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 274C33858D3C; Fri, 16 Jun 2023 23:22:58 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 274C33858D3C
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1686957778;
	bh=8ZUOFJUVQwk14KnE9YzNaG7qfeWqwn72nFiRitjxD/w=;
	h=From:To:Subject:Date:From;
	b=kWDrLtGQfjqA6heWDDn2J21YsyqXjzwEaWeFy4jEoSVImAfz8PL4kFP8ruqzQJP9W
	 91KwbSZyLr7EPmRQuFOuRjYZCQiDGELjH/842mjHPKiYfDoMRzVsfp5vYmIsIjrQq6
	 jYbyAyvWKs/UzbIFA/t5av2gf8FI2Xft5HX80edo=
From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/110293] New: Some `A CMP (A NEEQ 0)` is not
 simplified in some cases
Date: Fri, 16 Jun 2023 23:22:57 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: tree-optimization
X-Bugzilla-Version: 14.0
X-Bugzilla-Keywords: missed-optimization
X-Bugzilla-Severity: enhancement
X-Bugzilla-Who: pinskia at gcc dot gnu.org
X-Bugzilla-Status: UNCONFIRMED
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: bug_id short_desc product version bug_status
 keywords bug_severity priority component assigned_to reporter
 target_milestone
Message-ID: <bug-110293-4@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=3D110293

            Bug ID: 110293
           Summary: Some `A CMP (A NEEQ 0)` is not simplified in some
                    cases
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Keywords: missed-optimization
          Severity: enhancement
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: pinskia at gcc dot gnu.org
  Target Milestone: ---

The full set is:
`x !=3D (typeof x)(x =3D=3D 0)` is always true (PR 110278)
`x =3D=3D (typeof x)(x =3D=3D 0)` is always false.
`x =3D=3D (typeof x)(x !=3D 0)` is `(unsigned_type)x <=3D 1`
`x !=3D (typeof x)(x !=3D 0)` is `(unsigned_type)x > 1`


`uns < (typeof uns)(uns !=3D 0)` is always false (PR 110278)
`uns >=3D (typeof uns)(uns !=3D 0)` is always true
`uns <=3D (typeof uns)(uns !=3D 0)` is `uns <=3D 1`
`uns > (typeof uns)(uns !=3D 0)` is `uns > 1`=