Are you guys taking a look at Intel's ISPC language? I haven't seen anything even come close as far as SIMD speed goes. It is open and compiles to LLVM -> .o + .h files.
I don't know, but I doubt it. Maybe there is knowledge transfer there, but ISPC is a separate language that uses a 'varying' keyword to control whether a variable represents a SIMD 'gang' or not.