That is ispc. You don't want "vectorization" though, you either want a) a code generation tool that generates exactly the platform-specific code you want and

That is ispc. You don't want "vectorization" though, you either want a) a code generation tool that generates exactly the platform-specific code you want and can't silently fail. b) at least a fundamentally vectorized language that does "scalarization" instead of the other way round.