[Bug target/84201] 549.fotonik3d_r from SPEC2017 fails verification with -mprefer-vector-width=256 or 512 on Zen

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84201

Martin Liška <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2018-09-09
                 CC|                            |marxin at gcc dot gnu.org
     Ever confirmed|0                           |1
      Known to fail|                            |6.4.0, 7.3.0, 8.2.0, 9.0

--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Same happens on an Intel machine with -march=skylake. The issue is as old as
the skylake option (GCC 6.1+), bisection will not help us here. I can reproduce
that on a Haswell machine with the march option.