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Subject: [Bug tree-optimization/96779] Failure to optimize comparison of
 negative version of self
Date: Tue, 23 Nov 2021 00:48:16 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D96779

--- Comment #6 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jeff Law <law@gcc.gnu.org>:

https://gcc.gnu.org/g:e888bea2384a0d8d29a6545c4f57f41cb49df0a6

commit r12-5458-ge888bea2384a0d8d29a6545c4f57f41cb49df0a6
Author: Navid Rahimi <navidrahimi@microsoft.com>
Date:   Mon Nov 22 19:46:17 2021 -0500

    Re: [PATCH] PR tree-optimization/96779 Adding a missing pattern to matc=
h.pd

            PR tree-optimization/96779
    gcc/
            * match.pd (-x =3D=3D x) -> (x =3D=3D 0): New optimization.

    gcc/testsuite
            * gcc.dg/tree-ssa/pr96779.c: Testcase for this optimization.
            * gcc.dg/tree-ssa/pr96779-disabled.c: Testcase for this
optimization
            when -fwrapv passed.=