@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::@7
  [5] (byte*) main::screen#3 ← phi( main/(byte*) 1024 main::@7/(byte*) main::screen#2 )
  [5] (byte) main::i#2 ← phi( main/(byte) 0 main::@7/(byte) main::i#1 )
  [6] (byte~) main::$0 ← (byte) main::i#2 & (byte) 1
  [7] if((byte) 0!=(byte~) main::$0) goto main::@2
  to:main::@3
main::@3: scope:[main]  from main::@1
  [8] (byte~) main::$2 ← (byte) main::i#2 << (byte) 2
  to:main::@4
main::@4: scope:[main]  from main::@2 main::@3
  [9] (byte~) main::$5 ← phi( main::@2/(byte~) main::$4 main::@3/(byte~) main::$2 )
  [10] *((byte*) main::screen#3) ← (byte~) main::$5
  [11] (byte*) main::screen#1 ← ++ (byte*) main::screen#3
  [12] (byte~) main::$6 ← (byte) main::i#2 & (byte) 1
  [13] if((byte) 0!=(byte~) main::$6) goto main::@5
  to:main::@6
main::@6: scope:[main]  from main::@4
  [14] (byte~) main::$8 ← (byte) main::i#2 << (byte) 2
  to:main::@7
main::@7: scope:[main]  from main::@5 main::@6
  [15] (byte~) main::$11 ← phi( main::@5/(byte~) main::$10 main::@6/(byte~) main::$8 )
  [16] *((byte*) main::screen#1) ← (byte~) main::$11
  [17] (byte*) main::screen#2 ← ++ (byte*) main::screen#1
  [18] (byte) main::i#1 ← ++ (byte) main::i#2
  [19] if((byte) main::i#1!=(byte) 3) goto main::@1
  to:main::@return
main::@return: scope:[main]  from main::@7
  [20] return 
  to:@return
main::@5: scope:[main]  from main::@4
  [21] (byte~) main::$10 ← (byte) main::i#2 + (byte) 3
  to:main::@7
main::@2: scope:[main]  from main::@1
  [22] (byte~) main::$4 ← (byte) main::i#2 + (byte) 3
  to:main::@4
