X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcompiler%2Flocall.lisp;h=ae4ad080dba81e34272ceb09d17fe891dd6178ad;hb=50f728671defadb8f7b1e8691c984cb0e6aba17c;hp=a2abf54c440137efaf7aef56198199e226f44a0b;hpb=2489ac3021325890a98886110ab3055fa990a850;p=sbcl.git

diff --git a/src/compiler/locall.lisp b/src/compiler/locall.lisp
index a2abf54..ae4ad08 100644
--- a/src/compiler/locall.lisp
+++ b/src/compiler/locall.lisp
@@ -138,7 +138,7 @@
 	       `(declare (ignore ,n-supplied))
 	       `(%verify-arg-count ,n-supplied ,nargs))
 	  (locally
-	    (declare (optimize (let-convertion 3)))
+	    (declare (optimize (merge-tail-calls 3)))
 	    (%funcall ,fun ,@temps)))))
     (optional-dispatch
      (let* ((min (optional-dispatch-min-args fun))
@@ -166,11 +166,7 @@
 		       `(multiple-value-bind (,n-context ,n-count)
 			    (%more-arg-context ,n-supplied ,max)
 			  (locally
-			    ;; KLUDGE: As above, we're trying to
-			    ;; enable tail recursion optimization and
-			    ;; any other effects of this declaration
-			    ;; are accidental. -- WHN 2002-07-08
-			    (declare (optimize (speed 2) (debug 1)))
+			    (declare (optimize (merge-tail-calls 3)))
 			    (%funcall ,more ,@temps ,n-context ,n-count)))))))
 	     (t
 	      (%arg-count-error ,n-supplied)))))))))
@@ -948,12 +944,21 @@
     (cond ((not return))
 	  ((or next-block call-return)
 	   (unless (block-delete-p (node-block return))
+             (when (and (node-tail-p call)
+                        call-return
+                        (not (eq (node-cont call)
+                                 (return-result call-return))))
+               ;; We do not care to give a meaningful continuation to
+               ;; a tail combination, but here we need it.
+               (delete-continuation-use call)
+               (add-continuation-use call (return-result call-return)))
 	     (move-return-uses fun call
 			       (or next-block (node-block call-return)))))
 	  (t
 	   (aver (node-tail-p call))
 	   (setf (lambda-return call-fun) return)
-	   (setf (return-lambda return) call-fun))))
+	   (setf (return-lambda return) call-fun)
+           (setf (lambda-return fun) nil))))
   (move-let-call-cont fun)
   (values))
 
@@ -982,9 +987,6 @@
 
 ;;; Are there any declarations in force to say CLAMBDA shouldn't be
 ;;; LET converted?
-(define-optimization-quality let-convertion
-    (if (<= debug speed) 3 0)
-  ("off" "maybe" "on" "on"))
 (defun declarations-suppress-let-conversion-p (clambda)
   ;; From the user's point of view, LET-converting something that
   ;; has a name is inlining it. (The user can't see what we're doing