[Bug tree-optimization/106293] [13 Regression] 456.hmmer at -Ofast -march=native regressed by 19% on zen2 and zen3 in July 2022

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106293

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |13.0
   Last reconfirmed|                            |2022-07-14
           Keywords|                            |missed-optimization
           Assignee|unassigned at gcc dot gnu.org      |rguenth at gcc dot 
gnu.org
            Version|12.0                        |13.0
             Status|UNCONFIRMED                 |ASSIGNED
     Ever confirmed|0                           |1
            Summary|456.hmmer at -Ofast         |[13 Regression] 456.hmmer
                   |-march=native regressed by  |at -Ofast -march=native
                   |19% on zen2 and zen3 in     |regressed by 19% on zen2
                   |July 2022                   |and zen3 in July 2022

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
I will have a look - the change should not have resulted in (major) code
generation changes.  Some effects result in slightly different CFG in some
cases (somewhat mitigated with r13-1503-gc3d2600cfb476e which I will
cherry-pick for investigating).