line-map.h (struct line_maps): Remove unused field last_listed.

* include/line-map.h (struct line_maps):
Remove unused field last_listed. Update all users.

From-SVN: r176898

libcpp/ChangeLog

+2011-07-28  Gabriel Charette  <gchare@google.com>
+
+	* include/line-map.h (struct line_maps):
+	Remove unused field last_listed. Update all users.
+
 2011-07-28  H.J. Lu  <hongjiu.lu@intel.com>
 
 	* configure.ac: Set need_64bit_hwint to yes for x86 targets.

libcpp/include/line-map.h

@@ -76,11 +76,6 @@ struct GTY(()) line_maps {
 
   unsigned int cache;
 
-  /* The most recently listed include stack, if any, starts with
-     LAST_LISTED as the topmost including file.  -1 indicates nothing
-     has been listed yet.  */
-  int last_listed;
-
   /* Depth of the include stack, including the current file.  */
   unsigned int depth;
 

libcpp/line-map.c

@@ -34,7 +34,6 @@ linemap_init (struct line_maps *set)
   set->maps = NULL;
   set->allocated = 0;
   set->used = 0;
-  set->last_listed = -1;
   set->trace_includes = false;
   set->depth = 0;
   set->cache = 0;