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 26649385C32C; Tue, 14 Jun 2022 08:23:33 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 26649385C32C
From: "crazylht at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/105965] x86: single-element vectors don't have scalar
 FMA insns used anymore
Date: Tue, 14 Jun 2022 08:23:33 +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: 12.1.0
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: normal
X-Bugzilla-Who: crazylht at gmail dot com
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: cc
Message-ID: <bug-105965-4-78uLdEIx6i@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-105965-4@http.gcc.gnu.org/bugzilla/>
References: <bug-105965-4@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: Tue, 14 Jun 2022 08:23:33 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105965

Hongtao.liu <crazylht at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |crazylht at gmail dot com

--- Comment #1 from Hongtao.liu <crazylht at gmail dot com> ---
It looks like a regression since GCC9

typedef float v1sf __attribute__((vector_size(4)));

v1sf
foo43 (v1sf a, v1sf b, v1sf c)
{
    return a * b + c;
}

gcc9 also don't generate vfmaddXXXss.

        pushq   %rbp
        movq    %rdi, %rax
        movq    %rsp, %rbp
        andq    $-32, %rsp
        vmovss  24(%rbp), %xmm0
        vmulss  16(%rbp), %xmm0, %xmm0
        vaddss  32(%rbp), %xmm0, %xmm0
        vmovss  %xmm0, -64(%rsp)
        movl    -64(%rsp), %edx
        movl    %edx, (%rdi)
        leave
        ret=