So why can't the compiler be smart enough to use a jump table when this is possible, and fall back to a sequence of else-if statements when it's not? The compi

So why can't the compiler be smart enough to use a jump table when this is possible, and fall back to a sequence of else-if statements when it's not? The compiler should even be able to make a more optimal sequence of assembly tests and jumps than by writing this code manually.