(local-tns (make-array local-tn-limit) :type local-tn-vector)
;; Bit-vectors used during lifetime analysis to keep track of
;; references to local TNs. When indexed by the LTN number, the
- ;; index for a TN is non-zero in Written if it is ever written in
- ;; the block, and in Live-Out if the first reference is a read.
+ ;; index for a TN is non-zero in WRITTEN if it is ever written in
+ ;; the block, and in LIVE-OUT if the first reference is a read.
(written (make-array local-tn-limit :element-type 'bit
:initial-element 0)
:type local-tn-bit-vector)
;; 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))
;; wired TNs.
(primitive-type nil :type (or primitive-type null))
;; If this TN represents a variable or constant, then this is the
- ;; corresponding Leaf.
+ ;; corresponding LEAF.
(leaf nil :type (or leaf null))
;; thread that links TNs together so that we can find them
(next nil :type (or tn null))