;; CONSTANT-TNs are non-packed TNs that represent constants.
;; :CONSTANT TNs may eventually be converted to :CACHED-CONSTANT
;; normal TNs.
+ ;;
+ ;; FIXME: What is :CACHED-CONSTANT?
(normal-tns nil :type (or tn null))
(restricted-tns nil :type (or tn null))
(wired-tns nil :type (or tn null))