[arm] Fix arm-mmx-1.c

[Paul Brook <paul at codesourcery dot com>]

The test gcc.dg/arm-mmx-1.c assumes the loop in the testcase will use/clobber 
all available registers. With tree-ssa the number of registers clobbered 
seems to be sensitive to the optimizations applied, resulting in spurious 
failures.

The patch below changes the test to use an explicit asm clobber.

Tested with cross to arm-none-elf.
Ok?

Paul

2004-05-13  Paul Brook  <paul@codesourcery.com>

	* gcc.dg/arm-mmx-1.c: Use asm to clobber registers.

Index: gcc.dg/arm-mmx-1.c
===================================================================
RCS file: /var/cvsroot/gcc-cvs/gcc/gcc/testsuite/gcc.dg/arm-mmx-1.c,v
retrieving revision 1.3
diff -u -p -r1.3 arm-mmx-1.c
--- a/gcc.dg/arm-mmx-1.c	1 Apr 2004 00:56:55 -0000	1.3
+++ b/gcc.dg/arm-mmx-1.c	13 May 2004 00:27:45 -0000
@@ -5,22 +5,15 @@
 /* { dg-final { global compiler_flags; if ![string match "*-mthumb *" 
$compiler_flags] { scan-assembler "ldmfd\[ 	]sp!.*ip,\[ ]*pc" } } } */
 
 /* This function uses all the call-saved registers, namely r4, r5, r6,
-   r7, r8, r9, sl, fp.  Since we also save pc, that leaves an odd
+   r7, r8, r9, sl, fp.  Since we also save lr, that leaves an odd
    number of registers, and the compiler will push ip to align the
    stack.  Make sure that we restore ip into ip, not into sp as is
    done when using a frame pointer.  The -mno-apcs-frame option
    permits the frame pointer to be used as an ordinary register.  */
-int
-foo(int *a, int *b, int *c, int *d, int *tot)
-{
-  int i, j, k, l, m, n, o;
 
-  *tot = 0;
-  for (i = *a; i < *b; i += *c)
-    for (j = *a; j < *b; j += *d)
-      for (k = *a; k < *c; k += *d)
-	for (l = *b; k < *c; k += *d)
-	  for (m = *d; k < *c; k += *b)
-	    *tot += i + j + k + l + m;
-  return *tot;
+void
+foo(void)
+{
+  __asm volatile ("" : : :
+		  "r4", "r5", "r6", "r7", "r8", "r9", "sl", "fp", "lr");
 }