@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] (byte) main::i ← (byte) 0
  to:main::@1
main::@1: scope:[main]  from main main::@2
  [5] if((byte) main::i<(byte) 8) goto main::@2
  to:main::@return
main::@return: scope:[main]  from main::@1
  [6] return 
  to:@return
main::@2: scope:[main]  from main::@1
  [7] (byte~) main::$1 ← (byte) main::i << (byte) 1
  [8] *((const word*) SCREEN + (byte~) main::$1) ← (const word) main::ch
  [9] (byte) main::i ← ++ (byte) main::i
  [10] (byte~) main::$2 ← (byte) main::i << (byte) 1
  [11] *((const word*) SCREEN + (byte~) main::$2) ← (const word) main::ch
  [12] (byte) main::i ← ++ (byte) main::i
  to:main::@1
