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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: "pinskia at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Fri, 18 May 2012 17:54:16 +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 #15 from Andrew Pinski <pinskia at gcc dot gnu.org> 2012-05-18 17:54:16 UTC ---
(In reply to comment #14)
> Compile and execute slow assembly:
> real 0m18.170s
> user 0m17.907s
> sys 0m0.223s
>
> WTF happened here?!
Are conditional moves that bad on x86? The change which uses them more for
COND_EXPR was mine but really I think this was a latent bug or a way to say
chose conditional move over jumps for some targets.