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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/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);
     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