* src/bytecode.c (struct byte_stack): Remove `constants' when unused.

2 files changed, 17 insertions, 9 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index b58bbc0a525..044bd5fa245 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,14 +1,18 @@
+2013-03-10  Stefan Monnier  <monnier@iro.umontreal.ca>
+
+	* bytecode.c (struct byte_stack): Remove `constants' when unused.
+
 2013-03-10  Eli Zaretskii  <eliz@gnu.org>
 
 	* xdisp.c (display_tool_bar_line, redisplay_tool_bar)
 	(redisplay_internal, set_cursor_from_row, try_window)
 	(try_window_id, dump_glyph_row, extend_face_to_end_of_line)
 	(display_line, notice_overwritten_cursor)
-	(mouse_face_from_buffer_pos, note_mouse_highlight): Use
-	MATRIX_ROW_DISPLAYS_TEXT_P.
+	(mouse_face_from_buffer_pos, note_mouse_highlight):
+	Use MATRIX_ROW_DISPLAYS_TEXT_P.
 	(note_mouse_highlight): Use MATRIX_ROW_GLYPH_START.
-	(mouse_face_from_string_pos, fast_find_string_pos): Use
-	MATRIX_ROW_VPOS.
+	(mouse_face_from_string_pos, fast_find_string_pos):
+	Use MATRIX_ROW_VPOS.
 
 	* xfns.c (Fx_show_tip): Use MATRIX_ROW_DISPLAYS_TEXT_P.
 
@@ -25,8 +29,8 @@
 
 	* coding.c (detect_coding): Cound the heading ASCII bytes in the
 	case of detection for coding_category_utf_8_auto.
-	(decode_coding_gap) [not CODING_DISABLE_ASCII_OPTIMIZATION]: Skip
-	decoding if all bytes are ASCII.
+	(decode_coding_gap) [not CODING_DISABLE_ASCII_OPTIMIZATION]:
+	Skip decoding if all bytes are ASCII.
 
 	* insdel.c (adjust_after_replace): Make it public.  New arg
 	text_at_gap_tail.
diff --git a/src/bytecode.c b/src/bytecode.c
index bd8abe85e04..628c4d90cf3 100644
--- a/src/bytecode.c
+++ b/src/bytecode.c
@@ -313,9 +313,11 @@ struct byte_stack
   Lisp_Object byte_string;
   const unsigned char *byte_string_start;
 
+#if BYTE_MARK_STACK
   /* The vector of constants used during byte-code execution.  Storing
      this here protects it from GC because mark_byte_stack marks it.  */
   Lisp_Object constants;
+#endif
 
   /* Next entry in byte_stack_list.  */
   struct byte_stack *next;
@@ -379,12 +381,12 @@ unmark_byte_stack (void)
 }
 
 
-/* Fetch the next byte from the bytecode stream */
+/* Fetch the next byte from the bytecode stream.  */
 
 #define FETCH *stack.pc++
 
 /* Fetch two bytes from the bytecode stream and make a 16-bit number
-   out of them */
+   out of them.  */
 
 #define FETCH2 (op = FETCH, op + (FETCH << 8))
 
@@ -404,7 +406,7 @@ unmark_byte_stack (void)
 #define DISCARD(n) (top -= (n))
 
 /* Get the value which is at the top of the execution stack, but don't
-   pop it. */
+   pop it.  */
 
 #define TOP (*top)
 
@@ -535,7 +537,9 @@ exec_byte_code (Lisp_Object bytestr, Lisp_Object vector, Lisp_Object maxdepth,
 
   stack.byte_string = bytestr;
   stack.pc = stack.byte_string_start = SDATA (bytestr);
+#if BYTE_MARK_STACK
   stack.constants = vector;
+#endif
   if (MAX_ALLOCA / word_size <= XFASTINT (maxdepth))
     memory_full (SIZE_MAX);
   top = alloca ((XFASTINT (maxdepth) + 1) * sizeof *top);