From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugzilla@gcc.gnu.org>
Received: by sourceware.org (Postfix, from userid 48)
	id A49F43858C54; Tue, 10 Oct 2023 17:28:00 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org A49F43858C54
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1696958880;
	bh=PdB/vtK+5Gt2Ti1UmkxWlsvtR3POOqZ1JzjrfzuR5yI=;
	h=From:To:Subject:Date:In-Reply-To:References:From;
	b=a07TswRHhd413zROqvGR2mPzVv6qN9NUpS+IYwkS9njul9ctXnT+wapEKXUCVh8m4
	 wRw4zLc4rlLDZ3DfY1NjCSl9e9m2Rv2xkMTYifpkEbByXGAAJmZAgL+ibEpWtZeD8j
	 AZu9oGqPo7ntBlI4xJ8Fx3OcekJ4aw5R/Dpar5WA=
From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/111679] `(~a) | (a ^ b)` is not simplified to
 `~(a & b)`
Date: Tue, 10 Oct 2023 17:27:59 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: tree-optimization
X-Bugzilla-Version: 14.0
X-Bugzilla-Keywords: missed-optimization, patch
X-Bugzilla-Severity: enhancement
X-Bugzilla-Who: cvs-commit at gcc dot gnu.org
X-Bugzilla-Status: ASSIGNED
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: pinskia at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-111679-4-rw6CLh2WfC@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-111679-4@http.gcc.gnu.org/bugzilla/>
References: <bug-111679-4@http.gcc.gnu.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
List-Id: <gcc-bugs.sourceware.org>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D111679

--- Comment #3 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:975da6fa9170c9cf1ec4a9a9d8177f8561d464d1

commit r14-4543-g975da6fa9170c9cf1ec4a9a9d8177f8561d464d1
Author: Andrew Pinski <pinskia@gmail.com>
Date:   Mon Oct 9 11:07:08 2023 -0700

    MATCH: [PR111679] Add alternative simplification of `a | ((~a) ^ b)`

    So currently we have a simplification for `a | ~(a ^ b)` but
    that does not match the case where we had originally `(~a) | (a ^ b)`
    so we need to add a new pattern that matches that and uses
bitwise_inverted_equal_p
    that also catches comparisons too.

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

            PR tree-optimization/111679

    gcc/ChangeLog:

            * match.pd (`a | ((~a) ^ b)`): New pattern.

    gcc/testsuite/ChangeLog:

            * gcc.dg/tree-ssa/bitops-5.c: New test.=