[Isolates] Merge (7083,7111] from bleeding_edge.

src/jsregexp.cc

 // Copyright 2006-2009 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 857 matching lines @@
   Trace new_trace;
   start->Emit(this, &new_trace);
   macro_assembler_->Bind(&fail);
   macro_assembler_->Fail();
   while (!work_list.is_empty()) {
     work_list.RemoveLast()->Emit(this, &new_trace);
   }
   if (reg_exp_too_big_) return IrregexpRegExpTooBig();
 
   Handle<Object> code = macro_assembler_->GetCode(pattern);
-
   work_list_ = NULL;
 #ifdef DEBUG
+  if (FLAG_print_code) {
+    Handle<Code>::cast(code)->Disassemble(*pattern->ToCString());
+  }
   if (FLAG_trace_regexp_assembler) {
     delete macro_assembler_;
   }
 #endif
   return RegExpEngine::CompilationResult(*code, next_register_);
 }
 
 
 bool Trace::DeferredAction::Mentions(int that) {
   if (type() == ActionNode::CLEAR_CAPTURES) {
@@ skipping 4464 matching lines @@
   }
 
   return compiler.Assemble(&macro_assembler,
                            node,
                            data->capture_count,
                            pattern);
 }
 
 
 }}  // namespace v8::internal