diff options
| author | rguenth <rguenth@138bc75d-0d04-0410-961f-82ee72b054a4> | 2014-05-19 14:33:31 +0000 |
|---|---|---|
| committer | rguenth <rguenth@138bc75d-0d04-0410-961f-82ee72b054a4> | 2014-05-19 14:33:31 +0000 |
| commit | 22499a394f2e3f244a0a32fbe40e10ad5dc984d8 (patch) | |
| tree | e67c419dec0c9e20aaf8ed809ff91af44ab50f25 /gcc/tree-ssa-pre.c | |
| parent | 85ba79cb538bd4e640dd9e8d855c02b609281c75 (diff) | |
| download | gcc-22499a394f2e3f244a0a32fbe40e10ad5dc984d8.tar.gz | |
2014-05-19 Richard Biener <rguenther@suse.de>
PR tree-optimization/61221
* tree-ssa-pre.c (eliminate_dom_walker::before_dom_children):
Do nothing for unreachable blocks.
* tree-ssa-sccvn.c (cond_dom_walker::before_dom_children):
Improve unreachability detection.
* gcc.dg/torture/pr61221.c: New testcase.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@210614 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/tree-ssa-pre.c')
| -rw-r--r-- | gcc/tree-ssa-pre.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/gcc/tree-ssa-pre.c b/gcc/tree-ssa-pre.c index f634f5efd29..e487d283c28 100644 --- a/gcc/tree-ssa-pre.c +++ b/gcc/tree-ssa-pre.c @@ -4010,6 +4010,15 @@ eliminate_dom_walker::before_dom_children (basic_block b) /* Mark new bb. */ el_avail_stack.safe_push (NULL_TREE); + /* If this block is not reachable do nothing. */ + edge_iterator ei; + edge e; + FOR_EACH_EDGE (e, ei, b->preds) + if (e->flags & EDGE_EXECUTABLE) + break; + if (!e) + return; + for (gsi = gsi_start_phis (b); !gsi_end_p (gsi);) { gimple stmt, phi = gsi_stmt (gsi); |