re PR c++/90598 (Return type of explicit destructor call wrong)

	PR c++/90598
	* tree.c (lvalue_kind): Return clk_none for expressions with
	with VOID_TYPE_P.

	* g++.dg/cpp0x/pr90598.C: New test.

From-SVN: r271752

gcc/cp/ChangeLog

+2019-05-29  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c++/90598
+	* tree.c (lvalue_kind): Return clk_none for expressions with
+	with VOID_TYPE_P.
+
 2019-05-29  Paolo Carlini  <paolo.carlini@oracle.com>
 
 	PR c++/89875

gcc/cp/tree.c

@@ -83,6 +83,10 @@ lvalue_kind (const_tree ref)
   if (ref == current_class_ptr)
     return clk_none;
 
+  /* Expressions with cv void type are prvalues.  */
+  if (TREE_TYPE (ref) && VOID_TYPE_P (TREE_TYPE (ref)))
+    return clk_none;
+
   switch (TREE_CODE (ref))
     {
     case SAVE_EXPR:

gcc/testsuite/ChangeLog

+2019-05-29  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c++/90598
+	* g++.dg/cpp0x/pr90598.C: New test.
+
 2019-05-29  Thomas Koenig  <tkoenig@gcc.gnu.org>
 
 	PR fortran/90539

gcc/testsuite/g++.dg/cpp0x/pr90598.C

+// PR c++/90598
+// { dg-do compile { target c++11 } }
+
+struct A {};
+using B = decltype(A ().~A ());
+template <typename T> struct C;
+template <> struct C<void> {};
+C<B> t;
+// PR c++/90598
+// { dg-do compile { target c++11 } }
+
+struct A {};
+using B = decltype(A ().~A ());
+template <typename T> struct C;
+template <> struct C<void> {};
+C<B> t;