Implement tracking and optimizations of packed arrays

src/objects-printer.cc

Index: src/objects-printer.cc
diff --git a/src/objects-printer.cc b/src/objects-printer.cc
index febdaabb12e0fa978a184db467a02522624765bb..3aea5f0aacf9c9b143fe0f679ee7a1df81d9eb00 100644
--- a/src/objects-printer.cc
+++ b/src/objects-printer.cc
@@ -318,7 +318,9 @@ void JSObject::PrintElements(FILE* out) {
   // Don't call GetElementsKind, its validation code can cause the printer to
   // fail when debugging.
   switch (map()->elements_kind()) {
-    case FAST_SMI_ONLY_ELEMENTS:
+    case FAST_HOLEY_SMI_ELEMENTS:
+    case FAST_SMI_ELEMENTS:
+    case FAST_HOLEY_ELEMENTS:
     case FAST_ELEMENTS: {
       // Print in array notation for non-sparse arrays.
       FixedArray* p = FixedArray::cast(elements());
@@ -329,6 +331,7 @@ void JSObject::PrintElements(FILE* out) {
       }
       break;
     }
+    case FAST_HOLEY_DOUBLE_ELEMENTS:
     case FAST_DOUBLE_ELEMENTS: {
       // Print in array notation for non-sparse arrays.
       if (elements()->length() > 0) {