
void main()
main: scope:[main]  from
  [0] phi()
  to:main::@1
main::@1: scope:[main]  from main main::@2
  [1] main::i#2 = phi( main/0, main::@2/main::i#1 )
  [1] main::b#2 = phi( main/0, main::@2/main::b#1 )
  [2] sum::b#0 = main::b#2
  [3] call sum
  [4] sum::return#0 = sum::return#1
  to:main::@2
main::@2: scope:[main]  from main::@1
  [5] main::$0 = sum::return#0
  [6] SCREEN[main::i#2] = main::$0
  [7] main::i#1 = ++ main::i#2
  [8] main::b#1 = ++ main::b#2
  [9] if(main::b#1!=$b) goto main::@1
  to:main::@return
main::@return: scope:[main]  from main::@2
  [10] return 
  to:@return

char sum(char a , char b)
sum: scope:[sum]  from main::@1
  [11] sum::return#1 = a + sum::b#0
  to:sum::@return
sum::@return: scope:[sum]  from sum
  [12] return 
  to:@return
