@begin: scope:[]  from
  [0] phi()
  to:@1
@1: scope:[]  from @begin
  [1] phi()
  [2] call main 
  to:@end
@end: scope:[]  from @1
  [3] phi()

(void()) main()
main: scope:[main]  from @1
  asm { lda#'1' pha lda#'2' pha lda#'3' pha  }
  [5] call peek_stack 
  to:main::@1
main::@1: scope:[main]  from main
  asm { pla pla pla  }
  to:main::@return
main::@return: scope:[main]  from main::@1
  [7] return 
  to:@return

(void()) peek_stack()
peek_stack: scope:[peek_stack]  from main
  asm { tsx ldaSTACK,x staSCREEN ldaSTACK+1,x staSCREEN+1 ldaSTACK+2,x staSCREEN+2  }
  to:peek_stack::@return
peek_stack::@return: scope:[peek_stack]  from peek_stack
  [9] return 
  to:@return
