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| author | Richard Biener <rguenther@suse.de> | 2014-05-19 14:33:31 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2014-05-19 14:33:31 +0000 |
| commit | 1d44def2c2faae5f7e5a58fb57e0c9991a339bd5 (patch) | |
| tree | e67c419dec0c9e20aaf8ed809ff91af44ab50f25 /gcc/tree-ssa-pre.c | |
| parent | 051351362bfe8552549443b77bdbd0ac5e003eac (diff) | |
| download | gcc-1d44def2c2faae5f7e5a58fb57e0c9991a339bd5.zip gcc-1d44def2c2faae5f7e5a58fb57e0c9991a339bd5.tar.gz gcc-1d44def2c2faae5f7e5a58fb57e0c9991a339bd5.tar.bz2 | |
re PR tree-optimization/61221 (ICE on valid code at -O1 and above on x86_64-linux-gnu)
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.
From-SVN: r210614
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 f634f5e..e487d28 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); |