@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] phi()
  to:main::@1
main::@1: scope:[main]  from main main::@3
  [5] (byte) main::i#5 ← phi( main/(byte) $64 main::@3/(byte) main::i#1 )
  to:main::@2
main::@2: scope:[main]  from main::@1 main::@4
  [6] (byte) main::j#2 ← phi( main::@1/(byte) $64 main::@4/(byte) main::j#1 )
  [7] call nest1 
  to:main::@4
main::@4: scope:[main]  from main::@2
  [8] (byte) main::j#1 ← -- (byte) main::j#2
  [9] if((byte) main::j#1>(byte) 0) goto main::@2
  to:main::@3
main::@3: scope:[main]  from main::@4
  [10] (byte) main::i#1 ← -- (byte) main::i#5
  [11] if((byte) main::i#1>(byte) 0) goto main::@1
  to:main::@return
main::@return: scope:[main]  from main::@3
  [12] return 
  to:@return

(void()) nest1()
nest1: scope:[nest1]  from main::@2
  [13] phi()
  to:nest1::@1
nest1::@1: scope:[nest1]  from nest1 nest1::@3
  [14] (byte) nest1::i#5 ← phi( nest1/(byte) $64 nest1::@3/(byte) nest1::i#1 )
  to:nest1::@2
nest1::@2: scope:[nest1]  from nest1::@1 nest1::@4
  [15] (byte) nest1::j#2 ← phi( nest1::@1/(byte) $64 nest1::@4/(byte) nest1::j#1 )
  [16] call nest2 
  to:nest1::@4
nest1::@4: scope:[nest1]  from nest1::@2
  [17] (byte) nest1::j#1 ← -- (byte) nest1::j#2
  [18] if((byte) nest1::j#1>(byte) 0) goto nest1::@2
  to:nest1::@3
nest1::@3: scope:[nest1]  from nest1::@4
  [19] (byte) nest1::i#1 ← -- (byte) nest1::i#5
  [20] if((byte) nest1::i#1>(byte) 0) goto nest1::@1
  to:nest1::@return
nest1::@return: scope:[nest1]  from nest1::@3
  [21] return 
  to:@return

(void()) nest2()
nest2: scope:[nest2]  from nest1::@2
  [22] phi()
  to:nest2::@1
nest2::@1: scope:[nest2]  from nest2 nest2::@3
  [23] (byte) nest2::i#4 ← phi( nest2/(byte) $64 nest2::@3/(byte) nest2::i#1 )
  to:nest2::@2
nest2::@2: scope:[nest2]  from nest2::@1 nest2::@2
  [24] (byte) nest2::j#2 ← phi( nest2::@1/(byte) $64 nest2::@2/(byte) nest2::j#1 )
  [25] *((const byte*) SCREEN) ← (byte) nest2::j#2
  [26] (byte) nest2::j#1 ← -- (byte) nest2::j#2
  [27] if((byte) nest2::j#1>(byte) 0) goto nest2::@2
  to:nest2::@3
nest2::@3: scope:[nest2]  from nest2::@2
  [28] (byte) nest2::i#1 ← -- (byte) nest2::i#4
  [29] if((byte) nest2::i#1>(byte) 0) goto nest2::@1
  to:nest2::@return
nest2::@return: scope:[nest2]  from nest2::@3
  [30] return 
  to:@return
