https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101821
--- Comment #9 from Jeremy R. ---
Thank you for the resources and for your insight, it's much appreciated.
Is there interest in updating the intentional false-dependency logic to not
fire for architectures newer than cannonlake?
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101821
--- Comment #8 from Andrew Pinski ---
(In reply to Jeremy R. from comment #7)
> Does the false dependency still apply to modern CPUs?
How modern is modern?
Skylake fixed this for lzcnt and tzcnt.
Cannon Lake (and Ice Lake) fixed this for
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101821
--- Comment #7 from Jeremy R. ---
Does the false dependency still apply to modern CPUs?
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101821
--- Comment #6 from Jeremy R. ---
Ah thank you @Andrew Pinski @Jakub Jelinek
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101821
Andrew Pinski changed:
What|Removed |Added
See Also||https://gcc.gnu.org/bugzill
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101821
--- Comment #4 from Jakub Jelinek ---
That is not unnecessary nor redundant, but fully intentional.
See e.g. PR62011.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101821
Andrew Pinski changed:
What|Removed |Added
Component|tree-optimization |target
Summary|Redundant
