[Bug middle-end/101909] New: 73% regression on tfft benchmark for -O2 -ftree-loop-vectorize compared to -O2 on zen hardware

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101909

            Bug ID: 101909
           Summary: 73% regression on tfft benchmark for -O2
                    -ftree-loop-vectorize compared to -O2 on zen hardware
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: hubicka at gcc dot gnu.org
  Target Milestone: ---

https://lnt.opensuse.org/db_default/v4/CPP/latest_runs_report?younger_in_days=14&older_in_days=0&all_changes=on&min_percentage_change=0.001&revisions=e54acea9e5a821448af97c66e94a1e4c4f977d5d%2Ce87209a1269622017bf3d98bf71502dcb0f893aa%2C73474527aaa24d9236aca074c5494a07f40ce058&include_user_branches=on

This regression seems to be limited to zenith tester and does not reproduce on
benzen