[Bug fortran/90539] New: [10 Regression] 481.wrf slowdown by 25% on Intel Kaby with -Ofast -march=native starting with r271377

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90539

            Bug ID: 90539
           Summary: [10 Regression] 481.wrf slowdown by 25% on Intel Kaby
                    with -Ofast -march=native starting with r271377
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
  Target Milestone: ---

Since the revision I see a slowdown and the ELF section of the binary is about
6% bigger.

Machine:
model name      : Intel(R) Core(TM) i5-7400 CPU @ 3.00GHz

SPEC flags:
-Ofast -march=native

Note that I see similar slowdown also with -O2 (generic, no -march) on the
machine.