Implement fixpoint iteration for escape analysis.

src/hydrogen-instructions.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 3209 matching lines @@
   // The values contain a list of all in-object properties inside the
   // captured object and is index by field index. Properties in the
   // properties or elements backing store are not tracked here.
   const ZoneList<HValue*>* values() const { return &values_; }
   int length() const { return values_.length(); }
   int capture_id() const { return capture_id_; }
 
   // Replay effects of this instruction on the given environment.
   void ReplayEnvironment(HEnvironment* env);
 
+  virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE;
+
   DECLARE_CONCRETE_INSTRUCTION(CapturedObject)
 
  private:
   int capture_id_;
 };
 
 
 class HConstant V8_FINAL : public HTemplateInstruction<0> {
  public:
   DECLARE_INSTRUCTION_FACTORY_P1(HConstant, int32_t);
@@ skipping 3604 matching lines @@
   virtual bool IsDeletable() const V8_OVERRIDE { return true; }
 };
 
 
 #undef DECLARE_INSTRUCTION
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_INSTRUCTIONS_H_