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From: "gabravier at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/95731] New: Faiilure to optimize a >= 0 && b
 >= 0 to (a | b) >= 0
Date: Wed, 17 Jun 2020 21:58:23 +0000
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: tree-optimization
X-Bugzilla-Version: 11.0
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D95731

            Bug ID: 95731
           Summary: Faiilure to optimize a >=3D 0 && b >=3D 0 to (a | b) >=
=3D 0
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gabravier at gmail dot com
  Target Milestone: ---

bool f(int a, int b)
{
    return a >=3D 0 && b >=3D 0;
}

This can be optimized to `return (a | b) >=3D 0;`. LLVM does this transform=
ation,
but GCC does not.=