[Bug target/101908] [12 regression] cray regression with -O2 -ftree-slp-vectorize compared to -O2

lili.cui at intel dot com gcc-bugzilla@gcc.gnu.org
Fri Feb 25 08:26:37 GMT 2022


https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101908

cuilili <lili.cui at intel dot com> changed:

           What    |Removed                     |Added
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                 CC|                            |lili.cui at intel dot com

--- Comment #23 from cuilili <lili.cui at intel dot com> ---
(In reply to Richard Biener from comment #17)
> I do wonder though how CLX is fine with such access pattern ;)  (did you test
> with just -O2?)

Actually CLX also has STLF issues, there is 13.7% regression when comparing
"gcc trunk + -O2" w/ and w/t "-fno-tree-vectorize"


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