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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/101541] New: Missing ABSU detection at gimple
Date: Tue, 20 Jul 2021 22:58:54 +0000
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X-Bugzilla-Component: tree-optimization
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D101541

            Bug ID: 101541
           Summary: Missing ABSU detection at gimple
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Keywords: missed-optimization
          Severity: enhancement
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: pinskia at gcc dot gnu.org
  Target Milestone: ---

While looking at PR 44608 and finding it was already fixed, I noticed inste=
ad
we should produce ABSU at the gimple level but don't currently.

Take:
unsigned abssat2 (int x)
{
    unsigned int y =3D x;

    if (x < 0)
        y =3D -y;

  return y;
}=