decl.c (grok_reference_init): Handle constexpr here.

	* decl.c (grok_reference_init): Handle constexpr here.
	* call.c (initialize_reference): Not here.

From-SVN: r177734

gcc/cp/ChangeLog

+2011-08-13  Jason Merrill  <jason@redhat.com>
+
+	* decl.c (grok_reference_init): Handle constexpr here.
+	* call.c (initialize_reference): Not here.
+
 2011-08-12  Jason Merrill  <jason@redhat.com>
 
 	PR c++/50034

gcc/cp/call.c

@@ -8820,12 +8820,6 @@ initialize_reference (tree type, tree expr, tree decl, tree *cleanup,
 		    (build_pointer_type (base_conv_type), expr,
 		     complain));
 	  expr = build_nop (type, expr);
-	  if (DECL_DECLARED_CONSTEXPR_P (decl))
-	    {
-	      expr = cxx_constant_value (expr);
-	      DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl)
-		= reduced_constant_expression_p (expr);
-	    }
 	}
     }
   else

gcc/cp/decl.c

@@ -4597,6 +4597,12 @@ grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
      explicitly); we need to allow the temporary to be initialized
      first.  */
   tmp = initialize_reference (type, init, decl, cleanup, tf_warning_or_error);
+  if (DECL_DECLARED_CONSTEXPR_P (decl))
+    {
+      tmp = cxx_constant_value (tmp);
+      DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl)
+	= reduced_constant_expression_p (tmp);
+    }
 
   if (tmp == error_mark_node)
     return NULL_TREE;