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 09804385DC3A; Sat,  9 Mar 2024 05:55:48 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 09804385DC3A
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1709963749;
	bh=DuqQAShYMVq/pu8AkXSsvB4OLGqCQ4vjL65YwW/8Feo=;
	h=From:To:Subject:Date:In-Reply-To:References:From;
	b=OufPV3eOf1/WniKaxieMOKy9yn7fd91co05uRb6l1VtlJocbvjGJ2d/v/Ll0apcgd
	 3XAskwB9d+xQhaogwueADwuGmBQSMC+fGrt28Ot+1wdDY87/B1v/qSlsr1KSPAd4qt
	 P/nLU3HJ+wXim0XKmUVMlN+8TWPv+zLVrBEOmjnQ=
From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/110293] Some `A CMP (A NEEQ 0)` is not
 simplified in some cases
Date: Sat, 09 Mar 2024 05:55:48 +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
X-Bugzilla-Severity: enhancement
X-Bugzilla-Who: pinskia 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-110293-4-GQbCaxaTUc@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-110293-4@http.gcc.gnu.org/bugzilla/>
References: <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

--- Comment #10 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Here is some more optimizations where the inner CMP is not EQ/NE:
signed:
x =3D=3D (x <=3D CST) -> CST =3D=3D 0 ? false : CST < 0 ? x =3D=3D 0 : x =
=3D=3D 1
x =3D=3D (x  < CST) -> CST =3D=3D 1 ? false : CST <=3D 0 ? x =3D=3D 0 : x =
=3D=3D 1

unsigned:
x =3D=3D (x u<=3D CST) -> CST =3D=3D 0 ? false : x =3D=3D 1 (note 0 should =
already be
handled)
x =3D=3D (x u<=3D CST) -> CST =3D=3D 0 ? x =3D=3D 0 : CST =3D=3D 1 ? false =
: x =3D=3D 1 (note 0/1
should be handled already)=