Remove some unused stuff from regexp implementation.

src/jsregexp.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 5157 matching lines @@
     negated_ranges->Add(CharacterRange(from + 1, range.from() - 1));
     from = range.to();
     i++;
   }
   if (from < String::kMaxUtf16CodeUnit) {
     negated_ranges->Add(CharacterRange(from + 1, String::kMaxUtf16CodeUnit));
   }
 }
 
 
-
-// -------------------------------------------------------------------
-// Interest propagation
-
-
-RegExpNode* RegExpNode::TryGetSibling(NodeInfo* info) {
-  for (int i = 0; i < siblings_.length(); i++) {
-    RegExpNode* sibling = siblings_.Get(i);
-    if (sibling->info()->Matches(info))
-      return sibling;
-  }
-  return NULL;
-}
-
-
-RegExpNode* RegExpNode::EnsureSibling(NodeInfo* info, bool* cloned) {
-  ASSERT_EQ(false, *cloned);
-  siblings_.Ensure(this);
-  RegExpNode* result = TryGetSibling(info);
-  if (result != NULL) return result;
-  result = this->Clone();
-  NodeInfo* new_info = result->info();
-  new_info->ResetCompilationState();
-  new_info->AddFromPreceding(info);
-  AddSibling(result);
-  *cloned = true;
-  return result;
-}
-
-
-template <class C>
-static RegExpNode* PropagateToEndpoint(C* node, NodeInfo* info) {
-  NodeInfo full_info(*node->info());
-  full_info.AddFromPreceding(info);
-  bool cloned = false;
-  return RegExpNode::EnsureSibling(node, &full_info, &cloned);
-}
-
-
 // -------------------------------------------------------------------
 // Splay tree
 
 
 OutSet* OutSet::Extend(unsigned value) {
   if (Get(value))
     return this;
   if (successors() != NULL) {
     for (int i = 0; i < successors()->length(); i++) {
       OutSet* successor = successors()->at(i);
@@ skipping 544 matching lines @@
   }
 
   return compiler.Assemble(&macro_assembler,
                            node,
                            data->capture_count,
                            pattern);
 }
 
 
 }}  // namespace v8::internal