1 files changed, 51 insertions, 0 deletions
diff --git a/deps/v8/src/compiler/vector-slot-pair.h b/deps/v8/src/compiler/vector-slot-pair.h
new file mode 100644
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+++ b/deps/v8/src/compiler/vector-slot-pair.h
@@ -0,0 +1,51 @@
+// 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_COMPILER_VECTOR_SLOT_PAIR_H_
+#define V8_COMPILER_VECTOR_SLOT_PAIR_H_
+
+#include "src/common/globals.h"
+#include "src/handles/handles.h"
+#include "src/utils/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,
+                 InlineCacheState ic_state)
+      : vector_(vector), slot_(slot), ic_state_(ic_state) {}
+
+  bool IsValid() const { return !vector_.is_null() && !slot_.IsInvalid(); }
+
+  Handle<FeedbackVector> vector() const { return vector_; }
+  FeedbackSlot slot() const { return slot_; }
+  InlineCacheState ic_state() const { return ic_state_; }
+
+  int index() const;
+
+ private:
+  Handle<FeedbackVector> vector_;
+  FeedbackSlot slot_;
+  InlineCacheState ic_state_ = UNINITIALIZED;
+};
+
+bool operator==(VectorSlotPair const&, VectorSlotPair const&);
+bool operator!=(VectorSlotPair const&, VectorSlotPair const&);
+
+V8_EXPORT_PRIVATE std::ostream& operator<<(std::ostream& os,
+                                           VectorSlotPair const&);
+
+size_t hash_value(VectorSlotPair const&);
+
+}  // namespace internal
+}  // namespace v8
+
+#endif  // V8_COMPILER_VECTOR_SLOT_PAIR_H_