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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/55266] vector expansion: 24 movs for 4 adds
Date: Fri, 21 Jul 2023 12:12:11 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D55266

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |FIXED
             Status|ASSIGNED                    |RESOLVED

--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
The original issue is fixed.

f:
.LFB0:
        .cfi_startproc
        movapd  (%rdi), %xmm2
        movapd  16(%rdi), %xmm1
        movapd  %xmm2, %xmm0
        addpd   %xmm2, %xmm0
        addpd   %xmm2, %xmm0
        movaps  %xmm0, (%rdi)
        movapd  %xmm1, %xmm0
        addpd   %xmm1, %xmm0
        addpd   %xmm1, %xmm0
        movaps  %xmm0, 16(%rdi)
        ret

the issue in comment#4 as well I think:

_Z5dotd1Dv4_fS_:
.LFB3:
        .cfi_startproc
        movaps  %xmm1, %xmm3
        pxor    %xmm2, %xmm2
        movhlps %xmm0, %xmm2
        cvtps2pd        %xmm0, %xmm0
        cvtps2pd        %xmm2, %xmm1
        pxor    %xmm2, %xmm2
        movhlps %xmm3, %xmm2
        cvtps2pd        %xmm3, %xmm3
        cvtps2pd        %xmm2, %xmm2
        mulpd   %xmm3, %xmm0
        mulpd   %xmm2, %xmm1
        addpd   %xmm0, %xmm1
        movapd  %xmm1, %xmm0
        unpckhpd        %xmm1, %xmm0
        addpd   %xmm1, %xmm0
        cvtsd2ss        %xmm0, %xmm0
        ret
        .cfi_endproc
.LFE3:
        .size   _Z5dotd1Dv4_fS_, .-_Z5dotd1Dv4_fS_
        .p2align 4
        .globl  _Z5dotd2Dv4_fS_
        .type   _Z5dotd2Dv4_fS_, @function
_Z5dotd2Dv4_fS_:
.LFB4:
        .cfi_startproc
        movaps  %xmm1, %xmm3
        cvtps2pd        %xmm0, %xmm4
        pxor    %xmm2, %xmm2
        movhlps %xmm0, %xmm2
        pxor    %xmm0, %xmm0
        movhlps %xmm3, %xmm0
        cvtps2pd        %xmm2, %xmm2
        cvtps2pd        %xmm1, %xmm1
        cvtps2pd        %xmm0, %xmm0
        mulpd   %xmm4, %xmm1
        mulpd   %xmm0, %xmm2
        addpd   %xmm2, %xmm1
        movapd  %xmm1, %xmm0
        unpckhpd        %xmm1, %xmm0
        addpd   %xmm1, %xmm0
        cvtsd2ss        %xmm0, %xmm0
        ret=