[Bug target/110758] [14 Regression] 8% hmmer regression on zen1/3 with -Ofast -march=native -flto between g:8377cf1bf41a0a9d (2023-07-05 01:46) and g:3a61ca1b9256535e (2023-07-06 16:56); g:d76d19c9bc5ef113 (2023-07-16 00:16) and g:a5088dc3f5ef73c8 (2023-07-17 03:24)

[hubicka at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110758

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2023-07-26
             Status|UNCONFIRMED                 |NEW
     Ever confirmed|0                           |1

--- Comment #3 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Regression between  
  g:d76d19c9bc5ef113 (2023-07-16 00:16) and 
  g:a5088dc3f5ef73c8 (2023-07-17 03:24)  
seems to be gone. 


The range is:
  1c6231c05bdccab3 (2023-07-21 03:06) and
  f33fdf9e7c038639 (2023-07-23 00:17)

Looking at the patches in range, it is likely the flat profile detection in 
vectorizer:

Author: Jan Hubicka <j...@suse.cz>
Date:   Fri Jul 21 19:38:26 2023 +0200

    Avoid scaling flat loop profiles of vectorized loops