Comment # 18 on bug 99923 from Christoph Schwerdtfeger

Unfortunately still the same...

# glxinfo | grep Mesa
client glx vendor string: Mesa Project and SGI
OpenGL core profile version string: 4.5 (Core Profile) Mesa 17.2.4
OpenGL version string: 3.0 Mesa 17.2.4
OpenGL ES profile version string: OpenGL ES 3.1 Mesa 17.2.4

# glxinfo | grep -i llvm
    Device: AMD TAHITI (DRM 2.50.0 / 4.13.0-1-amd64, LLVM 5.0.0) (0x679a)
OpenGL renderer string: AMD TAHITI (DRM 2.50.0 / 4.13.0-1-amd64, LLVM 5.0.0)