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// PR optimization/12340

// Origin: Richard Guenther 

// Testcase by Eric Botcazou 

// This used to segfault on x86 because the loop optimizer wrongly

// interpreted a double assignment to a biv as a double increment,

// which subsequently fooled the unroller.

// { dg-do run }

// { dg-options "-O2 -fno-exceptions -funroll-loops" }

typedef __SIZE_TYPE__ size_t;

inline void* operator new(size_t, void* __p) throw() { return __p; }

inline void operator delete (void*, void*) throw() { };

class Loc;

class Interval;

template

class DomainBase

{

public:

  typedef typename DT::Domain_t Domain_t;

  typedef typename DT::Storage_t Storage_t;

  Domain_t &unwrap() { return *static_cast(this); }

  const Domain_t &unwrap() const {

    return *static_cast(const_cast *>(this));

  }

protected:

  Storage_t domain_m;

};

template

class Domain : public DomainBase

{

  typedef DomainBase
 Base_t;

public:

  typedef typename DT::Size_t Size_t;

  typedef typename DT::Element_t Element_t;

  typedef typename Base_t::Domain_t Domain_t;

  typedef typename Base_t::Storage_t Storage_t;

  Domain_t &operator[](int) { return this->unwrap(); }

  const Domain_t &operator[](int) const { return this->unwrap(); }

  template

  void setDomain(const T &newdom) {

    DT::setDomain(this->domain_m, newdom);

  }

  Element_t first() const { return DT::first(this->domain_m); }

  Size_t length() const { return DT::length(this->domain_m); }

  Size_t size() const { return length(); }

};

template

struct DomainTraits;

template<>

struct DomainTraits

{

  typedef int Size_t;

  typedef int Element_t;

  typedef Interval Domain_t;

  typedef Interval OneDomain_t;

  typedef Loc AskDomain_t;

  typedef int Storage_t[2];

  enum { dimensions = 1 };

  enum { wildcard = false };

  static int first(const Storage_t &d) { return d[0]; }

  static int length(const Storage_t &d) { return d[1]; }

  static OneDomain_t &getDomain(Domain_t &d, int) { return d; }

  static const OneDomain_t &getDomain(const Domain_t &d, int) { return d; }

  template

  static void setDomain(Storage_t &dom, const T &newdom) {

    dom[0] = newdom.first();

    dom[1] = newdom.length();

  }

  template

  static void setDomain(Storage_t &dom, const T1 &begval, const T2 &endval) {

    dom[0] = begval;

    dom[1] = (endval - begval + 1);

  }

};

class Interval : public Domain >

{

public:

  Interval(const Interval &a) : Domain >() {

    for (int i=0; i < DomainTraits::dimensions; ++i)

      DomainTraits::getDomain(*this, i).setDomain(

                                DomainTraits::getDomain(a, i));

  }

  Interval(int a) : Domain >()

  {

    DomainTraits::setDomain(domain_m, 0, a - 1);

  }

};

template<>

struct DomainTraits

{

  typedef int Size_t;

  typedef int Element_t;

  typedef Loc Domain_t;

  typedef Loc AskDomain_t;

  typedef Loc MultResult_t;

  typedef int Storage_t;

  static int first(int d) { return d; }

  template

  static void setDomain(int &dom, const T &newdom) {

    dom = DomainTraits::getFirst(newdom);

  }

};

template<>

struct DomainTraits

 {

  enum { dimensions = 1 };

  enum { wildcard = false };

  static int getPointDomain(int d, int) { return d; }

  static int getFirst(const int &d) { return d; }

};

class Loc : public Domain >

{

public:

  explicit Loc(const int &a) : Domain >() {

    for (int i=0; i < 1; ++i)

      (*this)[i].setDomain(DomainTraits::getPointDomain(a, 0));

  }

};

struct ElementProperties

{

  enum { hasTrivialDefaultConstructor = false };

  enum { hasTrivialDestructor = false };

  static void construct(double* addr)

  {

    new (addr) double();

  }

  static void construct(double* addr, const double& model)

  {

    new (addr) double(model);

  }

  static void destruct(double *addr) {}

};

class RefCounted

{

public:

  RefCounted() : count_m(0) {}

  void addReference() { ++count_m; }

  bool removeRefAndCheckGarbage()

  {

    return (--count_m == 0);

  }

private:

  int count_m;

};

class RefBlockController : public RefCounted

{

public:

  explicit RefBlockController(unsigned int size)

    : pBegin_m(0), pEnd_m(0), pEndOfStorage_m(0), dealloc_m(false)

  {

    reallocateStorage(size, false);

    if (!ElementProperties::hasTrivialDefaultConstructor)

      {

        for (double * pt = begin(); pt != end(); ++pt)

          ElementProperties::construct(pt);

      }

  }

  ~RefBlockController()

  {

    deleteStorage();

  }

  double *begin() const

  {

    return pBegin_m;

  }

  double *end() const

  {

    return pEnd_m;

  }

  bool isMine() const

  {

    return dealloc_m;

  }

private:

  void deleteStorage()

  {

    if (isMine() && pBegin_m != 0)

      {

        if (!ElementProperties::hasTrivialDestructor)

          for (double *pt = begin(); pt != end(); ++pt)

            ElementProperties::destruct(pt);

        char *tmp = reinterpret_cast(pBegin_m);

        delete [] tmp;

      }

  }

  void reallocateStorage(unsigned int newsize, bool copyold = false)

  {

    double *pBeginNew = 0;

    double *pEndNew = 0;

    double *pEndOfStorageNew = 0;

    if (newsize > 0)

      {

        int nsize = newsize * sizeof(double);

        char *tmp = new char[nsize];

        pBeginNew = reinterpret_cast(tmp);

        pEndNew = pBeginNew + newsize;

        pEndOfStorageNew = pBeginNew + (nsize / sizeof(double));

        if (copyold)

          {

            double * pOld = begin();

            double * pNew = pBeginNew;

            while (pOld != end() && pNew != pEndNew)

              ElementProperties::construct(pNew++,*pOld++);

          }

      }

    deleteStorage();

    pBegin_m = pBeginNew;

    pEnd_m = pEndNew;

    pEndOfStorage_m = pEndOfStorageNew;

    dealloc_m = true;

  }

  double *pBegin_m;

  double *pEnd_m;

  double *pEndOfStorage_m;

  bool dealloc_m;

};

class DataBlockController : public RefBlockController

{

public:

  explicit

  DataBlockController(unsigned int size)

    : RefBlockController(size), dataObjectPtr_m(new char), owned_m(true) {}

  ~DataBlockController()

  {

    if (owned_m) delete dataObjectPtr_m;

  }

private:

  mutable char *dataObjectPtr_m;

  bool owned_m;

};

class RefCountedPtr

{

public:

  RefCountedPtr(DataBlockController * const pT) : ptr_m(pT)

    { if (isValid()) ptr_m->addReference(); }

  ~RefCountedPtr() { invalidate(); }

  DataBlockController* operator->() const { return ptr_m; }

  void invalidate();

  bool isValid() const { return ptr_m != 0; }

private:

  friend class RefCountedBlockPtr;

  DataBlockController * ptr_m;

};

inline void RefCountedPtr::invalidate()

{

  if ( isValid() && ptr_m->removeRefAndCheckGarbage() )

    delete ptr_m;

  ptr_m = 0;

}

class RefCountedBlockPtr

{

public:

  explicit RefCountedBlockPtr(unsigned int size)

    : offset_m(0),

      blockControllerPtr_m(new DataBlockController(size)) {}

  int offset() const

  {

    return offset_m;

  }

  double *beginPointer() const

  {

    return blockControllerPtr_m->begin();

  }

  double *currentPointer() const

  {

    return beginPointer() + offset();

  }

protected:

  int offset_m;

  RefCountedPtr blockControllerPtr_m;

};

class DataBlockPtr : public RefCountedBlockPtr

{

public:

  explicit DataBlockPtr(unsigned int size) : RefCountedBlockPtr(size) {}

};

class Node

{

public:

  Node(const Interval &owned, const Interval &allocated)

    : domain_m(owned), allocated_m(allocated) {}

  const Interval &allocated() const { return allocated_m; }

private:

  Interval domain_m;

  Interval allocated_m;

};

class DomainLayout

{

public:

  explicit DomainLayout(const Interval &dom) : node_m(0, dom) {}

  const Interval &domain() const

  {

    return node_m.allocated();

  }

private:

  Node node_m;

};

class BrickBase

{

public:

  explicit BrickBase(const Interval &domain);

  int offset(const Loc &dom) const { return off_m + dom[0].first(); }

protected:

  DomainLayout layout_m;

  int firsts_m;

  int off_m;

};

BrickBase::BrickBase(const Interval &dom)

  : layout_m(dom)

{

  firsts_m = layout_m.domain()[0].first();

  off_m = -firsts_m;

}

class Engine : public BrickBase

{

public:

  explicit Engine(const Interval &dom)

  : BrickBase(dom), dataBlock_m(dom.size()), data_m(dataBlock_m.currentPointer()) {}

  double& operator()(const Loc &loc) const

  {

    return data_m[this->offset(loc)];

  }

private:

  DataBlockPtr dataBlock_m;

  double *data_m;

};

int main()

{

  Interval I(10);

  Engine A(I);

  for (int i = 0; i < 10; i++)

    A(Loc(i)) = 2.0 + i - i*i;

  return 0;

}