Without you have to do convoluted things like rearranging the expression to unnatural forms (move the addition to the right but invert to subtraction, etc), special case INT_MAX/INT_MIN, and so on - which you then have to hope the compiler is smart enough to optimize, which it often isn't (oh how ironic).
Without you have to do convoluted things like rearranging the expression to unnatural forms (move the addition to the right but invert to subtraction, etc), special case INT_MAX/INT_MIN, and so on - which you then have to hope the compiler is smart enough to optimize, which it often isn't (oh how ironic).