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 9FF103858415; Mon, 11 Jul 2022 13:20:17 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 9FF103858415
From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/99416] s211 benchmark of TSVC is vectorized
 by icc and not by gcc
Date: Mon, 11 Jul 2022 13:20:17 +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: 11.0
X-Bugzilla-Keywords: missed-optimization
X-Bugzilla-Severity: normal
X-Bugzilla-Who: rguenth at gcc dot gnu.org
X-Bugzilla-Status: ASSIGNED
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: rguenth at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: bug_status assigned_to
Message-ID: <bug-99416-4-Iqqcp1BhTX@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-99416-4@http.gcc.gnu.org/bugzilla/>
References: <bug-99416-4@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
X-BeenThere: gcc-bugs@gcc.gnu.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Gcc-bugs mailing list <gcc-bugs.gcc.gnu.org>
List-Unsubscribe: <https://gcc.gnu.org/mailman/options/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=unsubscribe>
List-Archive: <https://gcc.gnu.org/pipermail/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-request@gcc.gnu.org?subject=help>
List-Subscribe: <https://gcc.gnu.org/mailman/listinfo/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=subscribe>
X-List-Received-Date: Mon, 11 Jul 2022 13:20:17 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D99416

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
           Assignee|unassigned at gcc dot gnu.org      |rguenth at gcc dot =
gnu.org

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Note after "fixing" (disabling) the costing issue we get to

Fuse partitions because they are in the same dependence scc:
  Part 1: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 17, 18, 20, 21
  Part 2: 1, 2, 3, 7, 11, 12, 13, 14, 15, 16, 17, 18, 20, 21
Loop nest 1 not distributed.

still a[i] =3D b[i - 1] can be performed separately but second while
b[i] =3D b[i + 1] needs to be performed first.  That means the
dependence analysis interpretation needs improvement.=