
void main()
main: scope:[main]  from
  [0] phi()
  [1] call printneg
  to:main::@return
main::@return: scope:[main]  from main
  [2] return 
  to:@return

void printneg(signed char c)
printneg: scope:[printneg]  from main
  [3] *SCREEN = --4
  to:printneg::@return
printneg::@return: scope:[printneg]  from printneg
  [4] return 
  to:@return
