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 BB4213857820; Mon, 15 Nov 2021 10:00:55 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org BB4213857820
From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/103237] [10/11/12 Regression] wrong code with
 -ftree-vectorize at -O1 on x86_64-linux-gnu
Date: Mon, 15 Nov 2021 10:00:55 +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: 12.0
X-Bugzilla-Keywords: needs-bisection, wrong-code
X-Bugzilla-Severity: normal
X-Bugzilla-Who: marxin 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: 9.5
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: cc
Message-ID: <bug-103237-4-QdgBU9SkuA@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-103237-4@http.gcc.gnu.org/bugzilla/>
References: <bug-103237-4@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, 15 Nov 2021 10:00:55 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D103237

Martin Li=C5=A1ka <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |alan.hayward at arm dot com

--- Comment #6 from Martin Li=C5=A1ka <marxin at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #5)
> And the following fails with GCC 9 and 7 as well (using SSE vectorization=
).
>=20
> int g1;
> unsigned int g2 =3D 4294967295U;
> static void __attribute__((noipa)) func_1()
> {
>   int *l_1 =3D &g1;
>   for (int g3a =3D 0; g3a !=3D 4; g3a++)
>     for (int l_2 =3D 0; l_2 <=3D 3; l_2++)
>       {
>         unsigned int *l_3 =3D &g2;
>         *l_1 =3D *l_3 ^=3D 1;
>       }
> }
> int main()
> {
>   func_1();
>   if (g1 !=3D -1)
>     __builtin_abort ();
>   return 0;
> }

This started to fail with r7-1219-gb28ead45fe630b9e.=