}
+static void GetMinInobjectSlack(Map* map, void* data) {
+ int slack = map->unused_property_fields();
+ if (*reinterpret_cast<int*>(data) > slack) {
+ *reinterpret_cast<int*>(data) = slack;
+ }
+}
+
+
+static void ShrinkInstanceSize(Map* map, void* data) {
+ int slack = *reinterpret_cast<int*>(data);
+ map->set_inobject_properties(map->inobject_properties() - slack);
+ map->set_unused_property_fields(map->unused_property_fields() - slack);
+ map->set_instance_size(map->instance_size() - slack * kPointerSize);
+
+ // Visitor id might depend on the instance size, recalculate it.
+ map->set_visitor_id(StaticVisitorBase::GetVisitorId(map));
+}
+
+
+void JSFunction::CompleteInobjectSlackTracking() {
+ DCHECK(has_initial_map());
+ Map* map = initial_map();
+
+ DCHECK(map->counter() >= Map::kSlackTrackingCounterEnd - 1);
+ map->set_counter(Map::kRetainingCounterStart);
+
+ int slack = map->unused_property_fields();
+ map->TraverseTransitionTree(&GetMinInobjectSlack, &slack);
+ if (slack != 0) {
+ // Resize the initial map and all maps in its transition tree.
+ map->TraverseTransitionTree(&ShrinkInstanceSize, &slack);
+ }
+}
+
+
void JSObject::OptimizeAsPrototype(Handle<JSObject> object,
PrototypeOptimizationMode mode) {
if (object->IsGlobalObject()) return;
// needed. At that point, a new initial map is created and the
// prototype is put into the initial map where it belongs.
function->set_prototype_or_initial_map(*value);
+ if (value->IsJSObject()) {
+ // Optimize as prototype to detach it from its transition tree.
+ JSObject::OptimizeAsPrototype(Handle<JSObject>::cast(value),
+ FAST_PROTOTYPE);
+ }
}
isolate->heap()->ClearInstanceofCache();
}
}
-static void GetMinInobjectSlack(Map* map, void* data) {
- int slack = map->unused_property_fields();
- if (*reinterpret_cast<int*>(data) > slack) {
- *reinterpret_cast<int*>(data) = slack;
- }
-}
-
-
-static void ShrinkInstanceSize(Map* map, void* data) {
- int slack = *reinterpret_cast<int*>(data);
- map->set_inobject_properties(map->inobject_properties() - slack);
- map->set_unused_property_fields(map->unused_property_fields() - slack);
- map->set_instance_size(map->instance_size() - slack * kPointerSize);
-
- // Visitor id might depend on the instance size, recalculate it.
- map->set_visitor_id(StaticVisitorBase::GetVisitorId(map));
-}
-
-
-void JSFunction::CompleteInobjectSlackTracking() {
- DCHECK(has_initial_map());
- Map* map = initial_map();
-
- DCHECK(map->counter() >= Map::kSlackTrackingCounterEnd - 1);
- map->set_counter(Map::kRetainingCounterStart);
-
- int slack = map->unused_property_fields();
- map->TraverseTransitionTree(&GetMinInobjectSlack, &slack);
- if (slack != 0) {
- // Resize the initial map and all maps in its transition tree.
- map->TraverseTransitionTree(&ShrinkInstanceSize, &slack);
- }
-}
-
-
int SharedFunctionInfo::SearchOptimizedCodeMap(Context* native_context,
BailoutId osr_ast_id) {
DisallowHeapAllocation no_gc;