Add Object::IsNullOrUndefined(Isolate*) helper method

src/ic/ic.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/ic/ic.h"
 
 #include <iostream>
 
 #include "src/accessors.h"
 #include "src/api-arguments-inl.h"
@@ skipping 369 matching lines @@
   }
 
   return true;
 }
 
 
 void IC::UpdateState(Handle<Object> receiver, Handle<Object> name) {
   update_receiver_map(receiver);
   if (!name->IsString()) return;
   if (state() != MONOMORPHIC && state() != POLYMORPHIC) return;
-  if (receiver->IsUndefined(isolate()) || receiver->IsNull(isolate())) return;
+  if (receiver->IsNullOrUndefined(isolate())) return;
 
   // Remove the target from the code cache if it became invalid
   // because of changes in the prototype chain to avoid hitting it
   // again.
   if (ShouldRecomputeHandler(Handle<String>::cast(name))) {
     MarkRecomputeHandler(name);
   }
 }
 
 
@@ skipping 256 matching lines @@
   nexus->ConfigurePolymorphic(maps, transitioned_maps, handlers);
 
   vector_set_ = true;
   OnTypeFeedbackChanged(isolate(), get_host());
 }
 
 
 MaybeHandle<Object> LoadIC::Load(Handle<Object> object, Handle<Name> name) {
   // If the object is undefined or null it's illegal to try to get any
   // of its properties; throw a TypeError in that case.
-  if (object->IsUndefined(isolate()) || object->IsNull(isolate())) {
+  if (object->IsNullOrUndefined(isolate())) {
     if (FLAG_use_ic && state() != UNINITIALIZED && state() != PREMONOMORPHIC) {
       // Ensure the IC state progresses.
       TRACE_HANDLER_STATS(isolate(), LoadIC_NonReceiver);
       update_receiver_map(object);
       PatchCache(name, slow_stub());
       TRACE_IC("LoadIC", name);
     }
     return TypeError(MessageTemplate::kNonObjectPropertyLoad, object, name);
   }
 
@@ skipping 1133 matching lines @@
   if (MigrateDeprecated(object) || object->IsJSProxy()) {
     Handle<Object> result;
     ASSIGN_RETURN_ON_EXCEPTION(
         isolate(), result,
         Object::SetProperty(object, name, value, language_mode()), Object);
     return result;
   }
 
   // If the object is undefined or null it's illegal to try to set any
   // properties on it; throw a TypeError in that case.
-  if (object->IsUndefined(isolate()) || object->IsNull(isolate())) {
+  if (object->IsNullOrUndefined(isolate())) {
     if (FLAG_use_ic && state() != UNINITIALIZED && state() != PREMONOMORPHIC) {
       // Ensure the IC state progresses.
       TRACE_HANDLER_STATS(isolate(), StoreIC_NonReceiver);
       update_receiver_map(object);
       PatchCache(name, slow_stub());
       TRACE_IC("StoreIC", name);
     }
     return TypeError(MessageTemplate::kNonObjectPropertyStore, object, name);
   }
 
@@ skipping 1380 matching lines @@
     DCHECK_EQ(LookupIterator::INTERCEPTOR, it.state());
     it.Next();
     ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result,
                                        Object::GetProperty(&it));
   }
 
   return *result;
 }
 }  // namespace internal
 }  // namespace v8