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 {
15
16// Forward declarations.
17class TypeCache;
18
19
20namespace compiler {
21
22// Forward declarations.
23class RepresentationChanger;
24class SourcePositionTable;
25
26class SimplifiedLowering final {
27 public:
28  SimplifiedLowering(JSGraph* jsgraph, Zone* zone,
29                     SourcePositionTable* source_positions);
30  ~SimplifiedLowering() {}
31
32  void LowerAllNodes();
33
34  // TODO(turbofan): The representation can be removed once the result of the
35  // representation analysis is stored in the node bounds.
36  void DoLoadBuffer(Node* node, MachineRepresentation rep,
37                    RepresentationChanger* changer);
38  void DoStoreBuffer(Node* node);
39  void DoObjectIsNumber(Node* node);
40  void DoObjectIsSmi(Node* node);
41  void DoShift(Node* node, Operator const* op, Type* rhs_type);
42  void DoStringEqual(Node* node);
43  void DoStringLessThan(Node* node);
44  void DoStringLessThanOrEqual(Node* node);
45
46 private:
47  JSGraph* const jsgraph_;
48  Zone* const zone_;
49  TypeCache const& type_cache_;
50
51  // TODO(danno): SimplifiedLowering shouldn't know anything about the source
52  // positions table, but must for now since there currently is no other way to
53  // pass down source position information to nodes created during
54  // lowering. Once this phase becomes a vanilla reducer, it should get source
55  // position information via the SourcePositionWrapper like all other reducers.
56  SourcePositionTable* source_positions_;
57
58  Node* StringComparison(Node* node);
59  Node* Int32Div(Node* const node);
60  Node* Int32Mod(Node* const node);
61  Node* Uint32Div(Node* const node);
62  Node* Uint32Mod(Node* const node);
63
64  friend class RepresentationSelector;
65
66  Isolate* isolate() { return jsgraph_->isolate(); }
67  Zone* zone() { return jsgraph_->zone(); }
68  JSGraph* jsgraph() { return jsgraph_; }
69  Graph* graph() { return jsgraph()->graph(); }
70  CommonOperatorBuilder* common() { return jsgraph()->common(); }
71  MachineOperatorBuilder* machine() { return jsgraph()->machine(); }
72};
73
74}  // namespace compiler
75}  // namespace internal
76}  // namespace v8
77
78#endif  // V8_COMPILER_SIMPLIFIED_LOWERING_H_
79