Autoload more carefully from Lisp. Follow aliases for function properties.

* lisp/subr.el (autoloadp): New function.
(symbol-file): Use it.
(function-get): New function.
* lisp/emacs-lisp/macroexp.el (macroexp--expand-all): Use function-get and
autoload-do-load.
* lisp/emacs-lisp/lisp-mode.el (lisp-font-lock-syntactic-face-function)
(lisp-indent-function):
* lisp/emacs-lisp/gv.el (gv-get):
* lisp/emacs-lisp/edebug.el (get-edebug-spec, edebug-basic-spec):
* lisp/emacs-lisp/byte-opt.el (byte-optimize-form):
* lisp/emacs-lisp/bytecomp.el (byte-compile-arglist-warn):
* lisp/emacs-lisp/autoload.el (make-autoload, autoload-print-form):
Use function-get.
* lisp/emacs-lisp/cl.el: Don't propagate function properties any more.

* src/eval.c (Fautoload_do_load): Rename from do_autoload, export to Lisp,
add argument, tune behavior, and adjust all callers.

* lisp/speedbar.el (speedbar-add-localized-speedbar-support):
* lisp/emacs-lisp/disass.el (disassemble-internal):
* lisp/desktop.el (desktop-load-file):
* lisp/help-fns.el (help-function-arglist, find-lisp-object-file-name)
(describe-function-1):
* lisp/emacs-lisp/find-func.el (find-function-noselect):
* lisp/emacs-lisp/elp.el (elp-instrument-function):
* lisp/emacs-lisp/advice.el (ad-has-proper-definition):
* lisp/apropos.el (apropos-safe-documentation, apropos-macrop):
* lisp/emacs-lisp/debug.el (debug-on-entry):
* lisp/emacs-lisp/cl-macs.el (cl-compiler-macroexpand):
* lisp/emacs-lisp/byte-opt.el (byte-compile-inline-expand):
* lisp/calc/calc.el (name): Use autoloadp & autoload-do-load.

22 files changed, 126 insertions, 88 deletions

diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index 1d4baa8b054..40cded6f9cc 100644
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,3 +1,37 @@
+2012-07-26  Stefan Monnier  <monnier@iro.umontreal.ca>
+
+	Autoload from Lisp with more care.  Follow aliases when looking for
+	function properties.
+	* subr.el (autoloadp): New function.
+	(symbol-file): Use it.
+	(function-get): New function.
+	* emacs-lisp/macroexp.el (macroexp--expand-all): Use function-get and
+	autoload-do-load.
+	* emacs-lisp/lisp-mode.el (lisp-font-lock-syntactic-face-function)
+	(lisp-indent-function):
+	* emacs-lisp/gv.el (gv-get):
+	* emacs-lisp/edebug.el (get-edebug-spec, edebug-basic-spec):
+	* emacs-lisp/byte-opt.el (byte-optimize-form):
+	* emacs-lisp/bytecomp.el (byte-compile-arglist-warn):
+	* emacs-lisp/autoload.el (make-autoload, autoload-print-form):
+	Use function-get.
+	* emacs-lisp/cl.el: Don't propagate function properties any more.
+
+	* speedbar.el (speedbar-add-localized-speedbar-support):
+	* emacs-lisp/disass.el (disassemble-internal):
+	* desktop.el (desktop-load-file):
+	* help-fns.el (help-function-arglist, find-lisp-object-file-name)
+	(describe-function-1):
+	* emacs-lisp/find-func.el (find-function-noselect):
+	* emacs-lisp/elp.el (elp-instrument-function):
+	* emacs-lisp/advice.el (ad-has-proper-definition):
+	* apropos.el (apropos-safe-documentation, apropos-macrop):
+	* emacs-lisp/debug.el (debug-on-entry):
+	* emacs-lisp/cl-macs.el (cl-compiler-macroexpand):
+	* emacs-lisp/byte-opt.el (byte-compile-inline-expand):
+	* calc/calc.el (name): Use autoloadp & autoload-do-load.
+
+
 2012-07-25  Alp Aker  <alp.tekin.aker@gmail.com>
 
 	* international/mule-cmds.el (ucs-insert): Mark it as an obsolete
diff --git a/lisp/apropos.el b/lisp/apropos.el
index e1c3e06752d..6c6e3b325e8 100644
--- a/lisp/apropos.el
+++ b/lisp/apropos.el
@@ -980,7 +980,7 @@ Will return nil instead."
   (setq function (if (byte-code-function-p function)
 		     (if (> (length function) 4)
 			 (aref function 4))
-		   (if (eq (car-safe function) 'autoload)
+		   (if (autoloadp function)
 		       (nth 2 function)
 		     (if (eq (car-safe function) 'lambda)
 			 (if (stringp (nth 2 function))
@@ -1114,7 +1114,7 @@ If non-nil TEXT is a string that will be printed as a heading."
        (consp (setq symbol
 		    (symbol-function symbol)))
        (or (eq (car symbol) 'macro)
-	   (if (eq (car symbol) 'autoload)
+	   (if (autoloadp symbol)
 	       (memq (nth 4 symbol)
 		     '(macro t))))))
 
diff --git a/lisp/calc/calc.el b/lisp/calc/calc.el
index 4d64209dd36..7fb9148535a 100644
--- a/lisp/calc/calc.el
+++ b/lisp/calc/calc.el
@@ -914,7 +914,7 @@ Used by `calc-user-invocation'.")
 
 ;; Set up the autoloading linkage.
 (let ((name (and (fboundp 'calc-dispatch)
-                 (eq (car-safe (symbol-function 'calc-dispatch)) 'autoload)
+                 (autoloadp (symbol-function 'calc-dispatch))
                  (nth 1 (symbol-function 'calc-dispatch))))
       (p load-path))
 
diff --git a/lisp/desktop.el b/lisp/desktop.el
index 2c2106e18b7..a873a6b63bf 100644
--- a/lisp/desktop.el
+++ b/lisp/desktop.el
@@ -1119,11 +1119,8 @@ directory DIRNAME."
 
 (defun desktop-load-file (function)
   "Load the file where auto loaded FUNCTION is defined."
-  (when function
-    (let ((fcell (and (fboundp function) (symbol-function function))))
-      (when (and (listp fcell)
-                 (eq 'autoload (car fcell)))
-        (load (cadr fcell))))))
+  (when (fboundp function)
+    (autoload-do-load (symbol-function function) function)))
 
 ;; ----------------------------------------------------------------------------
 ;; Create a buffer, load its file, set its mode, ...;
diff --git a/lisp/emacs-lisp/advice.el b/lisp/emacs-lisp/advice.el
index 09dde2c1c17..cac76d2bce1 100644
--- a/lisp/emacs-lisp/advice.el
+++ b/lisp/emacs-lisp/advice.el
@@ -2542,7 +2542,7 @@ definition (see the code for `documentation')."
 For that it has to be fbound with a non-autoload definition."
   (and (symbolp function)
        (fboundp function)
-       (not (eq (car-safe (symbol-function function)) 'autoload))))
+       (not (autoloadp (symbol-function function)))))
 
 ;; The following two are necessary for the sake of packages such as
 ;; ange-ftp which redefine functions via fcell indirection:
diff --git a/lisp/emacs-lisp/autoload.el b/lisp/emacs-lisp/autoload.el
index 1bdd6d8fc4b..3fc185dda25 100644
--- a/lisp/emacs-lisp/autoload.el
+++ b/lisp/emacs-lisp/autoload.el
@@ -163,23 +163,23 @@ expression, in which case we want to handle forms differently."
                      ((or `define-generic-mode `define-derived-mode
                           `define-compilation-mode) nil)
                      (_ t)))
-	     (body (nthcdr (or (get car 'doc-string-elt) 3) form))
+	     (body (nthcdr (or (function-get car 'doc-string-elt) 3) form))
 	     (doc (if (stringp (car body)) (pop body))))
         ;; Add the usage form at the end where describe-function-1
         ;; can recover it.
 	(when (listp args) (setq doc (help-add-fundoc-usage doc args)))
         ;; `define-generic-mode' quotes the name, so take care of that
-        (list 'autoload (if (listp name) name (list 'quote name))
-              file doc
-              (or (and (memq car '(define-skeleton define-derived-mode
-                                    define-generic-mode
-                                    easy-mmode-define-global-mode
-                                    define-global-minor-mode
-                                    define-globalized-minor-mode
-                                    easy-mmode-define-minor-mode
-                                    define-minor-mode)) t)
-                  (eq (car-safe (car body)) 'interactive))
-              (if macrop (list 'quote 'macro) nil))))
+        `(autoload ,(if (listp name) name (list 'quote name))
+           ,file ,doc
+           ,(or (and (memq car '(define-skeleton define-derived-mode
+                                  define-generic-mode
+                                  easy-mmode-define-global-mode
+                                  define-global-minor-mode
+                                  define-globalized-minor-mode
+                                  easy-mmode-define-minor-mode
+                                  define-minor-mode)) t)
+                (eq (car-safe (car body)) 'interactive))
+           ,(if macrop ''macro nil))))
 
      ;; For defclass forms, use `eieio-defclass-autoload'.
      ((eq car 'defclass)
@@ -277,7 +277,7 @@ put the output in."
    ;; Symbols at the toplevel are meaningless.
    ((symbolp form) nil)
    (t
-    (let ((doc-string-elt (get (car-safe form) 'doc-string-elt))
+    (let ((doc-string-elt (function-get (car-safe form) 'doc-string-elt))
 	  (outbuf autoload-print-form-outbuf))
       (if (and doc-string-elt (stringp (nth doc-string-elt form)))
 	  ;; We need to hack the printing because the
@@ -356,7 +356,7 @@ not be relied upon."
   "Insert the section-header line,
 which lists the file name and which functions are in it, etc."
   (insert generate-autoload-section-header)
-  (prin1 (list 'autoloads autoloads load-name file time)
+  (prin1 `(autoloads ,autoloads ,load-name ,file ,time)
 	 outbuf)
   (terpri outbuf)
   ;; Break that line at spaces, to avoid very long lines.
diff --git a/lisp/emacs-lisp/byte-opt.el b/lisp/emacs-lisp/byte-opt.el
index 5a3fd7dddb1..a4c3e8aac4e 100644
--- a/lisp/emacs-lisp/byte-opt.el
+++ b/lisp/emacs-lisp/byte-opt.el
@@ -249,8 +249,8 @@
   (let* ((name (car form))
          (localfn (cdr (assq name byte-compile-function-environment)))
 	 (fn (or localfn (and (fboundp name) (symbol-function name)))))
-    (when (and (consp fn) (eq (car fn) 'autoload))
-      (load (nth 1 fn))
+    (when (autoloadp fn)
+      (autoload-do-load fn)
       (setq fn (or (and (fboundp name) (symbol-function name))
                    (cdr (assq name byte-compile-function-environment)))))
     (pcase fn
@@ -586,10 +586,11 @@
   (let (opt new)
     (if (and (consp form)
 	     (symbolp (car form))
-	     (or (and for-effect
-		      ;; we don't have any of these yet, but we might.
-		      (setq opt (get (car form) 'byte-for-effect-optimizer)))
-		 (setq opt (get (car form) 'byte-optimizer)))
+	     (or ;; (and for-effect
+		 ;;      ;; We don't have any of these yet, but we might.
+		 ;;      (setq opt (get (car form)
+                 ;;                     'byte-for-effect-optimizer)))
+		 (setq opt (function-get (car form) 'byte-optimizer)))
 	     (not (eq form (setq new (funcall opt form)))))
 	(progn
 ;;	  (if (equal form new) (error "bogus optimizer -- %s" opt))
diff --git a/lisp/emacs-lisp/bytecomp.el b/lisp/emacs-lisp/bytecomp.el
index 97d7ab924ed..e5df8dd112c 100644
--- a/lisp/emacs-lisp/bytecomp.el
+++ b/lisp/emacs-lisp/bytecomp.el
@@ -1355,7 +1355,7 @@ extra args."
 	    nums sig min max)
 	(when calls
           (when (and (symbolp name)
-                     (eq (get name 'byte-optimizer)
+                     (eq (function-get name 'byte-optimizer)
                          'byte-compile-inline-expand))
             (byte-compile-warn "defsubst `%s' was used before it was defined"
 		       name))
diff --git a/lisp/emacs-lisp/cl-macs.el b/lisp/emacs-lisp/cl-macs.el
index 70d907a14c1..00ba6b9e0d0 100644
--- a/lisp/emacs-lisp/cl-macs.el
+++ b/lisp/emacs-lisp/cl-macs.el
@@ -2420,8 +2420,8 @@ and then returning foo."
 	(while (and (symbolp func)
 		    (not (setq handler (get func 'compiler-macro)))
 		    (fboundp func)
-		    (or (not (eq (car-safe (symbol-function func)) 'autoload))
-			(load (nth 1 (symbol-function func)))))
+		    (or (not (autoloadp (symbol-function func)))
+			(autoload-do-load (symbol-function func) func)))
 	  (setq func (symbol-function func)))
 	(and handler
 	     (not (eq form (setq form (apply handler form (cdr form))))))))
diff --git a/lisp/emacs-lisp/cl.el b/lisp/emacs-lisp/cl.el
index 32cf1670744..8174de786c7 100644
--- a/lisp/emacs-lisp/cl.el
+++ b/lisp/emacs-lisp/cl.el
@@ -320,16 +320,7 @@
                ))
   (let ((new (if (consp fun) (prog1 (cdr fun) (setq fun (car fun)))
                (intern (format "cl-%s" fun)))))
-    (defalias fun new)
-    ;; If `cl-foo' is declare inline, then make `foo' inline as well, and
-    ;; similarly.  Same for edebug specifications, indent rules and
-    ;; doc-string position.
-    ;; FIXME: For most of them, we should instead follow aliases
-    ;; where applicable.
-    (dolist (prop '(byte-optimizer doc-string-elt edebug-form-spec
-                    lisp-indent-function))
-      (if (get new prop)
-        (put fun prop (get new prop))))))
+    (defalias fun new)))
 
 ;;; Features provided a bit differently in Elisp.
 
diff --git a/lisp/emacs-lisp/debug.el b/lisp/emacs-lisp/debug.el
index b0813aebef6..7bc93a19d1a 100644
--- a/lisp/emacs-lisp/debug.el
+++ b/lisp/emacs-lisp/debug.el
@@ -805,9 +805,9 @@ Redefining FUNCTION also cancels it."
 			,(interactive-form (symbol-function function))
 			(apply ',(symbol-function function)
 			       debug-on-entry-args)))
-    (when (eq (car-safe (symbol-function function)) 'autoload)
+    (when (autoloadp (symbol-function function))
       ;; The function is autoloaded.  Load its real definition.
-      (load (cadr (symbol-function function)) nil noninteractive nil t))
+      (autoload-do-load (symbol-function function) function))
     (when (or (not (consp (symbol-function function)))
 	      (and (eq (car (symbol-function function)) 'macro)
 		   (not (consp (cdr (symbol-function function))))))
diff --git a/lisp/emacs-lisp/disass.el b/lisp/emacs-lisp/disass.el
index ba720b42868..206166bc77a 100644
--- a/lisp/emacs-lisp/disass.el
+++ b/lisp/emacs-lisp/disass.el
@@ -80,14 +80,10 @@ redefine OBJECT if it is a symbol."
 	    obj (symbol-function obj)))
     (if (subrp obj)
 	(error "Can't disassemble #<subr %s>" name))
-    (when (and (listp obj) (eq (car obj) 'autoload))
-      (load (nth 1 obj))
-      (setq obj (symbol-function name)))
-    (if (eq (car-safe obj) 'macro)	;handle macros
+    (setq obj (autoload-do-load obj name))
+    (if (eq (car-safe obj) 'macro)	;Handle macros.
 	(setq macro t
 	      obj (cdr obj)))
-    (when (and (listp obj) (eq (car obj) 'closure))
-      (error "Don't know how to compile an interpreted closure"))
     (if (and (listp obj) (eq (car obj) 'byte-code))
 	(setq obj (list 'lambda nil obj)))
     (if (and (listp obj) (not (eq (car obj) 'lambda)))
diff --git a/lisp/emacs-lisp/edebug.el b/lisp/emacs-lisp/edebug.el
index c1c65b6f661..bbf0757c3bc 100644
--- a/lisp/emacs-lisp/edebug.el
+++ b/lisp/emacs-lisp/edebug.el
@@ -242,10 +242,13 @@ If the result is non-nil, then break.  Errors are ignored."
 
 (defun get-edebug-spec (symbol)
   ;; Get the spec of symbol resolving all indirection.
-  (let ((edebug-form-spec (get symbol 'edebug-form-spec))
-	indirect)
-    (while (and (symbolp edebug-form-spec)
-		(setq indirect (get edebug-form-spec 'edebug-form-spec)))
+  (let ((edebug-form-spec nil)
+	(indirect symbol))
+    (while
+        (progn
+          (and (symbolp indirect)
+               (setq indirect
+                     (function-get indirect 'edebug-form-spec 'autoload))))
       ;; (edebug-trace "indirection: %s" edebug-form-spec)
       (setq edebug-form-spec indirect))
     edebug-form-spec
@@ -263,7 +266,7 @@ An extant spec symbol is a symbol that is not a function and has a
 	     (setq spec (cdr spec)))
 	   t))
 	((symbolp spec)
-	 (unless (functionp spec) (get spec 'edebug-form-spec)))))
+	 (unless (functionp spec) (function-get spec 'edebug-form-spec)))))
 
 ;;; Utilities
 
diff --git a/lisp/emacs-lisp/elp.el b/lisp/emacs-lisp/elp.el
index 08390327414..b94817cdb02 100644
--- a/lisp/emacs-lisp/elp.el
+++ b/lisp/emacs-lisp/elp.el
@@ -258,7 +258,7 @@ FUNSYM must be a symbol of a defined function."
     ;; the autoload here, since that could have side effects, and
     ;; elp-instrument-function is similar (in my mind) to defun-ish
     ;; type functionality (i.e. it shouldn't execute the function).
-    (and (eq (car-safe funguts) 'autoload)
+    (and (autoloadp funguts)
 	 (error "ELP cannot profile autoloaded function: %s" funsym))
     ;; We cannot profile functions used internally during profiling.
     (unless (elp-profilable-p funsym)
diff --git a/lisp/emacs-lisp/find-func.el b/lisp/emacs-lisp/find-func.el
index d64281d0e81..e1e153d9117 100644
--- a/lisp/emacs-lisp/find-func.el
+++ b/lisp/emacs-lisp/find-func.el
@@ -347,8 +347,7 @@ in `load-path'."
     (if aliases
 	(message "%s" aliases))
     (let ((library
-	   (cond ((eq (car-safe def) 'autoload)
-		  (nth 1 def))
+	   (cond ((autoloadp def) (nth 1 def))
 		 ((subrp def)
 		  (if lisp-only
 		      (error "%s is a built-in function" function))
diff --git a/lisp/emacs-lisp/gv.el b/lisp/emacs-lisp/gv.el
index eb0e64e22b8..d1f997c99c4 100644
--- a/lisp/emacs-lisp/gv.el
+++ b/lisp/emacs-lisp/gv.el
@@ -84,14 +84,7 @@ DO must return an Elisp expression."
   (if (symbolp place)
       (funcall do place (lambda (v) `(setq ,place ,v)))
     (let* ((head (car place))
-           (gf (get head 'gv-expander)))
-      ;; Autoload the head, if applicable, since that might define
-      ;; `gv-expander'.
-      (when (and (null gf) (fboundp head)
-                 (eq 'autoload (car-safe (symbol-function head))))
-        (with-demoted-errors
-          (load (nth 1 (symbol-function head)) 'noerror 'nomsg)
-          (setq gf (get head 'gv-expander))))
+           (gf (function-get head 'gv-expander 'autoload)))
       (if gf (apply gf do (cdr place))
         (let ((me (macroexpand place    ;FIXME: expand one step at a time!
                                ;; (append macroexpand-all-environment
diff --git a/lisp/emacs-lisp/lisp-mode.el b/lisp/emacs-lisp/lisp-mode.el
index 350b0bd949d..e29407f5a8b 100644
--- a/lisp/emacs-lisp/lisp-mode.el
+++ b/lisp/emacs-lisp/lisp-mode.el
@@ -158,7 +158,8 @@ It has `lisp-mode-abbrev-table' as its parent."
                                   (goto-char listbeg)
                                   (and (looking-at "([ \t\n]*\\(\\(\\sw\\|\\s_\\)+\\)")
                                        (match-string 1)))))
-                 (docelt (and firstsym (get (intern-soft firstsym)
+                 (docelt (and firstsym
+                              (function-get (intern-soft firstsym)
                                             lisp-doc-string-elt-property))))
             (if (and docelt
                      ;; It's a string in a form that can have a docstring.
@@ -1135,7 +1136,8 @@ Lisp function does not specify a special indentation."
       (let ((function (buffer-substring (point)
 					(progn (forward-sexp 1) (point))))
 	    method)
-	(setq method (or (get (intern-soft function) 'lisp-indent-function)
+	(setq method (or (function-get (intern-soft function)
+                                       'lisp-indent-function)
 			 (get (intern-soft function) 'lisp-indent-hook)))
 	(cond ((or (eq method 'defun)
 		   (and (null method)
diff --git a/lisp/emacs-lisp/macroexp.el b/lisp/emacs-lisp/macroexp.el
index 65a72aa5312..70eab149837 100644
--- a/lisp/emacs-lisp/macroexp.el
+++ b/lisp/emacs-lisp/macroexp.el
@@ -185,12 +185,7 @@ Assumes the caller has bound `macroexpand-all-environment'."
        ;; Macro expand compiler macros.  This cannot be delayed to
        ;; byte-optimize-form because the output of the compiler-macro can
        ;; use macros.
-       (let ((handler nil))
-         (while (and (symbolp func)
-                     (not (setq handler (get func 'compiler-macro)))
-                     (fboundp func))
-           ;; Follow the sequence of aliases.
-           (setq func (symbol-function func)))
+       (let ((handler (function-get func 'compiler-macro)))
          (if (null handler)
              ;; No compiler macro.  We just expand each argument (for
              ;; setq/setq-default this works alright because the variable names
@@ -198,12 +193,9 @@ Assumes the caller has bound `macroexpand-all-environment'."
              (macroexp--all-forms form 1)
            ;; If the handler is not loaded yet, try (auto)loading the
            ;; function itself, which may in turn load the handler.
-           (when (and (not (functionp handler))
-                      (fboundp func) (eq (car-safe (symbol-function func))
-                                         'autoload))
+           (unless (functionp handler)
              (ignore-errors
-               (load (nth 1 (symbol-function func))
-                     'noerror 'nomsg)))
+               (autoload-do-load (indirect-function func) func)))
            (let ((newform (macroexp--compiler-macro handler form)))
              (if (eq form newform)
                  ;; The compiler macro did not find anything to do.
diff --git a/lisp/emacs-lisp/pcase.el b/lisp/emacs-lisp/pcase.el
index 3f4ce605cb0..4aeed7e4d0e 100644
--- a/lisp/emacs-lisp/pcase.el
+++ b/lisp/emacs-lisp/pcase.el
@@ -114,7 +114,8 @@ QPatterns for vectors are not implemented yet.
 
 PRED can take the form
   FUNCTION	     in which case it gets called with one argument.
-  (FUN ARG1 .. ARGN) in which case it gets called with N+1 arguments.
+  (FUN ARG1 .. ARGN) in which case it gets called with an N+1'th argument
+                        which is the value being matched.
 A PRED of the form FUNCTION is equivalent to one of the form (FUNCTION).
 PRED patterns can refer to variables bound earlier in the pattern.
 E.g. you can match pairs where the cdr is larger than the car with a pattern
diff --git a/lisp/help-fns.el b/lisp/help-fns.el
index 2e56da0bcaa..f585bff871f 100644
--- a/lisp/help-fns.el
+++ b/lisp/help-fns.el
@@ -150,7 +150,7 @@ the same names as used in the original source code, when possible."
                     arglist)))
           (unless (zerop rest) (push '&rest arglist) (push 'rest arglist))
           (nreverse arglist))))
-   ((and (eq (car-safe def) 'autoload) (not (eq (nth 4 def) 'keymap)))
+   ((and (autoloadp def) (not (eq (nth 4 def) 'keymap)))
     "[Arg list not available until function definition is loaded.]")
    (t t)))
 
@@ -288,7 +288,7 @@ defined.  If several such files exist, preference is given to a file
 found via `load-path'.  The return value can also be `C-source', which
 means that OBJECT is a function or variable defined in C.  If no
 suitable file is found, return nil."
-  (let* ((autoloaded (eq (car-safe type) 'autoload))
+  (let* ((autoloaded (autoloadp type))
 	 (file-name (or (and autoloaded (nth 1 type))
 			(symbol-file
 			 object (if (memq type (list 'defvar 'defface))
@@ -468,7 +468,7 @@ FILE is the file where FUNCTION was probably defined."
 		  (concat beg "Lisp macro"))
 		 ((eq (car-safe def) 'closure)
 		  (concat beg "Lisp closure"))
-		 ((eq (car-safe def) 'autoload)
+		 ((autoloadp def)
 		  (format "%s autoloaded %s"
 			  (if (commandp def) "an interactive" "an")
 			  (if (eq (nth 4 def) 'keymap) "keymap"
@@ -563,7 +563,7 @@ FILE is the file where FUNCTION was probably defined."
 	     ;; If the function is autoloaded, and its docstring has
 	     ;; key substitution constructs, load the library.
 	     (doc (progn
-		    (and (eq (car-safe real-def) 'autoload)
+		    (and (autoloadp real-def)
 			 help-enable-auto-load
 			 (string-match "\\([^\\]=\\|[^=]\\|\\`\\)\\\\[[{<]"
 				       doc-raw)
diff --git a/lisp/speedbar.el b/lisp/speedbar.el
index d8c8c4a56be..16993ce1891 100644
--- a/lisp/speedbar.el
+++ b/lisp/speedbar.el
@@ -1864,9 +1864,7 @@ of the special mode functions."
 	      ;; If it is autoloaded, we need to load it now so that
 	      ;; we have access to the variable -speedbar-menu-items.
 	      ;; Is this XEmacs safe?
-	      (let ((sf (symbol-function v)))
-		(if (and (listp sf) (eq (car sf) 'autoload))
-		    (load-library (car (cdr sf)))))
+              (autoload-do-load (symbol-function v) v)
 	      (setq speedbar-special-mode-expansion-list (list v))
 	      (setq v (intern-soft (concat ms "-speedbar-key-map")))
 	      (if (not v)
diff --git a/lisp/subr.el b/lisp/subr.el
index 882ad3cd23d..76fec5dd5ac 100644
--- a/lisp/subr.el
+++ b/lisp/subr.el
@@ -1691,6 +1691,23 @@ If TOGGLE has a `:menu-tag', that is used for the menu item's label."
 
 ;;; Load history
 
+(defsubst autoloadp (object)
+  "Non-nil if OBJECT is an autoload."
+  (eq 'autoload (car-safe object)))
+
+;; (defun autoload-type (object)
+;;   "Returns the type of OBJECT or `function' or `command' if the type is nil.
+;; OBJECT should be an autoload object."
+;;   (when (autoloadp object)
+;;     (let ((type (nth 3 object)))
+;;       (cond ((null type) (if (nth 2 object) 'command 'function))
+;;             ((eq 'keymap t) 'macro)
+;;             (type)))))
+
+;; (defalias 'autoload-file #'cadr
+;;   "Return the name of the file from which AUTOLOAD will be loaded.
+;; \n\(fn AUTOLOAD)")
+
 (defun symbol-file (symbol &optional type)
   "Return the name of the file that defined SYMBOL.
 The value is normally an absolute file name.  It can also be nil,
@@ -1703,7 +1720,7 @@ TYPE is `defun', `defvar', or `defface', that specifies function
 definition, variable definition, or face definition only."
   (if (and (or (null type) (eq type 'defun))
 	   (symbolp symbol) (fboundp symbol)
-	   (eq 'autoload (car-safe (symbol-function symbol))))
+	   (autoloadp (symbol-function symbol)))
       (nth 1 (symbol-function symbol))
     (let ((files load-history)
 	  file)
@@ -2752,6 +2769,20 @@ computing the hash.  If BINARY is non-nil, return a string in binary
 form."
   (secure-hash 'sha1 object start end binary))
 
+(defun function-get (f prop &optional autoload)
+  "Return the value of property PROP of function F.
+If AUTOLOAD is non-nil and F is an autoloaded macro, try to autoload
+the macro in the hope that it will set PROP."
+  (let ((val nil))
+    (while (and (symbolp f)
+                (null (setq val (get f prop)))
+                (fboundp f))
+      (let ((fundef (symbol-function f)))
+        (if (and autoload (autoloadp fundef)
+                 (not (equal fundef (autoload-do-load fundef f 'macro))))
+            nil                         ;Re-try `get' on the same `f'.
+          (setq f fundef))))
+    val))
 
 ;;;; Support for yanking and text properties.