[Bug target/98167] [x86] Failure to optimize operation on indentically shuffled operands into a shuffle of the result of the operation

[cvs-commit at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98167

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

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

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

    Optimize VEC_PERM_EXPR with same permutation index and operation

    The sequence
         c1 = VEC_PERM_EXPR (a, a, mask)
         c2 = VEC_PERM_EXPR (b, b, mask)
         c3 = c1 op c2
    can be optimized to
         c = a op b
         c3 = 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.