text: // Copyright 2014 the V8 project authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  #ifndef V8_COMPILER_MACHINE_OPERATOR_REDUCER_H_
  #define V8_COMPILER_MACHINE_OPERATOR_REDUCER_H_
  
  #include "src/compiler/graph-reducer.h"
  #include "src/compiler/machine-operator.h"
  
  namespace v8 {
  namespace internal {
  namespace compiler {
  
  // Forward declarations.
  class CommonOperatorBuilder;
  class JSGraph;
  
  
  // Performs constant folding and strength reduction on nodes that have
  // machine operators.
  class MachineOperatorReducer final : public Reducer {
   public:
    explicit MachineOperatorReducer(JSGraph* jsgraph);
    ~MachineOperatorReducer();
  
    Reduction Reduce(Node* node) override;
  
   private:
    Node* Float32Constant(volatile float value);
    Node* Float64Constant(volatile double value);
    Node* Int32Constant(int32_t value);
    Node* Int64Constant(int64_t value);
    Node* Uint32Constant(uint32_t value) {
      return Int32Constant(bit_cast<uint32_t>(value));
    }
    Node* Word32And(Node* lhs, Node* rhs);
    Node* Word32And(Node* lhs, uint32_t rhs) {
      return Word32And(lhs, Uint32Constant(rhs));
    }
    Node* Word32Sar(Node* lhs, uint32_t rhs);
    Node* Word32Shr(Node* lhs, uint32_t rhs);
    Node* Word32Equal(Node* lhs, Node* rhs);
    Node* Int32Add(Node* lhs, Node* rhs);
    Node* Int32Sub(Node* lhs, Node* rhs);
    Node* Int32Mul(Node* lhs, Node* rhs);
    Node* Int32Div(Node* dividend, int32_t divisor);
    Node* Uint32Div(Node* dividend, uint32_t divisor);
  
    Reduction ReplaceBool(bool value) { return ReplaceInt32(value ? 1 : 0); }
    Reduction ReplaceFloat32(volatile float value) {
      return Replace(Float32Constant(value));
    }
    Reduction ReplaceFloat64(volatile double value) {
      return Replace(Float64Constant(value));
    }
    Reduction ReplaceInt32(int32_t value) {
      return Replace(Int32Constant(value));
    }
    Reduction ReplaceUint32(uint32_t value) {
      return Replace(Uint32Constant(value));
    }
    Reduction ReplaceInt64(int64_t value) {
      return Replace(Int64Constant(value));
    }
  
    Reduction ReduceInt32Add(Node* node);
    Reduction ReduceInt32Sub(Node* node);
    Reduction ReduceInt32Div(Node* node);
    Reduction ReduceUint32Div(Node* node);
    Reduction ReduceInt32Mod(Node* node);
    Reduction ReduceUint32Mod(Node* node);
    Reduction ReduceStore(Node* node);
    Reduction ReduceProjection(size_t index, Node* node);
    Reduction ReduceWord32Shifts(Node* node);
    Reduction ReduceWord32Shl(Node* node);
    Reduction ReduceWord32Sar(Node* node);
    Reduction ReduceWord32And(Node* node);
    Reduction ReduceWord32Or(Node* node);
    Reduction ReduceFloat64InsertLowWord32(Node* node);
    Reduction ReduceFloat64InsertHighWord32(Node* node);
    Reduction ReduceFloat64Compare(Node* node);
  
    Graph* graph() const;
    JSGraph* jsgraph() const { return jsgraph_; }
    CommonOperatorBuilder* common() const;
    MachineOperatorBuilder* machine() const;
  
    JSGraph* jsgraph_;
  };
  
  }  // namespace compiler
  }  // namespace internal
  }  // namespace v8
  
  #endif  // V8_COMPILER_MACHINE_OPERATOR_REDUCER_H_
  