[Bug middle-end/111152] New: ~7-9% performance regression on 510.parest_r SPEC 2017 benchmark

[Bug middle-end/111152] New: ~7-9% performance regression on 510.parest_r SPEC 2017 benchmark

[fkastl at suse dot cz]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111152

            Bug ID: 111152
           Summary: ~7-9% performance regression on 510.parest_r SPEC 2017
                    benchmark
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Keywords: needs-bisection
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: fkastl at suse dot cz
                CC: mjambor at suse dot cz
  Target Milestone: ---

There is a performance regression of about 7-9% on the 510.parest_r SPEC 2017
benchmark.

Between g:d073e2d75d9ed492 and g:9ade70bb86c8744f

Intel Xeon Gold 5315Y, all with -Ofast native, some with lto and/or pgo
https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=801.457.0
https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=796.457.0
https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=792.457.0
https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=797.457.0

With Zen3 -O2 generic lto pgo the regression is less noticeable (only 4%)
https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=694.457.0

[Bug middle-end/111152] ~7-9% performance regression on 510.parest_r SPEC 2017 benchmark

[crazylht at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111152

Hongtao.liu <crazylht at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |crazylht at gmail dot com

--- Comment #1 from Hongtao.liu <crazylht at gmail dot com> ---
It's PR111064

[Bug middle-end/111152] ~7-9% performance regression on 510.parest_r SPEC 2017 benchmark

[crazylht at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111152

--- Comment #2 from Hongtao.liu <crazylht at gmail dot com> ---
> With Zen3 -O2 generic lto pgo the regression is less noticeable (only 4%)
> https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=694.457.0

Not sure about this part

[Bug middle-end/111152] ~7-9% performance regression on 510.parest_r SPEC 2017 benchmark

[fkastl at suse dot cz]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111152

--- Comment #3 from Filip Kastl <fkastl at suse dot cz> ---
Ah, sorry. Didn't notice I'm making a duplicate.

The Zen3 regression isn't that big and could just be noise.

[Bug middle-end/111152] ~7-9% performance regression on 510.parest_r SPEC 2017 benchmark

[fkastl at suse dot cz]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111152

Filip Kastl <fkastl at suse dot cz> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |DUPLICATE

--- Comment #4 from Filip Kastl <fkastl at suse dot cz> ---
Marking as duplicate.

*** This bug has been marked as a duplicate of bug 111064 ***