[Bug tree-optimization/92584] New: A 454.calculix optimization opportunity

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92584

            Bug ID: 92584
           Summary: A 454.calculix optimization opportunity
           Product: gcc
           Version: 10.0
            Status: UNCONFIRMED
          Keywords: missed-optimization
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
                CC: rguenth at gcc dot gnu.org
  Target Milestone: ---

Richi, I noticed the following graph:
https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=8.170.0

I noticed that the speed drop back on the trunk happened since r278281.
Would you be interested in what loop optimization made the difference?