Implement HChange support for Smis and use it in Load/StoreNameField

src/lithium.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 540 matching lines @@
     return spilled_double_registers_;
   }
   const ZoneList<LOperand*>* values() const { return &values_; }
   LEnvironment* outer() const { return outer_; }
   HEnterInlined* entry() { return entry_; }
 
   void AddValue(LOperand* operand,
                 Representation representation,
                 bool is_uint32) {
     values_.Add(operand, zone());
-    if (representation.IsTagged()) {
+    if (representation.IsSmiOrTagged()) {
       ASSERT(!is_uint32);
       is_tagged_.Add(values_.length() - 1);
     }
 
     if (is_uint32) {
       is_uint32_.Add(values_.length() - 1);
     }
   }
 
   bool HasTaggedValueAt(int index) const {
@@ skipping 199 matching lines @@
   NUMBER_CANDIDATE_IS_SMI,
   NUMBER_CANDIDATE_IS_SMI_OR_HOLE,
   NUMBER_CANDIDATE_IS_SMI_CONVERT_HOLE,
   NUMBER_CANDIDATE_IS_ANY_TAGGED
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_LITHIUM_H_