[Bug tree-optimization/70214] [4.9/5/6 regression] pthread_kill is not considered a barrier

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70214

--- Comment #7 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
https://gcc.gnu.org/ml/gcc-patches/2016-03/msg00788.html