
void main()
main: scope:[main]  from
  [0] phi()
  to:main::@1
main::@1: scope:[main]  from main main::@4
  [1] main::lo#2 = phi( main/0, main::@4/main::lo#1 )
  [2] if(main::lo#2<$64) 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::@3
  [4] main::hi#2 = phi( main::@1/0, main::@3/main::hi#1 )
  [5] if(main::hi#2<$64) goto main::@3
  to:main::@4
main::@4: scope:[main]  from main::@2
  [6] main::lo#1 = ++ main::lo#2
  to:main::@1
main::@3: scope:[main]  from main::@2
  [7] main::i#0 = main::hi#2 w= main::lo#2
  [8] *main::SCREEN = main::i#0
  [9] main::hi#1 = ++ main::hi#2
  to:main::@2
