Make type-feedback-vector.h usable without objects-inl.h header (and others).

src/type-feedback-vector-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.
 
 #ifndef V8_TYPE_FEEDBACK_VECTOR_INL_H_
 #define V8_TYPE_FEEDBACK_VECTOR_INL_H_
 
 #include "src/type-feedback-vector.h"
 
 namespace v8 {
 namespace internal {
 
+// static
+TypeFeedbackVector* TypeFeedbackVector::cast(Object* obj) {
+  DCHECK(obj->IsTypeFeedbackVector());
+  return reinterpret_cast<TypeFeedbackVector*>(obj);
+}
+
+
+int TypeFeedbackVector::first_ic_slot_index() const {
+  DCHECK(length() >= kReservedIndexCount);
+  return Smi::cast(get(kFirstICSlotIndex))->value();
+}
+
+
+int TypeFeedbackVector::ic_with_type_info_count() {
+  return length() > 0 ? Smi::cast(get(kWithTypesIndex))->value() : 0;
+}
+
+
+void TypeFeedbackVector::change_ic_with_type_info_count(int delta) {
+  if (delta == 0) return;
+  int value = ic_with_type_info_count() + delta;
+  // Could go negative because of the debugger.
+  if (value >= 0) {
+    set(kWithTypesIndex, Smi::FromInt(value));
+  }
+}
+
+
+int TypeFeedbackVector::ic_generic_count() {
+  return length() > 0 ? Smi::cast(get(kGenericCountIndex))->value() : 0;
+}
+
+
+void TypeFeedbackVector::change_ic_generic_count(int delta) {
+  if (delta == 0) return;
+  int value = ic_generic_count() + delta;
+  if (value >= 0) {
+    set(kGenericCountIndex, Smi::FromInt(value));
+  }
+}
+
+
+int TypeFeedbackVector::Slots() const {
+  if (length() == 0) return 0;
+  return Max(
+      0, first_ic_slot_index() - ic_metadata_length() - kReservedIndexCount);
+}
+
+
+int TypeFeedbackVector::ICSlots() const {
+  if (length() == 0) return 0;
+  return (length() - first_ic_slot_index()) / elements_per_ic_slot();
+}
+
+
 int TypeFeedbackVector::ic_metadata_length() const {
   return VectorICComputer::word_count(ICSlots());
 }
 
 
+// Conversion from a slot or ic slot to an integer index to the underlying
+// array.
+int TypeFeedbackVector::GetIndex(FeedbackVectorSlot slot) const {
+  DCHECK(slot.ToInt() < first_ic_slot_index());
+  return kReservedIndexCount + ic_metadata_length() + slot.ToInt();
+}
+
+
+int TypeFeedbackVector::GetIndex(FeedbackVectorICSlot slot) const {
+  int first_ic_slot = first_ic_slot_index();
+  DCHECK(slot.ToInt() < ICSlots());
+  return first_ic_slot + slot.ToInt() * elements_per_ic_slot();
+}
+
+
+// Conversion from an integer index to either a slot or an ic slot. The caller
+// should know what kind she expects.
+FeedbackVectorSlot TypeFeedbackVector::ToSlot(int index) const {
+  DCHECK(index >= kReservedIndexCount && index < first_ic_slot_index());
+  return FeedbackVectorSlot(index - ic_metadata_length() - kReservedIndexCount);
+}
+
+
+FeedbackVectorICSlot TypeFeedbackVector::ToICSlot(int index) const {
+  DCHECK(index >= first_ic_slot_index() && index < length());
+  int ic_slot = (index - first_ic_slot_index()) / elements_per_ic_slot();
+  return FeedbackVectorICSlot(ic_slot);
+}
+
+
+Object* TypeFeedbackVector::Get(FeedbackVectorSlot slot) const {
+  return get(GetIndex(slot));
+}
+
+
+void TypeFeedbackVector::Set(FeedbackVectorSlot slot, Object* value,
+                             WriteBarrierMode mode) {
+  set(GetIndex(slot), value, mode);
+}
+
+
+Object* TypeFeedbackVector::Get(FeedbackVectorICSlot slot) const {
+  return get(GetIndex(slot));
+}
+
+
+void TypeFeedbackVector::Set(FeedbackVectorICSlot slot, Object* value,
+                             WriteBarrierMode mode) {
+  set(GetIndex(slot), value, mode);
+}
+
+
 Handle<Object> TypeFeedbackVector::UninitializedSentinel(Isolate* isolate) {
   return isolate->factory()->uninitialized_symbol();
 }
 
 
 Handle<Object> TypeFeedbackVector::MegamorphicSentinel(Isolate* isolate) {
   return isolate->factory()->megamorphic_symbol();
 }
 
 
 Handle<Object> TypeFeedbackVector::PremonomorphicSentinel(Isolate* isolate) {
   return isolate->factory()->premonomorphic_symbol();
 }
 
 
 Object* TypeFeedbackVector::RawUninitializedSentinel(Heap* heap) {
   return heap->uninitialized_symbol();
 }
+
+
+Object* FeedbackNexus::GetFeedback() const { return vector()->Get(slot()); }
+
+
+Object* FeedbackNexus::GetFeedbackExtra() const {
+  DCHECK(TypeFeedbackVector::elements_per_ic_slot() > 1);
+  int extra_index = vector()->GetIndex(slot()) + 1;
+  return vector()->get(extra_index);
+}
+
+
+void FeedbackNexus::SetFeedback(Object* feedback, WriteBarrierMode mode) {
+  vector()->Set(slot(), feedback, mode);
+}
+
+
+void FeedbackNexus::SetFeedbackExtra(Object* feedback_extra,
+                                     WriteBarrierMode mode) {
+  DCHECK(TypeFeedbackVector::elements_per_ic_slot() > 1);
+  int index = vector()->GetIndex(slot()) + 1;
+  vector()->set(index, feedback_extra, mode);
+}
+
+
+Isolate* FeedbackNexus::GetIsolate() const { return vector()->GetIsolate(); }
 }
 }  // namespace v8::internal
 
 #endif  // V8_TYPE_FEEDBACK_VECTOR_INL_H_