re PR debug/55328 (ICE: in output_addr_table_entry, at dwarf2out.c:21780 with -gsplit-dwarf)

2012-11-14  Sterling Augustine  <saugustine@google.com>

	PR debug/55328
	* dwarf2out.c (index_address_table_entry): Check a node's refcount.

From-SVN: r193515

gcc/ChangeLog

+2012-11-14  Sterling Augustine  <saugustine@google.com>
+
+	PR debug/55328
+	* dwarf2out.c (index_address_table_entry): Check a node's refcount.
+
 2012-11-14  Jan Hubicka  <jh@suse.cz>
 
 	PR bootstrap/55051

gcc/dwarf2out.c

@@ -4228,6 +4228,10 @@ index_addr_table_entry (void **h, void *v)
   addr_table_entry *node = (addr_table_entry *) *h;
   unsigned int *index = (unsigned int *) v;
 
+  /* Don't index unreferenced nodes.  */
+  if (node->refcount == 0)
+    return 1;
+
   gcc_assert(node->index == NO_INDEX_ASSIGNED);
   node->index = *index;
   *index += 1;