From: Chris Hanson <org/chris-hanson/cph>
Date: Sat, 4 Jun 2005 23:44:05 +0000 (+0000)
Subject: Revert rule that eliminates unused pointer bindings, since the newer
X-Git-Tag: 20090517-FFI~1281
X-Git-Url: https://birchwood-abbey.net/git?a=commitdiff_plain;h=3beaab5e6bea66735546f18d5622de5183b3f8c4;p=mit-scheme.git

Revert rule that eliminates unused pointer bindings, since the newer
rule didn't catch all the interesting cases.
---

diff --git a/v7/src/star-parser/shared.scm b/v7/src/star-parser/shared.scm
index 3749af17f..c3d115f37 100644
--- a/v7/src/star-parser/shared.scm
+++ b/v7/src/star-parser/shared.scm
@@ -1,6 +1,6 @@
 #| -*-Scheme-*-
 
-$Id: shared.scm,v 1.30 2005/06/04 05:58:19 cph Exp $
+$Id: shared.scm,v 1.31 2005/06/04 23:44:05 cph Exp $
 
 Copyright 2001,2002,2003,2005 Massachusetts Institute of Technology
 
@@ -725,9 +725,6 @@ USA.
 (define (make-empty-pointers)
   (cons #f '()))
 
-(define (current-pointer pointers)
-  (car pointers))
-
 (define (current-pointer? identifier pointers)
   (memq identifier (%current-pointers pointers)))
 
@@ -817,7 +814,7 @@ USA.
 	  (operand (cadr expression))
 	  (body (caddr (car expression))))
       (let ((body (new-pointer body identifier pointers)))
-	(if (current-pointer pointers)
+	(if (= (car (count-references (list identifier) body)) 0)
 	    ;; IDENTIFIER is an alias, so don't bind it.
 	    body
 	    `((LAMBDA (,identifier) ,body) ,operand))))))