Vector ICs: Introduce an InstanceType for the type feedback vector.

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 700 matching lines @@
 TYPE_CHECKER(JSMap, JS_MAP_TYPE)
 TYPE_CHECKER(JSSetIterator, JS_SET_ITERATOR_TYPE)
 TYPE_CHECKER(JSMapIterator, JS_MAP_ITERATOR_TYPE)
 TYPE_CHECKER(JSWeakMap, JS_WEAK_MAP_TYPE)
 TYPE_CHECKER(JSWeakSet, JS_WEAK_SET_TYPE)
 TYPE_CHECKER(JSContextExtensionObject, JS_CONTEXT_EXTENSION_OBJECT_TYPE)
 TYPE_CHECKER(Map, MAP_TYPE)
 TYPE_CHECKER(FixedArray, FIXED_ARRAY_TYPE)
 TYPE_CHECKER(FixedDoubleArray, FIXED_DOUBLE_ARRAY_TYPE)
 TYPE_CHECKER(WeakFixedArray, FIXED_ARRAY_TYPE)
+TYPE_CHECKER(TypeFeedbackVector, FEEDBACK_VECTOR_TYPE)
 
 
 bool Object::IsJSWeakCollection() const {
   return IsJSWeakMap() || IsJSWeakSet();
 }
 
 
 bool Object::IsDescriptorArray() const {
   return IsFixedArray();
 }
 
 
 bool Object::IsArrayList() const { return IsFixedArray(); }
 
 
 bool Object::IsLayoutDescriptor() const {
   return IsSmi() || IsFixedTypedArrayBase();
 }
 
 
 bool Object::IsTransitionArray() const {
   return IsFixedArray();
 }
 
 
-bool Object::IsTypeFeedbackVector() const { return IsFixedArray(); }
-
-
 bool Object::IsDeoptimizationInputData() const {
   // Must be a fixed array.
   if (!IsFixedArray()) return false;
 
   // There's no sure way to detect the difference between a fixed array and
   // a deoptimization data array.  Since this is used for asserts we can
   // check that the length is zero or else the fixed size plus a multiple of
   // the entry size.
   int length = FixedArray::cast(this)->length();
   if (length == 0) return true;
@@ skipping 3345 matching lines @@
   return CopyInstallDescriptors(map, new_descriptor, descriptors,
                                 layout_descriptor);
 }
 
 
 int HeapObject::SizeFromMap(Map* map) {
   int instance_size = map->instance_size();
   if (instance_size != kVariableSizeSentinel) return instance_size;
   // Only inline the most frequent cases.
   InstanceType instance_type = map->instance_type();
-  if (instance_type == FIXED_ARRAY_TYPE) {
+  if (instance_type == FIXED_ARRAY_TYPE ||
+      instance_type == FEEDBACK_VECTOR_TYPE) {
     return FixedArray::BodyDescriptor::SizeOf(map, this);
   }
   if (instance_type == ONE_BYTE_STRING_TYPE ||
       instance_type == ONE_BYTE_INTERNALIZED_STRING_TYPE) {
     // Strings may get concurrently truncated, hence we have to access its
     // length synchronized.
     return SeqOneByteString::SizeFor(
         reinterpret_cast<SeqOneByteString*>(this)->synchronized_length());
   }
   if (instance_type == BYTE_ARRAY_TYPE) {
@@ skipping 3172 matching lines @@
 #undef READ_SHORT_FIELD
 #undef WRITE_SHORT_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 #undef NOBARRIER_READ_BYTE_FIELD
 #undef NOBARRIER_WRITE_BYTE_FIELD
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_INL_H_