(byte-optimize-backward-char, byte-optimize-backward-word): New

optimizations.
(side-effect-free-fns, side-effect-and-error-free-fns): Extra entries.

diff --git a/lisp/emacs-lisp/byte-opt.el b/lisp/emacs-lisp/byte-opt.el
index 6ec77af88d038c2f257511639c52de98a2dbd47f..ccb9e1b5f77656d9a7eb2d73d8dca3424c1163b8 100644 (file)
--- a/lisp/emacs-lisp/byte-opt.el
+++ b/lisp/emacs-lisp/byte-opt.el
@@ -1098,6 +1098,25 @@
     (if constant
        (eval form)
       form)))
+
+;; Avoid having to write forward-... with a negative arg for speed.
+(put 'backward-char 'byte-optimizer 'byte-optimize-backward-char)
+(defun byte-optimize-backward-char (form)
+  (cond ((and (= 2 (safe-length form))
+             (numberp (nth 1 form)))
+        (list 'forward-char (eval (- (nth 1 form)))))
+       ((= 1 (safe-length form))
+        '(forward-char -1))
+       (t form)))
+
+(put 'backward-word 'byte-optimizer 'byte-optimize-backward-word)
+(defun byte-optimize-backward-word (form)
+  (cond ((and (= 2 (safe-length form))
+             (numberp (nth 1 form)))
+        (list 'forward-word (eval (- (nth 1 form)))))
+       ((= 1 (safe-length form))
+        '(forward-char -1))
+       (t form)))
 \f
 ;;; enumerating those functions which need not be called if the returned 
 ;;; value is not used.  That is, something like
@@ -1115,22 +1134,24 @@
         boundp buffer-file-name buffer-local-variables buffer-modified-p
         buffer-substring
         capitalize car-less-than-car car cdr ceiling concat coordinates-in-window-p
-        copy-marker cos count-lines
+        char-width copy-marker cos count-lines
         default-boundp default-value documentation downcase
         elt exp expt fboundp featurep
         file-directory-p file-exists-p file-locked-p file-name-absolute-p
         file-newer-than-file-p file-readable-p file-symlink-p file-writable-p
-        float floor format
+        float floor format frame-visible-p
         get get-buffer get-buffer-window getenv get-file-buffer
         int-to-string
-        length log log10 logand logb logior lognot logxor lsh
+        keymap-parent
+        length local-variable-if-set-p local-variable-p log log10 logand logb logior lognot logxor lsh
         marker-buffer max member memq min mod
         next-window nth nthcdr number-to-string
-        parse-colon-path previous-window
+        parse-colon-path prefix-numeric-value previous-window
         radians-to-degrees rassq regexp-quote reverse round
         sin sqrt string< string= string-equal string-lessp string-to-char
-        string-to-int string-to-number substring symbol-plist
-        tan upcase user-variable-p vconcat
+        string-to-int string-to-number substring symbol-function symbol-plist
+        symbol-value
+        tan unibyte-char-to-multibyte upcase user-variable-p vconcat
         window-buffer window-dedicated-p window-edges window-height
         window-hscroll window-minibuffer-p window-width
         zerop))
@@ -1138,21 +1159,27 @@
        '(arrayp atom
         bobp bolp buffer-end buffer-list buffer-size buffer-string bufferp
         car-safe case-table-p cdr-safe char-or-string-p commandp cons consp
-        current-buffer
+        current-buffer current-global-map current-indentation
+        current-local-map current-minor-mode-maps
         dot dot-marker eobp eolp eq eql equal eventp floatp framep
         get-largest-window get-lru-window
         identity ignore integerp integer-or-marker-p interactive-p
         invocation-directory invocation-name
-        keymapp list listp
+        keymapp
+        line-beginning-position line-end-position list listp
         make-marker mark mark-marker markerp memory-limit minibuffer-window
         mouse-movement-p
         natnump nlistp not null number-or-marker-p numberp
         one-window-p overlayp
         point point-marker point-min point-max processp
-        selected-window sequencep stringp subrp symbolp syntax-table-p
+        recent-keys recursion-depth
+        selected-frame selected-window sequencep stringp subrp symbolp
+        standard-case-table standard-syntax-table syntax-table-p
+        this-command-keys this-command-keys-vector this-single-command-keys
+        this-single-command-raw-keys
         user-full-name user-login-name user-original-login-name
         user-real-login-name user-real-uid user-uid
-        vector vectorp
+        vector vectorp visible-frame-list
         window-configuration-p window-live-p windowp)))
   (while side-effect-free-fns
     (put (car side-effect-free-fns) 'side-effect-free t)