--- a/src/hotspot/share/runtime/vmOperations.hpp	Mon Jun 24 16:51:23 2019 -0400
+++ b/src/hotspot/share/runtime/vmOperations.hpp	Mon Jun 24 22:38:17 2019 -0400
@@ -49,6 +49,7 @@
   template(ClearICs)                              \
   template(ForceSafepoint)                        \
   template(ForceAsyncSafepoint)                   \
+  template(Deoptimize)                            \
   template(DeoptimizeFrame)                       \
   template(DeoptimizeAll)                         \
   template(ZombieAll)                             \
@@ -318,6 +319,14 @@
   VM_GTestExecuteAtSafepoint() {}
 };
 
+class VM_Deoptimize: public VM_Operation {
+ public:
+  VM_Deoptimize() {}
+  VMOp_Type type() const                        { return VMOp_Deoptimize; }
+  void doit();
+  bool allow_nested_vm_operations() const        { return true; }
+};
+
 class VM_MarkActiveNMethods: public VM_Operation {
  public:
   VM_MarkActiveNMethods() {}