Introduce IsUndefined(Isolate*) and IsTheHole(Isolate*)

src/deoptimizer.cc

Index: src/deoptimizer.cc
diff --git a/src/deoptimizer.cc b/src/deoptimizer.cc
index b23665d9a229fbcf185b2935d4c1b47a89e56d36..9363551a425133c9805b82ca6c60a9b5dff0adcb 100644
--- a/src/deoptimizer.cc
+++ b/src/deoptimizer.cc
@@ -56,9 +56,10 @@ DeoptimizerData::~DeoptimizerData() {
 Code* Deoptimizer::FindDeoptimizingCode(Address addr) {
   if (function_->IsHeapObject()) {
     // Search all deoptimizing code in the native context of the function.
+    Isolate* isolate = function_->GetIsolate();
     Context* native_context = function_->context()->native_context();
     Object* element = native_context->DeoptimizedCodeListHead();
-    while (!element->IsUndefined()) {
+    while (!element->IsUndefined(isolate)) {
       Code* code = Code::cast(element);
       CHECK(code->kind() == Code::OPTIMIZED_FUNCTION);
       if (code->contains(addr)) return code;
@@ -186,7 +187,8 @@ void Deoptimizer::VisitAllOptimizedFunctionsForContext(
   // no longer refer to optimized code.
   JSFunction* prev = NULL;
   Object* element = context->OptimizedFunctionsListHead();
-  while (!element->IsUndefined()) {
+  Isolate* isolate = context->GetIsolate();
+  while (!element->IsUndefined(isolate)) {
     JSFunction* function = JSFunction::cast(element);
     Object* next = function->next_function_link();
     if (function->code()->kind() != Code::OPTIMIZED_FUNCTION ||
@@ -226,7 +228,7 @@ void Deoptimizer::VisitAllOptimizedFunctions(
 
   // Run through the list of all native contexts.
   Object* context = isolate->heap()->native_contexts_list();
-  while (!context->IsUndefined()) {
+  while (!context->IsUndefined(isolate)) {
     VisitAllOptimizedFunctionsForContext(Context::cast(context), visitor);
     context = Context::cast(context)->next_context_link();
   }
@@ -315,7 +317,7 @@ void Deoptimizer::DeoptimizeMarkedCodeForContext(Context* context) {
   // Walk over all optimized code objects in this native context.
   Code* prev = NULL;
   Object* element = context->OptimizedCodeListHead();
-  while (!element->IsUndefined()) {
+  while (!element->IsUndefined(isolate)) {
     Code* code = Code::cast(element);
     CHECK_EQ(code->kind(), Code::OPTIMIZED_FUNCTION);
     Object* next = code->next_code_link();
@@ -385,7 +387,7 @@ void Deoptimizer::DeoptimizeAll(Isolate* isolate) {
   DisallowHeapAllocation no_allocation;
   // For all contexts, mark all code, then deoptimize.
   Object* context = isolate->heap()->native_contexts_list();
-  while (!context->IsUndefined()) {
+  while (!context->IsUndefined(isolate)) {
     Context* native_context = Context::cast(context);
     MarkAllCodeForContext(native_context);
     DeoptimizeMarkedCodeForContext(native_context);
@@ -406,7 +408,7 @@ void Deoptimizer::DeoptimizeMarkedCode(Isolate* isolate) {
   DisallowHeapAllocation no_allocation;
   // For all contexts, deoptimize code already marked.
   Object* context = isolate->heap()->native_contexts_list();
-  while (!context->IsUndefined()) {
+  while (!context->IsUndefined(isolate)) {
     Context* native_context = Context::cast(context);
     DeoptimizeMarkedCodeForContext(native_context);
     context = native_context->next_context_link();
@@ -416,7 +418,8 @@ void Deoptimizer::DeoptimizeMarkedCode(Isolate* isolate) {
 
 void Deoptimizer::MarkAllCodeForContext(Context* context) {
   Object* element = context->OptimizedCodeListHead();
-  while (!element->IsUndefined()) {
+  Isolate* isolate = context->GetIsolate();
+  while (!element->IsUndefined(isolate)) {
     Code* code = Code::cast(element);
     CHECK_EQ(code->kind(), Code::OPTIMIZED_FUNCTION);
     code->set_marked_for_deoptimization(true);
@@ -660,10 +663,10 @@ int Deoptimizer::GetDeoptimizedCodeCount(Isolate* isolate) {
   int length = 0;
   // Count all entries in the deoptimizing code list of every context.
   Object* context = isolate->heap()->native_contexts_list();
-  while (!context->IsUndefined()) {
+  while (!context->IsUndefined(isolate)) {
     Context* native_context = Context::cast(context);
     Object* element = native_context->DeoptimizedCodeListHead();
-    while (!element->IsUndefined()) {
+    while (!element->IsUndefined(isolate)) {
       Code* code = Code::cast(element);
       DCHECK(code->kind() == Code::OPTIMIZED_FUNCTION);
       length++;
@@ -989,7 +992,7 @@ void Deoptimizer::DoComputeJSFrame(TranslatedFrame* translated_frame,
   }
   // Read the context from the translations.
   Object* context = context_pos->GetRawValue();
-  if (context == isolate_->heap()->undefined_value()) {
+  if (context->IsUndefined(isolate_)) {
     // If the context was optimized away, just use the context from
     // the activation. This should only apply to Crankshaft code.
     CHECK(!compiled_code_->is_turbofanned());
@@ -3789,7 +3792,7 @@ Handle<Object> TranslatedState::MaterializeAt(int frame_index,
           object->set_context(Context::cast(*context));
           object->set_literals(LiteralsArray::cast(*literals));
           CHECK(entry->IsNumber());  // Entry to compile lazy stub.
-          CHECK(next_link->IsUndefined());
+          CHECK(next_link->IsUndefined(isolate_));
           return object;
         }
         case FIXED_ARRAY_TYPE: {