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From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/98167] [x86] Failure to optimize operation on
 indentically shuffled operands into a shuffle of the result of the operation
Date: Tue, 15 Nov 2022 05:36:38 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D98167

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

https://gcc.gnu.org/g:dc95e1e9702f2f6367bbc108c8d01169be1b66d2

commit r13-4044-gdc95e1e9702f2f6367bbc108c8d01169be1b66d2
Author: Hongyu Wang <hongyu.wang@intel.com>
Date:   Mon Jan 17 13:01:51 2022 +0800

    Optimize VEC_PERM_EXPR with same permutation index and operation

    The sequence
         c1 =3D VEC_PERM_EXPR (a, a, mask)
         c2 =3D VEC_PERM_EXPR (b, b, mask)
         c3 =3D c1 op c2
    can be optimized to
         c =3D a op b
         c3 =3D VEC_PERM_EXPR (c, c, mask)
    for all integer vector operation, and float operation with
    full permutation.

    gcc/ChangeLog:

            PR target/98167
            * match.pd: New perm + vector op patterns for int and fp vector.

    gcc/testsuite/ChangeLog:

            PR target/98167
            * gcc.target/i386/pr98167.c: New test.=