
void main()
main: scope:[main]  from
  [0] phi()
  to:main::@1
main::@1: scope:[main]  from main main::@2
  [1] idx#17 = phi( main/0, main::@2/idx#14 )
  [1] main::c#2 = phi( main/0, main::@2/main::c#1 )
  [2] out2::c#0 = main::c#2
  [3] call out2
  to:main::@2
main::@2: scope:[main]  from main::@1
  [4] main::c#1 = ++ main::c#2
  [5] if(main::c#1!=$28) goto main::@1
  to:main::@return
main::@return: scope:[main]  from main::@2
  [6] return 
  to:@return

void out2(char c)
out2: scope:[out2]  from main::@1
  [7] out::c#0 = out2::c#0
  [8] call out
  to:out2::@return
out2::@return: scope:[out2]  from out2
  [9] return 
  to:@return

void out(char c)
out: scope:[out]  from out2
  [10] idx#14 = ++ idx#17
  [11] SCREEN[idx#14] = out::c#0
  to:out::@return
out::@return: scope:[out]  from out
  [12] return 
  to:@return
