From 26c0c7587e6f522e32a48b6604a4d96c7002af85 Mon Sep 17 00:00:00 2001
From: dtc <dtc>
Date: Tue, 24 Feb 1998 19:14:04 +0000
Subject: [PATCH] Have the aref derive-type optimizer check for exactly one
 node continuation use before asserting the type.

---
 compiler/array-tran.lisp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/compiler/array-tran.lisp b/compiler/array-tran.lisp
index ba8987e1c..10f360cc8 100644
--- a/compiler/array-tran.lisp
+++ b/compiler/array-tran.lisp
@@ -5,7 +5,7 @@
 ;;; Carnegie Mellon University, and has been placed in the public domain.
 ;;;
 (ext:file-comment
-  "$Header: /Volumes/share2/src/cmucl/cvs2git/cvsroot/src/compiler/array-tran.lisp,v 1.24 1998/02/13 16:09:48 dtc Exp $")
+  "$Header: /Volumes/share2/src/cmucl/cvs2git/cvsroot/src/compiler/array-tran.lisp,v 1.25 1998/02/24 19:14:04 dtc Exp $")
 ;;;
 ;;; **********************************************************************
 ;;;
@@ -85,7 +85,7 @@
   (assert-array-rank array (length indices))
   ;; If the node continuation has a single use then assert its type.
   (let ((cont (node-cont node)))
-    (unless (rest (find-uses cont))
+    (when (= (length (find-uses cont)) 1)
       (assert-continuation-type cont (extract-element-type array))))
   (extract-upgraded-element-type array))
 
-- 
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