From: Henry M. Wu <edu/mit/csail/zurich/mhwu>
Date: Tue, 10 May 1988 00:38:45 +0000 (+0000)
Subject: CHAR/STRING open-coding, bug fix
X-Git-Tag: 20090517-FFI~12768
X-Git-Url: https://birchwood-abbey.net/git?a=commitdiff_plain;h=fbb61f31146a5c2ce3bea8f4f2d1f86ffd461e06;p=mit-scheme.git

CHAR/STRING open-coding, bug fix
---

diff --git a/v7/src/compiler/machines/bobcat/rules1.scm b/v7/src/compiler/machines/bobcat/rules1.scm
index 3670cd43d..fc8a2442a 100644
--- a/v7/src/compiler/machines/bobcat/rules1.scm
+++ b/v7/src/compiler/machines/bobcat/rules1.scm
@@ -1,6 +1,6 @@
 #| -*-Scheme-*-
 
-$Header: /Users/cph/tmp/foo/mit-scheme/mit-scheme/v7/src/compiler/machines/bobcat/rules1.scm,v 4.8 1988/05/10 00:10:33 mhwu Exp $
+$Header: /Users/cph/tmp/foo/mit-scheme/mit-scheme/v7/src/compiler/machines/bobcat/rules1.scm,v 4.9 1988/05/10 00:38:45 mhwu Exp $
 
 Copyright (c) 1987 Massachusetts Institute of Technology
 
@@ -293,14 +293,15 @@ MIT in each case. |#
 (define-rule statement
   (ASSIGN (REGISTER (? target)) (CHAR->ASCII (REGISTER (? source))))
   (QUALIFIER (pseudo-register? target))
-  (let ((machine-register
-	 (if (machine-register? source)
-	     source
-	     (register-alias source false))))
+  (let ((machine-register (if (machine-register? source)
+			      source
+			      (register-alias source false))))
     (if machine-register
-	(LAP (BFEXTU ,(register-reference source)
-		     (& 0) (& 8)
-		     ,(register-reference (allocate-alias-register! target 'DATA))))
+	(let ((source-ref (register-reference machine-register)))
+	  (delete-dead-registers!)
+	  (let ((target-ref
+		 (register-reference (allocate-alias-register! target 'DATA))))
+	    (LAP (BFEXTU ,source-ref (& 0) (& 8) ,target-ref))))
 	(byte-offset->register
 	 (indirect-char/ascii-reference! regnum:regs-pointer
 					 (pseudo-register-offset source))