[Bug tree-optimization/88801] New: [9 Regression] Performance regression on 473.astar on aarch64

[ktkachov at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88801

            Bug ID: 88801
           Summary: [9 Regression] Performance regression on 473.astar on
                    aarch64
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Keywords: missed-optimization
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: ktkachov at gcc dot gnu.org
                CC: hubicka at gcc dot gnu.org
  Target Milestone: ---
            Target: aarch64

We've noticed a performance regression recently on 473.astar on aarch64 (a
Cortex-A57 platform).
On our systems we see about 8% slowdown and I also see a 4% slowdown (among
other similar slowdowns) at:
https://lnt.opensuse.org/db_default/v4/SPEC/1947
https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=13.260.0&highlight_run=1947

I suspect this is something to do with the recent inlining tweaks.