--- old/src/hotspot/cpu/x86/macroAssembler_x86.hpp	2018-05-07 15:51:58.792291370 +0200
+++ new/src/hotspot/cpu/x86/macroAssembler_x86.hpp	2018-05-07 15:51:58.496286356 +0200
@@ -108,6 +108,8 @@
   void test_flat_array_klass(Register klass, Register temp_reg, Label& is_flat_array);
   void test_flat_array_oop(Register oop, Register temp_reg, Label& is_flat_array);
 
+  void test_oop_is_not_value(Register oop, Register temp, Label& is_not_value);
+
   // Required platform-specific helpers for Label::patch_instructions.
   // They _shadow_ the declarations in AbstractAssembler, which are undefined.
   void pd_patch_instruction(address branch, address target) {