re PR c++/66857 (Reference not bound to lvalue)

Fix PR c++/66857

gcc/cp/ChangeLog:

	PR c++/66857
	* cvt.c (ocp_convert): Don't call scalar_constant_value when
	converting to a class type.

gcc/testsuite/ChangeLog:

	PR c++/66857
	* g++.dg/init/pr66857.C: New test.

From-SVN: r226228

gcc/cp/ChangeLog

+2015-07-25  Patrick Palka  <ppalka@gcc.gnu.org>
+
+	PR c++/66857
+	* cvt.c (ocp_convert): Don't call scalar_constant_value when
+	converting to a class type.
+
 2015-07-24  Jason Merrill  <jason@redhat.com>
 
 	PR c++/64969

gcc/cp/cvt.c

@@ -687,7 +687,8 @@ ocp_convert (tree type, tree expr, int convtype, int flags,
     }
 
   /* FIXME remove when moving to c_fully_fold model.  */
-  e = scalar_constant_value (e);
+  if (!CLASS_TYPE_P (type))
+    e = scalar_constant_value (e);
   if (error_operand_p (e))
     return error_mark_node;
 

gcc/testsuite/ChangeLog

+2015-07-25  Patrick Palka  <ppalka@gcc.gnu.org>
+
+	PR c++/66857
+	* g++.dg/init/pr66857.C: New test.
+
 2015-07-25  Uros Bizjak  <ubizjak@gmail.com>
 
 	PR target/66648

gcc/testsuite/g++.dg/init/pr66857.C

+// PR c++/66857
+// { dg-do run }
+
+const int i = 0;
+
+struct Test
+{
+  Test (const int &rhs)
+  {
+    if (&rhs != &i)
+      __builtin_abort ();
+  }
+};
+
+int
+main (void)
+{
+  Test test = i;
+}