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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/101541] Missing ABSU detection at gimple
Date: Mon, 16 Oct 2023 17:11:33 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D101541

--- Comment #9 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:c7609acb8a8210188d21b2cd72ecc6d3b2de2ab8

commit r14-4662-gc7609acb8a8210188d21b2cd72ecc6d3b2de2ab8
Author: Andrew Pinski <pinskia@gmail.com>
Date:   Sun Oct 15 10:36:56 2023 -0700

    MATCH: Improve `A CMP 0 ? A : -A` set of patterns to use bitwise_equal_=
p.

    This improves the `A CMP 0 ? A : -A` set of match patterns to use
    bitwise_equal_p which allows an nop cast between signed and unsigned.
    This allows catching a few extra cases which were not being caught befo=
re.

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

    gcc/ChangeLog:

            PR tree-optimization/101541
            * match.pd (A CMP 0 ? A : -A): Improve
            using bitwise_equal_p.

    gcc/testsuite/ChangeLog:

            PR tree-optimization/101541
            * gcc.dg/tree-ssa/phi-opt-36.c: New test.
            * gcc.dg/tree-ssa/phi-opt-37.c: New test.=