diff options
Diffstat (limited to 'gcc/testsuite/gcc.dg/tree-ssa/20041122-1.c')
| -rw-r--r-- | gcc/testsuite/gcc.dg/tree-ssa/20041122-1.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/20041122-1.c b/gcc/testsuite/gcc.dg/tree-ssa/20041122-1.c new file mode 100644 index 00000000000..89b90643e17 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/20041122-1.c @@ -0,0 +1,39 @@ +/* { dg-do compile } */ +/* { dg-options "-O1 -fdump-tree-dom3" } */ + + +typedef unsigned int size_t; +extern void *xmalloc (size_t) __attribute__ ((__malloc__)); +struct edge_def +{ + struct basic_block_def *dest; + int flags; +}; +typedef struct edge_def *edge; +struct basic_block_def +{ + int flags; +}; +typedef struct basic_block_def *basic_block; +extern int n_basic_blocks; +extern edge frob (); +void +find_unreachable_blocks (int frobit) +{ + basic_block *tos, *worklist, bb; + tos = worklist = xmalloc (sizeof (basic_block) * n_basic_blocks); + edge e = frob(); + if (!(e->dest->flags & 4)) + { + e->dest->flags |= 4; + *tos++ = e->dest; + } +} + +/* If the aliasing code does its job properly, then we should be + able to determine that modifying e->dest->flags does not + modify e or e->dest. The net result is that we only need one + load of e->dest. */ +/* { dg-final { scan-tree-dump-times "->dest" 1 "dom3" { xfail *-*-* } } } */ + + |