[Bug target/112914] New: [14 Regression] ~7-9% exec time regression of 436.cactusADM on AMD Zen2

[fkastl at suse dot cz via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112914

            Bug ID: 112914
           Summary: [14 Regression] ~7-9% exec time regression of
                    436.cactusADM on AMD Zen2
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Keywords: needs-bisection
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: fkastl at suse dot cz
  Target Milestone: ---
              Host: x86_64-linux
            Target: x86_64-linux

Between commits

g:73e2bdbf9bed48b2

and

g:c6bb413eeb9d1341

there's a slowdown of 436.cactusADM 2006 SPEC. 9% regression seen on the graph
here (Zen2 machine):

https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=292.100.0

I've also replicated this on another Zen2 machine and got 7% slowdown. I
haven't seen this slowdown on other architectures.