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| author | Richard Biener <rguenther@suse.de> | 2016-02-15 08:42:38 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2016-02-15 08:42:38 +0000 |
| commit | 1c48bff185df422d6f9f980fd02466606be2ccd4 (patch) | |
| tree | ced0a83a15fa56f6e17922648bde552b105142be /libgcc | |
| parent | 9e074c0d6df7096f40fa0a046dfe6401c413d467 (diff) | |
| download | gcc-1c48bff185df422d6f9f980fd02466606be2ccd4.zip gcc-1c48bff185df422d6f9f980fd02466606be2ccd4.tar.gz gcc-1c48bff185df422d6f9f980fd02466606be2ccd4.tar.bz2 | |
re PR tree-optimization/69776 (Wrong optimization with aliasing)
2016-02-15 Richard Biener <rguenther@suse.de>
PR tree-optimization/69776
* tree-ssa-sccvn.h (vn_reference_lookup): Adjust prototype.
* tree-ssa-sccvn.c (vn_reference_lookup): Add parameter to
indicate whether we can use TBAA to disambiguate against stores.
Use alias-set zero if not.
(visit_reference_op_store): Do not use TBAA when looking up
redundant stores.
* tree-ssa-pre.c (compute_avail): Use TBAA here.
(eliminate_dom_walker::before_dom_children): But not when looking
up redundant stores.
* gcc.dg/torture/pr69776.c: New testcase.
From-SVN: r233418
Diffstat (limited to 'libgcc')
0 files changed, 0 insertions, 0 deletions