ARM: Make use of d16-d31 when available.

src/isolate.cc

Index: src/isolate.cc
diff --git a/src/isolate.cc b/src/isolate.cc
index 7c06903ea917b14f75ec6288b5be4ec0b8f3403f..841e20f833e4dc85ac04d0d419149b1334841f75 100644
--- a/src/isolate.cc
+++ b/src/isolate.cc
@@ -1999,7 +1999,14 @@ bool Isolate::Init(Deserializer* des) {
   InitializeThreadLocal();
 
   bootstrapper_->Initialize(create_heap_objects);
-  builtins_.SetUp(create_heap_objects);
+
+  if (des == NULL && !Serializer::enabled()) {
+    builtins_.SetUp(Builtins::ALL);
+  } else if (des == NULL) {
+    builtins_.SetUp(Builtins::FOR_SNAPSHOT);
+  } else {
+    builtins_.SetUp(Builtins::BEFORE_DESERIALIZATION);
+  }
 
   // Only preallocate on the first initialization.
   if (FLAG_preallocate_message_memory && preallocated_message_space_ == NULL) {
@@ -2022,9 +2029,13 @@ bool Isolate::Init(Deserializer* des) {
 #endif
 
   // If we are deserializing, read the state into the now-empty heap.
-  if (!create_heap_objects) {
+  if (des) {
     des->Deserialize();
+
+    // Set up builtins that were not included in snapshot.
+    builtins_.SetUp(Builtins::AFTER_DESERIALIZATION);
   }
+
   stub_cache_->Initialize();
 
   // Finish initialization of ThreadLocal after deserialization is done.