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[Bug tree-optimization/68599] [6 Regression] gcc.dg/tree-ssa/pr45122.c and tree-vrp.c
- From: "law at redhat dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Tue, 01 Dec 2015 20:42:10 +0000
- Subject: [Bug tree-optimization/68599] [6 Regression] gcc.dg/tree-ssa/pr45122.c and tree-vrp.c
- Auto-submitted: auto-generated
- References: <bug-68599-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68599
--- Comment #3 from Jeffrey A. Law <law at redhat dot com> ---
Yea, this is a latent issue in the RTL loop optimizer. Essentially
-funsafe-loop-optimizations is getting too aggressive. We've essentially got
the same situation in RTL-land as we had in tree land for pr45122.
I'm looking at a similar solution, namely limiting aggressiveness when the loop
has multiple exits.