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_SIMPLIFIED_LOWERING_H_
6#define V8_COMPILER_SIMPLIFIED_LOWERING_H_
7
8#include "src/compiler/js-graph.h"
9#include "src/compiler/machine-operator.h"
10#include "src/compiler/node.h"
11#include "src/compiler/simplified-operator.h"
12
13namespace v8 {
14namespace internal {
15namespace compiler {
16
17class SimplifiedLowering {
18 public:
19  explicit SimplifiedLowering(JSGraph* jsgraph) : jsgraph_(jsgraph) {}
20  virtual ~SimplifiedLowering() {}
21
22  void LowerAllNodes();
23
24  // TODO(titzer): These are exposed for direct testing. Use a friend class.
25  void DoLoadField(Node* node);
26  void DoStoreField(Node* node);
27  void DoLoadElement(Node* node);
28  void DoStoreElement(Node* node);
29  void DoStringAdd(Node* node);
30  void DoStringEqual(Node* node);
31  void DoStringLessThan(Node* node);
32  void DoStringLessThanOrEqual(Node* node);
33
34 private:
35  JSGraph* jsgraph_;
36
37  Node* SmiTag(Node* node);
38  Node* IsTagged(Node* node);
39  Node* Untag(Node* node);
40  Node* OffsetMinusTagConstant(int32_t offset);
41  Node* ComputeIndex(const ElementAccess& access, Node* index);
42  Node* StringComparison(Node* node, bool requires_ordering);
43
44  friend class RepresentationSelector;
45
46  Zone* zone() { return jsgraph_->zone(); }
47  JSGraph* jsgraph() { return jsgraph_; }
48  Graph* graph() { return jsgraph()->graph(); }
49  CommonOperatorBuilder* common() { return jsgraph()->common(); }
50  MachineOperatorBuilder* machine() { return jsgraph()->machine(); }
51};
52
53}  // namespace compiler
54}  // namespace internal
55}  // namespace v8
56
57#endif  // V8_COMPILER_SIMPLIFIED_LOWERING_H_
58