PR c++/81188 - matching decltype of member function call.

	* tree.c (cp_tree_equal): Remove COMPONENT_REF special case.

From-SVN: r249813

gcc/cp/ChangeLog

+2017-06-29  Jason Merrill  <jason@redhat.com>
+
+	PR c++/81188 - matching decltype of member function call.
+	* tree.c (cp_tree_equal): Remove COMPONENT_REF special case.
+
 2017-06-29  Nathan Sidwell  <nathan@acm.org>
 
 	PR c++/81247

gcc/cp/tree.c

@@ -3589,11 +3589,6 @@ cp_tree_equal (tree t1, tree t2)
 	return false;
       return cp_tree_equal (TREE_OPERAND (t1, 1), TREE_OPERAND (t1, 1));
 
-    case COMPONENT_REF:
-      if (TREE_OPERAND (t1, 1) != TREE_OPERAND (t2, 1))
-	return false;
-      return cp_tree_equal (TREE_OPERAND (t1, 0), TREE_OPERAND (t2, 0));
-
     case PARM_DECL:
       /* For comparing uses of parameters in late-specified return types
 	 with an out-of-class definition of the function, but can also come

gcc/testsuite/g++.dg/cpp0x/decltype-call4.C

+// PR c++/81188
+// { dg-do compile { target c++11 } }
+
+template <class F>
+struct C {
+  F fast(long i) const;
+  auto operator[](long i) const -> decltype(this->fast(i));
+};
+
+template <class F>
+auto C<F>::operator[](long i) const -> decltype(this->fast(i)) {
+  return fast(i);
+}