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| 1 // Copyright 2015 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_TEST_FEEDBACK_VECTOR_H_ |
| 6 #define V8_TEST_FEEDBACK_VECTOR_H_ |
| 7 |
| 8 #include "src/objects.h" |
| 9 |
| 10 |
| 11 namespace v8 { |
| 12 namespace internal { |
| 13 |
| 14 // Helper class that allows to write tests in a slot size independent manner. |
| 15 // Use helper.slot(X) to get X'th slot identifier. |
| 16 class FeedbackVectorHelper { |
| 17 public: |
| 18 explicit FeedbackVectorHelper(Handle<TypeFeedbackVector> vector) |
| 19 : vector_(vector) { |
| 20 int slot_count = vector->Slots(); |
| 21 slots_.reserve(slot_count); |
| 22 TypeFeedbackMetadataIterator iter(vector); |
| 23 while (iter.HasNext()) { |
| 24 FeedbackVectorSlot slot = iter.Next(); |
| 25 slots_.push_back(slot); |
| 26 } |
| 27 } |
| 28 |
| 29 Handle<TypeFeedbackVector> vector() { return vector_; } |
| 30 |
| 31 // Returns slot identifier by numerical index. |
| 32 FeedbackVectorSlot slot(int index) const { return slots_[index]; } |
| 33 |
| 34 // Returns the number of slots in the feedback vector. |
| 35 int slot_count() const { return static_cast<int>(slots_.size()); } |
| 36 |
| 37 private: |
| 38 Handle<TypeFeedbackVector> vector_; |
| 39 std::vector<FeedbackVectorSlot> slots_; |
| 40 }; |
| 41 |
| 42 } // namespace internal |
| 43 } // namespace v8 |
| 44 |
| 45 #endif |
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