testsuite: robustify gcc.target/m68k/20100512-1.c

[Andreas Schwab]

This has been failing since r5-2883-g8cb65b3725f0c3 which caused the
memset to be optimized out.  Add an unoptimizable reference to the local
variable to keep it.

Committed.

        * gcc.target/m68k/20100512-1.c (doTest1, doTest2): Add asm that
        references foo.
---
 gcc/testsuite/gcc.target/m68k/20100512-1.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/gcc/testsuite/gcc.target/m68k/20100512-1.c 
b/gcc/testsuite/gcc.target/m68k/20100512-1.c
index d07bb519abc..ab54a92e965 100644
--- a/gcc/testsuite/gcc.target/m68k/20100512-1.c
+++ b/gcc/testsuite/gcc.target/m68k/20100512-1.c
@@ -9,8 +9,10 @@
 void doTest1(void) {
   volatile char foo[10];
   memset((void *)foo, 1, 100);
+  asm volatile("# %0" : : "g"(foo));
 }
 void doTest2(void) {
   volatile char foo[10];
   memset((void *)foo, 1, 100);
+  asm volatile("# %0" : : "g"(foo));
 }
-- 
2.47.0


-- 
Andreas Schwab, SUSE Labs, sch...@suse.de
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