Implement materialization support for JSArray types.

src/deoptimizer.cc

Index: src/deoptimizer.cc
diff --git a/src/deoptimizer.cc b/src/deoptimizer.cc
index dc9ffc51186be1c5535297c6adf77f9efbf922b1..253815a94362f6d89bf8d90471e64637e8409891 100644
--- a/src/deoptimizer.cc
+++ b/src/deoptimizer.cc
@@ -1696,13 +1696,25 @@ Handle<Object> Deoptimizer::MaterializeNextHeapObject() {
         Handle<Object> properties = MaterializeNextValue();
         Handle<Object> elements = MaterializeNextValue();
         object->set_properties(FixedArray::cast(*properties));
-        object->set_elements(FixedArray::cast(*elements));
+        object->set_elements(FixedArrayBase::cast(*elements));
         for (int i = 0; i < length - 3; ++i) {
           Handle<Object> value = MaterializeNextValue();
           object->FastPropertyAtPut(i, *value);
         }
         break;
       }
+      case JS_ARRAY_TYPE: {
+        Handle<JSArray> object =
+            isolate_->factory()->NewJSArray(0, map->elements_kind());
+        materialized_objects_->Add(object);
+        Handle<Object> properties = MaterializeNextValue();
+        Handle<Object> elements = MaterializeNextValue();
+        Handle<Object> length = MaterializeNextValue();
+        object->set_properties(FixedArray::cast(*properties));
+        object->set_elements(FixedArrayBase::cast(*elements));
+        object->set_length(*length);
+        break;
+      }
       default:
         PrintF("[couldn't handle instance type %d]\n", map->instance_type());
         UNREACHABLE();