@begin: scope:[]  from
  [0] phi()
  to:@1
@1: scope:[]  from @begin
  [1] phi()
  [2] call main 
  to:@end
@end: scope:[]  from @1
  [3] phi()
main: scope:[main]  from @1
  [4] phi()
  to:main::@1
main::@1: scope:[main]  from main main::@5
  [5] (byte) main::idx#10 ← phi( main/(byte) 0 main::@5/(byte) main::idx#1 )
  [5] (byte) main::i#10 ← phi( main/(byte) 0 main::@5/(byte) main::i#1 )
  [6] (byte~) main::$0 ← (byte) main::i#10 & (byte) 1
  [7] if((byte) 0==(byte~) main::$0) goto main::@2
  to:main::@6
main::@6: scope:[main]  from main::@1
  [8] *((const byte*) SCREEN#0 + (byte) main::idx#10) ← (byte) '+'
  to:main::@2
main::@2: scope:[main]  from main::@1 main::@6
  [9] (byte~) main::$3 ← (byte) main::i#10 & (byte) 2
  [10] if((byte) 0==(byte~) main::$3) goto main::@3
  to:main::@7
main::@7: scope:[main]  from main::@2
  [11] *((const byte*) SCREEN#0+(byte)(number) $28*(number) 1 + (byte) main::idx#10) ← (byte) '+'
  to:main::@3
main::@3: scope:[main]  from main::@2 main::@7
  [12] (byte~) main::$6 ← (byte) main::i#10 & (byte) 1
  [13] (byte~) main::$7 ← (byte) main::i#10 & (byte) 2
  [14] if((byte) 0==(byte~) main::$6) goto main::@4
  to:main::@10
main::@10: scope:[main]  from main::@3
  [15] if((byte) 0==(byte~) main::$7) goto main::@4
  to:main::@8
main::@8: scope:[main]  from main::@10
  [16] *((const byte*) SCREEN#0+(byte)(number) $28*(number) 2 + (byte) main::idx#10) ← (byte) '+'
  to:main::@4
main::@4: scope:[main]  from main::@10 main::@3 main::@8
  [17] (byte~) main::$11 ← (byte) main::i#10 & (byte) 1
  [18] (byte~) main::$12 ← (byte) main::i#10 & (byte) 2
  [19] if((byte) 0!=(byte~) main::$11) goto main::@9
  to:main::@11
main::@11: scope:[main]  from main::@4
  [20] if((byte) 0==(byte~) main::$12) goto main::@5
  to:main::@9
main::@9: scope:[main]  from main::@11 main::@4
  [21] *((const byte*) SCREEN#0+(byte)(number) $28*(number) 3 + (byte) main::idx#10) ← (byte) '+'
  to:main::@5
main::@5: scope:[main]  from main::@11 main::@9
  [22] (byte) main::idx#1 ← ++ (byte) main::idx#10
  [23] (byte) main::i#1 ← ++ (byte) main::i#10
  [24] if((byte) main::i#1!=(byte) 8) goto main::@1
  to:main::@return
main::@return: scope:[main]  from main::@5
  [25] return 
  to:@return
