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_MACHINE_OPERATOR_REDUCER_H_
6#define V8_COMPILER_MACHINE_OPERATOR_REDUCER_H_
7
8#include "src/compiler/graph-reducer.h"
9#include "src/compiler/machine-operator.h"
10
11namespace v8 {
12namespace internal {
13namespace compiler {
14
15// Forward declarations.
16class CommonOperatorBuilder;
17class JSGraph;
18
19
20// Performs constant folding and strength reduction on nodes that have
21// machine operators.
22class MachineOperatorReducer final : public Reducer {
23 public:
24  explicit MachineOperatorReducer(JSGraph* jsgraph);
25  ~MachineOperatorReducer();
26
27  Reduction Reduce(Node* node) override;
28
29 private:
30  Node* Float32Constant(volatile float value);
31  Node* Float64Constant(volatile double value);
32  Node* Int32Constant(int32_t value);
33  Node* Int64Constant(int64_t value);
34  Node* Uint32Constant(uint32_t value) {
35    return Int32Constant(bit_cast<uint32_t>(value));
36  }
37  Node* Word32And(Node* lhs, Node* rhs);
38  Node* Word32And(Node* lhs, uint32_t rhs) {
39    return Word32And(lhs, Uint32Constant(rhs));
40  }
41  Node* Word32Sar(Node* lhs, uint32_t rhs);
42  Node* Word32Shr(Node* lhs, uint32_t rhs);
43  Node* Word32Equal(Node* lhs, Node* rhs);
44  Node* Int32Add(Node* lhs, Node* rhs);
45  Node* Int32Sub(Node* lhs, Node* rhs);
46  Node* Int32Mul(Node* lhs, Node* rhs);
47  Node* Int32Div(Node* dividend, int32_t divisor);
48  Node* Uint32Div(Node* dividend, uint32_t divisor);
49
50  Reduction ReplaceBool(bool value) { return ReplaceInt32(value ? 1 : 0); }
51  Reduction ReplaceFloat32(volatile float value) {
52    return Replace(Float32Constant(value));
53  }
54  Reduction ReplaceFloat64(volatile double value) {
55    return Replace(Float64Constant(value));
56  }
57  Reduction ReplaceInt32(int32_t value) {
58    return Replace(Int32Constant(value));
59  }
60  Reduction ReplaceUint32(uint32_t value) {
61    return Replace(Uint32Constant(value));
62  }
63  Reduction ReplaceInt64(int64_t value) {
64    return Replace(Int64Constant(value));
65  }
66
67  Reduction ReduceInt32Add(Node* node);
68  Reduction ReduceInt32Sub(Node* node);
69  Reduction ReduceInt32Div(Node* node);
70  Reduction ReduceUint32Div(Node* node);
71  Reduction ReduceInt32Mod(Node* node);
72  Reduction ReduceUint32Mod(Node* node);
73  Reduction ReduceTruncateFloat64ToInt32(Node* node);
74  Reduction ReduceStore(Node* node);
75  Reduction ReduceProjection(size_t index, Node* node);
76  Reduction ReduceWord32Shifts(Node* node);
77  Reduction ReduceWord32Shl(Node* node);
78  Reduction ReduceWord32Sar(Node* node);
79  Reduction ReduceWord32And(Node* node);
80  Reduction ReduceWord32Or(Node* node);
81  Reduction ReduceFloat64InsertLowWord32(Node* node);
82  Reduction ReduceFloat64InsertHighWord32(Node* node);
83  Reduction ReduceFloat64Compare(Node* node);
84
85  Graph* graph() const;
86  JSGraph* jsgraph() const { return jsgraph_; }
87  CommonOperatorBuilder* common() const;
88  MachineOperatorBuilder* machine() const;
89
90  JSGraph* jsgraph_;
91};
92
93}  // namespace compiler
94}  // namespace internal
95}  // namespace v8
96
97#endif  // V8_COMPILER_MACHINE_OPERATOR_REDUCER_H_
98