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Subject: [Bug tree-optimization/97770] [ICELAKE]suboptimal vectorization for
 vpopcntw/b/q
Date: Tue, 22 Jun 2021 02:40:36 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D97770

--- Comment #21 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by hongtao Liu <liuhongt@gcc.gnu.org>:

https://gcc.gnu.org/g:e08a125b208e717f99caa991052537305ca75b6a

commit r12-1707-ge08a125b208e717f99caa991052537305ca75b6a
Author: liuhongt <hongtao.liu@intel.com>
Date:   Wed Jun 16 17:34:43 2021 +0800

    Add vect_recog_popcount_pattern to handle mismatch between the vectoriz=
ed
popcount IFN and scalar popcount builtin.

    The patch remove those pro- and demotions when backend support direct
    optab.

    For i386: it enables vectorization for vpopcntb/vpopcntw and optimized
    for vpopcntq.

    gcc/ChangeLog:

            PR tree-optimization/97770
            * tree-vect-patterns.c (vect_recog_popcount_pattern):
            New.
            (vect_recog_func vect_vect_recog_func_ptrs): Add new pattern.

    gcc/testsuite/ChangeLog:

            PR tree-optimization/97770
            * gcc.target/i386/avx512bitalg-pr97770-1.c: Remove xfail.
            * gcc.target/i386/avx512vpopcntdq-pr97770-1.c: Remove xfail.=