PR c++/51043 - ICE in LTO

	* cp-tree.h (TYPE_ALIAS_P, TYPE_TEMPLATE_INFO): Don't crash on
	NULL TYPE_NAME.

From-SVN: r181231

gcc/cp/ChangeLog

@@ -41,6 +41,10 @@
 
 2011-11-09  Dodji Seketeli  <dodji@redhat.com>
 
+	PR c++/51043
+	* cp-tree.h (TYPE_ALIAS_P, TYPE_TEMPLATE_INFO): Don't crash on
+	NULL TYPE_NAME.
+
 	PR c++/51027
 	* parser.c (cp_parser_alias_declaration): Require ';' at the end
     	of the declaration.

gcc/cp/cp-tree.h

@@ -2552,6 +2552,7 @@ extern void decl_shadowed_for_var_insert (tree, tree);
    another-type'.  */
 #define TYPE_ALIAS_P(NODE)			\
   (TYPE_P (NODE)				\
+   && TYPE_NAME (NODE)				\
    && TYPE_DECL_ALIAS_P (TYPE_NAME (NODE)))
 
 /* For a class type: if this structure has many fields, we'll sort them
@@ -2612,7 +2613,7 @@ extern void decl_shadowed_for_var_insert (tree, tree);
     ? TEMPLATE_TEMPLATE_PARM_TEMPLATE_INFO (NODE) :			\
     ((CLASS_TYPE_P (NODE) && !TYPE_ALIAS_P (NODE))			\
      ? CLASSTYPE_TEMPLATE_INFO (NODE)					\
-     : (DECL_LANG_SPECIFIC (TYPE_NAME (NODE))		\
+     : ((TYPE_NAME (NODE) && DECL_LANG_SPECIFIC (TYPE_NAME (NODE)))	\
 	? (DECL_TEMPLATE_INFO (TYPE_NAME (NODE)))			\
 	: NULL_TREE))))