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// PR optimization/6713

// This testcase segfaulted on x86 because a dangling REG_EQUAL note

// resulted in incorrect substitutions later.

// { dg-do run }

// { dg-options "-O2" }

template class basic_iterator

{

  public:

    basic_iterator(_CharT* _p) : _M_current(_p) {}

    basic_iterator& operator++() { ++_M_current; return *this; }

    _CharT& operator*() const { return *_M_current; }

    bool operator!=(basic_iterator &_rhs) { return _M_current != _rhs._M_current; }

  private:

    _CharT* _M_current;

};

template class basic_string

{

  public:

    typedef unsigned int size_type;

    typedef basic_iterator<_CharT> iterator;

  private:

    struct _Rep

    {

      size_type _M_length;

      size_type _M_capacity;

      int _M_references;

      bool _M_is_leaked() const { return _M_references < 0; }

      bool _M_is_shared() const { return _M_references > 0; }

      void _M_set_leaked() { _M_references = -1; }

      void _M_set_sharable() { _M_references = 0; }

    };

    struct _Rep _M_rep;

    struct _Alloc_hider

    {

      _CharT _raw[16];

      _CharT* _M_p;

    };

    mutable _Alloc_hider _M_dataplus;

    _CharT* _M_data() const { return _M_dataplus._M_p; }

    void _M_leak() { if (!_M_rep._M_is_leaked()) _M_leak_hard(); }

    static int count;

    static void _M_leak_hard();

  public:

    explicit basic_string(const _CharT* __s);

    iterator begin() { _M_leak(); return iterator(_M_data()); }

    iterator end() { _M_leak(); return iterator(_M_data() + this->size()); }

    size_type size() const { return _M_rep._M_length; }

};

template basic_string<_CharT>::

basic_string(const _CharT* __s)

{

  int i;

  for (i=0; i<15; i++) {

    if (!__s[i])

      break;

    _M_dataplus._raw[i] = __s[i];

  }

  _M_dataplus._raw[i] = 0;

  _M_dataplus._M_p = _M_dataplus._raw;

  _M_rep._M_length = i;

  _M_rep._M_capacity = i;

  _M_rep._M_references = 1;

}

template int basic_string<_CharT>::count = 0;

template void basic_string<_CharT>::

_M_leak_hard()

{

  count++;

}

typedef basic_string string;

template int basic_string::count;

int isspa(int ch)

{

  return 0;

}

void foo(string& str)

{

  string::iterator it = str.begin();

  string::iterator stop = str.end();

  for (; it != stop; ++it)

    if (isspa(*it))

      break;

}

int main()

{

  string str("test");

  foo(str);

}