
void main()
main: scope:[main]  from
  [0] phi()
  [1] call print 
  to:main::@1
main::@1: scope:[main]  from main
  [2] phi()
  [3] call print 
  to:main::@2
main::@2: scope:[main]  from main::@1
  [4] phi()
  [5] call print 
  to:main::@return
main::@return: scope:[main]  from main::@2
  [6] return 
  to:@return

void print()
print: scope:[print]  from main main::@1 main::@2
  [7] idx#13 = phi( main/0, main::@1/idx#14, main::@2/idx#14 )
  [8] SCREEN[idx#13] = '.'
  [9] idx#14 = ++ idx#13
  to:print::@return
print::@return: scope:[print]  from print
  [10] return 
  to:@return
