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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/114027] [14 Regression] RISC-V vector:
 miscompile at -O3
Date: Thu, 22 Feb 2024 09:13:22 +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
X-Bugzilla-Severity: normal
X-Bugzilla-Who: pinskia at gcc dot gnu.org
X-Bugzilla-Status: NEW
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Message-ID: <bug-114027-4-HR7AXzV0mc@http.gcc.gnu.org/bugzilla/>
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D114027

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |needs-bisection
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |NEW
   Target Milestone|---                         |14.0
            Summary|[14] RISC-V vector:         |[14 Regression] RISC-V
                   |miscompile at -O3           |vector: miscompile at -O3
          Component|target                      |tree-optimization

--- Comment #10 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Ok, now I am able to reproduce the failure:
`-O3 -fno-vect-cost-model -msse4.2` is the exact command line needed.
For some reason enabling AVX512 causes the loop not to be vectorize ...=