Elide hole checks on KeyedLoads of holey double arrays.

src/isolate.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 817 matching lines @@
   inline type* name() {                                                 \
     ASSERT(OFFSET_OF(Isolate, name##_) == name##_debug_offset_);        \
     return &(name##_)[0];                                               \
   }
   ISOLATE_INIT_ARRAY_LIST(GLOBAL_ARRAY_ACCESSOR)
 #undef GLOBAL_ARRAY_ACCESSOR
 
 #define NATIVE_CONTEXT_FIELD_ACCESSOR(index, type, name)            \
   Handle<type> name() {                                             \
     return Handle<type>(context()->native_context()->name(), this); \
+  }                                                                 \
+  bool is_##name(type* value) {                                     \
+    return context()->native_context()->is_##name(value);           \
   }
   NATIVE_CONTEXT_FIELDS(NATIVE_CONTEXT_FIELD_ACCESSOR)
 #undef NATIVE_CONTEXT_FIELD_ACCESSOR
 
   Bootstrapper* bootstrapper() { return bootstrapper_; }
   Counters* counters() {
     // Call InitializeLoggingAndCounters() if logging is needed before
     // the isolate is fully initialized.
     ASSERT(counters_ != NULL);
     return counters_;
@@ skipping 212 matching lines @@
     return date_cache_;
   }
 
   void set_date_cache(DateCache* date_cache) {
     if (date_cache != date_cache_) {
       delete date_cache_;
     }
     date_cache_ = date_cache;
   }
 
+  Map* get_initial_js_array_map(ElementsKind kind);
+
+  bool IsFastArrayConstructorPrototypeChainIntact();
+
   CodeStubInterfaceDescriptor*
       code_stub_interface_descriptor(int index);
 
   void IterateDeferredHandles(ObjectVisitor* visitor);
   void LinkDeferredHandles(DeferredHandles* deferred_handles);
   void UnlinkDeferredHandles(DeferredHandles* deferred_handles);
 
 #ifdef DEBUG
   bool IsDeferredHandle(Object** location);
 #endif  // DEBUG
@@ skipping 402 matching lines @@
 
 // Mark the native context with out of memory.
 inline void Context::mark_out_of_memory() {
   native_context()->set_out_of_memory(HEAP->true_value());
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_ISOLATE_H_