1) processing a function for decoration

	int x
	float y

	a. Build symtab to use for two reasons

	symtab = new_symtab()
	slot = 0;
	insert(symtab, "int", "x", slot++)
	insert(symtab, "float", "y", slot++)

	reason 1: convert identifier nodes into var nodes

	an identifier looks like "x"
	a var node looks like { "var", slotnum }

	(type, slot, table) = id_info("x")
	e.g. type = "int", slot = 0, table = "local"
	varnode = make_varnode(slot, table)
	replace identifier node with varnode
	free identifier node

	
	reason 2: create the template for the stack frame
	
	num_vars = slot;
	template = malloc( num_vars * sizeof(struct var_slot) )
	(each  var_slot has a type and value )

	foreach element in the hastable, 
        	(type, slot) = each(ht)

	template[slot] = type

	attach template to the function where the varlist had been
	record slot in the function

	discard hashtab


	NOW when you execute the function:

		clone template (using the template and the size)
		(voila : a stackframe)

		
struct node *new_var_node(slot){

	

	Blocks


	int i;

	f()
	{
		int	i;

		for(){
			int i
		}
	}