Subversion Repositories openrisc_me

// PR tree-optimization/27549

// { dg-do compile }

// { dg-options "-O2" }

typedef __SIZE_TYPE__ size_t;

struct E

{

  virtual ~E () {}

  virtual size_t e () const = 0;

  virtual void f (char *x) const = 0;

};

struct F : public E

{

  virtual ~F () {}

  virtual size_t e () const { return 0; }

  virtual void f (char *x) const { *x = '\0'; }

};

struct S

{

  S () { a = new char[32]; b = 32; c = 0; a[0] = 0; }

  void s (const char *x, size_t y) { v (c + y + 1); __builtin_memcpy(a + c, x, y); c += y; a[c] = '\0'; }

  void s (const E *x) { size_t l = x->e(); v (c + l + 1); x->f (a + c); c += l; }

  const char *t () { return a; }

  void v (size_t n)

    {

      if (b >= n) return;

      size_t b2 = b;

      char *a2 = a;

      for (;;)

        {

          b *= 2;

          if (b >= n)

            break;

        }

      a = new char[b];

      if (b2)

        {

          __builtin_memcpy(a, a2, c);

          a2[0] = 0;

          for (size_t i = 1; i < b2; i++)

            a2[i] = a2[i - 1];

          delete[] a2;

        }

    }

  ~S ()

    {

      if (b)

        {

          a[0] = 0;

          for (size_t i = 1; i < b; i++)

            a[i] = a[i - 1];

        }

      delete[] a;

    }

  char * a;

  size_t b, c;

};

const char *p;

size_t q;

const F u;

const char *

foo ()

{

  S s;

  s.s (p, q);

  s.s (&u);

  return s.t ();

}