[Bug target/110758] New: 8% hmmer regression on zen1 and zen3 with -Ofast -march=native -flto between g:8377cf1bf41a0a9d (2023-07-05 01:46) and g:3a61ca1b9256535e (2023-07-06 16:56) and 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

            Bug ID: 110758
           Summary: 8% hmmer regression on zen1 and zen3 with -Ofast
                    -march=native -flto between g:8377cf1bf41a0a9d
                    (2023-07-05 01:46) and g:3a61ca1b9256535e (2023-07-06
                    16:56) and g:d76d19c9bc5ef113 (2023-07-16 00:16) and
                    g:a5088dc3f5ef73c8 (2023-07-17 03:24)
           Product: gcc
           Version: 13.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: hubicka at gcc dot gnu.org
  Target Milestone: ---

https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=476.180.0
the earlier jump looks like random code layout change.
Later jump is also seen with PGO
https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=474.180.0
and -O2
https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=469.180.0

zen1 machine
https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=289.180.0