
void main()
main: scope:[main]  from
  [0] phi()
  to:main::@1
main::@1: scope:[main]  from main main::@5
  [1] main::COLS#2 = phi( main/0, main::@5/main::COLS#1 )
  [2] if(main::COLS#2<2) 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::$1 = main::COLS#2 << 2
  [5] main::$2 = SCREEN + main::$1
  [6] main::sc#0 = main::$2 + 2
  to:main::@3
main::@3: scope:[main]  from main::@2 main::@4
  [7] main::i#2 = phi( main::@2/0, main::@4/main::i#1 )
  [8] if(main::i#2<4) goto main::@4
  to:main::@5
main::@5: scope:[main]  from main::@3
  [9] main::COLS#1 = ++ main::COLS#2
  to:main::@1
main::@4: scope:[main]  from main::@3
  [10] main::sc#0[main::i#2] = main::COLS#2
  [11] main::i#1 = ++ main::i#2
  to:main::@3
