Tentative implementation of string slices (hidden under the flag --string-slices).

src/mark-compact.cc

 // Copyright 2011 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 372 matching lines @@
     table_.Register(kVisitShortcutCandidate,
                     &FixedBodyVisitor<StaticMarkingVisitor,
                                       ConsString::BodyDescriptor,
                                       void>::Visit);
 
     table_.Register(kVisitConsString,
                     &FixedBodyVisitor<StaticMarkingVisitor,
                                       ConsString::BodyDescriptor,
                                       void>::Visit);
 
+    table_.Register(kVisitSlicedString,
+                    &FixedBodyVisitor<StaticMarkingVisitor,
+                                      SlicedString::BodyDescriptor,
+                                      void>::Visit);
 
     table_.Register(kVisitFixedArray,
                     &FlexibleBodyVisitor<StaticMarkingVisitor,
                                          FixedArray::BodyDescriptor,
                                          void>::Visit);
 
     table_.Register(kVisitFixedDoubleArray, DataObjectVisitor::Visit);
 
     table_.Register(kVisitGlobalContext,
                     &FixedBodyVisitor<StaticMarkingVisitor,
@@ skipping 2868 matching lines @@
 }
 
 
 void MarkCompactCollector::Initialize() {
   StaticPointersToNewGenUpdatingVisitor::Initialize();
   StaticMarkingVisitor::Initialize();
 }
 
 
 } }  // namespace v8::internal