https://bugs.freedesktop.org/show_bug.cgi?id=94037
--- Comment #3 from Ilia Mirkin imirkin@alum.mit.edu --- (In reply to peter.fiss from comment #2)
Thanks for the quick answer. I'm going to try mesa-git on my Manjaro machine, but it looks like it will take a while until llvm-svn and mesa-git are compiled and installed.
You should be fine with your system llvm (or no llvm at all, unless you're using radeonsi or are testing llvmpipe).