re PR c++/54511 (internal compiler error: in make_decl_rtl, at varasm.c:1147)

	PR c++/54511
	* pt.c (tsubst_decl) [VAR_DECL]: Handle DECL_ANON_UNION_VAR_P.

From-SVN: r191262

gcc/cp/ChangeLog

 2012-09-13  Jason Merrill  <jason@redhat.com>
 
+	PR c++/54511
+	* pt.c (tsubst_decl) [VAR_DECL]: Handle DECL_ANON_UNION_VAR_P.
+
 	PR c++/53836
 	* pt.c (value_dependent_expression_p): A TREE_LIST initializer must
 	be dependent.

gcc/cp/pt.c

@@ -10443,6 +10443,16 @@ tsubst_decl (tree t, tree args, tsubst_flags_t complain)
 	    break;
 	  }
 
+	if (TREE_CODE (t) == VAR_DECL && DECL_ANON_UNION_VAR_P (t))
+	  {
+	    /* Just use name lookup to find a member alias for an anonymous
+	       union, but then add it to the hash table.  */
+	    r = lookup_name (DECL_NAME (t));
+	    gcc_assert (DECL_ANON_UNION_VAR_P (r));
+	    register_local_specialization (r, t);
+	    break;
+	  }
+
 	/* Create a new node for the specialization we need.  */
 	r = copy_decl (t);
 	if (type == NULL_TREE)

gcc/testsuite/ChangeLog

 2012-09-13  Jason Merrill  <jason@redhat.com>
 
+	PR c++/54511
+	* g++.dg/template/anonunion2.C: New.
+
 	PR c++/53836
 	* g++.dg/template/init10.C: New.
 

gcc/testsuite/g++.dg/template/anonunion2.C

+template <int i>
+struct S
+{
+  S () { union { int a; }; a = 0; }
+};
+S<0> s;