[Bug middle-end/67438] [6 Regression] ~X op ~Y pattern relocation causes loop performance degradation on 32bit x86
pinskia at gcc dot gnu.org
gcc-bugzilla@gcc.gnu.org
Wed Sep 2 17:48:00 GMT 2015
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67438
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target|i686 |i?86-*-*
Summary|[6 Regression] ~X op ~Y |[6 Regression] ~X op ~Y
|pattern relocation causes |pattern relocation causes
|loop performance |loop performance
|degradation |degradation on 32bit x86
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I bet this code is slightly faster on a machine with some extra registers like
even x86_64 or aarch64 or PowerPC or MIPS.
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