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[Bug tree-optimization/46316] [4.6 regression] incorrect loop optimization
- From: "ebotcazou at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Sat, 6 Nov 2010 10:05:22 +0000
- Subject: [Bug tree-optimization/46316] [4.6 regression] incorrect loop optimization
- Auto-submitted: auto-generated
- References: <bug-46316-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46316
--- Comment #6 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2010-11-06 10:05:21 UTC ---
> It is very likely caused by revision 166280:
>
> http://gcc.gnu.org/ml/gcc-cvs/2010-11/msg00166.html
Indeed, this apparently exposed a bug in the scalar evolution analysis invoked
during the 2nd VRP pass. This stuff always causes me headaches. :-)