@begin: scope:[]  from
  [0] phi()
  to:@1
@1: scope:[]  from @begin
  [1] phi()
  [2] call main 
  to:@end
@end: scope:[]  from @1
  [3] phi()

(void()) main()
main: scope:[main]  from @1
  [4] (word) main::p ← (byte) 2*(word) $100+(byte) 3
  [5] (byte~) main::$0 ← < *((const word*) main::q)
  [6] *((const byte*) main::SCREEN) ← (byte~) main::$0
  [7] (byte~) main::$1 ← > *((const word*) main::q)
  [8] *((const byte*) main::SCREEN+(byte) 1) ← (byte~) main::$1
  to:main::@return
main::@return: scope:[main]  from main
  [9] return 
  to:@return
