Comment # 20 on bug 99923 from Christoph Schwerdtfeger

I recompiled Mesa with LLVM 6.0 but that didn't change anything.

# glxinfo | grep -i llvm
    Device: AMD TAHITI (DRM 2.50.0 / 4.13.0-1-amd64, LLVM 6.0.0) (0x679a)
OpenGL renderer string: AMD TAHITI (DRM 2.50.0 / 4.13.0-1-amd64, LLVM 6.0.0)