De-generify the GenericNode.

src/compiler/generic-node-inl.h

-// Copyright 2013 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_GENERIC_NODE_INL_H_
-#define V8_COMPILER_GENERIC_NODE_INL_H_
-
-#include "src/v8.h"
-
-#include "src/compiler/generic-node.h"
-#include "src/compiler/graph.h"
-#include "src/zone.h"
-
-namespace v8 {
-namespace internal {
-namespace compiler {
-
-template <class B, class S>
-GenericNode<B, S>::GenericNode(Graph* graph, int input_count,
-                               int reserve_input_count)
-    : BaseClass(graph->zone()),
-      input_count_(input_count),
-      reserve_input_count_(reserve_input_count),
-      has_appendable_inputs_(false),
-      use_count_(0),
-      first_use_(NULL),
-      last_use_(NULL) {
-  DCHECK(reserve_input_count <= kMaxReservedInputs);
-  inputs_.static_ = reinterpret_cast<Input*>(this + 1);
-  AssignUniqueID(graph);
-}
-
-template <class B, class S>
-inline void GenericNode<B, S>::AssignUniqueID(Graph* graph) {
-  id_ = graph->NextNodeID();
-}
-
-template <class B, class S>
-inline typename GenericNode<B, S>::Inputs::iterator
-GenericNode<B, S>::Inputs::begin() {
-  return typename GenericNode<B, S>::Inputs::iterator(this->node_, 0);
-}
-
-template <class B, class S>
-inline typename GenericNode<B, S>::Inputs::iterator
-GenericNode<B, S>::Inputs::end() {
-  return typename GenericNode<B, S>::Inputs::iterator(
-      this->node_, this->node_->InputCount());
-}
-
-template <class B, class S>
-inline typename GenericNode<B, S>::Uses::iterator
-GenericNode<B, S>::Uses::begin() {
-  return typename GenericNode<B, S>::Uses::iterator(this->node_);
-}
-
-template <class B, class S>
-inline typename GenericNode<B, S>::Uses::iterator
-GenericNode<B, S>::Uses::end() {
-  return typename GenericNode<B, S>::Uses::iterator();
-}
-
-template <class B, class S>
-void GenericNode<B, S>::ReplaceUses(GenericNode* replace_to) {
-  for (Use* use = first_use_; use != NULL; use = use->next) {
-    use->from->GetInputRecordPtr(use->input_index)->to = replace_to;
-  }
-  if (replace_to->last_use_ == NULL) {
-    DCHECK_EQ(NULL, replace_to->first_use_);
-    replace_to->first_use_ = first_use_;
-    replace_to->last_use_ = last_use_;
-  } else if (first_use_ != NULL) {
-    DCHECK_NE(NULL, replace_to->first_use_);
-    replace_to->last_use_->next = first_use_;
-    first_use_->prev = replace_to->last_use_;
-    replace_to->last_use_ = last_use_;
-  }
-  replace_to->use_count_ += use_count_;
-  use_count_ = 0;
-  first_use_ = NULL;
-  last_use_ = NULL;
-}
-
-template <class B, class S>
-template <class UnaryPredicate>
-void GenericNode<B, S>::ReplaceUsesIf(UnaryPredicate pred,
-                                      GenericNode* replace_to) {
-  for (Use* use = first_use_; use != NULL;) {
-    Use* next = use->next;
-    if (pred(static_cast<S*>(use->from))) {
-      RemoveUse(use);
-      replace_to->AppendUse(use);
-      use->from->GetInputRecordPtr(use->input_index)->to = replace_to;
-    }
-    use = next;
-  }
-}
-
-template <class B, class S>
-void GenericNode<B, S>::RemoveAllInputs() {
-  for (typename Inputs::iterator iter(inputs().begin()); iter != inputs().end();
-       ++iter) {
-    iter.GetInput()->Update(NULL);
-  }
-}
-
-template <class B, class S>
-void GenericNode<B, S>::TrimInputCount(int new_input_count) {
-  if (new_input_count == input_count_) return;  // Nothing to do.
-
-  DCHECK(new_input_count < input_count_);
-
-  // Update inline inputs.
-  for (int i = new_input_count; i < input_count_; i++) {
-    typename GenericNode<B, S>::Input* input = GetInputRecordPtr(i);
-    input->Update(NULL);
-  }
-  input_count_ = new_input_count;
-}
-
-template <class B, class S>
-void GenericNode<B, S>::ReplaceInput(int index, GenericNode<B, S>* new_to) {
-  Input* input = GetInputRecordPtr(index);
-  input->Update(new_to);
-}
-
-template <class B, class S>
-void GenericNode<B, S>::Input::Update(GenericNode<B, S>* new_to) {
-  GenericNode* old_to = this->to;
-  if (new_to == old_to) return;  // Nothing to do.
-  // Snip out the use from where it used to be
-  if (old_to != NULL) {
-    old_to->RemoveUse(use);
-  }
-  to = new_to;
-  // And put it into the new node's use list.
-  if (new_to != NULL) {
-    new_to->AppendUse(use);
-  } else {
-    use->next = NULL;
-    use->prev = NULL;
-  }
-}
-
-template <class B, class S>
-void GenericNode<B, S>::EnsureAppendableInputs(Zone* zone) {
-  if (!has_appendable_inputs_) {
-    void* deque_buffer = zone->New(sizeof(InputDeque));
-    InputDeque* deque = new (deque_buffer) InputDeque(zone);
-    for (int i = 0; i < input_count_; ++i) {
-      deque->push_back(inputs_.static_[i]);
-    }
-    inputs_.appendable_ = deque;
-    has_appendable_inputs_ = true;
-  }
-}
-
-template <class B, class S>
-void GenericNode<B, S>::AppendInput(Zone* zone, GenericNode<B, S>* to_append) {
-  Use* new_use = new (zone) Use;
-  Input new_input;
-  new_input.to = to_append;
-  new_input.use = new_use;
-  if (reserve_input_count_ > 0) {
-    DCHECK(!has_appendable_inputs_);
-    reserve_input_count_--;
-    inputs_.static_[input_count_] = new_input;
-  } else {
-    EnsureAppendableInputs(zone);
-    inputs_.appendable_->push_back(new_input);
-  }
-  new_use->input_index = input_count_;
-  new_use->from = this;
-  to_append->AppendUse(new_use);
-  input_count_++;
-}
-
-template <class B, class S>
-void GenericNode<B, S>::InsertInput(Zone* zone, int index,
-                                    GenericNode<B, S>* to_insert) {
-  DCHECK(index >= 0 && index < InputCount());
-  // TODO(turbofan): Optimize this implementation!
-  AppendInput(zone, InputAt(InputCount() - 1));
-  for (int i = InputCount() - 1; i > index; --i) {
-    ReplaceInput(i, InputAt(i - 1));
-  }
-  ReplaceInput(index, to_insert);
-}
-
-template <class B, class S>
-void GenericNode<B, S>::RemoveInput(int index) {
-  DCHECK(index >= 0 && index < InputCount());
-  // TODO(turbofan): Optimize this implementation!
-  for (; index < InputCount() - 1; ++index) {
-    ReplaceInput(index, InputAt(index + 1));
-  }
-  TrimInputCount(InputCount() - 1);
-}
-
-template <class B, class S>
-void GenericNode<B, S>::AppendUse(Use* use) {
-  use->next = NULL;
-  use->prev = last_use_;
-  if (last_use_ == NULL) {
-    first_use_ = use;
-  } else {
-    last_use_->next = use;
-  }
-  last_use_ = use;
-  ++use_count_;
-}
-
-template <class B, class S>
-void GenericNode<B, S>::RemoveUse(Use* use) {
-  if (last_use_ == use) {
-    last_use_ = use->prev;
-  }
-  if (use->prev != NULL) {
-    use->prev->next = use->next;
-  } else {
-    first_use_ = use->next;
-  }
-  if (use->next != NULL) {
-    use->next->prev = use->prev;
-  }
-  --use_count_;
-}
-
-template <class B, class S>
-inline bool GenericNode<B, S>::OwnedBy(GenericNode* owner) const {
-  return first_use_ != NULL && first_use_->from == owner &&
-         first_use_->next == NULL;
-}
-
-template <class B, class S>
-S* GenericNode<B, S>::New(Graph* graph, int input_count, S** inputs,
-                          bool has_extensible_inputs) {
-  size_t node_size = sizeof(GenericNode);
-  int reserve_input_count = has_extensible_inputs ? kDefaultReservedInputs : 0;
-  size_t inputs_size = (input_count + reserve_input_count) * sizeof(Input);
-  size_t uses_size = input_count * sizeof(Use);
-  int size = static_cast<int>(node_size + inputs_size + uses_size);
-  Zone* zone = graph->zone();
-  void* buffer = zone->New(size);
-  S* result = new (buffer) S(graph, input_count, reserve_input_count);
-  Input* input =
-      reinterpret_cast<Input*>(reinterpret_cast<char*>(buffer) + node_size);
-  Use* use =
-      reinterpret_cast<Use*>(reinterpret_cast<char*>(input) + inputs_size);
-
-  for (int current = 0; current < input_count; ++current) {
-    GenericNode* to = *inputs++;
-    input->to = to;
-    input->use = use;
-    use->input_index = current;
-    use->from = result;
-    to->AppendUse(use);
-    ++use;
-    ++input;
-  }
-  return result;
-}
-}
-}
-}  // namespace v8::internal::compiler
-
-#endif  // V8_COMPILER_GENERIC_NODE_INL_H_