+//===----------------------------------------------------------------------===//
+/// ConstantTokenNone - a constant token which is empty
+///
+class ConstantTokenNone : public Constant {
+ void *operator new(size_t, unsigned) = delete;
+ ConstantTokenNone(const ConstantTokenNone &) = delete;
+
+ friend class Constant;
+ void destroyConstantImpl();
+ Value *handleOperandChangeImpl(Value *From, Value *To, Use *U);
+
+protected:
+ explicit ConstantTokenNone(LLVMContext &Context)
+ : Constant(Type::getTokenTy(Context), ConstantTokenNoneVal, nullptr, 0) {}
+ // allocate space for exactly zero operands
+ void *operator new(size_t s) { return User::operator new(s, 0); }