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 545163858D35; Mon,  7 Aug 2023 07:55:44 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 545163858D35
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1691394944;
	bh=vCe8l2oe+9kyHgkZEvQQ1jC9kd0EbjdLpneQ98TENxA=;
	h=From:To:Subject:Date:In-Reply-To:References:From;
	b=JrwtnBVujud4oSztkBwGZq0cDc+tvt7hTZeJReDKiBRweotrCdxj3XIenMOeWAGT4
	 LdexC/li+JWBJNSmVSeKh5FIjdFPYpYqj6dR5bgplH+XPhtiqPeT3FdtpO/jqstEUR
	 6ew2suQFcSRiIfrjiYr8OaOWDznewjJ417PCq5TY=
From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/18940] Loop is not vectorized when it should
 be (VRP)
Date: Mon, 07 Aug 2023 07:55:43 +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: 4.0.0
X-Bugzilla-Keywords: missed-optimization
X-Bugzilla-Severity: enhancement
X-Bugzilla-Who: pinskia at gcc dot gnu.org
X-Bugzilla-Status: RESOLVED
X-Bugzilla-Resolution: FIXED
X-Bugzilla-Priority: P2
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: 13.0
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: target_milestone bug_status resolution
Message-ID: <bug-18940-4-nG7uKGJOgn@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-18940-4@http.gcc.gnu.org/bugzilla/>
References: <bug-18940-4@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=3D18940

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |13.0
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #7 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Fixed in GCC 13.
DOM3 now optimizes it:

Optimizing statement _17 =3D D1360_10 > 0;
LKUP STMT _17 =3D D1360_10 gt_expr 0
2>>> STMT _17 =3D D1360_10 gt_expr 0
LKUP STMT D1360_10 le_expr 1
Optimizing statement _16 =3D (unsigned int) D1360_10;
LKUP STMT _16 =3D nop_expr D1360_10
2>>> STMT _16 =3D nop_expr D1360_10
Optimizing statement niters.3_18 =3D _17 ? _16 : 1;
  Replaced '_17' with constant '1'
 Registering value_relation (_16 pe32 D1360_10) (bb3) at _16 =3D (unsigned =
int)
D1360_10;
Applying pattern match.pd:4437, gimple-match.cc:176249
gimple_simplified to niters.3_18 =3D _16;
  Folded to: niters.3_18 =3D _16;=