[Bug tree-optimization/107499] [13 Regression] 433.milc regressed by 6-8% on zen3 at -O2 -flto

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107499

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Version|12.0                        |13.0
           Keywords|                            |missed-optimization
   Target Milestone|---                         |13.0
   Last reconfirmed|                            |2022-11-05
             Status|UNCONFIRMED                 |ASSIGNED
     Ever confirmed|0                           |1
           Assignee|unassigned at gcc dot gnu.org      |rguenth at gcc dot gnu.org
            Summary|433.milc regressed by 6-8%  |[13 Regression] 433.milc
                   |on zen3 at -O2 -flto        |regressed by 6-8% on zen3
                   |                            |at -O2 -flto

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
It should be possible to constrain the "fix" to niter analysis, it also affects
IVOPTs which might be the issue here.  I'll investigate during stage3.