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 4E37F3898C6A; Mon,  9 May 2022 13:23:29 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 4E37F3898C6A
From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/105354] __builtin_shuffle for alignr generates
 suboptimal code unless SSSE3 is enabled
Date: Mon, 09 May 2022 13:23:29 +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: enhancement
X-Bugzilla-Who: cvs-commit at gcc dot gnu.org
X-Bugzilla-Status: UNCONFIRMED
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-105354-4-bPbr0PwVxw@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-105354-4@http.gcc.gnu.org/bugzilla/>
References: <bug-105354-4@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, 09 May 2022 13:23:29 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105354

--- Comment #4 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:fcda0efccad41eba9134c1bd9d024a93d93fb82f

commit r13-210-gfcda0efccad41eba9134c1bd9d024a93d93fb82f
Author: liuhongt <hongtao.liu@intel.com>
Date:   Wed Apr 27 16:24:44 2022 +0800

    Implement permutation with pslldq + psrldq + por when pshufb is not
available.

    pand/pandn may be used to clear upper/lower bits of the operands, in
    that case there will be 4-5 instructions for permutation, and it's
    still better than scalar codes.

    gcc/ChangeLog:

            PR target/105354
            * config/i386/i386-expand.cc
            (expand_vec_perm_pslldq_psrldq_por): New function.
            (ix86_expand_vec_perm_const_1): Try
            expand_vec_perm_pslldq_psrldq_por for both 3-instruction and
            4/5-instruction sequence.

    gcc/testsuite/ChangeLog:

            * gcc.target/i386/pr105354-1.c: New test.
            * gcc.target/i386/pr105354-2.c: New test.=