[Bug tree-optimization/87546] [9 Regression] Gcc miscompiles at -O3 on valid code

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87546

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|                            |x86_64-*-*
             Status|UNCONFIRMED                 |NEW
      Known to work|                            |8.2.1
            Version|unknown                     |9.0
           Keywords|                            |wrong-code
   Last reconfirmed|                            |2018-10-08
                 CC|                            |rsandifo at gcc dot gnu.org
     Ever confirmed|0                           |1
            Summary|Gcc miscompiles at -O3 on   |[9 Regression] Gcc
                   |valid code                  |miscompiles at -O3 on valid
                   |                            |code
   Target Milestone|---                         |9.0

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.  Caused by loop vectorization (some pattern recog stuff
appearantly).