Make HTypeofIsAndBranch accept any representation input

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 4426 matching lines @@
 class HTypeofIsAndBranch V8_FINAL : public HUnaryControlInstruction {
  public:
   DECLARE_INSTRUCTION_FACTORY_P2(HTypeofIsAndBranch, HValue*, Handle<String>);
 
   Handle<String> type_literal() { return type_literal_; }
   virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE;
 
   DECLARE_CONCRETE_INSTRUCTION(TypeofIsAndBranch)
 
   virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE {
-    return Representation::Tagged();
+    return Representation::None();
   }
 
+  virtual HValue* Canonicalize() V8_OVERRIDE;
+
+  enum State {
+    kUnKnown,
+    kAlwaysTrue,
+    kAlwaysFalse
+  };
+
+  State state() { return state_; }
+
  private:
   HTypeofIsAndBranch(HValue* value, Handle<String> type_literal)
       : HUnaryControlInstruction(value, NULL, NULL),
-        type_literal_(type_literal) { }
+        type_literal_(type_literal), state_(kUnKnown) { }
 
   Handle<String> type_literal_;
+  State state_;
 };
 
 
 class HInstanceOf V8_FINAL : public HBinaryOperation {
  public:
   DECLARE_INSTRUCTION_WITH_CONTEXT_FACTORY_P2(HInstanceOf, HValue*, HValue*);
 
   virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE {
     return Representation::Tagged();
   }
@@ skipping 2724 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_