Oops! LLVM 3.3 is branched today. I wish this bug vanished from LLVM before release of v3.3 in June Updated today's mesa and llvm-trunks... Without "-v1" flag, "bfgminer --benchmark" reports: [2013-05-08 03:37:54] Error -11: Building Program (clBuildProgram) [2013-05-08 03:37:54] input.cl:197:7: error: initializing 'uint' (aka 'unsigned int') with an expression of incompatible type 'unsigned int __attribute__((ext_ve ctor_type(2)))' uint r = rot(W[3].x,25u)^rot(W[3].x,14u)^((W[3].x)>>3U); @Aaron, could you use pyrit or any other OpenCL tools with yours HD6850 without lockup? Regards.