Use in-object fields instead of private symbols for regexp slots.

src/objects-inl.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.
 //
 // Review notes:
 //
 // - The use of macros in these inline functions may seem superfluous
 // but it is absolutely needed to make sure gcc generates optimal
 // code. gcc is not happy when attempting to inline too deep.
 //
@@ skipping 6754 matching lines @@
   CONDITIONAL_WRITE_BARRIER(GetHeap(), this, kLengthOffset, value, mode);
 }
 
 
 #ifdef VERIFY_HEAP
 ACCESSORS(JSTypedArray, raw_length, Object, kLengthOffset)
 #endif
 
 
 ACCESSORS(JSRegExp, data, Object, kDataOffset)
+ACCESSORS(JSRegExp, flags, Object, kFlagsOffset)
+ACCESSORS(JSRegExp, source, Object, kSourceOffset)
 
 
 JSRegExp::Type JSRegExp::TypeTag() {
   Object* data = this->data();
   if (data->IsUndefined()) return JSRegExp::NOT_COMPILED;
   Smi* smi = Smi::cast(FixedArray::cast(data)->get(kTagIndex));
   return static_cast<JSRegExp::Type>(smi->value());
 }
 
 
@@ skipping 1302 matching lines @@
 #undef WRITE_INT64_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 #undef NOBARRIER_READ_BYTE_FIELD
 #undef NOBARRIER_WRITE_BYTE_FIELD
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_OBJECTS_INL_H_