alt Hacker NewsIt does change the semantics if n is negative or large enough to cause an overflow. The challenge for the compiler is to somehow prove that neither of those things can happen.
It does change the semantics if n is negative or large enough to cause an overflow. The challenge for the compiler is to somehow prove that neither of those things can happen.
It doesn't have to prove absence of overflow since that is undefined behavior in C and thus modern compilers assume it can never happen.