https://bugs.freedesktop.org/show_bug.cgi?id=89785
--- Comment #13 from Andreas Grois dragon.arises@gmail.com --- (In reply to Alex B from comment #11)
I can confirm, patch from the last comment fixes this issue on my Radeon HD 7750.
Same here. Pillars of Eternity seems to work now on my system (llvm-3.6.0 with the patch and mesa-10-5.2, Radeon R9 270X).