From 003e457294aeaba117e745aa1790e5a2c655877d Mon Sep 17 00:00:00 2001
From: wlott <wlott>
Date: Mon, 26 Nov 1990 23:07:01 +0000
Subject: [PATCH] Added a ``features'' slot to the backend structure.

---
 compiler/backend.lisp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/compiler/backend.lisp b/compiler/backend.lisp
index fef4125c9..6d8c46316 100644
--- a/compiler/backend.lisp
+++ b/compiler/backend.lisp
@@ -20,7 +20,7 @@
 	   backend-register-save-penalty backend-byte-order
 	   backend-any-primitive-type backend-info-environment
 	   backend-instruction-formats backend-instruction-flavors
-	   backend-special-arg-types
+	   backend-special-arg-types backend-features
 
 	   ;; The various backends need to call these support routines
 	   make-stack-pointer-tn primitive-type primitive-type-of))
@@ -168,6 +168,9 @@
   (instruction-flavors (make-hash-table :test #'equal) :type hash-table)
   (special-arg-types (make-hash-table :test #'eq) :type hash-table)
 
+  ;; The backend specific features list, if any.
+  (features nil :type list)
+
   . #.(mapcar #'(lambda (slot)
 		  `(,slot nil :type (or null function)))
 	      (sort (copy-list vm-support-routines)
-- 
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