;;; -- either continuation has a funky TYPE-CHECK annotation.
;;; -- the continuations have incompatible assertions, so the new asserted type
;;; would be NIL.
-;;; -- the var's DEST has a different policy than the ARG's (think safety).
+;;; -- the VAR's DEST has a different policy than the ARG's (think safety).
;;;
;;; We change the REF to be a reference to NIL with unused value, and
;;; let it be flushed as dead code. A side effect of this substitution
(dest (continuation-dest cont)))
(when (and (eq (continuation-use cont) ref)
dest
- (not (typep dest '(or creturn exit mv-combination)))
+ (continuation-single-value-p cont)
(eq (node-home-lambda ref)
(lambda-home (lambda-var-home var)))
(member (continuation-type-check arg) '(t nil))
;;; If the function has an XEP, then we don't do anything, since we
;;; won't discover anything.
;;;
-;;; We can clear the Continuation-Reoptimize flags for arguments in
-;;; all calls corresponding to changed arguments in Call, since the
-;;; only use in IR1 optimization of the Reoptimize flag for local call
+;;; We can clear the CONTINUATION-REOPTIMIZE flags for arguments in
+;;; all calls corresponding to changed arguments in CALL, since the
+;;; only use in IR1 optimization of the REOPTIMIZE flag for local call
;;; args is right here.
(defun propagate-local-call-args (call fun)
(declare (type combination call) (type clambda fun))
;;; CONVERT-MV-BIND-TO-LET. We grab the args of LIST and make them
;;; args of the VALUES-LIST call, flushing the old argument
;;; continuation (allowing the LIST to be flushed.)
+;;;
+;;; FIXME: Thus we lose possible type assertions on (LIST ...).
(defoptimizer (values-list optimizer) ((list) node)
(let ((use (continuation-use list)))
(when (and (combination-p use)
;;; to a PROG1. This allows the computation of the additional values
;;; to become dead code.
(deftransform values ((&rest vals) * * :node node)
- (when (typep (continuation-dest (node-cont node))
- '(or creturn exit mv-combination))
+ (unless (continuation-single-value-p (node-cont node))
(give-up-ir1-transform))
(setf (node-derived-type node) *wild-type*)
(if vals