[Bug target/91150] [10 Regression] wrong code with -O -mavx512vbmi due to wrong writemask

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91150

--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Aug 30 12:49:27 2019
New Revision: 275164

URL: https://gcc.gnu.org/viewcvs?rev=275164&root=gcc&view=rev
Log:
        Backported from mainline
        2019-07-30  Jakub Jelinek  <jakub@redhat.com>

        PR target/91150
        * config/i386/i386.c (expand_vec_perm_blend): Change mask type
        from unsigned to unsigned HOST_WIDE_INT.  For E_V64QImode cast
        comparison to unsigned HOST_WIDE_INT before shifting it left.

        * gcc.target/i386/avx512bw-pr91150.c: New test.

Added:
    branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/avx512bw-pr91150.c
Modified:
    branches/gcc-7-branch/gcc/ChangeLog
    branches/gcc-7-branch/gcc/config/i386/i386.c
    branches/gcc-7-branch/gcc/testsuite/ChangeLog