[turbofan] Implement the implicit ToObject for property access.

src/objects.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/objects.h"
 
 #include <cmath>
 #include <iomanip>
 #include <sstream>
 
@@ skipping 1661 matching lines @@
     object->ShortPrint(file);
     PrintF(file, " from ");
     from_elements->ShortPrint(file);
     PrintF(file, " to ");
     to_elements->ShortPrint(file);
     PrintF(file, "\n");
   }
 }
 
 
+// static
+MaybeHandle<JSFunction> Map::GetConstructorFunction(
+    Handle<Map> map, Handle<Context> native_context) {
+  if (map->IsPrimitiveMap()) {
+    int const constructor_function_index = map->GetConstructorFunctionIndex();
+    if (constructor_function_index != kNoConstructorFunctionIndex) {
+      return handle(
+          JSFunction::cast(native_context->get(constructor_function_index)));
+    }
+  }
+  return MaybeHandle<JSFunction>();
+}
+
+
 void Map::PrintReconfiguration(FILE* file, int modify_index, PropertyKind kind,
                                PropertyAttributes attributes) {
   OFStream os(file);
   os << "[reconfiguring ";
   constructor_name()->PrintOn(file);
   os << "] ";
   Name* name = instance_descriptors()->GetKey(modify_index);
   if (name->IsString()) {
     String::cast(name)->PrintOn(file);
   } else {
@@ skipping 16158 matching lines @@
   if (cell->value() != *new_value) {
     cell->set_value(*new_value);
     Isolate* isolate = cell->GetIsolate();
     cell->dependent_code()->DeoptimizeDependentCodeGroup(
         isolate, DependentCode::kPropertyCellChangedGroup);
   }
 }
 
 }  // namespace internal
 }  // namespace v8