src/data-flow.h

// Copyright 2010 the V8 project authors. All rights reserved.
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// modification, are permitted provided that the following conditions are
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#ifndef V8_DATAFLOW_H_
#define V8_DATAFLOW_H_

#include "ast.h"
#include "compiler.h"

namespace v8 {
namespace internal {

// This class is used to number all expressions in the AST according to
// their evaluation order (post-order left-to-right traversal).
class AstLabeler: public AstVisitor {
 public:
  AstLabeler() : next_number_(0) {}

  void Label(CompilationInfo* info);

 private:
  CompilationInfo* info() { return info_; }

  void VisitDeclarations(ZoneList<Declaration*>* decls);
  void VisitStatements(ZoneList<Statement*>* stmts);

  // AST node visit functions.
#define DECLARE_VISIT(type) virtual void Visit##type(type* node);
  AST_NODE_LIST(DECLARE_VISIT)
#undef DECLARE_VISIT

  // Traversal number for labelling AST nodes.
  int next_number_;

  CompilationInfo* info_;

  DISALLOW_COPY_AND_ASSIGN(AstLabeler);
};


} }  // namespace v8::internal

#endif  // V8_DATAFLOW_H_