Use shortcuts for Flength

When calculating the length of a Lisp object whose type is
known, use a specialized length operation on it to save a bit
of runtime overhead.
* src/callint.c (Fcall_interactively):
* src/minibuf.c (read_minibuf_unwind):
Use ASIZE rather than Flength on values that must be vectors.
* src/charset.c (Fsort_charsets):
* src/coding.c (detect_coding_sjis):
(Fdefine_coding_system_internal):
* src/data.c (wrong_choice):
* src/eval.c (Flet, eval_sub, Fapply, apply_lambda):
* src/fns.c (sort_list):
* src/font.c (font_vconcat_entity_vectors)
(font_find_for_lface):
* src/frame.c (Fmodify_frame_parameters):
* src/fringe.c (get_logical_fringe_bitmap):
* src/ftfont.c (ftfont_get_open_type_spec):
* src/gtkutil.c (xg_print_frames_dialog):
* src/lread.c (read1, read_vector):
* src/keymap.c (Fkey_description):
* src/kqueue.c (Fkqueue_add_watch):
* src/macfont.m (macfont_get_open_type_spec):
* src/menu.c (parse_single_submenu, x_popup_menu_1):
* src/minibuf.c (Finternal_complete_buffer):
* src/nsfont.m (ns_findfonts, nsfont_list_family):
* src/process.c (Fmake_process):
* src/search.c (Fset_match_data):
* src/xfaces.c (Fx_family_fonts):
Use list_length rather than Flength on values that must be lists.
* src/fns.c (list_length): New function.
(Flength): Use it.
* src/nsfont.m (ns_findfonts):
Use !NILP (x) rather than XFIXNUM (Flength (x)) != 0.
* src/xdisp.c (store_mode_line_string):
Use SCHARS rather than Flength on values that must be strings.

1 files changed, 3 insertions, 5 deletions

diff --git a/src/ftfont.c b/src/ftfont.c
index 6899a5763a8..f5a225be056 100644
--- a/src/ftfont.c
+++ b/src/ftfont.c
@@ -594,16 +594,14 @@ ftfont_get_open_type_spec (Lisp_Object otf_spec)
   spec->nfeatures[0] = spec->nfeatures[1] = 0;
   for (i = 0; i < 2 && ! NILP (otf_spec); i++, otf_spec = XCDR (otf_spec))
     {
-      Lisp_Object len;
-
       val = XCAR (otf_spec);
       if (NILP (val))
 	continue;
-      len = Flength (val);
+      ptrdiff_t len = list_length (val);
       spec->features[i] =
-	(min (PTRDIFF_MAX, SIZE_MAX) / sizeof (int) < XFIXNUM (len)
+	(min (PTRDIFF_MAX, SIZE_MAX) / sizeof (int) < len
 	 ? 0
-	 : malloc (XFIXNUM (len) * sizeof *spec->features[i]));
+	 : malloc (len * sizeof *spec->features[i]));
       if (! spec->features[i])
 	{
 	  if (i > 0 && spec->features[0])