@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::@2 main::@3
  [5] (byte) key#1 ← *((const byte*) DC00)
  [6] (byte~) main::$1 ← (byte) key#1 & (byte) $1f
  [7] if((byte) key#1!=(byte) 0) goto main::@2
  to:main::@3
main::@3: scope:[main]  from main::@1
  [8] if((byte~) main::$1==(byte) $1f) goto main::@1
  to:main::@2
main::@2: scope:[main]  from main::@1 main::@3
  [9] phi()
  to:main::@1
