[runtime] Store constructor function index on primitive maps.

src/hydrogen-instructions.h

 // Copyright 2012 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.
 
 #ifndef V8_HYDROGEN_INSTRUCTIONS_H_
 #define V8_HYDROGEN_INSTRUCTIONS_H_
 
 #include <cstring>
 #include <iosfwd>
 
@@ skipping 6088 matching lines @@
 
   static HObjectAccess ForPrototype() {
     return HObjectAccess(kMaps, Map::kPrototypeOffset);
   }
 
   static HObjectAccess ForMapAsInteger32() {
     return HObjectAccess(kMaps, JSObject::kMapOffset,
                          Representation::Integer32());
   }
 
-  static HObjectAccess ForMapInObjectProperties() {
-    return HObjectAccess(kInobject,
-                         Map::kInObjectPropertiesOffset,
-                         Representation::UInteger8());
+  static HObjectAccess ForMapInObjectPropertiesOrConstructorFunctionIndex() {
+    return HObjectAccess(
+        kInobject, Map::kInObjectPropertiesOrConstructorFunctionIndexOffset,
+        Representation::UInteger8());
   }
 
   static HObjectAccess ForMapInstanceType() {
     return HObjectAccess(kInobject,
                          Map::kInstanceTypeOffset,
                          Representation::UInteger8());
   }
 
   static HObjectAccess ForMapInstanceSize() {
     return HObjectAccess(kInobject,
@@ skipping 1938 matching lines @@
 };
 
 
 
 #undef DECLARE_INSTRUCTION
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_INSTRUCTIONS_H_