Direct call to native RegExp code from JavaScript

src/objects.h

Index: src/objects.h
===================================================================
--- src/objects.h	(revision 3531)
+++ src/objects.h	(working copy)
@@ -3586,6 +3586,14 @@
   static const int kIrregexpCaptureCountIndex = kDataIndex + 3;
 
   static const int kIrregexpDataSize = kIrregexpCaptureCountIndex + 1;
+
+  // Offsets directly into the data fixed array.
+  static const int kDataTagOffset =
+      FixedArray::kHeaderSize + kTagIndex * kPointerSize;
+  static const int kDataAsciiCodeOffset =
+      FixedArray::kHeaderSize + kIrregexpASCIICodeIndex * kPointerSize;
+  static const int kIrregexpCaptureCountOffset =
+      FixedArray::kHeaderSize + kIrregexpCaptureCountIndex * kPointerSize;
 };