PR c++/92859 - ADL and bit-field.

We also need unlowered_expr_type when considering associated types for ADL.

	* name-lookup.c: Use unlowered_expr_type.

From-SVN: r279229

gcc/cp/ChangeLog

 2019-12-11  Jason Merrill  <jason@redhat.com>
 
+	PR c++/92859 - ADL and bit-field.
+	* name-lookup.c: Use unlowered_expr_type.
+
 	PR c++/92446 - deduction of class NTTP.
 	* pt.c (deducible_expression): Look through VIEW_CONVERT_EXPR.
 

gcc/cp/name-lookup.c

@@ -908,7 +908,7 @@ name_lookup::adl_expr (tree expr)
 
   if (TREE_TYPE (expr) != unknown_type_node)
     {
-      adl_type (TREE_TYPE (expr));
+      adl_type (unlowered_expr_type (expr));
       return;
     }
 

gcc/testsuite/g++.dg/overload/bit-field1.C

+// PR c++/92859
+// { dg-do compile { target c++11 } }
+
+void f(int) = delete;
+
+struct ES { 
+  enum E { v }; 
+  friend void f(E) { }
+};
+
+struct S {
+  ES::E e : 1; 
+};
+
+int main() {
+  S s{}; 
+  f (s.e);
+}