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

src/hydrogen-instructions.h

Index: src/hydrogen-instructions.h
===================================================================
--- src/hydrogen-instructions.h	(revision 10880)
+++ src/hydrogen-instructions.h	(working copy)
@@ -174,7 +174,6 @@
   V(ThisFunction)                              \
   V(Throw)                                     \
   V(ToFastProperties)                          \
-  V(ToInt32)                                   \
   V(TransitionElementsKind)                    \
   V(Typeof)                                    \
   V(TypeofIsAndBranch)                         \
@@ -1243,34 +1242,6 @@
 };
 
 
-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)