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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/111764] [11/12/13/14 Regression] Wrong code
 at -O3 on x86_64-linux-gnu
Date: Tue, 10 Oct 2023 20:57:50 +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: needs-bisection, wrong-code
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X-Bugzilla-Target-Milestone: 11.5
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D111764

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2023-10-10
   Target Milestone|---                         |11.5
            Summary|Wrong code at -O3 on        |[11/12/13/14 Regression]
                   |x86_64-linux-gnu since      |Wrong code at -O3 on
                   |r11-5965-g04bff1bbfc1       |x86_64-linux-gnu
     Ever confirmed|0                           |1
      Known to work|                            |10.5.0
           Keywords|                            |needs-bisection
      Known to fail|                            |11.1.0, 12.1.0, 13.1.0

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Note r11-5965-g04bff1bbfc1 just exposed the issue, you can reproduce the is=
sue
before that with `-fno-vector-cost-model` added and it worked with that opt=
ion
in GCC 9.5.0 but was broken in GCC 10.1.0.


Confirmed.=