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 1F0C03877034; Tue,  7 Apr 2020 21:07:53 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 1F0C03877034
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
 s=default; t=1586293673;
 bh=j+N9O/zfPuAqzHXzxIN1FWWbcslexd4E/P9509FSEak=;
 h=From:To:Subject:Date:In-Reply-To:References:From;
 b=nbYNzY0PmNgkRqZI46ncjOaXRx/9vn4cRbYtCnNZpuswQSyF3fp4pfOwyxuSyvlGc
 Wm0RoV4b1USOppd8iETyK2UyRBuguyoZaglRPyhRTdCuzl44G4Zes9A/THKxw/TN8A
 0eyPWvkUyc7v38f8Di9KTTd6ejWNUVwoiZkc45sY=
From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/94524] [8/9/10 Regression] wrong code with
 vector modulo operation since r0-117580
Date: Tue, 07 Apr 2020 21:07:52 +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: 10.0
X-Bugzilla-Keywords: wrong-code
X-Bugzilla-Severity: normal
X-Bugzilla-Who: jakub at gcc dot gnu.org
X-Bugzilla-Status: ASSIGNED
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: jakub at gcc dot gnu.org
X-Bugzilla-Target-Milestone: 8.5
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: short_desc cc target_milestone assigned_to
 bug_status everconfirmed cf_reconfirmed_on
Message-ID: <bug-94524-4-eSYez6hGUd@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-94524-4@http.gcc.gnu.org/bugzilla/>
References: <bug-94524-4@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: <http://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: <http://gcc.gnu.org/mailman/listinfo/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=subscribe>
X-List-Received-Date: Tue, 07 Apr 2020 21:07:53 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D94524

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|wrong code with vector      |[8/9/10 Regression] wrong
                   |modulo operation            |code with vector modulo
                   |                            |operation since r0-117580
                 CC|                            |jakub at gcc dot gnu.org
   Target Milestone|---                         |8.5
           Assignee|unassigned at gcc dot gnu.org      |jakub at gcc dot gn=
u.org
             Status|UNCONFIRMED                 |ASSIGNED
     Ever confirmed|0                           |1
   Last reconfirmed|                            |2020-04-07

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with my r0-117580-g4ee4c52c64cc1eeda53aae6e221b5b1bd9bd7421 so I
believe this should work correctly in 4.7 (and 4.6 didn't accept it).
The vect pattern code tried to follow what the expander does, but in that c=
ase
there is match.pd rule that canonicalizes x % -C into x % C.  Will need to =
dig
up if something in the expansion tweaks the sign of the divisor or if it has
the same bug as the vect pattern.=