1// Copyright 2017 the V8 project authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef V8_VECTOR_SLOT_PAIR_H_
6#define V8_VECTOR_SLOT_PAIR_H_
7
8#include "src/globals.h"
9#include "src/handles.h"
10#include "src/utils.h"
11
12namespace v8 {
13namespace internal {
14
15class FeedbackVector;
16
17// Defines a pair of {FeedbackVector} and {FeedbackSlot}, which
18// is used to access the type feedback for a certain {Node}.
19class V8_EXPORT_PRIVATE VectorSlotPair {
20 public:
21 VectorSlotPair();
22 VectorSlotPair(Handle<FeedbackVector> vector, FeedbackSlot slot,
23 InlineCacheState ic_state)
24 : vector_(vector), slot_(slot), ic_state_(ic_state) {}
25
26 bool IsValid() const { return !vector_.is_null() && !slot_.IsInvalid(); }
27
28 Handle<FeedbackVector> vector() const { return vector_; }
29 FeedbackSlot slot() const { return slot_; }
30 InlineCacheState ic_state() const { return ic_state_; }
31
32 int index() const;
33
34 private:
35 Handle<FeedbackVector> vector_;
36 FeedbackSlot slot_;
37 InlineCacheState ic_state_ = UNINITIALIZED;
38};
39
40bool operator==(VectorSlotPair const&, VectorSlotPair const&);
41bool operator!=(VectorSlotPair const&, VectorSlotPair const&);
42
43V8_EXPORT_PRIVATE std::ostream& operator<<(std::ostream& os,
44 VectorSlotPair const&);
45
46size_t hash_value(VectorSlotPair const&);
47
48} // namespace internal
49} // namespace v8
50
51#endif // V8_VECTOR_SLOT_PAIR_H_
52