I was going to create a new bug but I think my issue may be the same.

With llvm-svn up to revision 267861 everything works fine, but starting with
revision 268162 I get the same issue as in Ersnt's screenshot.

My console prints many of these :
LLVM triggered Diagnostic Handler: LDS size exceeds device maximum
LLVM failed to compile shader
radeonsi: can't create a shader

Card is 280x so a bit different.

I am on latest mesa-git, and linux 4.5 (patched to get computer shader).
Downgrading llvm-svn fixes the issue right away.