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| author | Richard Biener <rguenther@suse.de> | 2012-10-25 11:16:12 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2012-10-25 11:16:12 +0000 |
| commit | 9c370032cf787513298297be04ddf8b02ac2f336 (patch) | |
| tree | 8de88ebb51b852c880286c7f797faeedc6b31474 /gcc/tree-ssa-tail-merge.c | |
| parent | 3a969a32ff392ed49a60050a8b94d1dfdc05a5f3 (diff) | |
| download | gcc-9c370032cf787513298297be04ddf8b02ac2f336.zip gcc-9c370032cf787513298297be04ddf8b02ac2f336.tar.gz gcc-9c370032cf787513298297be04ddf8b02ac2f336.tar.bz2 | |
re PR target/54902 (, ICE (segfault) building on arm-linux-gnueabi)
2012-10-25 Richard Biener <rguenther@suse.de>
PR tree-optimization/54902
* tree-ssa-pre.c (fini_eliminate): Return TODO.
(do_pre): Adjust.
(execute_fre): Likewise.
* tree-ssa-tailmerge.c (tail_merge_optimize): Delete unreachable
blocks before computing dominators.
* g++.dg/torture/pr54902.C: New testcase.
From-SVN: r192804
Diffstat (limited to 'gcc/tree-ssa-tail-merge.c')
| -rw-r--r-- | gcc/tree-ssa-tail-merge.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/gcc/tree-ssa-tail-merge.c b/gcc/tree-ssa-tail-merge.c index 372096c..79fb1a6 100644 --- a/gcc/tree-ssa-tail-merge.c +++ b/gcc/tree-ssa-tail-merge.c @@ -1600,7 +1600,12 @@ tail_merge_optimize (unsigned int todo) timevar_push (TV_TREE_TAIL_MERGE); - calculate_dominance_info (CDI_DOMINATORS); + if (!dom_info_available_p (CDI_DOMINATORS)) + { + /* PRE can leave us with unreachable blocks, remove them now. */ + delete_unreachable_blocks (); + calculate_dominance_info (CDI_DOMINATORS); + } init_worklist (); while (!VEC_empty (same_succ, worklist)) |