https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106471
Richard Biener changed:
What|Removed |Added
Target||x86_64-*-*
Keywords|
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106471
--- Comment #6 from Linus Torvalds ---
Ahh, crossed comments.
(In reply to Andrew Pinski from comment #3)
> The xor is due to X86_TUNE_AVOID_FALSE_DEP_FOR_BMI setting:
>
> /* X86_TUNE_AVOID_FALSE_DEP_FOR_BMI: Avoid false dependency
>for bi
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106471
--- Comment #5 from Linus Torvalds ---
(In reply to Andrew Pinski from comment #2)
> The xor is needed because of an errata in some Intel cores.
The only errata I'm aware of is that tzcnt can act as tzcnt even when cpuid
doesn't enumerate it (s
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106471
--- Comment #4 from Andrew Pinski ---
https://gcc.gnu.org/pipermail/gcc-patches/2022-July/598930.html
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106471
--- Comment #3 from Andrew Pinski ---
The xor is due to X86_TUNE_AVOID_FALSE_DEP_FOR_BMI setting:
/* X86_TUNE_AVOID_FALSE_DEP_FOR_BMI: Avoid false dependency
for bit-manipulation instructions. */
DEF_TUNE (X86_TUNE_AVOID_FALSE_DEP_FOR_BMI,
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106471
Andrew Pinski changed:
What|Removed |Added
Component|c |target
--- Comment #2 from Andrew Pinsk
