[Bug target/84786] [miscompilation] vunpcklpd accessing xmm16-22 targeting KNL

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84786

--- Comment #18 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Mon Jun 25 12:48:29 2018
New Revision: 262014

URL: https://gcc.gnu.org/viewcvs?rev=262014&root=gcc&view=rev
Log:
        PR target/84786
        * config/i386/sse.md (vshift_count): New mode attr.
        (<shift_insn><mode>3<mask_name>): Use <vshift_count>N instead of vN
        as last operand's constraint for VI2_AVX2_AVX512BW shifts.  Use YvN
        instead of vN as last operand's constraint for VI48_AVX2 shifts.

        * gcc.target/i386/avx512f-pr84786-3.c: New test.

Added:
    branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/avx512f-pr84786-3.c
Modified:
    branches/gcc-7-branch/gcc/ChangeLog
    branches/gcc-7-branch/gcc/config/i386/sse.md
    branches/gcc-7-branch/gcc/testsuite/ChangeLog