Microoptimizations to the way we get the current heap.

src/objects-inl.h

 // Copyright 2010 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 2844 matching lines @@
 
 Heap* Map::heap() {
   // NOTE: address() helper is not used to save one instruction.
   Heap* heap = Page::FromAddress(reinterpret_cast<Address>(this))->heap_;
   ASSERT(heap != NULL);
   ASSERT(heap->isolate() == Isolate::Current());
   return heap;
 }
 
 
+Heap* Code::heap() {
+  // NOTE: address() helper is not used to save one instruction.
+  Heap* heap = Page::FromAddress(reinterpret_cast<Address>(this))->heap_;
+  ASSERT(heap != NULL);
+  ASSERT(heap->isolate() == Isolate::Current());
+  return heap;
+}
+
+
+Isolate* Code::isolate() {
+  return heap()->isolate();
+}
+
+
+Heap* JSGlobalPropertyCell::heap() {
+  // NOTE: address() helper is not used to save one instruction.
+  Heap* heap = Page::FromAddress(reinterpret_cast<Address>(this))->heap_;
+  ASSERT(heap != NULL);
+  ASSERT(heap->isolate() == Isolate::Current());
+  return heap;
+}
+
+
+Isolate* JSGlobalPropertyCell::isolate() {
+  return heap()->isolate();
+}
+
+
 Object* Code::GetObjectFromEntryAddress(Address location_of_address) {
   return HeapObject::
       FromAddress(Memory::Address_at(location_of_address) - Code::kHeaderSize);
 }
 
 
 Object* Map::prototype() {
   return READ_FIELD(this, kPrototypeOffset);
 }
 
@@ skipping 1258 matching lines @@
 #undef WRITE_INT_FIELD
 #undef READ_SHORT_FIELD
 #undef WRITE_SHORT_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_INL_H_