[runtime] Improve Object::ToNumber, ToInteger, ToInt32, ToUint32, ToString

src/objects-inl.h

 // 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.
 //
 // Review notes:
 //
 // - The use of macros in these inline functions may seem superfluous
 // but it is absolutely needed to make sure gcc generates optimal
 // code. gcc is not happy when attempting to inline too deep.
 //
@@ skipping 633 matching lines @@
   }
 
   Vector<const char> string_;
   uint32_t hash_field_;
   int chars_;  // Caches the number of characters when computing the hash code.
   uint32_t seed_;
 };
 
 
 bool Object::IsNumber() const {
-  return IsSmi() || IsHeapNumber();
+  return IsSmi() || HeapObject::cast(this)->IsHeapNumber();
 }
 
 
 TYPE_CHECKER(ByteArray, BYTE_ARRAY_TYPE)
 TYPE_CHECKER(BytecodeArray, BYTECODE_ARRAY_TYPE)
 TYPE_CHECKER(FreeSpace, FREE_SPACE_TYPE)
 
 bool HeapObject::IsFiller() const {
   InstanceType instance_type = map()->instance_type();
   return instance_type == FREE_SPACE_TYPE || instance_type == FILLER_TYPE;
@@ skipping 409 matching lines @@
   return ConvertToName(isolate, input);
 }
 
 // static
 MaybeHandle<Object> Object::ToPrimitive(Handle<Object> input,
                                         ToPrimitiveHint hint) {
   if (input->IsPrimitive()) return input;
   return JSReceiver::ToPrimitive(Handle<JSReceiver>::cast(input), hint);
 }
 
+// static
+MaybeHandle<Object> Object::ToNumber(Handle<Object> input) {
+  if (input->IsNumber()) return input;
+  return ConvertToNumber(HeapObject::cast(*input)->GetIsolate(), input);
+}
+
+// static
+MaybeHandle<Object> Object::ToInteger(Isolate* isolate, Handle<Object> input) {
+  if (input->IsSmi()) return input;
+  return ConvertToInteger(isolate, input);
+}
+
+// static
+MaybeHandle<Object> Object::ToInt32(Isolate* isolate, Handle<Object> input) {
+  if (input->IsSmi()) return input;
+  return ConvertToInt32(isolate, input);
+}
+
+// static
+MaybeHandle<Object> Object::ToUint32(Isolate* isolate, Handle<Object> input) {
+  if (input->IsSmi()) return handle(Smi::cast(*input)->ToUint32Smi(), isolate);
+  return ConvertToUint32(isolate, input);
+}
+
+// static
+MaybeHandle<String> Object::ToString(Isolate* isolate, Handle<Object> input) {
+  if (input->IsString()) return Handle<String>::cast(input);
+  return ConvertToString(isolate, input);
+}
 
 bool Object::HasSpecificClassOf(String* name) {
   return this->IsJSObject() && (JSObject::cast(this)->class_name() == name);
 }
 
 MaybeHandle<Object> Object::GetProperty(Handle<Object> object,
                                         Handle<Name> name) {
   LookupIterator it(object, name);
   if (!it.IsFound()) return it.factory()->undefined_value();
   return GetProperty(&it);
@@ skipping 7391 matching lines @@
 #undef WRITE_INT64_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 #undef NOBARRIER_READ_BYTE_FIELD
 #undef NOBARRIER_WRITE_BYTE_FIELD
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_OBJECTS_INL_H_