return fmt.Sprintf("%x", h.Sum(nil))
}

type funcPrinter interface {
	header(f *Func)
	startBlock(b *Block, reachable bool)
	endBlock(b *Block, reachable bool)
	value(v *Value, live bool)
	startDepCycle()
	endDepCycle()
	named(n LocalSlot, vals []*Value)
}

type stringFuncPrinter struct {
	w         io.Writer
	printDead bool
}

func (p stringFuncPrinter) header(f *Func) {
	fmt.Fprint(p.w, f.Name)

	fmt.Fprint(p.w, v.LongHTML())
	io.WriteString(p.w, "</li>")
}

func (p htmlFuncPrinter) startDepCycle() {
	fmt.Fprintln(p.w, "<span class=\"depcycle\">")
}

func (p htmlFuncPrinter) endDepCycle() {
	fmt.Fprintln(p.w, "</span>")
}

func (p htmlFuncPrinter) named(n LocalSlot, vals []*Value) {
	fmt.Fprintf(p.w, "<li>name %s: ", n)
	for _, val := range vals {
		fmt.Fprintf(p.w, "%s ", val.HTML())