Fix a register assignment bug in typed array stores without SSE3 available.

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 156 matching lines @@
   V(StoreNamedField)                           \
   V(StoreNamedGeneric)                         \
   V(StringAdd)                                 \
   V(StringCharCodeAt)                          \
   V(StringCharFromCode)                        \
   V(StringLength)                              \
   V(Sub)                                       \
   V(ThisFunction)                              \
   V(Throw)                                     \
   V(ToFastProperties)                          \
-  V(ToInt32)                                   \
   V(TransitionElementsKind)                    \
   V(Typeof)                                    \
   V(TypeofIsAndBranch)                         \
   V(UnaryMathOperation)                        \
   V(UnknownOSRValue)                           \
   V(UseConst)                                  \
   V(ValueOf)                                   \
   V(ForInPrepareMap)                           \
   V(ForInCacheArray)                           \
   V(CheckMapValue)                             \
@@ skipping 1048 matching lines @@
     return Representation::None();
   }
 
   DECLARE_CONCRETE_INSTRUCTION(ClampToUint8)
 
  protected:
   virtual bool DataEquals(HValue* other) { return true; }
 };
 
 
-class HToInt32: public HUnaryOperation {
- public:
-  explicit HToInt32(HValue* value)
-      : HUnaryOperation(value) {
-    set_representation(Representation::Integer32());
-    SetFlag(kUseGVN);
-    SetFlag(kTruncatingToInt32);
-  }
-
-  virtual Representation RequiredInputRepresentation(int index) {
-    return Representation::None();
-  }
-
-  virtual HValue* Canonicalize() {
-    if (value()->representation().IsInteger32()) {
-      return value();
-    } else {
-      return this;
-    }
-  }
-
-  DECLARE_CONCRETE_INSTRUCTION(ToInt32)
-
- protected:
-  virtual bool DataEquals(HValue* other) { return true; }
-};
-
-
 class HSimulate: public HInstruction {
  public:
   HSimulate(int ast_id, int pop_count)
       : ast_id_(ast_id),
         pop_count_(pop_count),
         values_(2),
         assigned_indexes_(2) {}
   virtual ~HSimulate() {}
 
   virtual void PrintDataTo(StringStream* stream);
@@ skipping 3520 matching lines @@
   DECLARE_CONCRETE_INSTRUCTION(LoadFieldByIndex);
 };
 
 
 #undef DECLARE_INSTRUCTION
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_INSTRUCTIONS_H_