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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 middle-end/110726] [14 Regression] wrong code on llvm-16 around
 'a |= a == 0'
Date: Wed, 19 Jul 2023 16:16:29 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D110726

--- Comment #11 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:bf20b770d9aabb15faf2644b5e3106249cb175f3

commit r14-2648-gbf20b770d9aabb15faf2644b5e3106249cb175f3
Author: Andrew Pinski <apinski@marvell.com>
Date:   Tue Jul 18 21:11:46 2023 +0000

    Fix PR110726: a | (a =3D=3D b) can sometimes produce wrong code

    So I had missed/forgot that EQ_EXPR could have an non boolean
    type for generic when I implemented r14-2556-g0407ae8a7732d9.
    This patch adds check for one bit precision intergal type
    which fixes the problem.

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

            PR tree-optimization/110726

    gcc/ChangeLog:

            * match.pd ((a|b)&(a=3D=3Db),a|(a=3D=3Db),(a&b)|(a=3D=3Db)):
            Add checks to make sure the type was one bit precision
            intergal type.

    gcc/testsuite/ChangeLog:

            * gcc.c-torture/execute/bitops-1.c: New test.=