void TemplateInterpreterGenerator::trace_bytecode(Template* t) {

  {- -------------------------------------------
  (1) 
      ---------------------------------------- -}

      // Call a little run-time stub to avoid blow-up for each bytecode.
      // The run-time runtime saves the right registers, depending on
      // the tosca in-state for the given template.

      assert(Interpreter::trace_code(t->tos_in()) != NULL,
             "entry must have been generated");

  {- -------------------------------------------
  (1) 
      ---------------------------------------- -}

      __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM)
      __ andptr(rsp, -16); // align stack as required by ABI

  {- -------------------------------------------
  (1) Interpreter::trace_code() が指しているコード (= 
      TemplateInterpreterGenerator::generate_trace_code() で
      生成されたコード列のエントリポイント) を呼び出す.
      ---------------------------------------- -}

      __ call(RuntimeAddress(Interpreter::trace_code(t->tos_in())));