diff options
Diffstat (limited to 'gcc/testsuite/gcc.dg/tree-ssa/20040517-1.c')
| -rw-r--r-- | gcc/testsuite/gcc.dg/tree-ssa/20040517-1.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/20040517-1.c b/gcc/testsuite/gcc.dg/tree-ssa/20040517-1.c new file mode 100644 index 000000000..99b27ce02 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/20040517-1.c @@ -0,0 +1,21 @@ +/* { dg-do compile } */ +/* { dg-options "-O1 -fdump-tree-alias-vops" } */ +extern void abort (void); +int a; + +extern void __attribute__ ((malloc)) *foo (); + +void bar (void) +{ + a = 1; + foo (); + if (a) + abort (); +} + +/* We used to treat malloc functions like pure and const functions, but + malloc functions may clobber global memory. Only the function result + does not alias any other pointer. + Hence, we must have a VDEF for a before and after the call to foo(). */ +/* { dg-final { scan-tree-dump-times "VDEF" 2 "alias"} } */ +/* { dg-final { cleanup-tree-dump "alias" } } */ |