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 986A03858410; Mon,  6 Dec 2021 11:53:59 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 986A03858410
From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/103544] [11/12 Regression] compiler crashes
 when trying to vectorize loop
Date: Mon, 06 Dec 2021 11:53:59 +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: 11.2.0
X-Bugzilla-Keywords: ice-on-valid-code
X-Bugzilla-Severity: normal
X-Bugzilla-Who: cvs-commit at gcc dot gnu.org
X-Bugzilla-Status: ASSIGNED
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P2
X-Bugzilla-Assigned-To: rguenth at gcc dot gnu.org
X-Bugzilla-Target-Milestone: 11.3
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-103544-4-lrmB5qrTq1@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-103544-4@http.gcc.gnu.org/bugzilla/>
References: <bug-103544-4@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, 06 Dec 2021 11:53:59 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D103544

--- Comment #6 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Richard Biener <rguenth@gcc.gnu.org>:

https://gcc.gnu.org/g:ee01694151edc7e8aef84dc3c484469e2ae443a0

commit r12-5803-gee01694151edc7e8aef84dc3c484469e2ae443a0
Author: Richard Biener <rguenther@suse.de>
Date:   Mon Dec 6 11:43:28 2021 +0100

    tree-optimization/103544 - SLP reduction chain as SLP reduction issue

    When SLP reduction chain vectorization support added handling of
    an outer conversion in the chain picking a failed reduction up
    as SLP reduction that broke the invariant that the whole reduction
    was forward reachable.  The following plugs that hole noting
    a future enhancement possibility.

    2021-12-06  Richard Biener  <rguenther@suse.de>

            PR tree-optimization/103544
            * tree-vect-slp.c (vect_analyze_slp): Only add a SLP reduction
            opportunity if the stmt in question is the reduction root.
            (dot_slp_tree): Add missing check for NULL child.

            * gcc.dg/vect/pr103544.c: New testcase.=