
void main()
main: scope:[main]  from
  [0] phi()
  to:main::@1
main::@1: scope:[main]  from main main::@3
  [1] main::b#2 = phi( main/0, main::@3/main::b#1 )
  [2] if(main::b#2==0) goto main::@3
  to:main::@2
main::@2: scope:[main]  from main::@1
  [3] if(main::b#2==1) goto main::@4
  to:main::@5
main::@4: scope:[main]  from main::@2
  [4] phi()
  to:main::@5
main::@5: scope:[main]  from main::@2 main::@4
  [5] main::$5 = phi( main::@4/'b', main::@2/'c' )
  to:main::@3
main::@3: scope:[main]  from main::@1 main::@5
  [6] main::$7 = phi( main::@1/'a', main::@5/main::$5 )
  [7] *main::SCREEN = main::$7
  [8] main::b#1 = ++ main::b#2
  [9] if(main::b#1!=3) goto main::@1
  to:main::@return
main::@return: scope:[main]  from main::@3
  [10] return 
  to:@return
