remove code-table slot from methods

* libguile/goops.c (scm_sys_invalidate_method_cache_x, scm_make)
  (create_standard_classes): Remove code-table slot from methods. The
  generic cache completely does its job, afaict.

* libguile/goops.h (scm_si_formals, scm_si_body, scm_si_make_procedure):
  Renumber slots.

* module/oop/goops.scm (initialize on <method>): No more code-table
  slot.

* module/oop/goops/compile.scm: Always "compile" a method, instead of
  looking for a hit in an always-empty cache.

libguile/goops.c

@@ -1911,16 +1911,11 @@ SCM_DEFINE (scm_sys_invalidate_method_cache_x, "%invalidate-method-cache!", 1, 0
 	    "")
 #define FUNC_NAME s_scm_sys_invalidate_method_cache_x
 {
-  SCM methods, n;
-  
   SCM_ASSERT (SCM_PUREGENERICP (gf), gf, SCM_ARG1, FUNC_NAME);
-  methods = SCM_SLOT (gf, scm_si_methods);
   clear_method_cache (gf);
-  for (; scm_is_pair (methods); methods = SCM_CDR (methods))
-    SCM_SET_SLOT (SCM_CAR (methods), scm_si_code_table, SCM_EOL);
-  n = SCM_SLOT (gf, scm_si_n_specialized);
-  /* The sign of n is a flag indicating rest args. */
-  SCM_SET_MCACHE_N_SPECIALIZED (SCM_GENERIC_METHOD_CACHE (gf), n);
+  /* The sign of n-specialized is a flag indicating rest args. */
+  SCM_SET_MCACHE_N_SPECIALIZED (SCM_GENERIC_METHOD_CACHE (gf),
+                                SCM_SLOT (gf, scm_si_n_specialized));
   return SCM_UNSPECIFIED;
 }
 #undef FUNC_NAME
@@ -2397,7 +2392,6 @@ SCM_DEFINE (scm_make, "make",  0, 0, 1,
 			       len - 1,
 			       SCM_BOOL_F,
 			       FUNC_NAME));
-	  SCM_SET_SLOT (z, scm_si_code_table, SCM_EOL);
 	  SCM_SET_SLOT (z, scm_si_formals,
 	    scm_i_get_keyword (k_formals,
 			       args,
@@ -2558,7 +2552,6 @@ create_standard_classes (void)
   SCM method_slots = scm_list_n (scm_from_locale_symbol ("generic-function"),
 				 scm_from_locale_symbol ("specializers"),
 				 sym_procedure,
-				 scm_from_locale_symbol ("code-table"),
 				 scm_from_locale_symbol ("formals"),
 				 scm_from_locale_symbol ("body"),
 				 scm_from_locale_symbol ("make-procedure"),

libguile/goops.h

@@ -186,10 +186,9 @@ typedef struct scm_t_method {
 #define scm_si_generic_function	 0  /* offset of gf    slot in a <method> */
 #define scm_si_specializers	 1  /* offset of spec. slot in a <method> */
 #define scm_si_procedure 	 2  /* offset of proc. slot in a <method> */
-#define scm_si_code_table	 3  /* offset of code. slot in a <method> */
-#define scm_si_formals		 4  /* offset of form. slot in a <method> */
-#define scm_si_body		 5  /* offset of body  slot in a <method> */
-#define scm_si_make_procedure	 6  /* offset of makep.slot in a <method> */
+#define scm_si_formals		 3  /* offset of form. slot in a <method> */
+#define scm_si_body		 4  /* offset of body  slot in a <method> */
+#define scm_si_make_procedure	 5  /* offset of makep.slot in a <method> */
 
 /* C interface */
 SCM_API SCM scm_class_boolean;

module/oop/goops.scm

@@ -1517,7 +1517,6 @@
   (slot-set! method 'specializers (get-keyword #:specializers initargs '()))
   (slot-set! method 'procedure
 	     (get-keyword #:procedure initargs #f))
-  (slot-set! method 'code-table '())
   (slot-set! method 'formals (get-keyword #:formals initargs '()))
   (slot-set! method 'body (get-keyword #:body initargs '()))
   (slot-set! method 'make-procedure (get-keyword #:make-procedure initargs #f)))

module/oop/goops/compile.scm

@@ -1,4 +1,4 @@
-;;;; 	Copyright (C) 1999, 2001, 2006 Free Software Foundation, Inc.
+;;;; 	Copyright (C) 1999, 2001, 2006, 2009 Free Software Foundation, Inc.
 ;;;; 
 ;;;; This library is free software; you can redistribute it and/or
 ;;;; modify it under the terms of the GNU Lesser General Public
@@ -28,32 +28,6 @@
   :no-backtrace
   )
 
-;;;
-;;; Method entries
-;;;
-
-(define code-table-lookup
-  (letrec ((check-entry (lambda (entry types)
-                          (cond
-                           ((not (pair? entry)) (and (null? types) entry))
-                           ((null? types) #f)
-                           (else
-                            (and (eq? (car entry) (car types))
-                                 (check-entry (cdr entry) (cdr types))))))))
-    (lambda (code-table types)
-      (cond ((null? code-table) #f)
-	    ((check-entry (car code-table) types))
-	    (else (code-table-lookup (cdr code-table) types))))))
-
-(define (compute-cmethod methods types)
-  (or (code-table-lookup (slot-ref (car methods) 'code-table) types)
-      (let* ((method (car methods))
-             (cmethod (compile-method methods types))
-	     (entry (append types cmethod)))
-	(slot-set! method 'code-table
-		   (cons entry (slot-ref method 'code-table)))
-	cmethod)))
-
 ;;;
 ;;; Compiling next methods into method bodies
 ;;;
@@ -70,7 +44,7 @@
 ;;; I think this whole generic application mess would benefit from a
 ;;; strict MOP.
 
-(define (compile-method methods types)
+(define (compute-cmethod methods types)
   (let ((make-procedure (slot-ref (car methods) 'make-procedure)))
     (if make-procedure
         (make-procedure