Remove environment length from HSimulate instructions.

src/hydrogen-instructions.h

 // Copyright 2011 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 956 matching lines @@
         && to().Equals(change->to());
   }
 
  private:
   Representation from_;
 };
 
 
 class HSimulate: public HInstruction {
  public:
-  HSimulate(int ast_id, int pop_count, int environment_length)
+  HSimulate(int ast_id, int pop_count)
       : ast_id_(ast_id),
         pop_count_(pop_count),
-        environment_length_(environment_length),
         values_(2),
         assigned_indexes_(2) {}
   virtual ~HSimulate() {}
 
   virtual void PrintDataTo(StringStream* stream);
 
   bool HasAstId() const { return ast_id_ != AstNode::kNoNumber; }
   int ast_id() const { return ast_id_; }
   void set_ast_id(int id) {
     ASSERT(!HasAstId());
     ast_id_ = id;
   }
 
-  int environment_length() const { return environment_length_; }
   int pop_count() const { return pop_count_; }
   const ZoneList<HValue*>* values() const { return &values_; }
   int GetAssignedIndexAt(int index) const {
     ASSERT(HasAssignedIndexAt(index));
     return assigned_indexes_[index];
   }
   bool HasAssignedIndexAt(int index) const {
     return assigned_indexes_[index] != kNoIndex;
   }
   void AddAssignedValue(int index, HValue* value) {
@@ skipping 25 matching lines @@
   void AddValue(int index, HValue* value) {
     assigned_indexes_.Add(index);
     // Resize the list of pushed values.
     values_.Add(NULL);
     // Set the operand through the base method in HValue to make sure that the
     // use lists are correctly updated.
     SetOperandAt(values_.length() - 1, value);
   }
   int ast_id_;
   int pop_count_;
-  int environment_length_;
   ZoneList<HValue*> values_;
   ZoneList<int> assigned_indexes_;
 };
 
 
 class HStackCheck: public HTemplateInstruction<0> {
  public:
   HStackCheck() { }
 
   virtual Representation RequiredInputRepresentation(int index) const {
@@ skipping 2567 matching lines @@
   HValue* object() { return left(); }
   HValue* key() { return right(); }
 };
 
 #undef DECLARE_INSTRUCTION
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_INSTRUCTIONS_H_