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From: "hubicka at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/103592] New: fatigue2 benchmarks on zen runs
 43% faster with -fno-tree-vectorize -fno-tree-slp-vectorize
Date: Mon, 06 Dec 2021 21:02:25 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D103592

            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 t=
hat
on zen hardware I get:
 - 0m33s runtime for fatigue2 benchmark (from phoronix) when built with -Of=
ast
-march=3Dnative -fno-slp-vectorize -fno-tree-vectorize
 - 0m57s for -Ofast -march=3Dnative binary=