[strong] Disallow implicit conversions for comparison

src/ic/ic.h

 // Copyright 2012 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_IC_H_
 #define V8_IC_H_
 
 #include "src/ic/ic-state.h"
 #include "src/macro-assembler.h"
 
@@ skipping 685 matching lines @@
   CompareIC(Isolate* isolate, Token::Value op)
       : IC(EXTRA_CALL_FRAME, isolate), op_(op) {}
 
   // Update the inline cache for the given operands.
   Code* UpdateCaches(Handle<Object> x, Handle<Object> y);
 
   // Helper function for computing the condition for a compare operation.
   static Condition ComputeCondition(Token::Value op);
 
   // Factory method for getting an uninitialized compare stub.
-  static Handle<Code> GetUninitialized(Isolate* isolate, Token::Value op);
+  static Handle<Code> GetUninitialized(Isolate* isolate, Token::Value op,
+                                       bool strong);
 
  private:
   static bool HasInlinedSmiCode(Address address);
 
   bool strict() const { return op_ == Token::EQ_STRICT; }
   Condition GetCondition() const { return ComputeCondition(op_); }
 
-  static Code* GetRawUninitialized(Isolate* isolate, Token::Value op);
+  static Code* GetRawUninitialized(Isolate* isolate, Token::Value op,
+                                   bool strong);
 
   static void Clear(Isolate* isolate, Address address, Code* target,
                     ConstantPoolArray* constant_pool);
 
   Token::Value op_;
 
   friend class IC;
 };
 
 
@@ skipping 41 matching lines @@
 
 // Support functions for interceptor handlers.
 DECLARE_RUNTIME_FUNCTION(LoadPropertyWithInterceptorOnly);
 DECLARE_RUNTIME_FUNCTION(LoadPropertyWithInterceptor);
 DECLARE_RUNTIME_FUNCTION(LoadElementWithInterceptor);
 DECLARE_RUNTIME_FUNCTION(StorePropertyWithInterceptor);
 }
 }  // namespace v8::internal
 
 #endif  // V8_IC_H_