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From: "pheeck at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/114269] [14 Regression] Multiple 3-6% exec
 time regressions of 434.zeusmp since r14-9193-ga0b1798042d033
Date: Tue, 12 Mar 2024 12:48:35 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: tree-optimization
X-Bugzilla-Version: 14.0
X-Bugzilla-Keywords: missed-optimization
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X-Bugzilla-Who: pheeck at gcc dot gnu.org
X-Bugzilla-Status: REOPENED
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D114269

Filip Kastl <pheeck at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|FIXED                       |---
             Status|RESOLVED                    |REOPENED
            Summary|[14 Regression] Multiple    |[14 Regression] Multiple
                   |3-27% exec time regressions |3-6% exec time regressions
                   |of 434.zeusmp since         |of 434.zeusmp since
                   |r14-9193-ga0b1798042d033    |r14-9193-ga0b1798042d033

--- Comment #7 from Filip Kastl <pheeck at gcc dot gnu.org> ---
Nice, our LNT instance already shows that the patch sped up 434.zeusmp. How=
ever
I'd like to reopen this bug since the benchmark didn't return to its origin=
al
values. At least some configurations are still slower than before
r14-9193-ga0b1798042d033:

Intel Skylake -Ofast -march=3Dnative (~5% regression)
https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=3D798.80.0

Intel Skylake -Ofast -march=3Dnative -flto PGO (~5% regression)
https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=3D785.80.0

AMD Zen3 -Ofast -march=3Dnative -flto (~6% regression)
https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=3D476.80.0

AMD Zen3 -Ofast -march=3Dnative -flto PGO (~4% regression)
https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=3D474.80.0

AMD Zen2 -Ofast -march=3Dnative -flto (~3% regression)
https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=3D289.80.0=