does breaking expression into multiple variables slow execution

Question

I'm curious if I break an expression into different declarations e.g

int x = (c / 23) % (5 *3);

into

int a = c /23;
int b = 5 * 3;
int x = a % b;

does it slow down execution, or the compiler should recognize that it can be declared into one variable. (or some other trick)

I want to know if it can be a concern to give up some readability at a performance sensitive function.

Of course, I'm not asking about this particular example, my question is about the the general rule here.

I'm using C++, but I guess is that this question can be generalized to any - at least compiled - language.