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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/82139] unnecessary movapd with _mm_castsi128_pd to use
 BLENDPD on __m128i results
Date: Sat, 04 Sep 2021 03:01:49 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D82139

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2021-09-04
           Keywords|                            |ra
             Status|UNCONFIRMED                 |NEW
     Ever confirmed|0                           |1

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
It is worse on the trunk:
.L2:
        movdqu  (%rdi), %xmm1
        movdqu  (%rdi), %xmm0
        addq    $16, %rdi
        paddd   %xmm3, %xmm1
        paddd   %xmm2, %xmm0
        blendpd $2, %xmm0, %xmm1
        movups  %xmm1, -16(%rdi)
        cmpq    %rdi, %rax
        jne     .L2

Why two loads from %rdi here?
This is done during RA as far as I can tell.=