From 965a7e9092ffbec64865a95b016f731782d4b965 Mon Sep 17 00:00:00 2001
From: Geoffrey Keating <geoffk@apple.com>
Date: Sat, 30 Oct 2004 02:48:49 +0000
Subject: [PATCH] darwin.h (ASM_SPEC): Simplify.

	* config/i386/darwin.h (ASM_SPEC): Simplify.
	(SUBTARGET_EXTRA_SPECS): Add darwin_subarch spec.
	* config/rs6000/darwin.h (DARWIN_SUBARCH_SPEC): New.
	(SUBTARGET_EXTRA_SPECS): Add darwin_subarch spec.
	* config/darwin.h (LINK_COMMAND_SPEC): Don't pass -arch here.
	(LINK_SPEC): Do pass -arch here.  Handle -force_cpusubtype_ALL
	in all cases.  Pass the right -arch or -arch_only based on -mcpu.
	(ASM_SPEC): Handle -force_cpusubtype_ALL.
	* doc/invoke.texi (Darwin Options): Improve documentation for
	Darwin linker (and libtool) switches.

From-SVN: r89877
---
 gcc/ChangeLog              | 11 +++++++++++
 gcc/config/darwin.h        | 11 ++++++-----
 gcc/config/i386/darwin.h   | 13 +++++--------
 gcc/config/rs6000/darwin.h | 22 +++++++++++++++++++++-
 gcc/doc/invoke.texi        | 33 +++++++++++++++++++++++----------
 gcc/tree-ssa-operands.c    |  2 ++
 6 files changed, 68 insertions(+), 24 deletions(-)

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 6ac0249c556..2dd6438805c 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -43,6 +43,17 @@
 
 2004-10-29  Geoffrey Keating  <geoffk@apple.com>
 
+	* config/i386/darwin.h (ASM_SPEC): Simplify.
+	(SUBTARGET_EXTRA_SPECS): Add darwin_subarch spec.
+	* config/rs6000/darwin.h (DARWIN_SUBARCH_SPEC): New.
+	(SUBTARGET_EXTRA_SPECS): Add darwin_subarch spec.
+	* config/darwin.h (LINK_COMMAND_SPEC): Don't pass -arch here.
+	(LINK_SPEC): Do pass -arch here.  Handle -force_cpusubtype_ALL
+	in all cases.  Pass the right -arch or -arch_only based on -mcpu.
+	(ASM_SPEC): Handle -force_cpusubtype_ALL.
+	* doc/invoke.texi (Darwin Options): Improve documentation for
+	Darwin linker (and libtool) switches.
+
 	* config/rs6000/darwin-fallback.c: Include <mach/thread_status.h>.
 
 2004-10-29  Stan Shebs  <shebs@apple.com>
diff --git a/gcc/config/darwin.h b/gcc/config/darwin.h
index 098caa2d76d..83aa2ddb009 100644
--- a/gcc/config/darwin.h
+++ b/gcc/config/darwin.h
@@ -219,8 +219,6 @@ extern const char *darwin_fix_and_continue_switch;
 #define LINK_COMMAND_SPEC "\
 %{!fdump=*:%{!fsyntax-only:%{!precomp:%{!c:%{!M:%{!MM:%{!E:%{!S:\
     %{!Zdynamiclib:%(linker)}%{Zdynamiclib:/usr/bin/libtool} \
-    %{!Zdynamiclib:-arch %(darwin_arch)} \
-    %{Zdynamiclib:-arch_only %(darwin_arch)} \
     %l %X %{d} %{s} %{t} %{Z} \
     %{!Zdynamiclib:%{A} %{e*} %{m} %{N} %{n} %{r} %{u*} %{x} %{z}} \
     %{@:-o %f%u.out}%{!@:%{o*}%{!o:-o a.out}} \
@@ -240,13 +238,14 @@ extern const char *darwin_fix_and_continue_switch;
   "%{static}%{!static:-dynamic} \
    %{fgnu-runtime:%:replace-outfile(-lobjc -lobjc-gnu)}\
    %{!Zdynamiclib: \
+     %{Zforce_cpusubtype_ALL:-arch %(darwin_arch) -force_cpusubtype_ALL} \
+     %{!Zforce_cpusubtype_ALL:-arch %(darwin_subarch)} \
      %{Zbundle:-bundle} \
      %{Zbundle_loader*:-bundle_loader %*} \
      %{client_name*} \
      %{compatibility_version*:%e-compatibility_version only allowed with -dynamiclib\
 } \
      %{current_version*:%e-current_version only allowed with -dynamiclib} \
-     %{Zforce_cpusubtype_ALL:-force_cpusubtype_ALL} \
      %{Zforce_flat_namespace:-force_flat_namespace} \
      %{Zinstall_name*:%e-install_name only allowed with -dynamiclib} \
      %{keep_private_externs} \
@@ -258,7 +257,8 @@ extern const char *darwin_fix_and_continue_switch;
      %{client_name*:%e-client_name not allowed with -dynamiclib} \
      %{compatibility_version*} \
      %{current_version*} \
-     %{Zforce_cpusubtype_ALL:%e-force_cpusubtype_ALL not allowed with -dynamiclib} \
+     %{Zforce_cpusubtype_ALL:-arch_only %(darwin_arch)} \
+     %{!Zforce_cpusubtype_ALL: -arch_only %(darwin_subarch)} \
      %{Zforce_flat_namespace:%e-force_flat_namespace not allowed with -dynamiclib} \
      %{Zinstall_name*:-install_name %*} \
      %{keep_private_externs:%e-keep_private_externs not allowed with -dynamiclib} \
@@ -332,7 +332,8 @@ extern const char *darwin_fix_and_continue_switch;
 /* #define ENDFILE_SPEC "" */
 
 /* Default Darwin ASM_SPEC, very simple.  */
-#define ASM_SPEC "-arch %(darwin_arch)"
+#define ASM_SPEC "-arch %(darwin_arch) \
+  %{Zforce_cpusubtype_ALL:-force_cpusubtype_ALL}"
 
 /* We use Dbx symbol format.  */
 
diff --git a/gcc/config/i386/darwin.h b/gcc/config/i386/darwin.h
index c7b583d14bf..d36b511819e 100644
--- a/gcc/config/i386/darwin.h
+++ b/gcc/config/i386/darwin.h
@@ -45,16 +45,13 @@ Boston, MA 02111-1307, USA.  */
   %{g: %{!gfull: -feliminate-unused-debug-symbols %<gfull }}"
 
 #undef ASM_SPEC
-#define ASM_SPEC "-arch i686 \
-  -force_cpusubtype_ALL \
-  %{Zforce_cpusubtype_ALL:-force_cpusubtype_ALL} \
-  %{!Zforce_cpusubtype_ALL:%{mmmx:-force_cpusubtype_ALL}\
-			   %{msse:-force_cpusubtype_ALL}\
-			   %{msse2:-force_cpusubtype_ALL}}"
+#define ASM_SPEC "-arch i686 -force_cpusubtype_ALL"
 
 #undef SUBTARGET_EXTRA_SPECS
-#define SUBTARGET_EXTRA_SPECS			\
-  { "darwin_arch", "i686" },
+#define SUBTARGET_EXTRA_SPECS					\
+  { "darwin_arch", "i686" },					\
+  { "darwin_subarch", "%{march=pentium3:pentIIm3;:i686}" },
+   
 
 /* Use the following macro for any Darwin/x86-specific command-line option
    translation.  */
diff --git a/gcc/config/rs6000/darwin.h b/gcc/config/rs6000/darwin.h
index ea4ef1ac6b8..50c7bd37535 100644
--- a/gcc/config/rs6000/darwin.h
+++ b/gcc/config/rs6000/darwin.h
@@ -132,9 +132,29 @@ do {									\
 %{static: %{Zdynamic: %e conflicting code gen style switches are used}}\
 %{!static:%{!mdynamic-no-pic:-fPIC}}"
 
+#define DARWIN_SUBARCH_SPEC "			\
+ %{m64: ppc64}					\
+ %{!m64:					\
+ %{mcpu=601:ppc601;				\
+   mcpu=603:ppc603;				\
+   mcpu=603e:ppc603;				\
+   mcpu=604:ppc604;				\
+   mcpu=604e:ppc604e;				\
+   mcpu=740:ppc750;				\
+   mcpu=750:ppc750;				\
+   mcpu=G3:ppc750;				\
+   mcpu=7400:ppc7400;				\
+   mcpu=G4:ppc7400;				\
+   mcpu=7450:ppc7450;				\
+   mcpu=970:ppc970;				\
+   mcpu=power4:ppc970;				\
+   mcpu=G5:ppc970;				\
+   :ppc}}"
+
 #undef SUBTARGET_EXTRA_SPECS
 #define SUBTARGET_EXTRA_SPECS			\
-  { "darwin_arch", "%{m64:ppc64} %{!m64:ppc}" },
+  { "darwin_arch", "%{m64:ppc64;:ppc}" },	\
+  { "darwin_subarch", DARWIN_SUBARCH_SPEC },
 
 /* Output a .machine directive.  */
 #undef TARGET_ASM_FILE_START
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index c1d48eddfc6..a43fd7f270b 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -7185,7 +7185,17 @@ Like @option{-sim}, but pass linker options to locate initialized data at
 @cindex Darwin options
 
 These options are defined for all architectures running the Darwin operating
-system.  They are useful for compatibility with other Mac OS compilers.
+system.
+
+FSF GCC on Darwin does not create ``fat'' object files; it will create
+an object file for the single architecture that it was built to
+target.  Apple's GCC on Darwin does create ``fat'' files if multiple
+@option{-arch} options are used.
+
+The subtype of the file created (@var{ppc7400} or @var{ppc970} or
+@var{i686}) is determined by the flag that specifies the ISA
+that GCC is targetting, @option{-mcpu} or @option{-march}.  The
+@option{-force_cpusubtype_ALL} option can be used to override this.
 
 @table @gcctabopt
 @item -F@var{dir}
@@ -7272,12 +7282,20 @@ See man ld(1) for more information.
 
 @item -bundle_loader @var{executable}
 @opindex bundle_loader
-This specifies the @var{executable} that will be loading the build
+This option specifies the @var{executable} that will be loading the build
 output file being linked. See man ld(1) for more information.
 
-@item -allowable_client  @var{client_name}
-@itemx -arch_only
+@item -dynamiclib
+@opindex -dynamiclib
+When passed this option, GCC will produce a dynamic library instead of
+an executable when linking, using the Darwin @file{libtool} command.
 
+@item -force_cpusubtype_ALL
+@opindex -force_cpusubtype_ALL
+This causes GCC's output file to have the @var{ALL} subtype, instead of
+one controlled by the @option{-mcpu} or @option{-march} option.
+
+@item -allowable_client  @var{client_name}
 @itemx -client_name
 @itemx -compatibility_version
 @itemx -current_version
@@ -7286,11 +7304,9 @@ output file being linked. See man ld(1) for more information.
 @itemx -dylib_file
 @itemx -dylinker_install_name
 @itemx -dynamic
-@itemx -dynamiclib
 @itemx -exported_symbols_list
 @itemx -filelist
 @itemx -flat_namespace
-@itemx -force_cpusubtype_ALL
 @itemx -force_flat_namespace
 @itemx -headerpad_max_install_names
 @itemx -image_base
@@ -7339,7 +7355,6 @@ output file being linked. See man ld(1) for more information.
 @itemx -whatsloaded
 
 @opindex allowable_client
-@opindex arch_only
 @opindex client_name
 @opindex compatibility_version
 @opindex current_version
@@ -7348,11 +7363,9 @@ output file being linked. See man ld(1) for more information.
 @opindex dylib_file
 @opindex dylinker_install_name
 @opindex dynamic
-@opindex dynamiclib
 @opindex exported_symbols_list
 @opindex filelist
 @opindex flat_namespace
-@opindex force_cpusubtype_ALL
 @opindex force_flat_namespace
 @opindex headerpad_max_install_names
 @opindex image_base
@@ -7400,7 +7413,7 @@ output file being linked. See man ld(1) for more information.
 @opindex weak_reference_mismatches
 @opindex whatsloaded
 
-These options are available for Darwin linker. Darwin linker man page
+These options are passed to the Darwin linker.  The Darwin linker man page
 describes them in detail.
 @end table
 
diff --git a/gcc/tree-ssa-operands.c b/gcc/tree-ssa-operands.c
index 68acd7ceb18..78e2a43e9df 100644
--- a/gcc/tree-ssa-operands.c
+++ b/gcc/tree-ssa-operands.c
@@ -1623,6 +1623,8 @@ add_call_read_ops (tree stmt)
 {
   bitmap_iterator bi;
 
+  bi.ptr2 = NULL;
+
   /* Otherwise, if the function is not pure, it may reference memory.  Add
      a VUSE for .GLOBAL_VAR if it has been created.  Otherwise, add a VUSE
      for each call-clobbered variable.  See add_referenced_var for the
-- 
2.30.2