[Bug tree-optimization/53346] [4.6/4.7/4.8 Regression] Bad vectorization in the proc cptrf2 of rnflow.f90

[ubizjak at gmail dot com]

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