One problem is that last I checked LLVM is not really all that portable across different hardware architectures (e.g. you can't use the same LLVM bitcode for bo

One problem is that last I checked LLVM is not really all that portable across different hardware architectures (e.g. you can't use the same LLVM bitcode for both x86 and AMD64 code generation; you can't use the same LLVM bitcode for both little-endian and big-endian hardware, etc, etc).