[Bug target/88461] AVX512: gcc should keep value in kN registers if possible

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88461

--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Dec 13 08:00:42 2018
New Revision: 267077

URL: https://gcc.gnu.org/viewcvs?rev=267077&root=gcc&view=rev
Log:
        PR target/88461
        * config/i386/sse.md (VI1248_AVX512VLBW, AVX512ZEXTMASK): New
        mode iterators.
        (<avx512>_testm<mode>3<mask_scalar_merge_name>,
        <avx512>_testnm<mode>3<mask_scalar_merge_name>): Merge patterns
        with VI12_AVX512VL and VI48_AVX512VL iterators into ones with
        VI1248_AVX512VLBW iterator.
        (*<avx512>_testm<VI1248_AVX512VLBW:mode>3_zext,
        *<avx512>_testm<VI1248_AVX512VLBW:mode>3_zext_mask,
        *<avx512>_testnm<VI1248_AVX512VLBW:mode>3_zext,
        *<avx512>_testnm<VI1248_AVX512VLBW:mode>3_zext_mask): New
        define_insns.

        * gcc.target/i386/pr88461.c: New test.

Added:
    trunk/gcc/testsuite/gcc.target/i386/pr88461.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/i386/sse.md
    trunk/gcc/testsuite/ChangeLog