Require typed input representation for HTypeof hydrogen instruction....

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 3055 matching lines @@
   bool pretenure_;
 };
 
 
 class HTypeof: public HUnaryOperation {
  public:
   explicit HTypeof(HValue* value) : HUnaryOperation(value) {
     set_representation(Representation::Tagged());
   }
 
+  virtual Representation RequiredInputRepresentation(int index) const {
+    return Representation::Tagged();
+  }
+
   DECLARE_CONCRETE_INSTRUCTION(Typeof, "typeof")
 };
 
 
 class HValueOf: public HUnaryOperation {
  public:
   explicit HValueOf(HValue* value) : HUnaryOperation(value) {
     set_representation(Representation::Tagged());
   }
 
@@ skipping 18 matching lines @@
   HValue* object() const { return left(); }
   HValue* key() const { return right(); }
 };
 
 #undef DECLARE_INSTRUCTION
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_INSTRUCTIONS_H_