From: Guillermo J. Rozas <edu/mit/csail/zurich/gjr>
Date: Wed, 23 Nov 1994 23:15:26 +0000 (+0000)
Subject: Undo change to rtlgen/available-registers that made the raw
X-Git-Tag: 20090517-FFI~6974
X-Git-Url: https://birchwood-abbey.net/git?a=commitdiff_plain;h=778a0333e1a2987965faea42172ae9ab1914b172;p=mit-scheme.git

Undo change to rtlgen/available-registers that made the raw
continuation register available for allocation.
---

diff --git a/v8/src/compiler/midend/rtlgen.scm b/v8/src/compiler/midend/rtlgen.scm
index 1f8a82a94..89db7944e 100644
--- a/v8/src/compiler/midend/rtlgen.scm
+++ b/v8/src/compiler/midend/rtlgen.scm
@@ -1,6 +1,6 @@
 #| -*-Scheme-*-
 
-$Id: rtlgen.scm,v 1.4 1994/11/23 21:31:58 adams Exp $
+$Id: rtlgen.scm,v 1.5 1994/11/23 23:15:26 gjr Exp $
 
 Copyright (c) 1994 Massachusetts Institute of Technology
 
@@ -885,22 +885,26 @@ MIT in each case. |#
 			       arg-regs))))
 |#
 #|
+;; If the incoming raw-continuation register is made available,
+;; other code below that implicitly assumes that it is preserved
+;; must be changed.  See rtlgen.scm.contin (part of the way there).
+
 (define (rtlgen/available-registers available)
   (let ((arg-regs (rtlgen/argument-registers)))
     ;; Order is important!
     (append arg-regs
-	    (eq-set-difference (if (rtlgen/cont-in-stack?)
-				   available
-				   (delq (rtl:register-number
-					  (rtlgen/reference-to-cont))
-					 available))
+	    (eq-set-difference available
 			       arg-regs))))
 |#
 (define (rtlgen/available-registers available)
   (let ((arg-regs (rtlgen/argument-registers)))
     ;; Order is important!
     (append arg-regs
-	    (eq-set-difference available
+	    (eq-set-difference (if (rtlgen/cont-in-stack?)
+				   available
+				   (delq (rtl:register-number
+					  (rtlgen/reference-to-cont))
+					 available))
 			       arg-regs))))
 
 (define (rtlgen/number-of-argument-registers)