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 03E5C3858D39; Wed, 22 Sep 2021 02:40:19 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 03E5C3858D39
From: "crazylht at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/102404] Loop vectorized with 32 byte vectors actually
 uses 16 byte vectors
Date: Wed, 22 Sep 2021 02:40:18 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: target
X-Bugzilla-Version: 11.2.0
X-Bugzilla-Keywords: missed-optimization
X-Bugzilla-Severity: normal
X-Bugzilla-Who: crazylht at gmail dot com
X-Bugzilla-Status: NEW
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-102404-4-Zt33ljggXv@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-102404-4@http.gcc.gnu.org/bugzilla/>
References: <bug-102404-4@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: Wed, 22 Sep 2021 02:40:19 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D102404

--- Comment #6 from Hongtao.liu <crazylht at gmail dot com> ---
(In reply to Hongtao.liu from comment #5)
> (In reply to Freddie Witherden from comment #4)
> > Created attachment 51485 [details]
> > Clang assembly.
>=20
> It seems to be because the current GCC loop vectorizer does not support
> different vector sizes, and here the index vector is 256bit. Change
> tripcount to 16 successfully generate zmm.

Define index type from const int* to const long long * also can generate zm=
m.


.i.e.

void intcflux(int _nx, const double* __restrict__ magnl_v, const double*
__restrict__ nl_v, double* __restrict__ ul_v, const long long* __restrict__
ul_vix, double* __restrict__ ur_v, const long long* __restrict__ ur_vix)
{=