Clean up hash creation code to use Handle<Smi> where possible

Also remove apparently-bogus TODO and reorder arguments in
Object::GetOrCreateHash to put Isolate first (as seems to
be the custom).

R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/268063005

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21246 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/api.cc

@@ -3584,8 +3584,7 @@ int v8::Object::GetIdentityHash() {
   ENTER_V8(isolate);
   i::HandleScope scope(isolate);
   i::Handle<i::JSObject> self = Utils::OpenHandle(this);
-  return i::Handle<i::Smi>::cast(
-      i::JSReceiver::GetOrCreateIdentityHash(self))->value();
+  return i::JSReceiver::GetOrCreateIdentityHash(self)->value();
 }
 
 

src/objects-inl.h

@@ -6319,7 +6319,7 @@ bool JSGlobalProxy::IsDetachedFrom(GlobalObject* global) {
 }
 
 
-Handle<Object> JSReceiver::GetOrCreateIdentityHash(Handle<JSReceiver> object) {
+Handle<Smi> JSReceiver::GetOrCreateIdentityHash(Handle<JSReceiver> object) {
   return object->IsJSProxy()
       ? JSProxy::GetOrCreateIdentityHash(Handle<JSProxy>::cast(object))
       : JSObject::GetOrCreateIdentityHash(Handle<JSObject>::cast(object));

src/objects.cc

@@ -945,11 +945,9 @@ Object* Object::GetHash() {
 }
 
 
-Handle<Object> Object::GetOrCreateHash(Handle<Object> object,
-                                       Isolate* isolate) {
+Handle<Smi> Object::GetOrCreateHash(Isolate* isolate, Handle<Object> object) {
   Handle<Object> hash(object->GetHash(), isolate);
-  if (hash->IsSmi())
-    return hash;
+  if (hash->IsSmi()) return Handle<Smi>::cast(hash);
 
   ASSERT(object->IsJSReceiver());
   return JSReceiver::GetOrCreateIdentityHash(Handle<JSReceiver>::cast(object));
@@ -5098,13 +5096,13 @@ void JSObject::SetIdentityHash(Handle<JSObject> object, Handle<Smi> hash) {
 
 
 template<typename ProxyType>
-static Handle<Object> GetOrCreateIdentityHashHelper(Handle<ProxyType> proxy) {
+static Handle<Smi> GetOrCreateIdentityHashHelper(Handle<ProxyType> proxy) {
   Isolate* isolate = proxy->GetIsolate();
 
-  Handle<Object> hash(proxy->hash(), isolate);
-  if (hash->IsSmi()) return hash;
+  Handle<Object> maybe_hash(proxy->hash(), isolate);
+  if (maybe_hash->IsSmi()) return Handle<Smi>::cast(maybe_hash);
 
-  hash = handle(GenerateIdentityHash(isolate), isolate);
+  Handle<Smi> hash(GenerateIdentityHash(isolate), isolate);
   proxy->set_hash(*hash);
   return hash;
 }
@@ -5124,17 +5122,17 @@ Object* JSObject::GetIdentityHash() {
 }
 
 
-Handle<Object> JSObject::GetOrCreateIdentityHash(Handle<JSObject> object) {
+Handle<Smi> JSObject::GetOrCreateIdentityHash(Handle<JSObject> object) {
   if (object->IsJSGlobalProxy()) {
     return GetOrCreateIdentityHashHelper(Handle<JSGlobalProxy>::cast(object));
   }
 
   Isolate* isolate = object->GetIsolate();
 
-  Handle<Object> hash(object->GetIdentityHash(), isolate);
-  if (hash->IsSmi()) return hash;
+  Handle<Object> maybe_hash(object->GetIdentityHash(), isolate);
+  if (maybe_hash->IsSmi()) return Handle<Smi>::cast(maybe_hash);
 
-  hash = handle(GenerateIdentityHash(isolate), isolate);
+  Handle<Smi> hash(GenerateIdentityHash(isolate), isolate);
   SetHiddenProperty(object, isolate->factory()->identity_hash_string(), hash);
   return hash;
 }
@@ -5145,7 +5143,7 @@ Object* JSProxy::GetIdentityHash() {
 }
 
 
-Handle<Object> JSProxy::GetOrCreateIdentityHash(Handle<JSProxy> proxy) {
+Handle<Smi> JSProxy::GetOrCreateIdentityHash(Handle<JSProxy> proxy) {
   return GetOrCreateIdentityHashHelper(proxy);
 }
 
@@ -16114,7 +16112,7 @@ Handle<ObjectHashTable> ObjectHashTable::Put(Handle<ObjectHashTable> table,
   Isolate* isolate = table->GetIsolate();
 
   // Make sure the key object has an identity hash code.
-  Handle<Object> hash = Object::GetOrCreateHash(key, isolate);
+  Handle<Smi> hash = Object::GetOrCreateHash(isolate, key);
 
   int entry = table->FindEntry(key);
 
@@ -16133,7 +16131,7 @@ Handle<ObjectHashTable> ObjectHashTable::Put(Handle<ObjectHashTable> table,
 
   // Check whether the hash table should be extended.
   table = EnsureCapacity(table, 1, key);
-  table->AddEntry(table->FindInsertionEntry(Handle<Smi>::cast(hash)->value()),
+  table->AddEntry(table->FindInsertionEntry(hash->value()),
                   *key,
                   *value);
   return table;
@@ -16426,8 +16424,8 @@ Handle<OrderedHashSet> OrderedHashSet::Add(Handle<OrderedHashSet> table,
 
   table = EnsureGrowable(table);
 
-  Handle<Object> hash = GetOrCreateHash(key, table->GetIsolate());
-  int index = table->AddEntry(Smi::cast(*hash)->value());
+  Handle<Smi> hash = GetOrCreateHash(table->GetIsolate(), key);
+  int index = table->AddEntry(hash->value());
   table->set(index, *key);
   return table;
 }
@@ -16468,8 +16466,8 @@ Handle<OrderedHashMap> OrderedHashMap::Put(Handle<OrderedHashMap> table,
 
   table = EnsureGrowable(table);
 
-  Handle<Object> hash = GetOrCreateHash(key, table->GetIsolate());
-  int index = table->AddEntry(Smi::cast(*hash)->value());
+  Handle<Smi> hash = GetOrCreateHash(table->GetIsolate(), key);
+  int index = table->AddEntry(hash->value());
   table->set(index, *key);
   table->set(index + kValueOffset, *value);
   return table;

src/objects.h

@@ -1503,10 +1503,7 @@ class Object {
   // Returns the permanent hash code associated with this object depending on
   // the actual object type. May create and store a hash code if needed and none
   // exists.
-  // TODO(rafaelw): Remove isolate parameter when objects.cc is fully
-  // handlified.
-  static Handle<Object> GetOrCreateHash(Handle<Object> object,
-                                        Isolate* isolate);
+  static Handle<Smi> GetOrCreateHash(Isolate* isolate, Handle<Object> object);
 
   // Checks whether this object has the same value as the given one.  This
   // function is implemented according to ES5, section 9.12 and can be used
@@ -1972,7 +1969,7 @@ class JSReceiver: public HeapObject {
 
   // Retrieves a permanent object identity hash code. May create and store a
   // hash code if needed and none exists.
-  inline static Handle<Object> GetOrCreateIdentityHash(
+  inline static Handle<Smi> GetOrCreateIdentityHash(
       Handle<JSReceiver> object);
 
   // Lookup a property.  If found, the result is valid and has
@@ -2884,7 +2881,7 @@ class JSObject: public JSReceiver {
 
   MUST_USE_RESULT Object* GetIdentityHash();
 
-  static Handle<Object> GetOrCreateIdentityHash(Handle<JSObject> object);
+  static Handle<Smi> GetOrCreateIdentityHash(Handle<JSObject> object);
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(JSObject);
 };
@@ -9874,7 +9871,7 @@ class JSProxy: public JSReceiver {
 
   MUST_USE_RESULT Object* GetIdentityHash();
 
-  static Handle<Object> GetOrCreateIdentityHash(Handle<JSProxy> proxy);
+  static Handle<Smi> GetOrCreateIdentityHash(Handle<JSProxy> proxy);
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(JSProxy);
 };