[Bug tree-optimization/103592] New: fatigue2 benchmarks on zen runs 43% faster with -fno-tree-vectorize -fno-tree-slp-vectorize

[hubicka at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103592

            Bug ID: 103592
           Summary: fatigue2 benchmarks on zen runs 43% faster with
                    -fno-tree-vectorize -fno-tree-slp-vectorize
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: hubicka at gcc dot gnu.org
  Target Milestone: ---

While looking into -fno-inline-functions-called-once difference I noticed that
on zen hardware I get:
 - 0m33s runtime for fatigue2 benchmark (from phoronix) when built with -Ofast
-march=native -fno-slp-vectorize -fno-tree-vectorize
 - 0m57s for -Ofast -march=native binary