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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/107254] [11/12/13 Regression] Wrong
 vectorizer code (GCC 11 only, Fortran)
Date: Fri, 14 Oct 2022 07:50:15 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D107254

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[11 Regression] Wrong       |[11/12/13 Regression] Wrong
                   |vectorizer code (GCC 11     |vectorizer code (GCC 11
                   |only, Fortran)              |only, Fortran)
           Priority|P3                          |P2
      Known to work|12.1.0                      |

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Btw, the testcase still fails with -O2 -ftree-vectorize -mavx2 -mno-fma
-fno-vect-cost-model on the GCC 12 branch and trunk but works with these fl=
ags
on the GCC 10 branch.

Interestingly it doesn't fail with -mprefer-vector-width=3D128 (which doesn=
't
require versioning for aliasing).=