[Bug tree-optimization/91293] [8/9/10 Regression] Wrong code with -O3 -mavx2

rguenth at gcc dot gnu.org gcc-bugzilla@gcc.gnu.org
Tue Jul 30 07:05:00 GMT 2019


https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91293

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|                            |x86_64-*-*, i?86-*-*
           Priority|P3                          |P2
             Status|UNCONFIRMED                 |NEW
      Known to work|                            |7.4.0
           Keywords|                            |needs-bisection
   Last reconfirmed|                            |2019-07-30
                 CC|                            |rguenth at gcc dot gnu.org
     Ever confirmed|0                           |1
            Summary|Wrong code with -O3         |[8/9/10 Regression] Wrong
                   |-march=skylake-avx512       |code with -O3 -mavx2
   Target Milestone|---                         |8.4
      Known to fail|                            |10.0, 8.1.0, 9.1.0

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed with -O3 -mavx2.  GCC 7 seems fine.  Disabling vectorization fixes
it.


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