Use this attribute to reduce the cost of calling a function that never returns, such as exit(). If a noreturn function returns to its caller, the behavior is undefined.

The return address is not preserved when calling the noreturn function. This limits the ability of a debugger to display the call stack.

__declspec(noreturn) void overflow(void); // never return on overflow
int negate(int x) 
{
    if (x == 0x80000000) overflow();
    return -x;
}