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

src/objects-visiting.h

 // 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 97 matching lines @@
     kVisitStruct3,
     kVisitStruct4,
     kVisitStruct5,
     kVisitStruct6,
     kVisitStruct7,
     kVisitStruct8,
     kVisitStruct9,
     kVisitStructGeneric,
 
     kVisitConsString,
+    kVisitSlicedString,
     kVisitOddball,
     kVisitCode,
     kVisitMap,
     kVisitPropertyCell,
     kVisitSharedFunctionInfo,
     kVisitJSFunction,
     kVisitJSRegExp,
 
     kVisitorIdCount,
     kMinObjectSizeInWords = 2
@@ skipping 163 matching lines @@
     table_.Register(kVisitShortcutCandidate,
                     &FixedBodyVisitor<StaticVisitor,
                                       ConsString::BodyDescriptor,
                                       int>::Visit);
 
     table_.Register(kVisitConsString,
                     &FixedBodyVisitor<StaticVisitor,
                                       ConsString::BodyDescriptor,
                                       int>::Visit);
 
+    table_.Register(kVisitSlicedString,
+                    &FixedBodyVisitor<StaticVisitor,
+                                      SlicedString::BodyDescriptor,
+                                      int>::Visit);
+
     table_.Register(kVisitFixedArray,
                     &FlexibleBodyVisitor<StaticVisitor,
                                          FixedArray::BodyDescriptor,
                                          int>::Visit);
 
     table_.Register(kVisitFixedDoubleArray, &VisitFixedDoubleArray);
 
     table_.Register(kVisitGlobalContext,
                     &FixedBodyVisitor<StaticVisitor,
                                       Context::ScavengeBodyDescriptor,
@@ skipping 135 matching lines @@
 
   for (; !it.done(); it.next()) {
     it.rinfo()->template Visit<StaticVisitor>(heap);
   }
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_VISITING_H_