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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/105558] simple 8-bit integer calculation fails with -O3
 / march=core-avx2 on some gfortran 8/9/10 versions
Date: Wed, 11 May 2022 07:51:38 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105558

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2022-05-11
             Status|UNCONFIRMED                 |NEW
           Keywords|                            |needs-bisection
     Ever confirmed|0                           |1

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Can I ask you to see whether -O3 -fno-tree-vectorize avoids the issue and
whether -O3 -fno-vect-cost-model makes the issue appear in more versions?  =
It
could be that this is a resolved issue that awaits backporting of a fix (or
where backporting is too difficult).

I can confirm the -O3 -march=3Dcore-avx2 failure with GCC 10 and success wi=
th GCC
11.=