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[Bug tree-optimization/54717] [4.8 Regression] Runtime regression: polyhedron test "rnflow" degraded
- From: "dominiq at lps dot ens.fr" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Thu, 15 Nov 2012 15:07:33 +0000
- Subject: [Bug tree-optimization/54717] [4.8 Regression] Runtime regression: polyhedron test "rnflow" degraded
- Auto-submitted: auto-generated
- References: <bug-54717-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54717
--- Comment #17 from Dominique d'Humieres <dominiq at lps dot ens.fr> 2012-11-15 15:07:33 UTC ---
> Is the slowdown still reproducing with my patch?
Most of it (if not all) is gone with the patch:
23.96s with '-fprotect-parens -Ofast -funroll-loops -ftree-loop-linear
-fomit-frame-pointer -fwhole-program -flto' compared to
23.37s with '-fprotect-parens -Ofast -funroll-loops -ftree-loop-linear
-fomit-frame-pointer -fwhole-program -flto -fno-tree-loop-if-convert'.