From: Chris Hanson <org/chris-hanson/cph>
Date: Thu, 11 Jun 1987 20:44:20 +0000 (+0000)
Subject: Add `need-registers!' operation.
X-Git-Tag: 20090517-FFI~13396
X-Git-Url: https://birchwood-abbey.net/git?a=commitdiff_plain;h=caf37fd9fc986824818c2a935a992c4fe5853b13;p=mit-scheme.git

Add `need-registers!' operation.
---

diff --git a/v7/src/compiler/back/lapgn1.scm b/v7/src/compiler/back/lapgn1.scm
index 6e679a4bc..eff72f573 100644
--- a/v7/src/compiler/back/lapgn1.scm
+++ b/v7/src/compiler/back/lapgn1.scm
@@ -1,6 +1,6 @@
 #| -*-Scheme-*-
 
-$Header: /Users/cph/tmp/foo/mit-scheme/mit-scheme/v7/src/compiler/back/lapgn1.scm,v 1.35 1987/05/29 17:57:40 cph Exp $
+$Header: /Users/cph/tmp/foo/mit-scheme/mit-scheme/v7/src/compiler/back/lapgn1.scm,v 1.36 1987/06/11 20:44:20 cph Exp $
 
 Copyright (c) 1987 Massachusetts Institute of Technology
 
@@ -172,6 +172,10 @@ MIT in each case. |#
 (define-integrable (need-register! register)
   (set! *needed-registers* (cons register *needed-registers*)))
 
+(define-integrable (need-registers! registers)
+  ;; **** Assume EQ? works on registers here. ****
+  (set! *needed-registers* (eq-set-union registers *needed-registers*)))
+
 (define (maybe-need-register! register)
   (if register (need-register! register))
   register)