
void main()
main: scope:[main]  from
  [0] phi()
  to:main::@1
main::@1: scope:[main]  from main main::@4
  [1] idx#12 = phi( main/0, main::@4/idx#11 )
  [1] main::i#2 = phi( main/0, main::@4/main::i#1 )
  [2] if(main::i#2<5) goto main::@2
  to:main::@return
main::@return: scope:[main]  from main::@1
  [3] return 
  to:@return
main::@2: scope:[main]  from main::@1 main::@5
  [4] idx#11 = phi( main::@1/idx#12, main::@5/idx#1 )
  [4] main::j#2 = phi( main::@1/0, main::@5/main::j#1 )
  [5] if(main::j#2<5) goto main::@3
  to:main::@4
main::@4: scope:[main]  from main::@2
  [6] main::i#1 = ++ main::i#2
  to:main::@1
main::@3: scope:[main]  from main::@2
  [7] main::x#0 = main::i#2 + main::j#2
  [8] SCREEN[idx#11] = main::x#0
  [9] idx#0 = ++ idx#11
  [10] sum::a#0 = main::i#2
  [11] sum::b#0 = main::j#2
  [12] call sum
  [13] sum::return#0 = sum::return#1
  to:main::@5
main::@5: scope:[main]  from main::@3
  [14] main::y#0 = sum::return#0
  [15] SCREEN[idx#0] = main::y#0
  [16] idx#1 = ++ idx#0
  [17] main::j#1 = ++ main::j#2
  to:main::@2

char sum(char a , char b)
sum: scope:[sum]  from main::@3
  [18] sum::return#1 = sum::a#0 + sum::b#0
  to:sum::@return
sum::@return: scope:[sum]  from sum
  [19] return 
  to:@return
