you trade -fwrap for -ftrap, which is IMHO better. You would need hardware support for it to be even half efficient though. I don't hate the idea, but doing it

you trade -fwrap for -ftrap, which is IMHO better. You would need hardware support for it to be even half efficient though. I don't hate the idea, but doing it for existing int types might be a non-starter due to backward compatibility.