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From: "hubicka at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/101909] New: 73% regression on tfft benchmark for
 -O2 -ftree-loop-vectorize compared to -O2 on zen hardware
Date: Sat, 14 Aug 2021 14:29:52 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D101909

            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_da=
ys=3D14&older_in_days=3D0&all_changes=3Don&min_percentage_change=3D0.001&re=
visions=3De54acea9e5a821448af97c66e94a1e4c4f977d5d%2Ce87209a1269622017bf3d9=
8bf71502dcb0f893aa%2C73474527aaa24d9236aca074c5494a07f40ce058&include_user_=
branches=3Don

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