Redefine STACK_BOUNDARY/PREFERRED_STACK_BOUNDARY for Darwin/x86.

gcc/

2010-09-07  H.J. Lu  <hjl.tools@gmail.com>
	    Jack Howarth <howarth@bromo.med.uc.edu>

	PR target/36502
	PR target/42313
	PR target/44651
	* gcc/config/i386/darwin.h (STACK_BOUNDARY): Redefine as 128 for
	profiling or 64-bit MS_ABI and as BITS_PER_WORD otherwise.
	(PREFERRED_STACK_BOUNDARY): Replace STACK_BOUNDARY with 128 in
	MAX macro.

gcc/testsuite/

2010-09-07  Jack Howarth <howarth@bromo.med.uc.edu>

	PR target/36502
	* gcc.target/i386/pr36502.c: New test.

	PR target/42313
	PR target/44651
	* gcc.target/i386/builtin-unreachable.c: Don't skip on darwin.
	* gcc/testsuite/gcc.dg/stack-usage-1.c: Use default on i386/Darwin.

From-SVN: r163971

gcc/ChangeLog

+2010-09-07  H.J. Lu  <hjl.tools@gmail.com>
+	    Jack Howarth <howarth@bromo.med.uc.edu>
+
+	PR target/36502
+	PR target/42313
+	PR target/44651
+	* gcc/config/i386/darwin.h (STACK_BOUNDARY): Redefine as 128 for
+	profiling or 64-bit MS_ABI and as BITS_PER_WORD otherwise.
+	(PREFERRED_STACK_BOUNDARY): Replace STACK_BOUNDARY with 128 in
+	MAX macro.
+
 2010-09-07  H.J. Lu  <hongjiu.lu@intel.com>
 
 	* unwind-dw2-fde-glibc.c: Include <elf.h> for DT_CONFIG.

gcc/config/i386/darwin.h

@@ -79,7 +79,9 @@ extern int darwin_emit_branch_islands;
    Failure to ensure this will lead to a crash in the system libraries
    or dynamic loader.  */
 #undef STACK_BOUNDARY
-#define STACK_BOUNDARY 128
+#define STACK_BOUNDARY \
+ ((profile_flag || (TARGET_64BIT && ix86_abi == MS_ABI)) \
+  ? 128 : BITS_PER_WORD)
 
 #undef MAIN_STACK_BOUNDARY
 #define MAIN_STACK_BOUNDARY 128
@@ -91,7 +93,7 @@ extern int darwin_emit_branch_islands;
    it's below the minimum.  */
 #undef PREFERRED_STACK_BOUNDARY
 #define PREFERRED_STACK_BOUNDARY			\
-  MAX (STACK_BOUNDARY, ix86_preferred_stack_boundary)
+  MAX (128, ix86_preferred_stack_boundary)
 
 /* We want -fPIC by default, unless we're using -static to compile for
    the kernel or some such.  */

gcc/testsuite/ChangeLog

+2010-09-07  Jack Howarth <howarth@bromo.med.uc.edu>
+
+	PR target/36502
+	* gcc.target/i386/pr36502.c: New test.
+
+	PR target/42313
+	PR target/44651
+	* gcc.target/i386/builtin-unreachable.c: Don't skip on darwin.
+	* gcc/testsuite/gcc.dg/stack-usage-1.c: Use default on i386/Darwin.
+
 2010-09-07  Mikael Morin  <mikael@gcc.gnu.org>
 
 	* gfortran.dg/achar_4.f90: Enable bounds checking.

gcc/testsuite/gcc.dg/stack-usage-1.c

@@ -8,11 +8,7 @@
    Then check that this is the actual stack usage in the assembly file.  */
 
 #if defined(__i386__)
-#  if defined (__MACH__)
-#    define SIZE 232
-#  else
-#    define SIZE 248
-#  endif
+#  define SIZE 248
 #elif defined(__x86_64__)
 #  define SIZE 356
 #elif defined (__sparc__)

gcc/testsuite/gcc.target/i386/builtin-unreachable.c

@@ -9,5 +9,5 @@ int h (char *p)
     __builtin_unreachable ();
   return p ? 1 : 0;
 }
-/* { dg-final { scan-assembler-not "%e\[bs\]p" { target { ! *-*-darwin* } } } } */
+/* { dg-final { scan-assembler-not "%e\[bs\]p" } } */
 /* { dg-final { scan-assembler-not "\[\\t \]+j" } } */

gcc/testsuite/gcc.target/i386/pr36502.c

+/* PR target/36502 */
+/* { dg-do compile { target { *-*-darwin* && ilp32 } } } */
+/* { dg-options "-O -fomit-frame-pointer -fno-pic -S" } */
+int a;
+void f() {a++;}
+/* { dg-final { scan-assembler-not "esp" } } */
+