i386.c (ix86_function_regparm): Added checking of ix86_force_align_arg_pointer…

i386.c (ix86_function_regparm): Added checking of ix86_force_align_arg_pointer to determine the number of...

	* config/i386/i386.c (ix86_function_regparm): Added checking of 
	ix86_force_align_arg_pointer to determine the number of
	register parameters.
	* gcc.target/i386/stack-realign.c: New.

From-SVN: r125173

gcc/ChangeLog

+2007-05-29  Hui-May Chang  <hm.chang@apple.com>
+	* config/i386/i386.c (ix86_function_regparm): Added checking of 
+	ix86_force_align_arg_pointer to determine the number of
+	register parameters.
+
 2007-05-29  Zdenek Dvorak  <dvorakz@suse.cz>
 
 	* tree-vectorizer.h (DR_MISALIGNMENT): Cast aux to integer.

gcc/config/i386/i386.c

@@ -2837,7 +2837,8 @@ ix86_function_regparm (tree type, tree decl)
 	  /* We can't use regparm(3) for nested functions as these use
 	     static chain pointer in third argument.  */
 	  if (local_regparm == 3
-	      && decl_function_context (decl)
+	      && (decl_function_context (decl)
+                  || ix86_force_align_arg_pointer)
 	      && !DECL_NO_STATIC_CHAIN (decl))
 	    local_regparm = 2;
 

gcc/testsuite/ChangeLog

+2007-05-29  Hui-May Chang  <hm.chang@apple.com>
+
+	* gcc.target/i386/stack-realign.c: New.
+
 2007-05-29  Zdenek Dvorak  <dvorakz@suse.cz>
 
 	* gcc.dg/tree-ssa/prefetch-6.c: New test.

gcc/testsuite/gcc.target/i386/stack-realign.c

+/* { dg-do run { target { { i?86-*-* x86_64-*-* } && ilp32 } } } */
+/* { dg-options "-mstackrealign -O2" } */
+
+extern void abort (void);
+
+__attribute__((noinline)) static void foo (int i1, int i2, int i3)
+{
+  if (i3 != 3)
+    abort ();
+}
+
+int main (int argc, char **argv)
+{
+  foo (1, 2, 3);
+  return 0;
+}