[Bug middle-end/110586] [14 Regression] 10% fatigue2 regression on zen since r14-2369-g3a61ca1b925653

hubicka at gcc dot gnu.org gcc-bugzilla@gcc.gnu.org
Mon Jul 17 09:02:39 GMT 2023


https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110586

Jan Hubicka <hubicka at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever confirmed|0                           |1
   Last reconfirmed|                            |2023-07-17

--- Comment #2 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Do we have other PRs reducing to this change?

The patch makes cuntroll to scale down previously incoherent profiles when loop
that does not loop is predicted to loop.
Common source of these loops are vectorized epilogues which I fixed yesterday.
With some luck this may fix fatigue.


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