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 687CE3857816; Thu, 20 Jan 2022 08:52:03 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 687CE3857816
From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/103771] [12 Regression] Missed vectorization under
 -mavx512f -mavx512vl after r12-5489
Date: Thu, 20 Jan 2022 08:52:03 +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: 12.0
X-Bugzilla-Keywords: missed-optimization
X-Bugzilla-Severity: normal
X-Bugzilla-Who: cvs-commit at gcc dot gnu.org
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: 12.0
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-103771-4-B6SKdhOE5T@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-103771-4@http.gcc.gnu.org/bugzilla/>
References: <bug-103771-4@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: Thu, 20 Jan 2022 08:52:03 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D103771

--- Comment #31 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by hongtao Liu <liuhongt@gcc.gnu.org>:

https://gcc.gnu.org/g:8bc700f4c3fbe405413db02281ef2918bfa831fc

commit r12-6756-g8bc700f4c3fbe405413db02281ef2918bfa831fc
Author: liuhongt <hongtao.liu@intel.com>
Date:   Mon Jan 17 10:47:46 2022 +0800

    Enhance vec_pack_trunc for integral mode mask.

    For testcase in PR, the patch supports QI:4 -> HI:16 pack with
    multi steps(first pack QI:4 -> QI:8 through vec_pack_sbool_trunc_qi,
    then pack QI:8 -> HI:16 through vec_pack_trunc_hi).
    Similar for QI:2 -> HI:16 which is test4 in mask-pack-prefer-128.c.

    gcc/ChangeLog:

            PR target/103771
            * tree-vect-stmts.cc (supportable_narrowing_operation): Enhance
            integral mode mask pack by multi steps which takes
            vec_pack_sbool_trunc_optab as start when elements number is
            less than BITS_PER_UNITS.

    gcc/testsuite/ChangeLog:

            * gcc.target/i386/mask-pack-prefer128.c: New test.
            * gcc.target/i386/mask-pack-prefer256.c: New test.
            * gcc.target/i386/pr103771.c: New test.=