Implement clearing of CompareICs.

src/ic.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 776 matching lines @@
 
   // Factory method for getting an uninitialized compare stub.
   static Handle<Code> GetUninitialized(Token::Value op);
 
   // Helper function for computing the condition for a compare operation.
   static Condition ComputeCondition(Token::Value op);
 
   // Helper function for determining the state of a compare IC.
   static State ComputeState(Code* target);
 
+  // Helper function for determining the operation a compare IC is for.
+  static Token::Value ComputeOperation(Code* target);
+
   static const char* GetStateName(State state);
 
  private:
   State TargetState(State state, bool has_inlined_smi_code,
                     Handle<Object> x, Handle<Object> y);
 
   bool strict() const { return op_ == Token::EQ_STRICT; }
   Condition GetCondition() const { return ComputeCondition(op_); }
   State GetState() { return ComputeState(target()); }
 
+  static Code* initialize_stub(Token::Value op);
+
+  static void Clear(Address address, Code* target);
+
   Token::Value op_;
+
+  friend class IC;
 };
 
 
 class ToBooleanIC: public IC {
  public:
   explicit ToBooleanIC(Isolate* isolate) : IC(NO_EXTRA_FRAME, isolate) { }
 
   void patch(Code* code);
 };
 
 
 // Helper for BinaryOpIC and CompareIC.
-void PatchInlinedSmiCode(Address address);
+enum InlinedSmiCheck { ENABLE_INLINED_SMI_CHECK, DISABLE_INLINED_SMI_CHECK };
+void PatchInlinedSmiCode(Address address, InlinedSmiCheck check);
 
 } }  // namespace v8::internal
 
 #endif  // V8_IC_H_