// Copyright 2014 the V8 project authors. All rights reserved.
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-// * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-// * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following
-// disclaimer in the documentation and/or other materials provided
-// with the distribution.
-// * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived
-// from this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
#ifndef V8_FEEDBACK_SLOTS_H_
#define V8_FEEDBACK_SLOTS_H_
namespace v8 {
namespace internal {
-enum ComputablePhase {
- DURING_PARSE,
- AFTER_SCOPING
-};
-
-
class FeedbackSlotInterface {
public:
static const int kInvalidFeedbackSlot = -1;
virtual ~FeedbackSlotInterface() {}
- // When can we ask how many feedback slots are necessary?
- virtual ComputablePhase GetComputablePhase() = 0;
- virtual int ComputeFeedbackSlotCount(Isolate* isolate) = 0;
+ virtual int ComputeFeedbackSlotCount() = 0;
virtual void SetFirstFeedbackSlot(int slot) = 0;
};
-
-class DeferredFeedbackSlotProcessor {
- public:
- DeferredFeedbackSlotProcessor()
- : slot_nodes_(NULL),
- slot_count_(0) { }
-
- void add_slot_node(Zone* zone, FeedbackSlotInterface* slot) {
- if (slot->GetComputablePhase() == DURING_PARSE) {
- // No need to add to the list
- int count = slot->ComputeFeedbackSlotCount(zone->isolate());
- slot->SetFirstFeedbackSlot(slot_count_);
- slot_count_ += count;
- } else {
- if (slot_nodes_ == NULL) {
- slot_nodes_ = new(zone) ZoneList<FeedbackSlotInterface*>(10, zone);
- }
- slot_nodes_->Add(slot, zone);
- }
- }
-
- void ProcessFeedbackSlots(Isolate* isolate) {
- // Scope analysis must have been done.
- if (slot_nodes_ == NULL) {
- return;
- }
-
- int current_slot = slot_count_;
- for (int i = 0; i < slot_nodes_->length(); i++) {
- FeedbackSlotInterface* slot_interface = slot_nodes_->at(i);
- int count = slot_interface->ComputeFeedbackSlotCount(isolate);
- if (count > 0) {
- slot_interface->SetFirstFeedbackSlot(current_slot);
- current_slot += count;
- }
- }
-
- slot_count_ = current_slot;
- slot_nodes_->Clear();
- }
-
- int slot_count() {
- ASSERT(slot_count_ >= 0);
- return slot_count_;
- }
-
- private:
- ZoneList<FeedbackSlotInterface*>* slot_nodes_;
- int slot_count_;
-};
-
-
} } // namespace v8::internal
#endif // V8_FEEDBACK_SLOTS_H_