No.

If your function does "return <some local var>", as in

    Foo xyzzy() {
        Foo ret;
        /* do stuff to ret */
        return ret;
    }

then the compiler can rewrite it to be something like

    void xyzzy(void * _ptr) {
        Foo * _ret = new(_ptr)Foo();
        /* do stuff to *_ret */
    }

where the function-local variable that gets returned is actually just constructed in the place that it would eventually be returned/copied to and so doesn't have to be returned at all.