Active smi-only optimizations for large array literals.

src/arm/ic-arm.cc

Index: src/arm/ic-arm.cc
diff --git a/src/arm/ic-arm.cc b/src/arm/ic-arm.cc
index 34807c3e944d61711e680b16205d92ff430588b8..6e0badca1d764ac29a6734a447378d2ec3789ea6 100644
--- a/src/arm/ic-arm.cc
+++ b/src/arm/ic-arm.cc
@@ -1380,10 +1380,8 @@ void KeyedStoreIC::GenerateGeneric(MacroAssembler* masm,
   __ Ret();
 
   __ bind(&non_smi_value);
-  if (FLAG_smi_only_arrays) {
-    // Escape to slow case when writing non-smi into smi-only array.
-    __ CheckFastObjectElements(receiver_map, scratch_value, &slow);
-  }
+  // Escape to slow case when writing non-smi into smi-only array.
+  __ CheckFastObjectElements(receiver_map, scratch_value, &slow);
   // Fast elements array, store the value to the elements backing store.
   __ add(address, elements, Operand(FixedArray::kHeaderSize - kHeapObjectTag));
   __ add(address, address, Operand(key, LSL, kPointerSizeLog2 - kSmiTagSize));