(setf (lvar-dynamic-extent (cdr cell)) cleanup)))))
(values))
+;;; Called after a transform has been applied to CALL: if the call has a DX
+;;; result, propagate the DXness to the new functional as well.
+;;;
+;;; This is needed in case an earlier call to LOCALL-ANALYZE-COMPONENT
+;;; collected DX information before the transformation, in which case a later
+;;; call to LOCALL-ANALYZE-COMPONENT would not pick up the DX declaration
+;;; again, since the call has already been converted. (In other words, work
+;;; around the fact that optimization iterates, and locall analysis may have
+;;; already run by the time we are able to transform something.)
+(defun maybe-propagate-dynamic-extent (call fun)
+ (when (lambda-p fun)
+ (let* ((lvar (combination-lvar call))
+ (cleanup (or (and lvar (lvar-dynamic-extent lvar))
+ (return-from maybe-propagate-dynamic-extent)))
+ (ret (lambda-return fun))
+ (res (if ret
+ (return-result ret)
+ (return-from maybe-propagate-dynamic-extent)))
+ (dx (car (rassoc lvar (cleanup-info cleanup) :test #'eq)))
+ (new-dx-lvars (if (and dx res)
+ (handle-nested-dynamic-extent-lvars dx res)
+ (return-from maybe-propagate-dynamic-extent))))
+ (when new-dx-lvars
+ ;; This builds on what RECOGNIZE-DYNAMIC-EXTENT-LVARS does above.
+ (aver (eq call (block-last (node-block call))))
+ (dolist (cell new-dx-lvars)
+ (let ((lvar (cdr cell)))
+ (aver (not (lvar-dynamic-extent lvar)))
+ (push cell (cleanup-info cleanup))
+ (setf (lvar-dynamic-extent (cdr cell)) cleanup)))))))
+
;;; This function handles merging the tail sets if CALL is potentially
;;; tail-recursive, and is a call to a function with a different
;;; TAIL-SET than CALL's FUN. This must be called whenever we alter
projects / sbcl.git / blobdiff