i386.c (ix86_function_arg_regno_p): Never return true for 64-bit mode only SSE…

i386.c (ix86_function_arg_regno_p): Never return true for 64-bit mode only SSE registers in 32-bit mode.

	* config/i386/i386.c (ix86_function_arg_regno_p): Never return
	true for 64-bit mode only SSE registers in 32-bit mode.

	* gcc.dg/20020218-1.c: New test.

From-SVN: r49046

gcc/ChangeLog

+2002-01-21  Jakub Jelinek  <jakub@redhat.com>
+
+	* config/i386/i386.c (ix86_function_arg_regno_p): Never return
+	true for 64-bit mode only SSE registers in 32-bit mode.
+
 2002-01-21  Kazu Hirata  <kazu@hxi.com>
 
 	* unwind-dw2.c: Fix formatting.

gcc/config/i386/i386.c

@@ -1483,7 +1483,8 @@ ix86_function_arg_regno_p (regno)
 {
   int i;
   if (!TARGET_64BIT)
-    return regno < REGPARM_MAX || (TARGET_SSE && SSE_REGNO_P (regno));
+    return (regno < REGPARM_MAX
+	    || (TARGET_SSE && SSE_REGNO_P (regno) && !fixed_regs[regno]));
   if (SSE_REGNO_P (regno) && TARGET_SSE)
     return true;
   /* RAX is used as hidden argument to va_arg functions.  */

gcc/testsuite/ChangeLog

+2002-01-21  Jakub Jelinek  <jakub@redhat.com>
+
+	* gcc.dg/20020218-1.c: New test.
+
 2002-01-21  David.Billinghurst <David.Billinghurst@riotinto.com>
 
 	* lib/prune.exp (prune_gcc_output): Prune "At global scope"

gcc/testsuite/gcc.dg/20020218-1.c

+/* Verify that X86-64 only SSE registers aren't restored on IA-32.  */
+/* { dg-do compile { target i?86-*-* } } */
+/* { dg-options "-O2 -msse" } */
+/* { dg-final { scan-assembler-not "xmm8" } } */
+
+extern void abort (void);
+extern void exit (int);
+
+void *bar (void *p, void *q)
+{
+  if (p != (void *) 26 || q != (void *) 35)
+    abort ();
+  return (void *) 76;
+}
+
+void *foo (void **args)
+{
+  void *argcookie = &args[1];
+
+  __builtin_return (__builtin_apply (args[0], &argcookie,
+				     2 * sizeof (void *)));
+}
+
+int main (void)
+{
+  void *args[3];
+
+  args[0] = (void *) bar;
+  args[1] = (void *) 26;
+  args[2] = (void *) 35;
+  if (foo (args) != (void *) 76)
+    abort ();
+  exit (0);
+}