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Subject: [Bug tree-optimization/54717] [4.8 Regression] Runtime regression: polyhedron test "rnflow" degraded
Date: Thu, 15 Nov 2012 15:07:00 -0000
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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'.