Constant-folding through HForceRepresentation fix.

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.
 //     * 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 1546 matching lines @@
 
   DECLARE_CONCRETE_INSTRUCTION(UseConst)
 
  private:
     explicit HUseConst(HValue* old_value) : HUnaryOperation(old_value) { }
 };
 
 
 class HForceRepresentation V8_FINAL : public HTemplateInstruction<1> {
  public:
-  DECLARE_INSTRUCTION_FACTORY_P2(HForceRepresentation, HValue*, Representation);
+  static HInstruction* New(Zone* zone, HValue* context, HValue* value,
+                           Representation required_representation);
 
   HValue* value() { return OperandAt(0); }
 
   virtual HValue* EnsureAndPropagateNotMinusZero(
       BitVector* visited) V8_OVERRIDE;
 
   virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE {
     return representation();  // Same as the output representation.
   }
 
@@ skipping 5747 matching lines @@
   virtual bool IsDeletable() const V8_OVERRIDE { return true; }
 };
 
 
 #undef DECLARE_INSTRUCTION
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_INSTRUCTIONS_H_