Final in the sense that hopefully we won't need a fourth one. It should provide the best performance (since the IR is not re-encoded in Python) and I've tried t

Final in the sense that hopefully we won't need a fourth one. It should provide the best performance (since the IR is not re-encoded in Python) and I've tried to make it flexible and future proof. llvmlite currently only supports LLVM 3.8, while I quickly tested llvmcpy with 3.4, 3.8 and 3.9 and works flawlessly. Still quite alpha, though.