1 // Copyright 2014 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_COMPILER_NODE_AUX_DATA_H_
6 #define V8_COMPILER_NODE_AUX_DATA_H_
7
8 #include "src/compiler/node.h"
9 #include "src/zone/zone-containers.h"
10
11 namespace v8 {
12 namespace internal {
13 namespace compiler {
14
15 // Forward declarations.
16 class Node;
17
18 template <class T, T def()>
19 class NodeAuxData {
20 public:
NodeAuxData(Zone * zone)21 explicit NodeAuxData(Zone* zone) : aux_data_(zone) {}
22
Set(Node * node,T const & data)23 void Set(Node* node, T const& data) {
24 size_t const id = node->id();
25 if (id >= aux_data_.size()) aux_data_.resize(id + 1, def());
26 aux_data_[id] = data;
27 }
28
Get(Node * node)29 T Get(Node* node) const {
30 size_t const id = node->id();
31 return (id < aux_data_.size()) ? aux_data_[id] : def();
32 }
33
34 class const_iterator;
35 friend class const_iterator;
36
37 const_iterator begin() const;
38 const_iterator end() const;
39
40 private:
41 ZoneVector<T> aux_data_;
42 };
43
44 template <class T, T def()>
45 class NodeAuxData<T, def>::const_iterator {
46 public:
47 typedef std::forward_iterator_tag iterator_category;
48 typedef int difference_type;
49 typedef std::pair<size_t, T> value_type;
50 typedef value_type* pointer;
51 typedef value_type& reference;
52
const_iterator(const ZoneVector<T> * data,size_t current)53 const_iterator(const ZoneVector<T>* data, size_t current)
54 : data_(data), current_(current) {}
const_iterator(const const_iterator & other)55 const_iterator(const const_iterator& other)
56 : data_(other.data_), current_(other.current_) {}
57
58 value_type operator*() const {
59 return std::make_pair(current_, (*data_)[current_]);
60 }
61 bool operator==(const const_iterator& other) const {
62 return current_ == other.current_ && data_ == other.data_;
63 }
64 bool operator!=(const const_iterator& other) const {
65 return !(*this == other);
66 }
67 const_iterator& operator++() {
68 ++current_;
69 return *this;
70 }
71 const_iterator operator++(int);
72
73 private:
74 const ZoneVector<T>* data_;
75 size_t current_;
76 };
77
78 template <class T, T def()>
begin()79 typename NodeAuxData<T, def>::const_iterator NodeAuxData<T, def>::begin()
80 const {
81 return typename NodeAuxData<T, def>::const_iterator(&aux_data_, 0);
82 }
83
84 template <class T, T def()>
end()85 typename NodeAuxData<T, def>::const_iterator NodeAuxData<T, def>::end() const {
86 return typename NodeAuxData<T, def>::const_iterator(&aux_data_,
87 aux_data_.size());
88 }
89
90 } // namespace compiler
91 } // namespace internal
92 } // namespace v8
93
94 #endif // V8_COMPILER_NODE_AUX_DATA_H_
95