Fix cast to rvalue reference from prvalue.

	* cvt.c (diagnose_ref_binding): Handle rvalue reference.
	* rtti.c (build_dynamic_cast_1): Don't try to build a reference to
	non-class type.  Handle xvalue argument.
	* typeck.c (build_reinterpret_cast_1): Allow cast from prvalue to
	rvalue reference.
	* semantics.c (finish_compound_literal): Do direct-initialization,
	not cast, to initialize a reference.

From-SVN: r260622

1 files changed, 5 insertions, 5 deletions

diff --git a/gcc/cp/rtti.c b/gcc/cp/rtti.c
index 426a2327..6692fb7 100644
--- a/gcc/cp/rtti.c
+++ b/gcc/cp/rtti.c
@@ -616,22 +616,22 @@ build_dynamic_cast_1 (tree type, tree expr, tsubst_flags_t complain)
   else
     {
       expr = mark_lvalue_use (expr);
-
-      exprtype = build_reference_type (TREE_TYPE (expr));
+      exprtype = TREE_TYPE (expr);
 
       /* T is a reference type, v shall be an lvalue of a complete class
 	 type, and the result is an lvalue of the type referred to by T.  */
-
-      if (! MAYBE_CLASS_TYPE_P (TREE_TYPE (exprtype)))
+      if (! MAYBE_CLASS_TYPE_P (exprtype))
 	{
 	  errstr = _("source is not of class type");
 	  goto fail;
 	}
-      if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (exprtype))))
+      if (!COMPLETE_TYPE_P (complete_type (exprtype)))
 	{
 	  errstr = _("source is of incomplete class type");
 	  goto fail;
 	}
+
+      exprtype = cp_build_reference_type (exprtype, !lvalue_p (expr));
     }
 
   /* The dynamic_cast operator shall not cast away constness.  */