-(defun handle-nested-dynamic-extent-lvars (dx lvar)
- (let ((uses (lvar-uses lvar)))
- ;; DX value generators must end their blocks: see UPDATE-UVL-LIVE-SETS.
- ;; Uses of mupltiple-use LVARs already end their blocks, so we just need
- ;; to process uses of single-use LVARs.
- (when (node-p uses)
- (node-ends-block uses))
- ;; If this LVAR's USE is good for DX, it is either a CAST, or it
- ;; must be a regular combination whose arguments are potentially DX as well.
- (flet ((recurse (use)
- (etypecase use
- (cast
- (handle-nested-dynamic-extent-lvars dx (cast-value use)))
- (combination
- (loop for arg in (combination-args use)
- ;; deleted args show up as NIL here
- when (and arg (lvar-good-for-dx-p arg dx))
- append (handle-nested-dynamic-extent-lvars dx arg)))
- (ref
- (let* ((other (trivial-lambda-var-ref-lvar use)))
- (unless (eq other lvar)
- (handle-nested-dynamic-extent-lvars dx other)))))))
- (cons lvar
- (if (listp uses)
- (loop for use in uses
- when (use-good-for-dx-p use dx)
- nconc (recurse use))
- (when (use-good-for-dx-p uses dx)
- (recurse uses)))))))
-