re PR c++/68653 (ICE: in nonnull_arg_p, at tree.c:13853)

	PR c++/68653
	* tree.c (nonnull_arg_p): Allow OFFSET_TYPE.

	* g++.dg/warn/nonnull3.C: New test.

From-SVN: r231200

gcc/ChangeLog

+2015-12-02  Marek Polacek  <polacek@redhat.com>
+
+	PR c++/68653
+	* tree.c (nonnull_arg_p): Allow OFFSET_TYPE.
+
 2015-12-02  Nathan Sidwell  <nathan@acm.org>
 
 	* config/nvptx/nvptx.c (enum nvptx_shuffle_kind): New.  Absorb

gcc/testsuite/ChangeLog

+2015-12-02  Marek Polacek  <polacek@redhat.com>
+
+	PR c++/68653
+	* g++.dg/warn/nonnull3.C: New test.
+
 2015-12-02  Joseph Myers  <joseph@codesourcery.com>
 
 	PR c/68162

gcc/testsuite/g++.dg/warn/nonnull3.C

+// PR c++/68653
+// { dg-do compile { target c++11 } }
+// { dg-options "-Wall" }
+
+struct B;
+struct A {
+  template <typename T> __attribute__((nonnull)) bool foo (int T::*);
+  void bar (B *);
+};
+
+template <typename T> bool A::foo (int T::*p)
+{
+  return p;
+}
+void A::bar (B *)
+{
+  foo ((int B::*) nullptr);
+}
+// { dg-warning "nonnull argument" "" {target "*-*-*"} 0 }

gcc/tree.c

@@ -13848,7 +13848,9 @@ nonnull_arg_p (const_tree arg)
   tree t, attrs, fntype;
   unsigned HOST_WIDE_INT arg_num;
 
-  gcc_assert (TREE_CODE (arg) == PARM_DECL && POINTER_TYPE_P (TREE_TYPE (arg)));
+  gcc_assert (TREE_CODE (arg) == PARM_DECL
+	      && (POINTER_TYPE_P (TREE_TYPE (arg))
+		  || TREE_CODE (TREE_TYPE (arg)) == OFFSET_TYPE));
 
   /* The static chain decl is always non null.  */
   if (arg == cfun->static_chain_decl)