Q, try setting R600_STREAMOUT to 0.
If DaemonFC is right, you can try starting game from console using:
DRAW_USE_LLVM=0 game
Like (just my guesses):
DRAW_USE_LLVM=0 oilrush
DRAW_USE_LLVM=0 arma2
There is some know problem with LLVM, you can take a look at:
http://llvm.org/bugs/show_bug.cgi?id=12151 (the right place)
http://bugs.winehq.org/show_bug.cgi?id=29786 (cross-report)
https://bugzilla.novell.com/show_bug.cgi?id=747333 (cross-report)