[Bug tree-optimization/107647] [12/13 Regression] GCC 12.2.0 may produce FMAs even with -ffp-contract=off

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107647

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Blocks|                            |53947
            Summary|GCC 12.2.0 may produce FMAs |[12/13 Regression] GCC
                   |even with -ffp-contract=off |12.2.0 may produce FMAs
                   |                            |even with -ffp-contract=off
   Target Milestone|---                         |12.3
           Keywords|                            |wrong-code
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2022-11-11

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Confirmed.

It is SLP that is doing it.
At -O3 even GCC 11 is working ok.


Referenced Bugs:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53947
[Bug 53947] [meta-bug] vectorizer missed-optimizations