[turbofan] Cache conversions inserted during typed lowering.

src/compiler/js-typed-lowering.h

 // 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_JS_TYPED_LOWERING_H_
 #define V8_COMPILER_JS_TYPED_LOWERING_H_
 
 #include "src/compiler/graph-reducer.h"
 #include "src/compiler/simplified-operator.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
 // Forward declarations.
 class CommonOperatorBuilder;
 class JSGraph;
 class JSOperatorBuilder;
 class MachineOperatorBuilder;
 
 
 // Lowers JS-level operators to simplified operators based on types.
 class JSTypedLowering FINAL : public Reducer {
  public:
-  explicit JSTypedLowering(JSGraph* jsgraph);
+  JSTypedLowering(JSGraph* jsgraph, Zone* zone);
   ~JSTypedLowering() FINAL {}
 
   Reduction Reduce(Node* node) FINAL;
 
  private:
   friend class JSBinopReduction;
 
   Reduction ReplaceEagerly(Node* old, Node* node);
   Reduction ReduceJSAdd(Node* node);
   Reduction ReduceJSBitwiseOr(Node* node);
   Reduction ReduceJSMultiply(Node* node);
   Reduction ReduceJSComparison(Node* node);
   Reduction ReduceJSLoadProperty(Node* node);
   Reduction ReduceJSStoreProperty(Node* node);
   Reduction ReduceJSLoadContext(Node* node);
   Reduction ReduceJSStoreContext(Node* node);
   Reduction ReduceJSEqual(Node* node, bool invert);
   Reduction ReduceJSStrictEqual(Node* node, bool invert);
   Reduction ReduceJSToBooleanInput(Node* input);
   Reduction ReduceJSToBoolean(Node* node);
   Reduction ReduceJSToNumberInput(Node* input);
   Reduction ReduceJSToNumber(Node* node);
   Reduction ReduceJSToStringInput(Node* input);
   Reduction ReduceJSToString(Node* node);
   Reduction ReduceNumberBinop(Node* node, const Operator* numberOp);
   Reduction ReduceInt32Binop(Node* node, const Operator* intOp);
   Reduction ReduceUI32Shift(Node* node, Signedness left_signedness,
                             const Operator* shift_op);
 
+  Node* ConvertToBoolean(Node* input);
+  Node* ConvertToNumber(Node* input);
+  template <IrOpcode::Value>
+  Node* FindConversion(Node* input);
+  void InsertConversion(Node* conversion);
+
   Node* Word32Shl(Node* const lhs, int32_t const rhs);
 
   Factory* factory() const;
   Graph* graph() const;
   JSGraph* jsgraph() const { return jsgraph_; }
   JSOperatorBuilder* javascript() const;
   CommonOperatorBuilder* common() const;
   SimplifiedOperatorBuilder* simplified() { return &simplified_; }
   MachineOperatorBuilder* machine() const;
 
   JSGraph* jsgraph_;
   SimplifiedOperatorBuilder simplified_;
+  ZoneVector<Node*> conversions_;  // Cache inserted JSToXXX() conversions.
   Type* zero_range_;
   Type* one_range_;
   Type* zero_thirtyone_range_;
   Type* shifted_int32_ranges_[4];
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_JS_TYPED_LOWERING_H_