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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/46209] pmovmskb, useless sign extension
Date: Mon, 26 Jul 2021 09:25:58 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D46209

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Depends on|                            |66369
     Ever confirmed|0                           |1
   Last reconfirmed|                            |2021-07-26
             Status|UNCONFIRMED                 |NEW

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
foo64:
.LFB533:
        .cfi_startproc
        pmovmskb        %xmm0, %eax
        movzbl  %al, %eax
        ret

The 128 one was fixed with PR 66369.


Referenced Bugs:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D66369
[Bug 66369] gcc 4.8.3/5.1.0 miss optimisation with vpmovmskb=