Make not sucking at regexp the default...

src/jsregexp.h

 // Copyright 2006-2008 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 24 matching lines @@
 namespace internal {
 
 
 class RegExpMacroAssembler;
 
 
 class RegExpImpl {
  public:
   // Whether V8 is compiled with native regexp support or not.
   static bool UsesNativeRegExp() {
-#ifdef V8_NATIVE_REGEXP
+#ifdef V8_INTERPRETED_REGEXP
+    return false;
+#else
     return true;
-#else
-    return false;
 #endif
   }
 
   // Creates a regular expression literal in the old space.
   // This function calls the garbage collector if necessary.
   static Handle<Object> CreateRegExpLiteral(Handle<JSFunction> constructor,
                                             Handle<String> pattern,
                                             Handle<String> flags,
                                             bool* has_pending_exception);
 
@@ skipping 1395 matching lines @@
   int offsets_vector_length_;
   static int static_offsets_vector_[kStaticOffsetsVectorSize];
 
   friend class ExternalReference;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_JSREGEXP_H_