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 NON_EXPORTED_BASE(Reducer)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 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 Node* Word32And(Node* lhs, uint32_t rhs) { 48 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 Reduction ReplaceBool(bool value) { return ReplaceInt32(value ? 1 : 0); } 60 Reduction ReplaceFloat32(volatile float value) { 61 return Replace(Float32Constant(value)); 62 } 63 Reduction ReplaceFloat64(volatile double value) { 64 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 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_ 116