
void main()
main: scope:[main]  from
  [0] phi()
  to:main::@1
main::@1: scope:[main]  from main main::@2
  [1] main::screen#2 = phi( main/(char *) 1024, main::@2/main::screen#1 )
  [2] if(main::screen#2<$400+$3e8) goto main::@2
  to:main::@return
main::@return: scope:[main]  from main::@1
  [3] return 
  to:@return
main::@2: scope:[main]  from main::@1
  [4] *main::screen#2 = '*'
  [5] main::screen#1 = ++ main::screen#2
  to:main::@1
