[Bug target/82805] New: [7/8 Regression] SPEC CPU2006 454.calculix ~6% performance deviation in between 6.3 and 7.2

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82805

            Bug ID: 82805
           Summary: [7/8 Regression] SPEC CPU2006 454.calculix ~6%
                    performance deviation in between 6.3 and 7.2
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
  Target Milestone: ---

We lost about 6% on Zen with -O2 -mtune=generic in between these 2 releases.
It's quite hard to bisect a single revision.