[Bug target/85317] missing constant propagation on _mm(256)_movemask_*

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85317

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue May  8 12:04:25 2018
New Revision: 260040

URL: https://gcc.gnu.org/viewcvs?rev=260040&root=gcc&view=rev
Log:
        PR target/85317
        * config/i386/i386.c (ix86_fold_builtin): Handle
        IX86_BUILTIN_{,P}MOVMSK{PS,PD,B}{,128,256}.

        * gcc.target/i386/pr85317.c: New test.
        * gcc.target/i386/avx2-vpmovmskb-2.c (avx2_test): Add asm volatile
        optimization barrier to avoid optimizing away the expected insn.

Added:
    trunk/gcc/testsuite/gcc.target/i386/pr85317.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/i386/i386.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gcc.target/i386/avx2-vpmovmskb-2.c