[Bug target/88465] AVX512: optimize loading of constant values to kN registers

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88465

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Dec 13 08:08:22 2018
New Revision: 267078

URL: https://gcc.gnu.org/viewcvs?rev=267078&root=gcc&view=rev
Log:
        PR target/88465
        * config/i386/i386.md (*movdi_internal, *movsi_internal,
        *movhi_internal, *movqi_internal): Add alternative(s) to load
        0 or -1 into k registers using kxor or kxnoq instructions.

        * gcc.target/i386/avx512f-pr88465.c: New test.
        * gcc.target/i386/avx512dq-pr88465.c: New test.

Added:
    trunk/gcc/testsuite/gcc.target/i386/avx512dq-pr88465.c
    trunk/gcc/testsuite/gcc.target/i386/avx512f-pr88465.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/i386/i386.md
    trunk/gcc/testsuite/ChangeLog