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From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/111957] `a ? abs(a) : 0` is not simplified to
 just abs(a)
Date: Thu, 26 Oct 2023 18:58:11 +0000
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X-Bugzilla-Component: tree-optimization
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X-Bugzilla-Keywords: missed-optimization, patch
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D111957

--- Comment #5 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The trunk branch has been updated by Andrew Pinski <pinskia@gcc.gnu.org>:

https://gcc.gnu.org/g:662655e22dddf5392d9aa67fce45beee980e5454

commit r14-4955-g662655e22dddf5392d9aa67fce45beee980e5454
Author: Andrew Pinski <pinskia@gmail.com>
Date:   Tue Oct 24 23:13:18 2023 +0000

    match: Simplify `a !=3D C1 ? abs(a) : C2` when C2 =3D=3D abs(C1) [PR111=
957]

    This adds a match pattern for `a !=3D C1 ? abs(a) : C2` which gets simp=
lified
    to `abs(a)`. if C1 was originally *_MIN then change it over to use absu
instead
    of abs.

    Bootstrapped and tested on x86_64-linux-gnu with no regressions.

            PR tree-optimization/111957

    gcc/ChangeLog:

            * match.pd (`a !=3D C1 ? abs(a) : C2`): New pattern.

    gcc/testsuite/ChangeLog:

            * gcc.dg/tree-ssa/phi-opt-40.c: New test.=