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[Bug tree-optimization/41879] [4.5 Regression] 172.mgrid regression, vectorizer prevents predictive commoning
- From: "rguenth at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 30 Oct 2009 17:00:45 -0000
- Subject: [Bug tree-optimization/41879] [4.5 Regression] 172.mgrid regression, vectorizer prevents predictive commoning
- References: <bug-41879-10053@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #2 from rguenth at gcc dot gnu dot org 2009-10-30 17:00 -------
With vectorization enabled I get
Running /home/richard/src/trunk/gcc/testsuite/gcc.dg/tree-ssa/tree-ssa.exp ...
FAIL: gcc.dg/tree-ssa/predcom-1.c scan-tree-dump-times pcom "looparound ref" 1
FAIL: gcc.dg/tree-ssa/predcom-4.c scan-tree-dump-times pcom "Combination" 1
FAIL: gcc.dg/tree-ssa/predcom-4.c scan-tree-dump-times pcom "Unrolling 3
times." 1
that is, all predictive commoning tests run with -O2 only...
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41879