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From: "pheeck at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/114412] New: [14 Regression] 7% slowdown of
 436.cactusADM on aarch64
Date: Thu, 21 Mar 2024 09:34:44 +0000
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: target
X-Bugzilla-Version: 14.0
X-Bugzilla-Keywords: missed-optimization, needs-bisection
X-Bugzilla-Severity: normal
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X-Bugzilla-Status: UNCONFIRMED
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D114412

            Bug ID: 114412
           Summary: [14 Regression] 7% slowdown of 436.cactusADM on
                    aarch64
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Keywords: missed-optimization, needs-bisection
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: pheeck at gcc dot gnu.org
            Blocks: 26163
  Target Milestone: ---
              Host: aarch64-gnu-linux
            Target: aarch64-gnu-linux

As seen here

https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=3D586.100.0

there is a 7% execution time slowdown of the 436.cactusADM SPEC 2006 benchm=
ark
between commits

g:2d8cd712b17e88f2
g:46666b9bde5903d8

The compilation options are: -Ofast -march=3Dnative -mtune=3Dnative -flto P=
GO.

The CPU is Ampere Altra - Neoverse N1.


Referenced Bugs:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D26163
[Bug 26163] [meta-bug] missed optimization in SPEC (2k17, 2k and 2k6 and 95=
)=