1 files changed, 47 insertions, 0 deletions
diff --git a/deps/v8/src/vector-slot-pair.h b/deps/v8/src/vector-slot-pair.h
new file mode 100644
index 0000000000..cd9434c630
--- /dev/null
+++ b/deps/v8/src/vector-slot-pair.h
@@ -0,0 +1,47 @@
+// Copyright 2017 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_VECTOR_SLOT_PAIR_H_
+#define V8_VECTOR_SLOT_PAIR_H_
+
+#include "src/globals.h"
+#include "src/handles.h"
+#include "src/utils.h"
+
+namespace v8 {
+namespace internal {
+
+class FeedbackVector;
+
+// Defines a pair of {FeedbackVector} and {FeedbackSlot}, which
+// is used to access the type feedback for a certain {Node}.
+class V8_EXPORT_PRIVATE VectorSlotPair {
+ public:
+  VectorSlotPair();
+  VectorSlotPair(Handle<FeedbackVector> vector, FeedbackSlot slot)
+      : vector_(vector), slot_(slot) {}
+
+  bool IsValid() const { return !vector_.is_null() && !slot_.IsInvalid(); }
+
+  Handle<FeedbackVector> vector() const { return vector_; }
+  FeedbackSlot slot() const { return slot_; }
+
+  int index() const;
+
+ private:
+  Handle<FeedbackVector> vector_;
+  FeedbackSlot slot_;
+};
+
+bool operator==(VectorSlotPair const&, VectorSlotPair const&);
+bool operator!=(VectorSlotPair const&, VectorSlotPair const&);
+
+std::ostream& operator<<(std::ostream& os, const VectorSlotPair& pair);
+
+size_t hash_value(VectorSlotPair const&);
+
+}  // namespace internal
+}  // namespace v8
+
+#endif  // V8_VECTOR_SLOT_PAIR_H_