[testcase] Fix PR35907, vmx regs trashed

[Jakub Jelinek]

Hi!

On Wed, Apr 16, 2008 at 08:21:04PM -0400, David Edelsohn wrote:
> 	The patch is fine.  Thanks for detangling this!

The patch was committed without a testcase, is this ok for trunk/4.3?
Regtested on both:

2008-04-17  Jakub Jelinek  <jakub@redhat.com>
	    Peter Bergner  <bergner@vnet.ibm.com>

	PR target/35907
	* gcc.target/powerpc/pr35907.c: New test.

--- gcc/testsuite/gcc.target/powerpc/pr35907.c.jj	2008-04-16 10:04:23.000000000 +0200
+++ gcc/testsuite/gcc.target/powerpc/pr35907.c	2008-04-16 10:04:58.000000000 +0200
@@ -0,0 +1,59 @@
+/* PR target/35907 */
+/* { dg-do run { target powerpc*-*-* } } */
+/* { dg-require-effective-target powerpc_altivec_ok } */
+/* { dg-options "-O2 -maltivec" } */
+
+#include "altivec_check.h"
+
+#define vector __attribute__((vector_size (16)))
+union
+{
+  vector int k;
+  int c[16];
+} u, v, w;
+vector int m;
+
+void __attribute__((noinline))
+bar (void *i, vector int j)
+{
+  asm volatile ("" : : "r" (i), "r" (&j) : "memory");
+}
+
+int __attribute__((noinline))
+foo (int i, vector int j)
+{
+  char *p = __builtin_alloca (64 + i);
+  m += u.k;
+  v.k = m;
+  w.k = j;
+  if (__builtin_memcmp (&v.c, &w.c, 16) != 0)
+    __builtin_abort ();
+  j += u.k;
+  bar (p, j);
+  j += u.k;
+  bar (p, j);
+  return 0;
+}
+
+void
+test (void)
+{
+  vector int l;
+  int i;
+  for (i = 0; i < 4; i++)
+    u.c[i] = i;
+  l = u.k;
+  if (foo (64, l))
+    __builtin_abort ();
+  l += u.k;
+  if (foo (64, l))
+    __builtin_abort ();
+}
+
+int
+main ()
+{
+  altivec_check ();
+  test ();
+  return 0;
+}


	Jakub