[esnext] handle elements in FastObjectValuesOrEntries()

src/objects-inl.h

Index: src/objects-inl.h
diff --git a/src/objects-inl.h b/src/objects-inl.h
index 753c80e5bb4db517c0815dfee109e550448d3ad5..1b40b0b0442f84e2b9a04e515171dabb3be0cac2 100644
--- a/src/objects-inl.h
+++ b/src/objects-inl.h
@@ -7745,6 +7745,30 @@ static inline uint32_t ObjectAddressForHashing(void* object) {
   return value & MemoryChunk::kAlignmentMask;
 }
 
+static inline Handle<Object> MakeEntryPair(Isolate* isolate, uint32_t index,
+                                           Handle<Object> value) {
+  Handle<Object> key = isolate->factory()->Uint32ToString(index);
+  Handle<FixedArray> entry_storage =
+      isolate->factory()->NewUninitializedFixedArray(2);
+  {
+    entry_storage->set(0, *key, SKIP_WRITE_BARRIER);
+    entry_storage->set(1, *value, SKIP_WRITE_BARRIER);
+  }
+  return isolate->factory()->NewJSArrayWithElements(entry_storage,
+                                                    FAST_ELEMENTS, 2);
+}
+
+static inline Handle<Object> MakeEntryPair(Isolate* isolate, Handle<Name> key,
+                                           Handle<Object> value) {
+  Handle<FixedArray> entry_storage =
+      isolate->factory()->NewUninitializedFixedArray(2);
+  {
+    entry_storage->set(0, *key, SKIP_WRITE_BARRIER);
+    entry_storage->set(1, *value, SKIP_WRITE_BARRIER);
+  }
+  return isolate->factory()->NewJSArrayWithElements(entry_storage,
+                                                    FAST_ELEMENTS, 2);
+}
 
 #undef TYPE_CHECKER
 #undef CAST_ACCESSOR