1 padsv[$x]         -> 2
 2 padsv[$y]         -> 3
 3 add               -> 4

##</code><code>##

 1 padsv[$x]         ->  2
 2 padsv[$y]         ->  3
 3 add_if_overloaded ->  11 if overloaded, 4 otherwise
 4 swap_stack[0,1]   ->  5
 5 get_magic         ->  6
 6 numify            ->  7
 7 swap_stack[0,1]   ->  8
 8 get_magic         ->  9
 9 numify            -> 10
10 add_prenumified   -> 11

##</code><code>##

 1 padsv[$x]         ->  2
 2 padsv[$y]         -> 10
10 add_prenumified   -> 11