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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/110176] [11 Regression] wrong code at -Os and
 above on x86_64-linux-gnu since r11-2446
Date: Fri, 21 Jun 2024 09:22:54 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D110176

--- Comment #14 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-11 branch has been updated by Richard Biener
<rguenth@gcc.gnu.org>:

https://gcc.gnu.org/g:0d0f181dedb928a6dbb9af040a09cda3f4d5da64

commit r11-11530-g0d0f181dedb928a6dbb9af040a09cda3f4d5da64
Author: Richard Biener <rguenther@suse.de>
Date:   Wed Jan 31 14:40:24 2024 +0100

    middle-end/110176 - wrong zext (bool) <=3D (int) 4294967295u folding

    The following fixes a wrong pattern that didn't match the behavior
    of the original fold_widened_comparison in that get_unwidened
    returned a constant always in the wider type.  But here we're
    using (int) 4294967295u without the conversion applied.  Fixed
    by doing as earlier in the pattern - matching constants only
    if the conversion was actually applied.

            PR middle-end/110176
            * match.pd (zext (bool) <=3D (int) 4294967295u): Make sure
            to match INTEGER_CST only without outstanding conversion.

            * gcc.dg/torture/pr110176.c: New testcase.

    (cherry picked from commit 22dbfbe8767ff4c1d93e39f68ec7c2d5b1358beb)=