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 11 namespace v8 { 12 namespace internal { 13 namespace compiler { 14 15 // Forward declarations. 16 class CommonOperatorBuilder; 17 class JSGraph; 18 19 20 // Performs constant folding and strength reduction on nodes that have 21 // machine operators. 22 class 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); Uint32Constant(uint32_t value)34 Node* Uint32Constant(uint32_t value) { 35 return Int32Constant(bit_cast<uint32_t>(value)); 36 } 37 Node* Word32And(Node* lhs, Node* rhs); Word32And(Node * lhs,uint32_t 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 ReplaceBool(bool value)50 Reduction ReplaceBool(bool value) { return ReplaceInt32(value ? 1 : 0); } ReplaceFloat32(volatile float value)51 Reduction ReplaceFloat32(volatile float value) { 52 return Replace(Float32Constant(value)); 53 } ReplaceFloat64(volatile double value)54 Reduction ReplaceFloat64(volatile double value) { 55 return Replace(Float64Constant(value)); 56 } ReplaceInt32(int32_t value)57 Reduction ReplaceInt32(int32_t value) { 58 return Replace(Int32Constant(value)); 59 } ReplaceUint32(uint32_t value)60 Reduction ReplaceUint32(uint32_t value) { 61 return Replace(Uint32Constant(value)); 62 } ReplaceInt64(int64_t value)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 ReduceStore(Node* node); 74 Reduction ReduceProjection(size_t index, Node* node); 75 Reduction ReduceWord32Shifts(Node* node); 76 Reduction ReduceWord32Shl(Node* node); 77 Reduction ReduceWord32Shr(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; jsgraph()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