Optimize simple constant cases for bitwise &, | and ^.

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.
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@@ skipping 3133 matching lines @@
       : HBitwiseBinaryOperation(context, left, right), op_(op) {
         ASSERT(op == Token::BIT_AND ||
                op == Token::BIT_OR ||
                op == Token::BIT_XOR);
       }
 
   Token::Value op() const { return op_; }
 
   virtual bool IsCommutative() const { return true; }
 
+  virtual HValue* Canonicalize();
+
   static HInstruction* NewHBitwise(Zone* zone,
                                    Token::Value op,
                                    HValue* context,
                                    HValue* left,
                                    HValue* right);
 
   DECLARE_CONCRETE_INSTRUCTION(Bitwise)
 
  protected:
   virtual bool DataEquals(HValue* other) {
@@ skipping 1335 matching lines @@
 
   DECLARE_CONCRETE_INSTRUCTION(In)
 };
 
 #undef DECLARE_INSTRUCTION
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_INSTRUCTIONS_H_