[turbofan] Stub for typeof operator.

src/interpreter/interpreter.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/interpreter/interpreter.h"
 
 #include <fstream>
 #include <memory>
 
 #include "src/ast/prettyprinter.h"
@@ skipping 1004 matching lines @@
 }
 
 Node* Interpreter::BuildUnaryOp(Callable callable,
                                 InterpreterAssembler* assembler) {
   Node* target = __ HeapConstant(callable.code());
   Node* accumulator = __ GetAccumulator();
   Node* context = __ GetContext();
   return __ CallStub(callable.descriptor(), target, context, accumulator);
 }
 
-void Interpreter::DoUnaryOp(Callable callable,
-                            InterpreterAssembler* assembler) {
-  Node* result = BuildUnaryOp(callable, assembler);
-  __ SetAccumulator(result);
-  __ Dispatch();
-}
-
 template <class Generator>
 void Interpreter::DoUnaryOp(InterpreterAssembler* assembler) {
   Node* value = __ GetAccumulator();
   Node* context = __ GetContext();
   Node* result = Generator::Generate(assembler, value, context);
   __ SetAccumulator(result);
   __ Dispatch();
 }
 
 // ToName
@@ skipping 92 matching lines @@
   __ Bind(&end);
   __ SetAccumulator(result.value());
   __ Dispatch();
 }
 
 // TypeOf
 //
 // Load the accumulator with the string representating type of the
 // object in the accumulator.
 void Interpreter::DoTypeOf(InterpreterAssembler* assembler) {
-  DoUnaryOp(CodeFactory::Typeof(isolate_), assembler);
+  DoUnaryOp<TypeofStub>(assembler);
 }
 
 void Interpreter::DoDelete(Runtime::FunctionId function_id,
                            InterpreterAssembler* assembler) {
   Node* reg_index = __ BytecodeOperandReg(0);
   Node* object = __ LoadRegister(reg_index);
   Node* key = __ GetAccumulator();
   Node* context = __ GetContext();
   Node* result = __ CallRuntime(function_id, context, object, key);
   __ SetAccumulator(result);
@@ skipping 1020 matching lines @@
   __ StoreObjectField(generator, JSGeneratorObject::kContinuationOffset,
       __ SmiTag(new_state));
   __ SetAccumulator(old_state);
 
   __ Dispatch();
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8