[Bug target/103750] [i386] GCC schedules KMOV instructions that destroys performance in loop

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103750

--- Comment #18 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:599bca27dc37b3f7979bd6af30a357104f2b90c1

commit r16-105-g599bca27dc37b3f7979bd6af30a357104f2b90c1
Author: liuhongt <hongtao....@intel.com>
Date:   Mon Apr 7 23:50:53 2025 -0700

    target: [PR103750] Also handle avx512 kmask & immediate 15 or 3 when VF is
4/2.

    Since the upper bits are already cleared by the comparison
    instructions.

    gcc/ChangeLog:
            PR target/103750
            * config/i386/sse.md (*<avx512>_cmp<mode>3_and15): New define_insn.
            (*<avx512>_ucmp<mode>3_and15): Ditto.
            (*<avx512>_cmp<mode>3_and3): Ditto.
            (*avx512vl_ucmpv2di3_and3): Ditto.
            (*<avx512>_cmp<V48H_AVX512VL:mode>3_zero_extend<SWI248x:mode>):
            Change operands[3] predicate to <cmp_imm_predicate>.
            (*<avx512>_cmp<V48H_AVX512VL:mode>3_zero_extend<SWI248x:mode>_2):
            Ditto.
            (*<avx512>_cmp<mode>3): Add GET_MODE_NUNITS (<MODE>mode) >= 8
            to the condition.
            (*<avx512>_ucmp<mode>3): Ditto.
            (V48_AVX512VL_4): New mode iterator.
            (VI48_AVX512VL_4): Ditto.
            (V8_AVX512VL_2): Ditto.

    gcc/testsuite/ChangeLog:

            * gcc.target/i386/avx512vl-pr103750-1.c: New test.
            * gcc.target/i386/avx512f-pr96891-3.c: Adjust testcase.
            * gcc.target/i386/avx512f-vpcmpgtuq-1.c: Ditto.
            * gcc.target/i386/avx512vl-vpcmpeqq-1.c: Ditto.
            * gcc.target/i386/avx512vl-vpcmpequq-1.c: Ditto.
            * gcc.target/i386/avx512vl-vpcmpgeq-1.c: Ditto.
            * gcc.target/i386/avx512vl-vpcmpgeuq-1.c: Ditto.
            * gcc.target/i386/avx512vl-vpcmpgtq-1.c: Ditto.
            * gcc.target/i386/avx512vl-vpcmpgtuq-1.c: Ditto.
            * gcc.target/i386/avx512vl-vpcmpleq-1.c: Ditto.
            * gcc.target/i386/avx512vl-vpcmpleuq-1.c: Ditto.
            * gcc.target/i386/avx512vl-vpcmpltq-1.c: Ditto.
            * gcc.target/i386/avx512vl-vpcmpltuq-1.c: Ditto.
            * gcc.target/i386/avx512vl-vpcmpneqq-1.c: Ditto.
            * gcc.target/i386/avx512vl-vpcmpnequq-1.c: Ditto.