[Bug target/73350] AVX512: GCC optimizes away rounding flags

[kyukhin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=73350

--- Comment #8 from Kirill Yukhin <kyukhin at gcc dot gnu.org> ---
Author: kyukhin
Date: Thu Jun  8 11:24:50 2017
New Revision: 249009

URL: https://gcc.gnu.org/viewcvs?rev=249009&root=gcc&view=rev
Log:
[PR73350][PR80862] Improve subst for RC-capable insns.

PR target/73350,80862
gcc/
        * config/i386/subst.md (round): Fix round pattern.
        * config/i386/i386.c (ix86_erase_embedded_rounding):
        Fix erasing rounding for the fixed pattern.

gcc/testsuite/
        * gcc.target/i386/pr73350.c: New test.


Added:
    trunk/gcc/testsuite/gcc.target/i386/pr73350.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/i386/i386.c
    trunk/gcc/config/i386/subst.md
    trunk/gcc/testsuite/ChangeLog