https://bugs.freedesktop.org/show_bug.cgi?id=75276
--- Comment #29 from Pablo Cholaky waltercool@slash.cl --- I don't know if will help a lot, but a crash is "always reproducible" with LLVM 3.4.2 using my OLAND 8750M with "Civilization V", always on a leader scene.
Using LLVM from GIT I don't reproduce this, but is VERY slow, like darkbasic said. Is only on the leader scene.