@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()
  [5] call ln 
  to:main::@1
main::@1: scope:[main]  from main
  [6] phi()
  [7] call ln 
  to:main::@2
main::@2: scope:[main]  from main::@1
  [8] phi()
  [9] call ln 
  to:main::@3
main::@3: scope:[main]  from main::@2
  [10] *((const byte*) SCREEN#0) ← (byte) line#13
  [11] *((const byte*) SCREEN#0+(byte) $28) ← (byte) line#13
  to:main::@return
main::@return: scope:[main]  from main::@3
  [12] return 
  to:@return
ln: scope:[ln]  from main main::@1 main::@2
  [13] (byte) line#12 ← phi( main/(byte) $40 main::@1/(byte) line#13 main::@2/(byte) line#13 )
  [14] (byte) line#13 ← (byte) line#12 + (byte) 2
  to:ln::@return
ln::@return: scope:[ln]  from ln
  [15] return 
  to:@return
