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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 c/110491] Wrong code at -O2 on x86_64-linux-gnu (a recent
 regression)
Date: Tue, 04 Jul 2023 12:16:51 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D110491

--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Richard Biener <rguenth@gcc.gnu.org>:

https://gcc.gnu.org/g:819285ef10a87d663f8c181c06aa88d1d9f75aed

commit r14-2296-g819285ef10a87d663f8c181c06aa88d1d9f75aed
Author: Richard Biener <rguenther@suse.de>
Date:   Tue Jul 4 12:52:27 2023 +0200

    tree-optimization/110491 - PHI-OPT and undefs

    The following makes sure to not make conditional undefs in PHI arguments
    unconditional by folding cond ? arg1 : arg2.

            PR tree-optimization/110491
            * tree-ssa-phiopt.cc (match_simplify_replacement): Check
            whether the PHI args are possibly undefined before folding
            the COND_EXPR.

            * gcc.dg/torture/pr110491.c: New testcase.=