diff options
Diffstat (limited to 'gcc/testsuite/gcc.dg/tree-ssa/alias-2.c')
| -rw-r--r-- | gcc/testsuite/gcc.dg/tree-ssa/alias-2.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/alias-2.c b/gcc/testsuite/gcc.dg/tree-ssa/alias-2.c new file mode 100644 index 000000000..ecd0fdc9f --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/alias-2.c @@ -0,0 +1,28 @@ +/* { dg-do compile { target { nonpic } } } */ +/* { dg-options "-O2 -fdump-tree-optimized" } */ +static int a; +int f; +void bar (void) __attribute__((noinline)); +void bar (void) +{ + f = 9; +} + +void link_error (); + +int foo() +{ + int b, c; + a = 5; + b = a; + bar (); + b = b + a; + if (b != 10) + link_error (); + return b; +} + +/* We should have removed the link_error on the tree level as GCC can tell that + a is not touched by the calling bar at all. */ +/* { dg-final { scan-tree-dump-times "link_error" 0 "optimized"} } */ +/* { dg-final { cleanup-tree-dump "optimized" } } */ |