[Bug target/95488] Suboptimal multiplication codegen for v16qi

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95488

--- Comment #6 from CVS 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:54cdb2f5a5b01a482d7cbce30e7b738558eecf59

commit r11-1301-g54cdb2f5a5b01a482d7cbce30e7b738558eecf59
Author: liuhongt <hongtao....@intel.com>
Date:   Wed Jun 3 17:25:47 2020 +0800

    Optimize multiplication for V8QI,V16QI,V32QI under TARGET_AVX512BW.

    2020-06-13   Hongtao Liu  <hongtao....@intel.com>

    gcc/ChangeLog:
            PR target/95488
            * config/i386/i386-expand.c (ix86_expand_vecmul_qihi): New
            function.
            * config/i386/i386-protos.h (ix86_expand_vecmul_qihi): Declare.
            * config/i386/sse.md (mul<mode>3): Drop mask_name since
            there's no real simd int8 multiplication instruction with
            mask. Also optimize it under TARGET_AVX512BW.
            (mulv8qi3): New expander.

    gcc/testsuite/ChangeLog:
            * gcc.target/i386/avx512bw-pr95488-1.c: New test.
            * gcc.target/i386/avx512bw-pr95488-2.c: Ditto.
            * gcc.target/i386/avx512vl-pr95488-1.c: Ditto.
            * gcc.target/i386/avx512vl-pr95488-2.c: Ditto.