Separate native and interpreted regexp by compile time flag, not runtime.

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 19 matching lines @@
 
 namespace v8 {
 namespace internal {
 
 
 class RegExpMacroAssembler;
 
 
 class RegExpImpl {
  public:
-  static inline bool UseNativeRegexp() {
-#ifdef V8_TARGET_ARCH_IA32
-    return FLAG_regexp_native;
+  // Whether V8 is compiled with native regexp support or not.
+  static bool UsesNativeRegExp() {
+#ifdef V8_NATIVE_REGEXP
+    return true;
 #else
-  return false;
+    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);
 
   // Returns a string representation of a regular expression.
   // Implements RegExp.prototype.toString, see ECMA-262 section 15.10.6.4.
   // This function calls the garbage collector if necessary.
@@ skipping 84 matching lines @@
   static void SetIrregexpMaxRegisterCount(FixedArray* re, int value);
   static int IrregexpNumberOfCaptures(FixedArray* re);
   static int IrregexpNumberOfRegisters(FixedArray* re);
   static ByteArray* IrregexpByteCode(FixedArray* re, bool is_ascii);
   static Code* IrregexpNativeCode(FixedArray* re, bool is_ascii);
 
  private:
   static String* last_ascii_string_;
   static String* two_byte_cached_string_;
 
-  static bool EnsureCompiledIrregexp(Handle<JSRegExp> re, bool is_ascii);
+  static bool CompileIrregexp(Handle<JSRegExp> re, bool is_ascii);
+  static inline bool EnsureCompiledIrregexp(Handle<JSRegExp> re, bool is_ascii);
 
 
   // Set the subject cache.  The previous string buffer is not deleted, so the
   // caller should ensure that it doesn't leak.
   static void SetSubjectCache(String* subject,
                               char* utf8_subject,
                               int uft8_length,
                               int character_position,
                               int utf8_position);
 
@@ skipping 1211 matching lines @@
                                    Handle<String> pattern,
                                    bool is_ascii);
 
   static void DotPrint(const char* label, RegExpNode* node, bool ignore_case);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_JSREGEXP_H_