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| author | Richard Biener <rguenther@suse.de> | 2018-09-03 17:41:05 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2018-09-03 17:41:05 +0000 |
| commit | a5e8b0607431fdefa0dba2bcf477a1695ac5d227 (patch) | |
| tree | 2b777ff2b25afd681d5c2ffce8b038862e57a893 /gcc/tree-ssa-sccvn.c | |
| parent | 64979e04afabef10adfce819b9955dd8ae6c2fbe (diff) | |
| download | gcc-a5e8b0607431fdefa0dba2bcf477a1695ac5d227.zip gcc-a5e8b0607431fdefa0dba2bcf477a1695ac5d227.tar.gz gcc-a5e8b0607431fdefa0dba2bcf477a1695ac5d227.tar.bz2 | |
re PR tree-optimization/87177 (wrong code at -O2 and -O3 on x86-64-linux-gnu)
2018-09-03 Richard Biener <rguenther@suse.de>
PR tree-optimization/87177
* tree-ssa-sccvn.c (vuse_ssa_val): Revert previous change, keep
cleanup.
* gcc.dg/torture/pr87177.c: New testcase.
* gcc.dg/torture/pr87177-2.c: Likewise.
From-SVN: r264069
Diffstat (limited to 'gcc/tree-ssa-sccvn.c')
| -rw-r--r-- | gcc/tree-ssa-sccvn.c | 12 |
1 files changed, 2 insertions, 10 deletions
diff --git a/gcc/tree-ssa-sccvn.c b/gcc/tree-ssa-sccvn.c index 1f00335..34c193b 100644 --- a/gcc/tree-ssa-sccvn.c +++ b/gcc/tree-ssa-sccvn.c @@ -485,16 +485,8 @@ vuse_ssa_val (tree x) do { - if (SSA_NAME_IS_DEFAULT_DEF (x)) - return x; - vn_ssa_aux_t tem - = vn_ssa_aux_hash->find_with_hash (x, SSA_NAME_VERSION (x)); - /* For region-based VN this makes walk_non_aliased_vuses stop walking - when we are about to look at a def outside of the region. */ - if (!tem || !tem->visited) - return NULL_TREE; - gcc_assert (tem->valnum != VN_TOP); - x = tem->valnum; + x = SSA_VAL (x); + gcc_assert (x != VN_TOP); } while (SSA_NAME_IN_FREE_LIST (x)); |