Optimize the typeof operator.

src/code-stubs.cc

 // Copyright 2012 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/code-stubs.h"
 
 #include <sstream>
 
 #include "src/bootstrapper.h"
 #include "src/cpu-profiler.h"
@@ skipping 615 matching lines @@
 
 void FastNewClosureStub::InitializeDescriptor(CodeStubDescriptor* descriptor) {
   descriptor->Initialize(
       Runtime::FunctionForId(Runtime::kNewClosureFromStubFailure)->entry);
 }
 
 
 void FastNewContextStub::InitializeDescriptor(CodeStubDescriptor* d) {}
 
 
+void TypeofStub::InitializeDescriptor(CodeStubDescriptor* descriptor) {}
+
+
 void NumberToStringStub::InitializeDescriptor(CodeStubDescriptor* descriptor) {
   NumberToStringDescriptor call_descriptor(isolate());
   descriptor->Initialize(
       Runtime::FunctionForId(Runtime::kNumberToStringRT)->entry);
 }
 
 
 void FastCloneShallowArrayStub::InitializeDescriptor(
     CodeStubDescriptor* descriptor) {
   FastCloneShallowArrayDescriptor call_descriptor(isolate());
@@ skipping 62 matching lines @@
     CodeStubDescriptor* descriptor) {
   descriptor->Initialize(FUNCTION_ADDR(BinaryOpIC_MissWithAllocationSite));
 }
 
 
 void StringAddStub::InitializeDescriptor(CodeStubDescriptor* descriptor) {
   descriptor->Initialize(Runtime::FunctionForId(Runtime::kStringAddRT)->entry);
 }
 
 
+void TypeofStub::GenerateAheadOfTime(Isolate* isolate) {
+  TypeofStub stub(isolate);
+  stub.GetCode();
+}
+
+
 void CreateAllocationSiteStub::GenerateAheadOfTime(Isolate* isolate) {
   CreateAllocationSiteStub stub(isolate);
   stub.GetCode();
 }
 
 
 void CreateWeakCellStub::GenerateAheadOfTime(Isolate* isolate) {
   CreateWeakCellStub stub(isolate);
   stub.GetCode();
 }
@@ skipping 251 matching lines @@
 }
 
 
 InternalArrayConstructorStub::InternalArrayConstructorStub(
     Isolate* isolate) : PlatformCodeStub(isolate) {
   InternalArrayConstructorStubBase::GenerateStubsAheadOfTime(isolate);
 }
 
 
 } }  // namespace v8::internal