPE_FAT_POINTER_P (right_base_type)
+	      && TYPE_MAIN_VARIANT (left_base_type)
+		 == TYPE_MAIN_VARIANT (right_base_type))
+	    best_type = left_base_type;
+	  else if (TREE_CODE (left_base_type) == RECORD_TYPE
+		   && TREE_CODE (right_base_type) == RECORD_TYPE)
+	    {
+	      /* The only way these are permitted to be the same is if both
+		 types have the same name.  In that case, one of them must
+		 not be self-referential.  Use that one as the best type.
+		 Even better is if one is of fixed size.  */
+	      gcc_assert (TYPE_NAME (left_base_type)
+			  && (TYPE_NAME (left_base_type)
+			      == TYPE_NAME (right_base_type)));
+
+	      if (TREE_CONSTANT (TYPE_SIZE (left_base_type)))
+		best_type = left_base_type;
+	      else if (TREE_CONSTANT (TYPE_SIZE (right_base_type)))
+		best_type = right_base_type;
+	      else if (!CONTAINS_PLACEHOLDER_P (TYPE_SIZE (left_base_type)))
+		best_type = left_base_type;
+	      else if (!CONTAINS_PLACEHOLDER_P (TYPE_SIZE (right_base_type)))
+		best_type = right_base_type;
+	      else
+		gcc_unreachable ();
+	    }
+	  else
+	    gcc_unreachable ();
+
+	  left_operand = convert (best_type, left_operand);
+	  right_operand = convert (best_type, right_operand);
+	}
+
+      /* If we are comparing a fat pointer against zero, we need to
+	 just compare the data pointer.  */
+      else if (TYPE_FAT_POINTER_P (left_base_type)
+	       && TREE_CODE (right_operand) == CONSTRUCTOR
+	       && integer_zerop (VEC_index (constructor_elt,
+					    CONSTRUCTOR_ELTS (right_operand),
+					    0)
+				 ->value))
+	{
+	  right_operand = build_component_ref (left_operand, NULL_TREE,
+					       TYPE_FIELDS (left_base_type),
+					       false);
+	  left_operand = convert (TREE_TYPE (right_operand),
+				  integer_zero_node);
+	}
+      else
+	{
+	  left_operand = convert (left_base_type, left_operand);
+	  right_operand = convert (right_base_type, right_operand);
+	}
+
+      modulus = NULL_TREE;
+      break;
+
+    case PREINCREMENT_EXPR:
+    case PREDECREMENT_EXPR:
+    case POSTINCREMENT_EXPR:
+    case POSTDECREMENT_EXPR:
+      /* In these, the result type and the left operand type should be the
+	 same.  Do the operation in the base type of those and convert the
+	 right operand (which is an integer) to that type.
+
+	 Note that these operations are only used in loop control where
+	 we guarantee that no overflow can occur.  So nothing special need
+	 be done for modular types.  */
+
+      gcc_assert (left_type == result_type);
+      operation_type = get_base_type (result_type);
+      left_operand = convert (operation_type, left_operand);
+      right_operand = convert (operation_type, right_operand);
+      has_side_effects = true;
+      modulus = NULL_TREE;
+      break;
+
+    case LSHIFT_EXPR:
+    case RSHIFT_EXPR:
+    case LROTATE_EXPR:
+    case RROTATE_EXPR:
+       /* The RHS of a shift can be any type.  Also, ignore any modulus
+	 (we used to abort, but this is needed for unchecked conversion
+	 to modular types).  Otherwise, processing is the same as normal.  */
+      gcc_assert (operation_type == left_base_type);
+      modulus = NULL_TREE;
+      left_operand = convert (operation_type, left_operand);
+      break;
+
+    case TRUTH_ANDIF_EXPR:
+    case TRUTH_ORIF_EXPR:
+    case TRUTH_AND_EXPR:
+    case TRUTH_OR_EXPR:
+    case TRUTH_XOR_EXPR:
+      left_operand = gnat_truthvalue_conversion (left_operand);
+      right_operand = gnat_truthvalue_conversion (right_operand);
+      goto common;
+
+    case BIT_AND_EXPR:
+    case BIT_IOR_EXPR:
+    case BIT_XOR_EXPR:
+      /* For binary modulus, if the inputs are in range, so are the
+	 outputs.  */
+      if (modulus && integer_pow2p (modulus))
+	modulus = NULL_TREE;
+
+      goto common;
+
+    case COMPLEX_EXPR:
+      gcc_assert (TREE_TYPE (result_type) == left_base_type
+		  && TREE_TYPE (result_type) == right_base_type);
+      left_operand = convert (left_base_type, left_operand);
+      right_operand = convert (right_base_type, right_operand);
+      break;
+
+    case TRUNC_DIV_EXPR:   case TRUNC_MOD_EXPR:
+    case CEIL_DIV_EXPR:    case CEIL_MOD_EXPR:
+    case FLOOR_DIV_EXPR:   case FLOOR_MOD_EXPR:
+    case ROUND_DIV_EXPR:   case ROUND_MOD_EXPR:
+      /* These always produce results lower than either operand.  */
+      modulus = NULL_TREE;
+      goto common;
+
+    case POINTER_PLUS_EXPR:
+      gcc_assert (operation_type == left_base_type
+		  && sizetype == right_base_type);
+      left_operand = convert (operation_type, left_operand);
+      right_operand = convert (sizetype, right_operand);
+      break;
+
+    default:
+    common:
+      /* The result type should be the same as the base types of the
+	 both operands (and they should be the same).  Convert
+	 everything to the result type.  */
+
+      gcc_assert (operation_type == left_base_type
+		  && left_base_type == right_base_type);
+      left_operand = convert (operation_type, left_operand);
+      right_operand = convert (operation_type, right_operand);
+    }
+
+  if (modulus && !integer_pow2p (modulus))
+    {
+      result = nonbinary_modular_operation (op_code, operation_type,
+					    left_operand, right_operand);
+      modulus = NULL_TREE;
+    }
+  /* If either operand is a NULL_EXPR, just return a new one.  */
+  else if (TREE_CODE (left_operand) == NULL_EXPR)
+    return build1 (NULL_EXPR, operation_type, TREE_OPERAND (left_operand, 0));
+  else if (TREE_CODE (right_operand) == NULL_EXPR)
+    return build1 (NULL_EXPR, operation_type, TREE_OPERAND (right_operand, 0));
+  else if (op_code == ARRAY_REF || op_code == ARRAY_RANGE_REF)
+    result = fold (build4 (op_code, operation_type, left_operand,
+			   right_operand, NULL_TREE, NULL_TREE));
+  else
+    result
+      = fold_build2 (op_code, operation_type, left_operand, right_operand);
+
+  TREE_SIDE_EFFECTS (result) |= has_side_effects;
+  TREE_CONSTANT (result)
+    |= (TREE_CONSTANT (left_operand) & TREE_CONSTANT (right_operand)
+	&& op_code != ARRAY_REF && op_code != ARRAY_RANGE_REF);
+
+  if ((op_code == ARRAY_REF || op_code == ARRAY_RANGE_REF)
+      && TYPE_VOLATILE (operation_type))
+    TREE_THIS_VOLATILE (result) = 1;
+
+  /* If we are working with modular types, perform the MOD operation
+     if something above hasn't eliminated the need for it.  */
+  if (modulus)
+    result = fold_build2 (FLOOR_MOD_EXPR, operation_type, result,
+			  convert (operation_type, modulus));
+
+  if (result_type && result_type != operation_type)
+    result = convert (result_type, result);
+
+  return result;
+}
+
+/* Similar, but for unary operations.  */
+
+tree
+build_unary_op (enum tree_code op_code, tree result_type, tree operand)
+{
+  tree type = TREE_TYPE (operand);
+  tree base_type = get_base_type (type);
+  tree operation_type = result_type;
+  tree result;
+  bool side_effects = false;
+
+  if (operation_type
+      && TREE_CODE (operation_type) == RECORD_TYPE
+      && TYPE_JUSTIFIED_MODULAR_P (operation_type))
+    operation_type = TREE_TYPE (TYPE_FIELDS (operation_type));
+
+  if (operation_type
+      && !AGGREGATE_TYPE_P (operation_type)
+      && TYPE_EXTRA_SUBTYPE_P (operation_type))
+    operation_type = get_base_type (operation_type);
+
+  switch (op_code)
+    {
+    case REALPART_EXPR:
+    case IMAGPART_EXPR:
+      if (!operation_type)
+	result_type = operation_type = TREE_TYPE (type);
+      else
+	gcc_assert (result_type == TREE_TYPE (type));
+
+      result = fold_build1 (op_code, operation_type, operand);
+      break;
+
+    case TRUTH_NOT_EXPR:
+      gcc_assert (result_type == base_type);
+      result = invert_truthvalue (gnat_truthvalue_conversion (operand));
+      break;
+
+    case ATTR_ADDR_EXPR:
+    case ADDR_EXPR:
+      switch (TREE_CODE (operand))
+	{
+	case INDIRECT_REF:
+	case UNCONSTRAINED_ARRAY_REF:
+	  result = TREE_OPERAND (operand, 0);
+
+	  /* Make sure the type here is a pointer, not a reference.
+	     GCC wants pointer types for function addresses.  */
+	  if (!result_type)
+	    result_type = build_pointer_type (type);
+
+	  /* If the underlying object can alias everything, propagate the
+	     property since we are effectively retrieving the object.  */
+	  if (POINTER_TYPE_P (TREE_TYPE (result))
+	      && TYPE_REF_CAN_ALIAS_ALL (TREE_TYPE (result)))
+	    {
+	      if (TREE_CODE (result_type) == POINTER_TYPE
+		  && !TYPE_REF_CAN_ALIAS_ALL (result_type))
+		result_type
+		  = build_pointer_type_for_mode (TREE_TYPE (result_type),
+						 TYPE_MODE (result_type),
+						 true);
+	      else if (TREE_CODE (result_type) == REFERENCE_TYPE
+		       && !TYPE_REF_CAN_ALIAS_ALL (result_type))
+	        result_type
+		  = build_reference_type_for_mode (TREE_TYPE (result_type),
+						   TYPE_MODE (result_type),
+						   true);
+	    }
+	  break;
+
+	case NULL_EXPR:
+	  result = operand;
+	  TREE_TYPE (result) = type = build_pointer_type (type);
+	  break;
+
+	case ARRAY_REF:
+	case ARRAY_RANGE_REF:
+	case COMPONENT_REF:
+	case BIT_FIELD_REF:
+	    /* If this is for 'Address, find the address of the prefix and
+	       add the offset to the field.  Otherwise, do this the normal
+	       way.  */
+	  if (op_code == ATTR_ADDR_EXPR)
+	    {
+	      HOST_WIDE_INT bitsize;
+	      HOST_WIDE_INT bitpos;
+	      tree offset, inner;
+	      enum machine_mode mode;
+	      int unsignedp, volatilep;
+
+	      inner = get_inner_reference (operand, &bitsize, &bitpos, &offset,
+					   &mode, &unsignedp, &volatilep,
+					   false);
+
+	      /* If INNER is a padding type whose field has a self-referential
+		 size, convert to that inner type.  We know the offset is zero
+		 and we need to have that type visible.  */
+	      if (TREE_CODE (TREE_TYPE (inner)) == RECORD_TYPE
+		  && TYPE_IS_PADDING_P (TREE_TYPE (inner))
+		  && (CONTAINS_PLACEHOLDER_P
+		      (TYPE_SIZE (TREE_TYPE (TYPE_FIELDS
+					     (TREE_TYPE (inner)))))))
+		inner = convert (TREE_TYPE (TYPE_FIELDS (TREE_TYPE (inner))),
+				 inner);
+
+	      /* Compute the offset as a byte offset from INNER.  */
+	      if (!offset)
+		offset = size_zero_node;
+
+	      if (bitpos % BITS_PER_UNIT != 0)
+		post_error
+		  ("taking address of object not aligned on storage unit?",
+		   error_gnat_node);
+
+	      offset = size_binop (PLUS_EXPR, offset,
+				   size_int (bitpos / BITS_PER_UNIT));
+
+	      /* Take the address of INNER, convert the offset to void *, and
+		 add then.  It will later be converted to the desired result
+		 type, if any.  */
+	      inner = build_unary_op (ADDR_EXPR, NULL_TREE, inner);
+	      inner = convert (ptr_void_type_node, inner);
+	      result = build_binary_op (POINTER_PLUS_EXPR, ptr_void_type_node,
+					inner, offset);
+	      result = convert (build_pointer_type (TREE_TYPE (operand)),
+				result);
+	      break;
+	    }
+	  goto common;
+
+	case CONSTRUCTOR:
+	  /* If this is just a constructor for a padded record, we can
+	     just take the address of the single field and convert it to
+	     a pointer to our type.  */
+	  if (TREE_CODE (type) == RECORD_TYPE && TYPE_IS_PADDING_P (type))
+	    {
+	      result = (VEC_index (constructor_elt,
+				   CONSTRUCTOR_ELTS (operand),
+				   0)
+			->value);
+
+	      result = convert (build_pointer_type (TREE_TYPE (operand)),
+				build_unary_op (ADDR_EXPR, NULL_TREE, result));
+	      break;
+	    }
+
+	  goto common;
+
+	case NOP_EXPR:
+	  if (AGGREGATE_TYPE_P (type)
+	      && AGGREGATE_TYPE_P (TREE_TYPE (TREE_OPERAND (operand, 0))))
+	    return build_unary_op (ADDR_EXPR, result_type,
+				   TREE_OPERAND (operand, 0));
+
+	  /* ... fallthru ... */
+
+	case VIEW_CONVERT_EXPR:
+	  /* If this just a variant conversion or if the conversion doesn't
+	     change the mode, get the result type from this type and go down.
+	     This is needed for conversions of CONST_DECLs, to eventually get
+	     to the address of their CORRESPONDING_VARs.  */
+	  if ((TYPE_MAIN_VARIANT (type)
+	       == TYPE_MAIN_VARIANT (TREE_TYPE (TREE_OPERAND (operand, 0))))
+	      || (TYPE_MODE (type) != BLKmode
+		  && (TYPE_MODE (type)
+		      == TYPE_MODE (TREE_TYPE (TREE_OPERAND (operand, 0))))))
+	    return build_unary_op (ADDR_EXPR,
+				   (result_type ? result_type
+				    : build_pointer_type (type)),
+				   TREE_OPERAND (operand, 0));
+	  goto common;
+
+	case CONST_DECL:
+	  operand = DECL_CONST_CORRESPONDING_VAR (operand);
+
+	  /* ... fall through ... */
+
+	default:
+	common:
+
+	  /* If we are taking the address of a padded record whose field is
+	     contains a template, take the address of the template.  */
+	  if (TREE_CODE (type) == RECORD_TYPE
+	      && TYPE_IS_PADDING_P (type)
+	      && TREE_CODE (TREE_TYPE (TYPE_FIELDS (type))) == RECORD_TYPE
+	      && TYPE_CONTAINS_TEMPLATE_P (TREE_TYPE (TYPE_FIELDS (type))))
+	    {
+	      type = TREE_TYPE (TYPE_FIELDS (type));
+	      operand = convert (type, operand);
+	    }
+
+	  if (type != error_mark_node)
+	    operation_type = build_pointer_type (type);
+
+	  gnat_mark_addressable (operand);
+	  result = fold_build1 (ADDR_EXPR, operation_type, operand);
+	}
+
+      TREE_CONSTANT (result) = staticp (operand) || TREE_CONSTANT (operand);
+      break;
+
+    case INDIRECT_REF:
+      /* If we want to refer to an entire unconstrained array,
+	 make up an expression to do so.  This will never survive to
+	 the backend.  If TYPE is a thin pointer, first convert the
+	 operand to a fat pointer.  */
+      if (TYPE_THIN_POINTER_P (type)
+	  && TYPE_UNCONSTRAINED_ARRAY (TREE_TYPE (type)))
+	{
+	  operand
+	    = convert (TREE_TYPE (TYPE_UNCONSTRAINED_ARRAY (TREE_TYPE (type))),
+		       operand);
+	  type = TREE_TYPE (operand);
+	}
+
+      if (TYPE_FAT_POINTER_P (type))
+	{
+	  result = build1 (UNCONSTRAINED_ARRAY_REF,
+			   TYPE_UNCONSTRAINED_ARRAY (type), operand);
+	  TREE_READONLY (result) = TREE_STATIC (result)
+	    = TYPE_READONLY (TYPE_UNCONSTRAINED_ARRAY (type));
+	}
+      else if (TREE_CODE (operand) == ADDR_EXPR)
+	result = TREE_OPERAND (operand, 0);
+
+      else
+	{
+	  result = fold_build1 (op_code, TREE_TYPE (type), operand);
+	  TREE_READONLY (result) = TYPE_READONLY (TREE_TYPE (type));
+	}
+
+      side_effects
+	=  (!TYPE_FAT_POINTER_P (type) && TYPE_VOLATILE (TREE_TYPE (type)));
+      break;
+
+    case NEGATE_EXPR:
+    case BIT_NOT_EXPR:
+      {
+	tree modulus = ((operation_type
+			 && TREE_CODE (operation_type) == INTEGER_TYPE
+			 && TYPE_MODULAR_P (operation_type))
+			? TYPE_MODULUS (operation_type) : NULL_TREE);
+	int mod_pow2 = modulus && integer_pow2p (modulus);
+
+	/* If this is a modular type, there are various possibilities
+	   depending on the operation and whether the modulus is a
+	   power of two or not.  */
+
+	if (modulus)
+	  {
+	    gcc_assert (operation_type == base_type);
+	    operand = convert (operation_type, operand);
+
+	    /* The fastest in the negate case for binary modulus is
+	       the straightforward code; the TRUNC_MOD_EXPR below
+	       is an AND operation.  */
+	    if (op_code == NEGATE_EXPR && mod_pow2)
+	      result = fold_build2 (TRUNC_MOD_EXPR, operation_type,
+				    fold_build1 (NEGATE_EXPR, operation_type,
+						 operand),
+				    modulus);
+
+	    /* For nonbinary negate case, return zero for zero operand,
+	       else return the modulus minus the operand.  If the modulus
+	       is a power of two minus one, we can do the subtraction
+	       as an XOR since it is equivalent and faster on most machines. */
+	    else if (op_code == NEGATE_EXPR && !mod_pow2)
+	      {
+		if (integer_pow2p (fold_build2 (PLUS_EXPR, operation_type,
+						modulus,
+						convert (operation_type,
+							 integer_one_node))))
+		  result = fold_build2 (BIT_XOR_EXPR, operation_type,
+					operand, modulus);
+		else
+		  result = fold_build2 (MINUS_EXPR, operation_type,
+					modulus, operand);
+
+		result = fold_build3 (COND_EXPR, operation_type,
+				      fold_build2 (NE_EXPR,
+						   integer_type_node,
+						   operand,
+						   convert
+						     (operation_type,
+						      integer_zero_node)),
+				      result, operand);
+	      }
+	    else
+	      {
+		/* For the NOT cases, we need a constant equal to
+		   the modulus minus one.  For a binary modulus, we
+		   XOR against the constant and subtract the operand from
+		   that constant for nonbinary modulus.  */
+
+		tree cnst = fold_build2 (MINUS_EXPR, operation_type, modulus,
+					 convert (operation_type,
+						  integer_one_node));
+
+		if (mod_pow2)
+		  result = fold_build2 (BIT_XOR_EXPR, operation_type,
+					operand, cnst);
+		else
+		  result = fold_build2 (MINUS_EXPR, operation_type,
+					cnst, operand);
+	      }
+
+	    break;
+	  }
+      }
+
+      /* ... fall through ... */
+
+    default:
+      gcc_assert (operation_type == base_type);
+      result = fold_build1 (op_code, operation_type,
+			    convert (operation_type, operand));
+    }
+
+  if (side_effects)
+    {
+      TREE_SIDE_EFFECTS (result) = 1;
+      if (TREE_CODE (result) == INDIRECT_REF)
+	TREE_THIS_VOLATILE (result) = TYPE_VOLATILE (TREE_TYPE (result));
+    }
+
+  if (result_type && TREE_TYPE (result) != result_type)
+    result = convert (result_type, result);
+
+  return result;
+}
+
+/* Similar, but for COND_EXPR.  */
+
+tree
+build_cond_expr (tree result_type, tree condition_operand,
+                 tree true_operand, tree false_operand)
+{
+  tree result;
+  bool addr_p = false;
+
+  /* The front-end verifies that result, true and false operands have same base
+     type.  Convert everything to the result type.  */
+
+  true_operand  = convert (result_type, true_operand);
+  false_operand = convert (result_type, false_operand);
+
+  /* If the result type is unconstrained, take the address of
+     the operands and then dereference our result.  */
+  if (TREE_CODE (result_type) == UNCONSTRAINED_ARRAY_TYPE
+      || CONTAINS_PLACEHOLDER_P (TYPE_SIZE (result_type)))
+    {
+      addr_p = true;
+      result_type = build_pointer_type (result_type);
+      true_operand = build_unary_op (ADDR_EXPR, result_type, true_operand);
+      false_operand = build_unary_op (ADDR_EXPR, result_type, false_operand);
+    }
+
+  result = fold_build3 (COND_EXPR, result_type, condition_operand,
+			true_operand, false_operand);
+
+  /* If either operand is a SAVE_EXPR (possibly surrounded by
+     arithmetic, make sure it gets done.  */
+  true_operand  = skip_simple_arithmetic (true_operand);
+  false_operand = skip_simple_arithmetic (false_operand);
+
+  if (TREE_CODE (true_operand) == SAVE_EXPR)
+    result = build2 (COMPOUND_EXPR, result_type, true_operand, result);
+
+  if (TREE_CODE (false_operand) == SAVE_EXPR)
+    result = build2 (COMPOUND_EXPR, result_type, false_operand, result);
+
+  /* ??? Seems the code above is wrong, as it may move ahead of the COND
+     SAVE_EXPRs with side effects and not shared by both arms.  */
+
+ if (addr_p)
+    result = build_unary_op (INDIRECT_REF, NULL_TREE, result);
+
+  return result;
+}
+
+/* Similar, but for RETURN_EXPR.  If RESULT_DECL is non-zero, build
+   a RETURN_EXPR around the assignment of RET_VAL to RESULT_DECL.
+   If RESULT_DECL is zero, build a bare RETURN_EXPR.  */
+
+tree
+build_return_expr (tree result_decl, tree ret_val)
+{
+  tree result_expr;
+
+  if (result_decl)
+    {
+      /* The gimplifier explicitly enforces the following invariant:
+
+           RETURN_EXPR
+               |
+           MODIFY_EXPR
+           /        \
+          /          \
+      RESULT_DECL    ...
+
+      As a consequence, type-homogeneity dictates that we use the type
+      of the RESULT_DECL as the operation type.  */
+
+      tree operation_type = TREE_TYPE (result_decl);
+
+      /* Convert the right operand to the operation type.  Note that
+         it's the same transformation as in the MODIFY_EXPR case of
+         build_binary_op with the additional guarantee that the type
+         cannot involve a placeholder, since otherwise the function
+         would use the "target pointer" return mechanism.  */
+
+      if (operation_type != TREE_TYPE (ret_val))
+	ret_val = convert (operation_type, ret_val);
+
+      result_expr
+	= build2 (MODIFY_EXPR, operation_type, result_decl, ret_val);
+    }
+  else
+    result_expr = NULL_TREE;
+
+  return build1 (RETURN_EXPR, void_type_node, result_expr);
+}
+
+/* Build a CALL_EXPR to call FUNDECL with one argument, ARG.  Return
+   the CALL_EXPR.  */
+
+tree
+build_call_1_expr (tree fundecl, tree arg)
+{
+  tree call = build_call_nary (TREE_TYPE (TREE_TYPE (fundecl)),
+			       build_unary_op (ADDR_EXPR, NULL_TREE, fundecl),
+			       1, arg);
+  TREE_SIDE_EFFECTS (call) = 1;
+  return call;
+}
+
+/* Build a CALL_EXPR to call FUNDECL with two arguments, ARG1 & ARG2.  Return
+   the CALL_EXPR.  */
+
+tree
+build_call_2_expr (tree fundecl, tree arg1, tree arg2)
+{
+  tree call = build_call_nary (TREE_TYPE (TREE_TYPE (fundecl)),
+			       build_unary_op (ADDR_EXPR, NULL_TREE, fundecl),
+			       2, arg1, arg2);
+  TREE_SIDE_EFFECTS (call) = 1;
+  return call;
+}
+
+/* Likewise to call FUNDECL with no arguments.  */
+
+tree
+build_call_0_expr (tree fundecl)
+{
+  /* We rely on build_call_nary to compute TREE_SIDE_EFFECTS.  This makes
+     it possible to propagate DECL_IS_PURE on parameterless functions.  */
+  tree call = build_call_nary (TREE_TYPE (TREE_TYPE (fundecl)),
+			       build_unary_op (ADDR_EXPR, NULL_TREE, fundecl),
+			       0);
+  return call;
+}
+
+/* Call a function that raises an exception and pass the line number and file
+   name, if requested.  MSG says which exception function to call.
+
+   GNAT_NODE is the gnat node conveying the source location for which the
+   error should be signaled, or Empty in which case the error is signaled on
+   the current ref_file_name/input_line.
+
+   KIND says which kind of exception this is for
+   (N_Raise_{Constraint,Storage,Program}_Error).  */
+
+tree
+build_call_raise (int msg, Node_Id gnat_node, char kind)
+{
+  tree fndecl = gnat_raise_decls[msg];
+  tree label = get_exception_label (kind);
+  tree filename;
+  int line_number;
+  const char *str;
+  int len;
+
+  /* If this is to be done as a goto, handle that case.  */
+  if (label)
+    {
+      Entity_Id local_raise = Get_Local_Raise_Call_Entity ();
+      tree gnu_result = build1 (GOTO_EXPR, void_type_node, label);
+
+      /* If Local_Raise is present, generate
+	 Local_Raise (exception'Identity);  */
+      if (Present (local_raise))
+	{
+	  tree gnu_local_raise
+	    = gnat_to_gnu_entity (local_raise, NULL_TREE, 0);
+	  tree gnu_exception_entity
+	    = gnat_to_gnu_entity (Get_RT_Exception_Entity (msg), NULL_TREE, 0);
+	  tree gnu_call
+	    = build_call_1_expr (gnu_local_raise,
+				 build_unary_op (ADDR_EXPR, NULL_TREE,
+						 gnu_exception_entity));
+
+	  gnu_result = build2 (COMPOUND_EXPR, void_type_node,
+			       gnu_call, gnu_result);}
+
+      return gnu_result;
+    }
+
+  str
+    = (Debug_Flag_NN || Exception_Locations_Suppressed)
+      ? ""
+      : (gnat_node != Empty && Sloc (gnat_node) != No_Location)
+        ? IDENTIFIER_POINTER
+          (get_identifier (Get_Name_String
+			   (Debug_Source_Name
+			    (Get_Source_File_Index (Sloc (gnat_node))))))
+        : ref_filename;
+
+  len = strlen (str) + 1;
+  filename = build_string (len, str);
+  line_number
+    = (gnat_node != Empty && Sloc (gnat_node) != No_Location)
+      ? Get_Logical_Line_Number (Sloc(gnat_node)) : input_line;
+
+  TREE_TYPE (filename)
+    = build_array_type (char_type_node,
+			build_index_type (build_int_cst (NULL_TREE, len)));
+
+  return
+    build_call_2_expr (fndecl,
+		       build1 (ADDR_EXPR, build_pointer_type (char_type_node),
+			       filename),
+		       build_int_cst (NULL_TREE, line_number));
+}
+
+/* qsort comparer for the bit positions of two constructor elements
+   for record components.  */
+
+static int
+compare_elmt_bitpos (const PTR rt1, const PTR rt2)
+{
+  const_tree const elmt1 = * (const_tree const *) rt1;
+  const_tree const elmt2 = * (const_tree const *) rt2;
+  const_tree const field1 = TREE_PURPOSE (elmt1);
+  const_tree const field2 = TREE_PURPOSE (elmt2);
+  const int ret
+    = tree_int_cst_compare (bit_position (field1), bit_position (field2));
+
+  return ret ? ret : (int) (DECL_UID (field1) - DECL_UID (field2));
+}
+
+/* Return a CONSTRUCTOR of TYPE whose list is LIST.  */
+
+tree
+gnat_build_constructor (tree type, tree list)
+{
+  tree elmt;
+  int n_elmts;
+  bool allconstant = (TREE_CODE (TYPE_SIZE (type)) == INTEGER_CST);
+  bool side_effects = false;
+  tree result;
+
+  /* Scan the elements to see if they are all constant or if any has side
+     effects, to let us set global flags on the resulting constructor.  Count
+     the elements along the way for possible sorting purposes below.  */
+  for (n_elmts = 0, elmt = list; elmt; elmt = TREE_CHAIN (elmt), n_elmts ++)
+    {
+      if (!TREE_CONSTANT (TREE_VALUE (elmt))
+	  || (TREE_CODE (type) == RECORD_TYPE
+	      && DECL_BIT_FIELD (TREE_PURPOSE (elmt))
+	      && TREE_CODE (TREE_VALUE (elmt)) != INTEGER_CST)
+	  || !initializer_constant_valid_p (TREE_VALUE (elmt),
+					    TREE_TYPE (TREE_VALUE (elmt))))
+	allconstant = false;
+
+      if (TREE_SIDE_EFFECTS (TREE_VALUE (elmt)))
+	side_effects = true;
+
+      /* Propagate an NULL_EXPR from the size of the type.  We won't ever
+	 be executing the code we generate here in that case, but handle it
+	 specially to avoid the compiler blowing up.  */
+      if (TREE_CODE (type) == RECORD_TYPE
+	  && (0 != (result
+		    = contains_null_expr (DECL_SIZE (TREE_PURPOSE (elmt))))))
+	return build1 (NULL_EXPR, type, TREE_OPERAND (result, 0));
+    }
+
+  /* For record types with constant components only, sort field list
+     by increasing bit position.  This is necessary to ensure the
+     constructor can be output as static data.  */
+  if (allconstant && TREE_CODE (type) == RECORD_TYPE && n_elmts > 1)
+    {
+      /* Fill an array with an element tree per index, and ask qsort to order
+	 them according to what a bitpos comparison function says.  */
+      tree *gnu_arr = (tree *) alloca (sizeof (tree) * n_elmts);
+      int i;
+
+      for (i = 0, elmt = list; elmt; elmt = TREE_CHAIN (elmt), i++)
+	gnu_arr[i] = elmt;
+
+      qsort (gnu_arr, n_elmts, sizeof (tree), compare_elmt_bitpos);
+
+      /* Then reconstruct the list from the sorted array contents.  */
+      list = NULL_TREE;
+      for (i = n_elmts - 1; i >= 0; i--)
+	{
+	  TREE_CHAIN (gnu_arr[i]) = list;
+	  list = gnu_arr[i];
+	}
+    }
+
+  result = build_constructor_from_list (type, list);
+  TREE_CONSTANT (result) = TREE_STATIC (result) = allconstant;
+  TREE_SIDE_EFFECTS (result) = side_effects;
+  TREE_READONLY (result) = TYPE_READONLY (type) || allconstant;
+  return result;
+}
+
+/* Return a COMPONENT_REF to access a field that is given by COMPONENT,
+   an IDENTIFIER_NODE giving the name of the field, or FIELD, a FIELD_DECL,
+   for the field.  Don't fold the result if NO_FOLD_P is true.
+
+   We also handle the fact that we might have been passed a pointer to the
+   actual record and know how to look for fields in variant parts.  */
+
+static tree
+build_simple_component_ref (tree record_variable, tree component,
+                            tree field, bool no_fold_p)
+{
+  tree record_type = TYPE_MAIN_VARIANT (TREE_TYPE (record_variable));
+  tree ref, inner_variable;
+
+  gcc_assert ((TREE_CODE (record_type) == RECORD_TYPE
+	       || TREE_CODE (record_type) == UNION_TYPE
+	       || TREE_CODE (record_type) == QUAL_UNION_TYPE)
+	      && TYPE_SIZE (record_type)
+	      && (component != 0) != (field != 0));
+
+  /* If no field was specified, look for a field with the specified name
+     in the current record only.  */
+  if (!field)
+    for (field = TYPE_FIELDS (record_type); field;
+	 field = TREE_CHAIN (field))
+      if (DECL_NAME (field) == component)
+	break;
+
+  if (!field)
+    return NULL_TREE;
+
+  /* If this field is not in the specified record, see if we can find
+     something in the record whose original field is the same as this one. */
+  if (DECL_CONTEXT (field) != record_type)
+    /* Check if there is a field with name COMPONENT in the record.  */
+    {
+      tree new_field;
+
+      /* First loop thru normal components.  */
+
+      for (new_field = TYPE_FIELDS (record_type); new_field;
+	   new_field = TREE_CHAIN (new_field))
+	if (field == new_field
+	    || DECL_ORIGINAL_FIELD (new_field) == field
+	    || new_field == DECL_ORIGINAL_FIELD (field)
+	    || (DECL_ORIGINAL_FIELD (field)
+		&& (DECL_ORIGINAL_FIELD (field)
+		    == DECL_ORIGINAL_FIELD (new_field))))
+	  break;
+
+      /* Next, loop thru DECL_INTERNAL_P components if we haven't found
+         the component in the first search. Doing this search in 2 steps
+         is required to avoiding hidden homonymous fields in the
+         _Parent field.  */
+
+      if (!new_field)
+	for (new_field = TYPE_FIELDS (record_type); new_field;
+	     new_field = TREE_CHAIN (new_field))
+	  if (DECL_INTERNAL_P (new_field))
+	    {
+	      tree field_ref
+		= build_simple_component_ref (record_variable,
+					      NULL_TREE, new_field, no_fold_p);
+	      ref = build_simple_component_ref (field_ref, NULL_TREE, field,
+						no_fold_p);
+
+	      if (ref)
+		return ref;
+	    }
+
+      field = new_field;
+    }
+
+  if (!field)
+    return NULL_TREE;
+
+  /* If the field's offset has overflowed, do not attempt to access it
+     as doing so may trigger sanity checks deeper in the back-end.
+     Note that we don't need to warn since this will be done on trying
+     to declare the object.  */
+  if (TREE_CODE (DECL_FIELD_OFFSET (field)) == INTEGER_CST
+      && TREE_OVERFLOW (DECL_FIELD_OFFSET (field)))
+    return NULL_TREE;
+
+  /* Look through conversion between type variants.  Note that this
+     is transparent as far as the field is concerned.  */
+  if (TREE_CODE (record_variable) == VIEW_CONVERT_EXPR
+      && TYPE_MAIN_VARIANT (TREE_TYPE (TREE_OPERAND (record_variable, 0)))
+	 == record_type)
+    inner_variable = TREE_OPERAND (record_variable, 0);
+  else
+    inner_variable = record_variable;
+
+  ref = build3 (COMPONENT_REF, TREE_TYPE (field), inner_variable, field,
+		NULL_TREE);
+
+  if (TREE_READONLY (record_variable) || TREE_READONLY (field))
+    TREE_READONLY (ref) = 1;
+  if (TREE_THIS_VOLATILE (record_variable) || TREE_THIS_VOLATILE (field)
+      || TYPE_VOLATILE (record_type))
+    TREE_THIS_VOLATILE (ref) = 1;
+
+  if (no_fold_p)
+    return ref;
+
+  /* The generic folder may punt in this case because the inner array type
+     can be self-referential, but folding is in fact not problematic.  */
+  else if (TREE_CODE (record_variable) == CONSTRUCTOR
+	   && TYPE_CONTAINS_TEMPLATE_P (TREE_TYPE (record_variable)))
+    {
+      VEC(constructor_elt,gc) *elts = CONSTRUCTOR_ELTS (record_variable);
+      unsigned HOST_WIDE_INT idx;
+      tree index, value;
+      FOR_EACH_CONSTRUCTOR_ELT (elts, idx, index, value)
+	if (index == field)
+	  return value;
+      return ref;
+    }
+
+  else
+    return fold (ref);
+}
+
+/* Like build_simple_component_ref, except that we give an error if the
+   reference could not be found.  */
+
+tree
+build_component_ref (tree record_variable, tree component,
+                     tree field, bool no_fold_p)
+{
+  tree ref = build_simple_component_ref (record_variable, component, field,
+					 no_fold_p);
+
+  if (ref)
+    return ref;
+
+  /* If FIELD was specified, assume this is an invalid user field so
+     raise constraint error.  Otherwise, we can't find the type to return, so
+     abort.  */
+  gcc_assert (field);
+  return build1 (NULL_EXPR, TREE_TYPE (field),
+		 build_call_raise (CE_Discriminant_Check_Failed, Empty,
+				   N_Raise_Constraint_Error));
+}
+
+/* Build a GCC tree to call an allocation or deallocation function.
+   If GNU_OBJ is nonzero, it is an object to deallocate.  Otherwise,
+   generate an allocator.
+
+   GNU_SIZE is the size of the object in bytes and ALIGN is the alignment in
+   bits.  GNAT_PROC, if present, is a procedure to call and GNAT_POOL is the
+   storage pool to use.  If not preset, malloc and free will be used except
+   if GNAT_PROC is the "fake" value of -1, in which case we allocate the
+   object dynamically on the stack frame.  */
+
+tree
+build_call_alloc_dealloc (tree gnu_obj, tree gnu_size, unsigned align,
+                          Entity_Id gnat_proc, Entity_Id gnat_pool,
+                          Node_Id gnat_node)
+{
+  tree gnu_align = size_int (align / BITS_PER_UNIT);
+
+  gnu_size = SUBSTITUTE_PLACEHOLDER_IN_EXPR (gnu_size, gnu_obj);
+
+  if (Present (gnat_proc))
+    {
+      /* The storage pools are obviously always tagged types, but the
+	 secondary stack uses the same mechanism and is not tagged */
+      if (Is_Tagged_Type (Etype (gnat_pool)))
+	{
+	  /* The size is the third parameter; the alignment is the
+             same type.  */
+	  Entity_Id gnat_size_type
+	    = Etype (Next_Formal (Next_Formal (First_Formal (gnat_proc))));
+	  tree gnu_size_type = gnat_to_gnu_type (gnat_size_type);
+	  tree gnu_proc = gnat_to_gnu (gnat_proc);
+	  tree gnu_proc_addr = build_unary_op (ADDR_EXPR, NULL_TREE, gnu_proc);
+	  tree gnu_pool = gnat_to_gnu (gnat_pool);
+	  tree gnu_pool_addr = build_unary_op (ADDR_EXPR, NULL_TREE, gnu_pool);
+	  tree gnu_call;
+
+	  gnu_size = convert (gnu_size_type, gnu_size);
+	  gnu_align = convert (gnu_size_type, gnu_align);
+
+	  /* The first arg is always the address of the storage pool; next
+	     comes the address of the object, for a deallocator, then the
+	     size and alignment.  */
+	  if (gnu_obj)
+	    gnu_call = build_call_nary (TREE_TYPE (TREE_TYPE (gnu_proc)),
+					gnu_proc_addr, 4, gnu_pool_addr,
+					gnu_obj, gnu_size, gnu_align);
+	  else
+	    gnu_call = build_call_nary (TREE_TYPE (TREE_TYPE (gnu_proc)),
+					gnu_proc_addr, 3, gnu_pool_addr,
+					gnu_size, gnu_align);
+	  TREE_SIDE_EFFECTS (gnu_call) = 1;
+	  return gnu_call;
+	}
+
+      /* Secondary stack case.  */
+      else
+	{
+	  /* The size is the second parameter */
+	  Entity_Id gnat_size_type
+	    = Etype (Next_Formal (First_Formal (gnat_proc)));
+	  tree gnu_size_type = gnat_to_gnu_type (gnat_size_type);
+	  tree gnu_proc = gnat_to_gnu (gnat_proc);
+	  tree gnu_proc_addr = build_unary_op (ADDR_EXPR, NULL_TREE, gnu_proc);
+	  tree gnu_call;
+
+	  gnu_size = convert (gnu_size_type, gnu_size);
+
+	  /* The first arg is the address of the object, for a
+	     deallocator, then the size */
+	  if (gnu_obj)
+	    gnu_call = build_call_nary (TREE_TYPE (TREE_TYPE (gnu_proc)),
+					gnu_proc_addr, 2, gnu_obj, gnu_size);
+	  else
+	    gnu_call = build_call_nary (TREE_TYPE (TREE_TYPE (gnu_proc)),
+					gnu_proc_addr, 1, gnu_size);
+	  TREE_SIDE_EFFECTS (gnu_call) = 1;
+	  return gnu_call;
+	}
+    }
+
+  else if (gnu_obj)
+    return build_call_1_expr (free_decl, gnu_obj);
+
+  /* ??? For now, disable variable-sized allocators in the stack since
+     we can't yet gimplify an ALLOCATE_EXPR.  */
+  else if (gnat_pool == -1
+	   && TREE_CODE (gnu_size) == INTEGER_CST && !flag_stack_check)
+    {
+      /* If the size is a constant, we can put it in the fixed portion of
+	 the stack frame to avoid the need to adjust the stack pointer.  */
+      if (TREE_CODE (gnu_size) == INTEGER_CST && !flag_stack_check)
+	{
+	  tree gnu_range
+	    = build_range_type (NULL_TREE, size_one_node, gnu_size);
+	  tree gnu_array_type = build_array_type (char_type_node, gnu_range);
+	  tree gnu_decl
+	    = create_var_decl (get_identifier ("RETVAL"), NULL_TREE,
+			       gnu_array_type, NULL_TREE, false, false, false,
+			       false, NULL, gnat_node);
+
+	  return convert (ptr_void_type_node,
+			  build_unary_op (ADDR_EXPR, NULL_TREE, gnu_decl));
+	}
+      else
+	gcc_unreachable ();
+#if 0
+	return build2 (ALLOCATE_EXPR, ptr_void_type_node, gnu_size, gnu_align);
+#endif
+    }
+  else
+    {
+      if (Nkind (gnat_node) != N_Allocator || !Comes_From_Source (gnat_node))
+        Check_No_Implicit_Heap_Alloc (gnat_node);
+
+      /* If the allocator size is 32bits but the pointer size is 64bits then
+	 allocate 32bit memory (sometimes necessary on 64bit VMS). Otherwise
+	 default to standard malloc. */
+      if (UI_To_Int (Esize (Etype (gnat_node))) == 32 && POINTER_SIZE == 64)
+        return build_call_1_expr (malloc32_decl, gnu_size);
+      else
+        return build_call_1_expr (malloc_decl, gnu_size);
+    }
+}
+
+/* Build a GCC tree to correspond to allocating an object of TYPE whose
+   initial value is INIT, if INIT is nonzero.  Convert the expression to
+   RESULT_TYPE, which must be some type of pointer.  Return the tree.
+   GNAT_PROC and GNAT_POOL optionally give the procedure to call and
+   the storage pool to use.  GNAT_NODE is used to provide an error
+   location for restriction violations messages.  If IGNORE_INIT_TYPE is
+   true, ignore the type of INIT for the purpose of determining the size;
+   this will cause the maximum size to be allocated if TYPE is of
+   self-referential size.  */
+
+tree
+build_allocator (tree type, tree init, tree result_type, Entity_Id gnat_proc,
+                 Entity_Id gnat_pool, Node_Id gnat_node, bool ignore_init_type)
+{
+  tree size = TYPE_SIZE_UNIT (type);
+  tree result;
+  unsigned int default_allocator_alignment
+    = get_target_default_allocator_alignment () * BITS_PER_UNIT;
+
+  /* If the initializer, if present, is a NULL_EXPR, just return a new one.  */
+  if (init && TREE_CODE (init) == NULL_EXPR)
+    return build1 (NULL_EXPR, result_type, TREE_OPERAND (init, 0));
+
+  /* If RESULT_TYPE is a fat or thin pointer, set SIZE to be the sum of the
+     sizes of the object and its template.  Allocate the whole thing and
+     fill in the parts that are known.  */
+  else if (TYPE_FAT_OR_THIN_POINTER_P (result_type))
+    {
+      tree storage_type
+	= build_unc_object_type_from_ptr (result_type, type,
+					  get_identifier ("ALLOC"));
+      tree template_type = TREE_TYPE (TYPE_FIELDS (storage_type));
+      tree storage_ptr_type = build_pointer_type (storage_type);
+      tree storage;
+      tree template_cons = NULL_TREE;
+
+      size = SUBSTITUTE_PLACEHOLDER_IN_EXPR (TYPE_SIZE_UNIT (storage_type),
+					     init);
+
+      /* If the size overflows, pass -1 so the allocator will raise
+	 storage error.  */
+      if (TREE_CODE (size) == INTEGER_CST && TREE_OVERFLOW (size))
+	size = ssize_int (-1);
+
+      storage = build_call_alloc_dealloc (NULL_TREE, size,
+					  TYPE_ALIGN (storage_type),
+					  gnat_proc, gnat_pool, gnat_node);
+      storage = convert (storage_ptr_type, protect_multiple_eval (storage));
+
+      if (TREE_CODE (type) == RECORD_TYPE && TYPE_IS_PADDING_P (type))
+	{
+	  type = TREE_TYPE (TYPE_FIELDS (type));
+
+	  if (init)
+	    init = convert (type, init);
+	}
+
+      /* If there is an initializing expression, make a constructor for
+	 the entire object including the bounds and copy it into the
+	 object.  If there is no initializing expression, just set the
+	 bounds.  */
+      if (init)
+	{
+	  template_cons = tree_cons (TREE_CHAIN (TYPE_FIELDS (storage_type)),
+				     init, NULL_TREE);
+	  template_cons = tree_cons (TYPE_FIELDS (storage_type),
+				     build_template (template_type, type,
+						     init),
+				     template_cons);
+
+	  return convert
+	    (result_type,
+	     build2 (COMPOUND_EXPR, storage_ptr_type,
+		     build_binary_op
+		     (MODIFY_EXPR, storage_type,
+		      build_unary_op (INDIRECT_REF, NULL_TREE,
+				      convert (storage_ptr_type, storage)),
+		      gnat_build_constructor (storage_type, template_cons)),
+		     convert (storage_ptr_type, storage)));
+	}
+      else
+	return build2
+	  (COMPOUND_EXPR, result_type,
+	   build_binary_op
+	   (MODIFY_EXPR, template_type,
+	    build_component_ref
+	    (build_unary_op (INDIRECT_REF, NULL_TREE,
+			     convert (storage_ptr_type, storage)),
+	     NULL_TREE, TYPE_FIELDS (storage_type), 0),
+	    build_template (template_type, type, NULL_TREE)),
+	   convert (result_type, convert (storage_ptr_type, storage)));
+    }
+
+  /* If we have an initializing expression, see if its size is simpler
+     than the size from the type.  */
+  if (!ignore_init_type && init && TYPE_SIZE_UNIT (TREE_TYPE (init))
+      && (TREE_CODE (TYPE_SIZE_UNIT (TREE_TYPE (init))) == INTEGER_CST
+	  || CONTAINS_PLACEHOLDER_P (size)))
+    size = TYPE_SIZE_UNIT (TREE_TYPE (init));
+
+  /* If the size is still self-referential, reference the initializing
+     expression, if it is present.  If not, this must have been a
+     call to allocate a library-level object, in which case we use
+     the maximum size.  */
+  if (CONTAINS_PLACEHOLDER_P (size))
+    {
+      if (!ignore_init_type && init)
+	size = substitute_placeholder_in_expr (size, init);
+      else
+	size = max_size (size, true);
+    }
+
+  /* If the size overflows, pass -1 so the allocator will raise
+     storage error.  */
+  if (TREE_CODE (size) == INTEGER_CST && TREE_OVERFLOW (size))
+    size = ssize_int (-1);
+
+  /* If this is in the default storage pool and the type alignment is larger
+     than what the default allocator supports, make an "aligning" record type
+     with room to store a pointer before the field, allocate an object of that
+     type, store the system's allocator return value just in front of the
+     field and return the field's address.  */
+
+  if (No (gnat_proc) && TYPE_ALIGN (type) > default_allocator_alignment)
+    {
+      /* Construct the aligning type with enough room for a pointer ahead
+	 of the field, then allocate.  */
+      tree record_type
+	= make_aligning_type (type, TYPE_ALIGN (type), size,
+			      default_allocator_alignment,
+			      POINTER_SIZE / BITS_PER_UNIT);
+
+      tree record, record_addr;
+
+      record_addr
+	= build_call_alloc_dealloc (NULL_TREE, TYPE_SIZE_UNIT (record_type),
+				    default_allocator_alignment, Empty, Empty,
+				    gnat_node);
+
+      record_addr
+	= convert (build_pointer_type (record_type),
+		   save_expr (record_addr));
+
+      record = build_unary_op (INDIRECT_REF, NULL_TREE, record_addr);
+
+      /* Our RESULT (the Ada allocator's value) is the super-aligned address
+	 of the internal record field ... */
+      result
+	= build_unary_op (ADDR_EXPR, NULL_TREE,
+			  build_component_ref
+			  (record, NULL_TREE, TYPE_FIELDS (record_type), 0));
+      result = convert (result_type, result);
+
+      /* ... with the system allocator's return value stored just in
+	 front.  */
+      {
+	tree ptr_addr
+	  = build_binary_op (POINTER_PLUS_EXPR, ptr_void_type_node,
+			     convert (ptr_void_type_node, result),
+			     size_int (-POINTER_SIZE/BITS_PER_UNIT));
+
+	tree ptr_ref
+	  = convert (build_pointer_type (ptr_void_type_node), ptr_addr);
+
+	result
+	  = build2 (COMPOUND_EXPR, TREE_TYPE (result),
+		    build_binary_op (MODIFY_EXPR, NULL_TREE,
+				     build_unary_op (INDIRECT_REF, NULL_TREE,
+						     ptr_ref),
+				     convert (ptr_void_type_node,
+					      record_addr)),
+		    result);
+      }
+    }
+  else
+    result = convert (result_type,
+		      build_call_alloc_dealloc (NULL_TREE, size,
+						TYPE_ALIGN (type),
+						gnat_proc,
+						gnat_pool,
+						gnat_node));
+
+  /* If we have an initial value, put the new address into a SAVE_EXPR, assign
+     the value, and return the address.  Do this with a COMPOUND_EXPR.  */
+
+  if (init)
+    {
+      result = save_expr (result);
+      result
+	= build2 (COMPOUND_EXPR, TREE_TYPE (result),
+		  build_binary_op
+		  (MODIFY_EXPR, NULL_TREE,
+		   build_unary_op (INDIRECT_REF,
+				   TREE_TYPE (TREE_TYPE (result)), result),
+		   init),
+		  result);
+    }
+
+  return convert (result_type, result);
+}
+
+/* Fill in a VMS descriptor for EXPR and return a constructor for it.
+   GNAT_FORMAL is how we find the descriptor record.  */
+
+tree
+fill_vms_descriptor (tree expr, Entity_Id gnat_formal)
+{
+  tree record_type = TREE_TYPE (TREE_TYPE (get_gnu_tree (gnat_formal)));
+  tree field;
+  tree const_list = NULL_TREE;
+
+  expr = maybe_unconstrained_array (expr);
+  gnat_mark_addressable (expr);
+
+  for (field = TYPE_FIELDS (record_type); field; field = TREE_CHAIN (field))
+    const_list
+      = tree_cons (field,
+		   convert (TREE_TYPE (field),
+			    SUBSTITUTE_PLACEHOLDER_IN_EXPR
+			    (DECL_INITIAL (field), expr)),
+		   const_list);
+
+  return gnat_build_constructor (record_type, nreverse (const_list));
+}
+
+/* Indicate that we need to make the address of EXPR_NODE and it therefore
+   should not be allocated in a register.  Returns true if successful.  */
+
+bool
+gnat_mark_addressable (tree expr_node)
+{
+  while (1)
+    switch (TREE_CODE (expr_node))
+      {
+      case ADDR_EXPR:
+      case COMPONENT_REF:
+      case ARRAY_REF:
+      case ARRAY_RANGE_REF:
+      case REALPART_EXPR:
+      case IMAGPART_EXPR:
+      case VIEW_CONVERT_EXPR:
+      case NON_LVALUE_EXPR:
+      CASE_CONVERT:
+	expr_node = TREE_OPERAND (expr_node, 0);
+	break;
+
+      case CONSTRUCTOR:
+	TREE_ADDRESSABLE (expr_node) = 1;
+	return true;
+
+      case VAR_DECL:
+      case PARM_DECL:
+      case RESULT_DECL:
+	TREE_ADDRESSABLE (expr_node) = 1;
+	return true;
+
+      case FUNCTION_DECL:
+	TREE_ADDRESSABLE (expr_node) = 1;
+	return true;
+
+      case CONST_DECL:
+	return (DECL_CONST_CORRESPONDING_VAR (expr_node)
+		&& (gnat_mark_addressable
+		    (DECL_CONST_CORRESPONDING_VAR (expr_node))));
+      default:
+	return true;
+    }
+}
-- 
2.30.2