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

src/objects-inl.h

Index: src/objects-inl.h
diff --git a/src/objects-inl.h b/src/objects-inl.h
index 1e40ac5d9c12f6b253f75530812d4f4bc41573ea..f13ad94be14db877c05d6d75e7146eed5fdab08b 100644
--- a/src/objects-inl.h
+++ b/src/objects-inl.h
@@ -718,6 +718,7 @@ 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 {
@@ -743,9 +744,6 @@ bool Object::IsTransitionArray() const {
 }
 
 
-bool Object::IsTypeFeedbackVector() const { return IsFixedArray(); }
-
-
 bool Object::IsDeoptimizationInputData() const {
   // Must be a fixed array.
   if (!IsFixedArray()) return false;
@@ -4111,7 +4109,8 @@ int HeapObject::SizeFromMap(Map* map) {
   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 ||