[Bug middle-end/68542] New: [6 Regression] 10% 481.wrf performance regression

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68542

            Bug ID: 68542
           Summary: [6 Regression] 10% 481.wrf performance regression
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Keywords: missed-optimization
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: rguenth at gcc dot gnu.org
  Target Milestone: ---
            Target: x86_64-*-*

We have two recent performance regressions on corei-avx2, the first with
-Ofast -march=native between r230066 (last good) and r230138 (first bad)
and the second with -flto added between r230277 (last good) and r230367 (first
bad).

http://gcc.opensuse.org/SPEC/CFP/sb-czerny-head-64-2006/recent.html