Use finite-length end-anchored regexps to reduce part of regexp that is searched.

src/regexp-macro-assembler-tracer.cc

 // Copyright 2008 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 118 matching lines @@
   assembler_->PushRegister(register_index, check_stack_limit);
 }
 
 
 void RegExpMacroAssemblerTracer::AdvanceRegister(int reg, int by) {
   PrintF(" AdvanceRegister(register=%d, by=%d);\n", reg, by);
   assembler_->AdvanceRegister(reg, by);
 }
 
 
+void RegExpMacroAssemblerTracer::SetCurrentPositionFromEnd(int by) {
+  PrintF(" SetCurrentPositionFromEnd(by=%d);\n", by);
+  assembler_->SetCurrentPositionFromEnd(by);
+}
+
+
 void RegExpMacroAssemblerTracer::SetRegister(int register_index, int to) {
   PrintF(" SetRegister(register=%d, to=%d);\n", register_index, to);
   assembler_->SetRegister(register_index, to);
 }
 
 
 void RegExpMacroAssemblerTracer::WriteCurrentPositionToRegister(int reg,
                                                                 int cp_offset) {
   PrintF(" WriteCurrentPositionToRegister(register=%d,cp_offset=%d);\n",
          reg,
@@ skipping 209 matching lines @@
   return assembler_->Implementation();
 }
 
 
 Handle<Object> RegExpMacroAssemblerTracer::GetCode(Handle<String> source) {
   PrintF(" GetCode(%s);\n", *(source->ToCString()));
   return assembler_->GetCode(source);
 }
 
 }}  // namespace v8::internal