- (node-ends-block uses)
- (setf uses (list uses)))
- ;; If the function result is DX, so are its arguments... This
- ;; assumes that all our DX functions do not store their arguments
- ;; anywhere -- just use, and maybe return.
- (cons arg
- (loop for use in uses
- when (basic-combination-p use)
- nconc (loop for a in (basic-combination-args use)
- append (handle-nested-dynamic-extent-lvars a))))))
+ (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)))))))