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_CHANGE_LOWERING_H_
6#define V8_COMPILER_CHANGE_LOWERING_H_
7
8#include "src/compiler/graph-reducer.h"
9
10namespace v8 {
11namespace internal {
12namespace compiler {
13
14// Forward declarations.
15class CommonOperatorBuilder;
16class JSGraph;
17class Linkage;
18class MachineOperatorBuilder;
19
20class ChangeLowering FINAL : public Reducer {
21 public:
22  ChangeLowering(JSGraph* jsgraph, Linkage* linkage)
23      : jsgraph_(jsgraph), linkage_(linkage) {}
24  virtual ~ChangeLowering();
25
26  virtual Reduction Reduce(Node* node) OVERRIDE;
27
28 private:
29  Node* HeapNumberValueIndexConstant();
30  Node* SmiMaxValueConstant();
31  Node* SmiShiftBitsConstant();
32
33  Node* AllocateHeapNumberWithValue(Node* value, Node* control);
34  Node* ChangeSmiToInt32(Node* value);
35  Node* LoadHeapNumberValue(Node* value, Node* control);
36
37  Reduction ChangeBitToBool(Node* val, Node* control);
38  Reduction ChangeBoolToBit(Node* val);
39  Reduction ChangeFloat64ToTagged(Node* val, Node* control);
40  Reduction ChangeInt32ToTagged(Node* val, Node* control);
41  Reduction ChangeTaggedToFloat64(Node* val, Node* control);
42  Reduction ChangeTaggedToUI32(Node* val, Node* control, Signedness signedness);
43  Reduction ChangeUint32ToTagged(Node* val, Node* control);
44
45  Graph* graph() const;
46  Isolate* isolate() const;
47  JSGraph* jsgraph() const { return jsgraph_; }
48  Linkage* linkage() const { return linkage_; }
49  CommonOperatorBuilder* common() const;
50  MachineOperatorBuilder* machine() const;
51
52  JSGraph* jsgraph_;
53  Linkage* linkage_;
54};
55
56}  // namespace compiler
57}  // namespace internal
58}  // namespace v8
59
60#endif  // V8_COMPILER_CHANGE_LOWERING_H_
61