stor-layout.c (reference_types_internal): New variable.

	* stor-layout.c (reference_types_internal): New variable.
	(internal_reference_types): New function.
	(layout_type, case REFERENCE_TYPE): Make Pmode if internal.
	* tree.h (internal_reference_types): New declaration.

From-SVN: r39491

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 121a527554a56b458e518f26ece90ba64c59978b..e0a23adc1ddf52290c57fb10905a7aebc4fe736c 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,10 @@
 Tue Feb  6 07:54:51 2001  Richard Kenner  <kenner@vlsi1.ultra.nyu.edu>
 
+       * stor-layout.c (reference_types_internal): New variable.
+       (internal_reference_types): New function.
+       (layout_type, case REFERENCE_TYPE): Make Pmode if internal.
+       * tree.h (internal_reference_types): New declaration.
+
        * cse.c (find_best_addr): Fix typo in computing cost.
 
 Mon Feb  5 21:56:16 2001  Richard Kenner  <kenner@vlsi1.ultra.nyu.edu>

diff --git a/gcc/stor-layout.c b/gcc/stor-layout.c
index 0f057efd4a0fa49ec2cece69a84f6471a21684c2..7bb5b4a2636a6923e99e57f27b0ad7814970111c 100644 (file)
--- a/gcc/stor-layout.c
+++ b/gcc/stor-layout.c
@@ -1,6 +1,6 @@
 /* C-compiler utilities for types and variables storage layout
    Copyright (C) 1987, 1988, 1992, 1993, 1994, 1995, 1996, 1996, 1998,
-   1999, 2000 Free Software Foundation, Inc.
+   1999, 2000, 2001 Free Software Foundation, Inc.
 
 This file is part of GNU CC.
 
@@ -50,6 +50,11 @@ unsigned int maximum_field_alignment;
    May be overridden by front-ends.  */
 unsigned int set_alignment = 0;
 
+/* Nonzero if all REFERENCE_TYPEs are internal and hence should be
+   allocated in Pmode, not ptr_mode.   Set only by internal_reference_types
+   called only by a front end.  */
+static int reference_types_internal = 0;
+
 static void finalize_record_size       PARAMS ((record_layout_info));
 static void finalize_type_size         PARAMS ((tree));
 static void place_union_field          PARAMS ((record_layout_info, tree));
@@ -64,6 +69,15 @@ static tree pending_sizes;
 
 int immediate_size_expand;
 
+/* Show that REFERENCE_TYPES are internal and should be Pmode.  Called only
+   by front end.  */
+
+void
+internal_reference_types ()
+{
+  reference_types_internal = 1;
+}
+
 /* Get a list of all the objects put on the pending sizes list.  */
 
 tree
@@ -1315,11 +1329,17 @@ layout_type (type)
 
     case POINTER_TYPE:
     case REFERENCE_TYPE:
-      TYPE_MODE (type) = ptr_mode;
-      TYPE_SIZE (type) = bitsize_int (POINTER_SIZE);
-      TYPE_SIZE_UNIT (type) = size_int (POINTER_SIZE / BITS_PER_UNIT);
-      TREE_UNSIGNED (type) = 1;
-      TYPE_PRECISION (type) = POINTER_SIZE;
+      {
+       int nbits = ((TREE_CODE (type) == REFERENCE_TYPE
+                     && reference_types_internal)
+                    ? GET_MODE_BITSIZE (Pmode) : POINTER_SIZE);
+
+       TYPE_MODE (type) = nbits == POINTER_SIZE ? ptr_mode : Pmode;
+       TYPE_SIZE (type) = bitsize_int (nbits);
+       TYPE_SIZE_UNIT (type) = size_int (nbits / BITS_PER_UNIT);
+       TREE_UNSIGNED (type) = 1;
+       TYPE_PRECISION (type) = nbits;
+      }
       break;
 
     case ARRAY_TYPE:

diff --git a/gcc/tree.h b/gcc/tree.h
index f9da7c9a5b149b8a70ef7deff4ae9d76fed05436..33597d6f556922fb1390e7efd0c8cbf93a97b09a 100644 (file)
--- a/gcc/tree.h
+++ b/gcc/tree.h
@@ -2773,6 +2773,7 @@ extern void set_yydebug                   PARAMS ((int));
 
 /* In stor-layout.c */
 extern void fixup_signed_type          PARAMS ((tree));
+extern void internal_reference_types   PARAMS ((void));
 
 /* varasm.c */
 extern void make_decl_rtl              PARAMS ((tree, const char *));