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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/base/compiler-specific.h"
9 : #include "src/compiler/graph-reducer.h"
10 : #include "src/compiler/machine-operator.h"
11 : #include "src/globals.h"
12 :
13 : namespace v8 {
14 : namespace internal {
15 : namespace compiler {
16 :
17 : // Forward declarations.
18 : class CommonOperatorBuilder;
19 : class JSGraph;
20 :
21 :
22 : // Performs constant folding and strength reduction on nodes that have
23 : // machine operators.
24 : class V8_EXPORT_PRIVATE MachineOperatorReducer final
25 : : public NON_EXPORTED_BASE(Reducer) {
26 : public:
27 : explicit MachineOperatorReducer(JSGraph* jsgraph,
28 : bool allow_signalling_nan = true);
29 : ~MachineOperatorReducer();
30 :
31 : Reduction Reduce(Node* node) override;
32 :
33 : private:
34 : Node* Float32Constant(volatile float value);
35 : Node* Float64Constant(volatile double value);
36 : Node* Int32Constant(int32_t value);
37 : Node* Int64Constant(int64_t value);
38 : Node* Uint32Constant(uint32_t value) {
39 : return Int32Constant(bit_cast<int32_t>(value));
40 : }
41 : Node* Uint64Constant(uint64_t value) {
42 246317 : return Int64Constant(bit_cast<int64_t>(value));
43 : }
44 : Node* Float64Mul(Node* lhs, Node* rhs);
45 : Node* Float64PowHalf(Node* value);
46 : Node* Word32And(Node* lhs, Node* rhs);
47 2480 : Node* Word32And(Node* lhs, uint32_t rhs) {
48 2480 : return Word32And(lhs, Uint32Constant(rhs));
49 : }
50 : Node* Word32Sar(Node* lhs, uint32_t rhs);
51 : Node* Word32Shr(Node* lhs, uint32_t rhs);
52 : Node* Word32Equal(Node* lhs, Node* rhs);
53 : Node* Int32Add(Node* lhs, Node* rhs);
54 : Node* Int32Sub(Node* lhs, Node* rhs);
55 : Node* Int32Mul(Node* lhs, Node* rhs);
56 : Node* Int32Div(Node* dividend, int32_t divisor);
57 : Node* Uint32Div(Node* dividend, uint32_t divisor);
58 :
59 129631 : Reduction ReplaceBool(bool value) { return ReplaceInt32(value ? 1 : 0); }
60 : Reduction ReplaceFloat32(volatile float value) {
61 92698 : return Replace(Float32Constant(value));
62 : }
63 : Reduction ReplaceFloat64(volatile double value) {
64 99647 : return Replace(Float64Constant(value));
65 : }
66 : Reduction ReplaceInt32(int32_t value) {
67 : return Replace(Int32Constant(value));
68 : }
69 : Reduction ReplaceUint32(uint32_t value) {
70 : return Replace(Uint32Constant(value));
71 : }
72 : Reduction ReplaceInt64(int64_t value) {
73 560777 : return Replace(Int64Constant(value));
74 : }
75 :
76 : Reduction ReduceInt32Add(Node* node);
77 : Reduction ReduceInt64Add(Node* node);
78 : Reduction ReduceInt32Sub(Node* node);
79 : Reduction ReduceInt64Sub(Node* node);
80 : Reduction ReduceInt32Div(Node* node);
81 : Reduction ReduceUint32Div(Node* node);
82 : Reduction ReduceInt32Mod(Node* node);
83 : Reduction ReduceUint32Mod(Node* node);
84 : Reduction ReduceStore(Node* node);
85 : Reduction ReduceProjection(size_t index, Node* node);
86 : Reduction ReduceWord32Shifts(Node* node);
87 : Reduction ReduceWord32Shl(Node* node);
88 : Reduction ReduceWord64Shl(Node* node);
89 : Reduction ReduceWord32Shr(Node* node);
90 : Reduction ReduceWord64Shr(Node* node);
91 : Reduction ReduceWord32Sar(Node* node);
92 : Reduction ReduceWord64Sar(Node* node);
93 : Reduction ReduceWord32And(Node* node);
94 : Reduction TryMatchWord32Ror(Node* node);
95 : Reduction ReduceWord32Or(Node* node);
96 : Reduction ReduceWord32Xor(Node* node);
97 : Reduction ReduceFloat64InsertLowWord32(Node* node);
98 : Reduction ReduceFloat64InsertHighWord32(Node* node);
99 : Reduction ReduceFloat64Compare(Node* node);
100 : Reduction ReduceFloat64RoundDown(Node* node);
101 :
102 : Graph* graph() const;
103 : JSGraph* jsgraph() const { return jsgraph_; }
104 : CommonOperatorBuilder* common() const;
105 : MachineOperatorBuilder* machine() const;
106 :
107 : JSGraph* jsgraph_;
108 : bool allow_signalling_nan_;
109 : };
110 :
111 : } // namespace compiler
112 : } // namespace internal
113 : } // namespace v8
114 :
115 : #endif // V8_COMPILER_MACHINE_OPERATOR_REDUCER_H_
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