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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_JS_TYPED_LOWERING_H_
      6 #define V8_COMPILER_JS_TYPED_LOWERING_H_
      7 
      8 #include "src/compiler/graph-reducer.h"
      9 #include "src/compiler/js-graph.h"
     10 #include "src/compiler/machine-operator.h"
     11 #include "src/compiler/node.h"
     12 #include "src/compiler/simplified-operator.h"
     13 
     14 namespace v8 {
     15 namespace internal {
     16 namespace compiler {
     17 
     18 // Lowers JS-level operators to simplified operators based on types.
     19 class JSTypedLowering FINAL : public Reducer {
     20  public:
     21   explicit JSTypedLowering(JSGraph* jsgraph)
     22       : jsgraph_(jsgraph), simplified_(jsgraph->zone()) {}
     23   virtual ~JSTypedLowering();
     24 
     25   virtual Reduction Reduce(Node* node) OVERRIDE;
     26 
     27   JSGraph* jsgraph() { return jsgraph_; }
     28   Graph* graph() { return jsgraph_->graph(); }
     29   Zone* zone() { return jsgraph_->zone(); }
     30 
     31  private:
     32   friend class JSBinopReduction;
     33 
     34   Reduction ReplaceEagerly(Node* old, Node* node);
     35   Reduction ReplaceWith(Node* node) { return Reducer::Replace(node); }
     36   Reduction ReduceJSAdd(Node* node);
     37   Reduction ReduceJSComparison(Node* node);
     38   Reduction ReduceJSLoadProperty(Node* node);
     39   Reduction ReduceJSStoreProperty(Node* node);
     40   Reduction ReduceJSEqual(Node* node, bool invert);
     41   Reduction ReduceJSStrictEqual(Node* node, bool invert);
     42   Reduction ReduceJSToNumberInput(Node* input);
     43   Reduction ReduceJSToStringInput(Node* input);
     44   Reduction ReduceJSToBooleanInput(Node* input);
     45   Reduction ReduceNumberBinop(Node* node, const Operator* numberOp);
     46   Reduction ReduceI32Binop(Node* node, bool left_signed, bool right_signed,
     47                            const Operator* intOp);
     48   Reduction ReduceI32Shift(Node* node, bool left_signed,
     49                            const Operator* shift_op);
     50 
     51   JSOperatorBuilder* javascript() { return jsgraph_->javascript(); }
     52   CommonOperatorBuilder* common() { return jsgraph_->common(); }
     53   SimplifiedOperatorBuilder* simplified() { return &simplified_; }
     54   MachineOperatorBuilder* machine() { return jsgraph_->machine(); }
     55 
     56   JSGraph* jsgraph_;
     57   SimplifiedOperatorBuilder simplified_;
     58 };
     59 
     60 }  // namespace compiler
     61 }  // namespace internal
     62 }  // namespace v8
     63 
     64 #endif  // V8_COMPILER_JS_TYPED_LOWERING_H_
     65