Comment # 12 on bug 99078 from Furkan

I'm experiencing a similar issue after updating to the same packages. I ran
some tests last night, with Michel's suggestions on IRC. The problem goes away
when I build Mesa against LLVM 3.8. So the bug was most likely introduced
between with the LLVM update, going from 3.9.0 to 3.9.1rc3. Hopefully I'll get
around to bisecting it to find the offending commit.