[Bug target/98461] Suboptimal codegen for negating a movemask

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98461

--- Comment #7 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jakub Jelinek <jakub@gcc.gnu.org>:

https://gcc.gnu.org/g:8f7941ca37001773a36add8119791725aeb823ba

commit r11-6367-g8f7941ca37001773a36add8119791725aeb823ba
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Wed Dec 30 11:21:24 2020 +0100

    i386: Optimize pmovmskb on inverted vector to inversion of pmovmskb result
[PR98461]

    The following patch adds combine splitters to optimize:
    -       vpcmpeqd        %ymm1, %ymm1, %ymm1
    -       vpandn  %ymm1, %ymm0, %ymm0
            vpmovmskb       %ymm0, %eax
    +       notl    %eax
    etc. (for vectors with less than 32 elements with xorl instead of notl).

    2020-12-30  Jakub Jelinek  <jakub@redhat.com>

            PR target/98461
            * config/i386/sse.md (<sse2_avx2>_pmovmskb): Add splitters
            for pmovmskb of NOT vector.

            * gcc.target/i386/sse2-pr98461.c: New test.
            * gcc.target/i386/avx2-pr98461.c: New test.