Should the state variables be passed around as pointers or should tail calls be used?

Method 1:

func() {
    ...
    foo(&stateVariable1);
    bar(&stateVariable1, &stateVariable2);
    ... // result using state-variables 1 & 2
    return result;
}

Method 2:

func() {
   ... // foo
   return bar(stateVariable1);
}