https://bugs.freedesktop.org/show_bug.cgi?id=79154
--- Comment #2 from smoki smoki00790@gmail.com ---
Again like in bug 79155, you seems to use spill-fixes and bug is related to that - so you should mention that i think :).
Without spill-fixes MSAA 2x works for me on Radeon 8400, but with MSAA 4x there is crash when loading 'complex' map with message "LLVM ERROR: ran out of registers during register allocation".