Fix bug in load-machine-register!: If machine-register is a

floating-point register, it is not OK to ask for any alias.

diff --git a/v7/src/compiler/back/lapgn2.scm b/v7/src/compiler/back/lapgn2.scm
index a0494be9b892d47875342c70146d0b1c0dce9387..1b3823e3c8c2cd620dce3ed8cfeff70bbc5b2ecb 100644 (file)
--- a/v7/src/compiler/back/lapgn2.scm
+++ b/v7/src/compiler/back/lapgn2.scm
@@ -1,8 +1,8 @@
 #| -*-Scheme-*-
 
-$Header: /Users/cph/tmp/foo/mit-scheme/mit-scheme/v7/src/compiler/back/lapgn2.scm,v 1.19 1991/02/14 18:44:48 jinx Exp $
+$Id: lapgn2.scm,v 1.20 1993/07/01 03:06:27 gjr Exp $
 
-Copyright (c) 1987, 1988, 1989, 1990, 1991 Massachusetts Institute of Technology
+Copyright (c) 1987-1993 Massachusetts Institute of Technology
 
 This material was developed by the Scheme project at the Massachusetts
 Institute of Technology, Department of Electrical Engineering and
@@ -33,6 +33,7 @@ promotional, or sales literature without prior written consent from
 MIT in each case. |#
 
 ;;;; LAP Generator: High-Level Register Assignment
+;;; package: (compiler lap-syntaxer)
 
 (declare (usual-integrations))
 \f
@@ -346,7 +347,12 @@ MIT in each case. |#
       (if (is-alias-for-register? machine-register source-register)
          (clear-registers! machine-register)
          (let ((source-reference
-                (standard-register-reference source-register false true)))
+                (if (register-value-class=word? source-register)
+                    (standard-register-reference source-register false true)
+                    (standard-register-reference
+                     source-register
+                     (register-type source-register)
+                     false))))
            (LAP ,@(clear-registers! machine-register)
                 ,@(reference->register-transfer source-reference
                                                 machine-register))))))