[Bug target/113090] Suboptimal vector permuation for 64-bit vector.

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113090

--- Comment #1 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by hongtao Liu <liuho...@gcc.gnu.org>:

https://gcc.gnu.org/g:a9f642783853b60bb0a59562b8ab3ed10ec01641

commit r15-234-ga9f642783853b60bb0a59562b8ab3ed10ec01641
Author: liuhongt <hongtao....@intel.com>
Date:   Wed Dec 20 11:54:43 2023 +0800

    Optimize 64-bit vector permutation with punpcklqdq + 128-bit vector pshuf.

    gcc/ChangeLog:

            PR target/113090
            * config/i386/i386-expand.cc
            (expand_vec_perm_punpckldq_pshuf): New function.
            (ix86_expand_vec_perm_const_1): Try
            expand_vec_perm_punpckldq_pshuf for sequence of 2
            instructions.

    gcc/testsuite/ChangeLog:

            * gcc.target/i386/pr113090.c: New test.