re PR middle-end/44104 (New test failures)

	PR debug/44104
	* dwarf2out.c (modified_type_die): Don't dereference mod_type_die
	if it is NULL.

From-SVN: r159367

gcc/ChangeLog

+2010-05-13  Jakub Jelinek  <jakub@redhat.com>
+
+	PR debug/44104
+	* dwarf2out.c (modified_type_die): Don't dereference mod_type_die
+	if it is NULL.
+
 2010-05-13  Kai Tietz  <kai.tietz@onevision.com>
 
 	* config.gcc (i[34567]86-*-mingw* | x86_64-*-mingw*): Choose

gcc/dwarf2out.c

@@ -12544,7 +12544,7 @@ modified_type_die (tree type, int is_const_type, int is_volatile_type,
       add_name_attribute (mod_type_die, IDENTIFIER_POINTER (name));
     }
   /* This probably indicates a bug.  */
-  else if (mod_type_die->die_tag == DW_TAG_base_type)
+  else if (mod_type_die && mod_type_die->die_tag == DW_TAG_base_type)
     add_name_attribute (mod_type_die, "__unknown__");
 
   if (qualified_type)