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[Bug tree-optimization/53346] [4.6/4.7/4.8 Regression] Bad vectorization in the proc cptrf2 of rnflow.f90
- From: "ubizjak at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Fri, 18 May 2012 16:07:45 +0000
- Subject: [Bug tree-optimization/53346] [4.6/4.7/4.8 Regression] Bad vectorization in the proc cptrf2 of rnflow.f90
- Auto-submitted: auto-generated
- References: <bug-53346-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53346
--- Comment #12 from Uros Bizjak <ubizjak at gmail dot com> 2012-05-18 16:07:45 UTC ---
(In reply to comment #11)
> You are right. -ftree-vectorize implies -ftree-loop-if-convert and this option
> makes all the difference!
>
> -O2 -ftree-vectorize:
>
> real 0m24.061s
> user 0m23.789s
> sys 0m0.225s
>
> -O2 -ftree-vectorize -fno-tree-loop-if-convert
>
> real 0m18.029s
> user 0m17.761s
> sys 0m0.220s
-O2 -ftree-loop-if-convert:
real 0m24.034s
user 0m23.770s
sys 0m0.218s
-O2
real 0m18.163s
user 0m17.892s
sys 0m0.233s