Latest mesa&llvm works for me too. 
I've tried also: unigine-[sanctuary/valley/tropics] & xonotic(and it looks like
everything goes faster about ~10%)

Unigine-heaven has a problem:
"LLVM ERROR: Not supported instr: <MCInst 2210 <MCOperand Reg:3171> <MCOperand
Imm:24> <MCOperand Reg:2044> <MCOperand Reg:74>>"

But i'll test it again tomorrow. And if things go wrong i'll fill a new bug.

thx.