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_SIMPLIFIED_LOWERING_H_
  #define V8_COMPILER_SIMPLIFIED_LOWERING_H_
  
  #include "src/compiler/js-graph.h"
  #include "src/compiler/machine-operator.h"
  #include "src/compiler/node.h"
  #include "src/compiler/simplified-operator.h"
  
  namespace v8 {
  namespace internal {
  
  // Forward declarations.
  class TypeCache;
  
  
  namespace compiler {
  
  // Forward declarations.
  class RepresentationChanger;
  class SourcePositionTable;
  
  class SimplifiedLowering final {
   public:
    SimplifiedLowering(JSGraph* jsgraph, Zone* zone,
                       SourcePositionTable* source_positions);
    ~SimplifiedLowering() {}
  
    void LowerAllNodes();
  
    // TODO(turbofan): The representation can be removed once the result of the
    // representation analysis is stored in the node bounds.
    void DoLoadBuffer(Node* node, MachineRepresentation rep,
                      RepresentationChanger* changer);
    void DoStoreBuffer(Node* node);
    void DoShift(Node* node, Operator const* op, Type* rhs_type);
    void DoStringEqual(Node* node);
    void DoStringLessThan(Node* node);
    void DoStringLessThanOrEqual(Node* node);
  
    // TODO(bmeurer): This is a gigantic hack to support the gigantic LoadBuffer
    // typing hack to support the gigantic "asm.js should be fast without proper
    // verifier"-hack, ... Kill this! Soon! Really soon! I'm serious!
    bool abort_compilation_ = false;
  
   private:
    JSGraph* const jsgraph_;
    Zone* const zone_;
    TypeCache const& type_cache_;
  
    // TODO(danno): SimplifiedLowering shouldn't know anything about the source
    // positions table, but must for now since there currently is no other way to
    // pass down source position information to nodes created during
    // lowering. Once this phase becomes a vanilla reducer, it should get source
    // position information via the SourcePositionWrapper like all other reducers.
    SourcePositionTable* source_positions_;
  
    Node* StringComparison(Node* node);
    Node* Int32Div(Node* const node);
    Node* Int32Mod(Node* const node);
    Node* Uint32Div(Node* const node);
    Node* Uint32Mod(Node* const node);
  
    friend class RepresentationSelector;
  
    Isolate* isolate() { return jsgraph_->isolate(); }
    Zone* zone() { return jsgraph_->zone(); }
    JSGraph* jsgraph() { return jsgraph_; }
    Graph* graph() { return jsgraph()->graph(); }
    CommonOperatorBuilder* common() { return jsgraph()->common(); }
    MachineOperatorBuilder* machine() { return jsgraph()->machine(); }
  };
  
  }  // namespace compiler
  }  // namespace internal
  }  // namespace v8
  
  #endif  // V8_COMPILER_SIMPLIFIED_LOWERING_H_
  