Fix bug introduced by my refactoring of bitwise HIR 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 3038 matching lines @@
                op == Token::BIT_XOR);
       }
 
   Token::Value op() const { return op_; }
 
   virtual bool IsCommutative() const { return true; }
 
   DECLARE_CONCRETE_INSTRUCTION(Bitwise)
 
  protected:
-  virtual bool DataEquals(HValue* other) { return true; }
+  virtual bool DataEquals(HValue* other) {
+    return op() == HBitwise::cast(other)->op();
+  }
 
   virtual Range* InferRange();
 
  private:
   Token::Value op_;
 };
 
 
 class HShl: public HBitwiseBinaryOperation {
  public:
@@ skipping 1212 matching lines @@
 
   DECLARE_CONCRETE_INSTRUCTION(In)
 };
 
 #undef DECLARE_INSTRUCTION
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_INSTRUCTIONS_H_