[Bug target/94908] Failure to optimally optimize certain shuffle patterns

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94908

--- Comment #11 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Uros Bizjak <u...@gcc.gnu.org>:

https://gcc.gnu.org/g:95b99e47f4f2df2d0c5680f45e3ec0a3170218ad

commit r14-47-g95b99e47f4f2df2d0c5680f45e3ec0a3170218ad
Author: Uros Bizjak <ubiz...@gmail.com>
Date:   Tue Apr 18 17:50:37 2023 +0200

    i386: Improve permutations with INSERTPS instruction [PR94908]

    INSERTPS can select any element from src and insert into any place
    of the dest.  For SSE4.1 targets, compiler can generate e.g.

            insertps $64, %xmm0, %xmm1

    to insert element 1 from %xmm1 to element 0 of %xmm0.

    gcc/ChangeLog:

            PR target/94908
            * config/i386/i386-builtin.def (__builtin_ia32_insertps128):
            Use CODE_FOR_sse4_1_insertps_v4sf.
            * config/i386/i386-expand.cc (expand_vec_perm_insertps): New.
            (expand_vec_perm_1): Call expand_vec_per_insertps.
            * config/i386/i386.md ("unspec"): Declare UNSPEC_INSERTPS here.
            * config/i386/mmx.md (mmxscalarmode): New mode attribute.
            (@sse4_1_insertps_<mode>): New insn pattern.
            * config/i386/sse.md (@sse4_1_insertps_<mode>): Macroize insn
            pattern from sse4_1_insertps using VI4F_128 mode iterator.

    gcc/testsuite/ChangeLog:

            PR target/94908
            * gcc.target/i386/pr94908.c: New test.
            * gcc.target/i386/sse4_1-insertps-5.c: New test.
            * gcc.target/i386/vperm-v4sf-2-sse4.c: New test.