Check for empty repetitions.

src/regexp-macro-assembler-ia32.h

 // 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 68 matching lines @@
                                      const Vector<Label*>& destinations);
   virtual void DispatchHighByteMap(byte start,
                                    Label* byte_map,
                                    const Vector<Label*>& destinations);
   virtual void EmitOrLink(Label* label);
   virtual void Fail();
   virtual Handle<Object> GetCode(Handle<String> source);
   virtual void GoTo(Label* label);
   virtual void IfRegisterGE(int reg, int comparand, Label* if_ge);
   virtual void IfRegisterLT(int reg, int comparand, Label* if_lt);
+  virtual void IfRegisterEqPos(int reg, Label* if_eq);
   virtual IrregexpImplementation Implementation();
   virtual void LoadCurrentCharacter(int cp_offset,
                                     Label* on_end_of_input,
                                     bool check_bounds = true,
                                     int characters = 1);
   virtual void PopCurrentPosition();
   virtual void PopRegister(int register_index);
   virtual void PushBacktrack(Label* label);
   virtual void PushCurrentPosition();
   virtual void PushRegister(int register_index);
@@ skipping 113 matching lines @@
   Label backtrack_label_;
   Label exit_label_;
   Label check_preempt_label_;
   // Handle used to represent the generated code object itself.
   Handle<Object> self_;
 };
 
 }}  // namespace v8::internal
 
 #endif /* REGEXP_MACRO_ASSEMBLER_IA32_H_ */