When strings can change from an ASCII representation to a...

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 411 matching lines @@
   // Dispatch to the correct RegExp implementation.
 
   Handle<String> original_subject = subject;
   Handle<FixedArray> regexp(FixedArray::cast(jsregexp->data()));
   if (UseNativeRegexp()) {
 #ifdef ARM
     UNREACHABLE();
 #else
     RegExpMacroAssemblerIA32::Result res;
     do {
-      bool is_ascii = StringShape(*subject).IsAsciiRepresentation();
+      bool is_ascii = subject->IsAsciiRepresentation();
       if (!EnsureCompiledIrregexp(jsregexp, is_ascii)) {
         return Handle<Object>::null();
       }
       Handle<Code> code(RegExpImpl::IrregexpNativeCode(*regexp, is_ascii));
       res = RegExpMacroAssemblerIA32::Match(code,
                                             subject,
                                             offsets_vector,
                                             offsets.length(),
                                             previous_index);
       // If result is RETRY, the string have changed representation, and we
       // must restart from scratch.
     } while (res == RegExpMacroAssemblerIA32::RETRY);
     if (res == RegExpMacroAssemblerIA32::EXCEPTION) {
       ASSERT(Top::has_pending_exception());
       return Handle<Object>::null();
     }
     ASSERT(res == RegExpMacroAssemblerIA32::SUCCESS
         || res == RegExpMacroAssemblerIA32::FAILURE);
 
     rc = (res == RegExpMacroAssemblerIA32::SUCCESS);
 #endif
   } else {
-    bool is_ascii = StringShape(*subject).IsAsciiRepresentation();
+    bool is_ascii = subject->IsAsciiRepresentation();
     if (!EnsureCompiledIrregexp(jsregexp, is_ascii)) {
       return Handle<Object>::null();
     }
     for (int i = number_of_capture_registers - 1; i >= 0; i--) {
       offsets_vector[i] = -1;
     }
     Handle<ByteArray> byte_codes(IrregexpByteCode(*regexp, is_ascii));
 
     rc = IrregexpInterpreter::Match(byte_codes,
                                     subject,
@@ skipping 3988 matching lines @@
   EmbeddedVector<byte, 1024> codes;
   RegExpMacroAssemblerIrregexp macro_assembler(codes);
   return compiler.Assemble(&macro_assembler,
                            node,
                            data->capture_count,
                            pattern);
 }
 
 
 }}  // namespace v8::internal