[Bug target/85255] [8 Regression] wrong code with -O2 -fno-tree-fre -mavx512f

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85255

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Apr 10 12:37:36 2018
New Revision: 259269

URL: https://gcc.gnu.org/viewcvs?rev=259269&root=gcc&view=rev
Log:
        PR target/85177
        PR target/85255
        * config/i386/sse.md
        (<extract_type>_vinsert<shuffletype><extract_suf>_mask): Fix
        computation of the VEC_MERGE selector from mask.
        (<extract_type>_vinsert<shuffletype><extract_suf>_1<mask_name>):
        Fix decoding of the VEC_MERGE selector into mask.

        * gcc.target/i386/avx512f-pr85177.c: New test.
        * gcc.target/i386/avx512f-pr85255.c: New test.

Added:
    trunk/gcc/testsuite/gcc.target/i386/avx512f-pr85177.c
    trunk/gcc/testsuite/gcc.target/i386/avx512f-pr85255.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/i386/sse.md
    trunk/gcc/testsuite/ChangeLog