Add support for \b and ^ and $ in multiline mode, completing Irregexp...

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 192 matching lines @@
   assembler_->CheckCharacterGT(limit, on_greater);
 }
 
 
 void RegExpMacroAssemblerTracer::CheckCharacter(uint32_t c, Label* on_equal) {
   PrintF(" CheckCharacter(c='u%04x', label[%08x]);\n", c, on_equal);
   assembler_->CheckCharacter(c, on_equal);
 }
 
 
+void RegExpMacroAssemblerTracer::CheckAtStart(Label* on_at_start) {
+  PrintF(" CheckAtStart(label[%08x]);\n", on_at_start);
+  assembler_->CheckAtStart(on_at_start);
+}
+
+
 void RegExpMacroAssemblerTracer::CheckNotAtStart(Label* on_not_at_start) {
   PrintF(" CheckNotAtStart(label[%08x]);\n", on_not_at_start);
   assembler_->CheckNotAtStart(on_not_at_start);
 }
 
 
 void RegExpMacroAssemblerTracer::CheckNotCharacter(uint32_t c,
                                                    Label* on_not_equal) {
   PrintF(" CheckNotCharacter(c='u%04x', label[%08x]);\n", c, on_not_equal);
   assembler_->CheckNotCharacter(c, on_not_equal);
@@ skipping 182 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