Not consider the use representation in unintiliazed ArrayLiteral which always requires SMI

src/hydrogen.cc

Index: src/hydrogen.cc
===================================================================
--- src/hydrogen.cc	(revision 15397)
+++ src/hydrogen.cc	(working copy)
@@ -5768,7 +5768,9 @@
   Handle<Object> raw_boilerplate(literals->get(expr->literal_index()),
                                  isolate());
 
+  bool uninitialized= false;

[Jakob Kummerow, 2013/07/01 13:42:57]

nit: spaces around '='

   if (raw_boilerplate->IsUndefined()) {
+    uninitialized = true;
     raw_boilerplate = Runtime::CreateArrayLiteralBoilerplate(
         isolate(), literals, expr->constant_elements());
     if (raw_boilerplate.is_null()) {
@@ -5865,9 +5867,12 @@
       case FAST_HOLEY_ELEMENTS:
       case FAST_DOUBLE_ELEMENTS:
       case FAST_HOLEY_DOUBLE_ELEMENTS:
-        Add<HStoreKeyed>(elements, key, value,
-                         boilerplate_elements_kind);
-        break;
+        {

[Jakob Kummerow, 2013/07/01 13:42:57]

nit: the opening '{' can go on the line before, resulting in one level less
indentation

+          HStoreKeyed* instr = Add<HStoreKeyed>(elements, key, value,
+                                                boilerplate_elements_kind);
+          instr->SetUninitialized(uninitialized);
+          break;
+        }
       default:
         UNREACHABLE();
         break;