re PR preprocessor/41543 (BUILTINS_LOCATION wrong with -fpreprocessed)

PR preprocessor/41543
	* input.h (BUILTINS_LOCATION): Change to 1 from 2.
	Assert BUILTINS_LOCATION < RESERVED_LOCATION_COUNT.
	* tree.c: Include intl.h.
	(expand_location): Handle BUILTINS_LOCATION.
	* Makefile.in (tree.o): Depend on intl.h.

	* include/line-map.h (RESERVED_LOCATION_COUNT): Define.
	* line-map.c (linemap_init): Initialize highest_location and
	highest_line to RESERVED_LOCATION_COUNT-1 instead of 0.

	* gcc.dg/debug/dwarf2/pr41543.c: New test.

From-SVN: r152761

libcpp/ChangeLog

@@ -1,3 +1,10 @@
+2009-10-14  Jakub Jelinek  <jakub@redhat.com>
+
+	PR preprocessor/41543
+	* include/line-map.h (RESERVED_LOCATION_COUNT): Define.
+	* line-map.c (linemap_init): Initialize highest_location and
+	highest_line to RESERVED_LOCATION_COUNT-1 instead of 0.
+
 2009-10-09  Jason Merrill  <jason@redhat.com>
 
 	* charset.c (_cpp_valid_ucn): Update C++0x restrictions.

libcpp/include/line-map.h

@@ -143,6 +143,11 @@ extern const struct line_map *linemap_add
 extern const struct line_map *linemap_lookup
   (struct line_maps *, source_location);
 
+/* source_location values from 0 to RESERVED_LOCATION_COUNT-1 will
+   be reserved for libcpp user as special values, no token from libcpp
+   will contain any of those locations.  */
+#define RESERVED_LOCATION_COUNT	2
+
 /* Converts a map and a source_location to source line.  */
 #define SOURCE_LINE(MAP, LOC) \
   ((((LOC) - (MAP)->start_location) >> (MAP)->column_bits) + (MAP)->to_line)

libcpp/line-map.c

@@ -38,8 +38,8 @@ linemap_init (struct line_maps *set)
   set->trace_includes = false;
   set->depth = 0;
   set->cache = 0;
-  set->highest_location = 0;
-  set->highest_line = 0;
+  set->highest_location = RESERVED_LOCATION_COUNT - 1;
+  set->highest_line = RESERVED_LOCATION_COUNT - 1;
   set->max_column_hint = 0;
   set->reallocator = 0;
 }