Distinction between FeedbackVectorICSlot and FeedbackVectorSlot eliminated.

test/cctest/test-feedback-vector.h

+// Copyright 2015 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_TEST_FEEDBACK_VECTOR_H_
+#define V8_TEST_FEEDBACK_VECTOR_H_
+
+#include "src/objects.h"
+
+
+namespace v8 {
+namespace internal {
+
+// Helper class that allows to write tests in a slot size independent manner.
+// Use helper.slot(X) to get X'th slot identifier.
+class FeedbackVectorHelper {

[mvstanton, 2015/10/01 10:24:31]

I wonder if we might want this in /src/type-feedback-vector.h...

[Igor Sheludko, 2015/10/01 12:46:29]

I think the production code must always use slots returned by Spec::AddSlot()
methods.

+ public:
+  explicit FeedbackVectorHelper(Handle<TypeFeedbackVector> vector)
+      : vector_(vector) {
+    int slot_count = vector->Slots();
+    slots_.reserve(slot_count);
+    TypeFeedbackMetadataIterator iter(vector);
+    while (iter.HasNext()) {
+      FeedbackVectorSlot slot = iter.Next();
+      slots_.push_back(slot);
+    }
+  }
+
+  Handle<TypeFeedbackVector> vector() { return vector_; }
+
+  // Returns slot identifier by numerical index.
+  FeedbackVectorSlot slot(int index) const { return slots_[index]; }
+
+  // Returns the number of slots in the feedback vector.
+  int slot_count() const { return static_cast<int>(slots_.size()); }
+
+ private:
+  Handle<TypeFeedbackVector> vector_;
+  std::vector<FeedbackVectorSlot> slots_;
+};
+
+}  // namespace internal
+}  // namespace v8
+
+#endif