[Bug target/85323] SSE/AVX/AVX512 shift by 0 not optimized away

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85323

--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu May 17 10:07:12 2018
New Revision: 260313

URL: https://gcc.gnu.org/viewcvs?rev=260313&root=gcc&view=rev
Log:
        PR target/85323
        * config/i386/i386.c (ix86_fold_builtin): Handle masked shifts
        even if the mask is not all ones.

        * gcc.target/i386/pr85323-7.c: New test.
        * gcc.target/i386/pr85323-8.c: New test.
        * gcc.target/i386/pr85323-9.c: New test.

Added:
    trunk/gcc/testsuite/gcc.target/i386/pr85323-7.c
    trunk/gcc/testsuite/gcc.target/i386/pr85323-8.c
    trunk/gcc/testsuite/gcc.target/i386/pr85323-9.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/i386/i386.c
    trunk/gcc/testsuite/ChangeLog