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// PR middle-end/6247
// This testcase was miscompiled on IA-32 because a single stack slot
// was used for 2 different variables at the same time.
// The function H::h1 was miscompiled.
// { dg-do run }
// { dg-options "-O2" }
extern "C" void abort (void);
extern "C" void exit (int);
struct A
{
A () { a = 1; }
void a1 () { a++; }
bool a2 () { return !--a; }
unsigned int a;
};
struct B : public A
{
B () : b (0) { a1 (); }
void b1 ();
const char *b;
};
struct C
{
C ();
C (const C &);
~C () { if (c->a2 ()) { if (c == c0) c0 = 0; c->b1 (); } }
C &operator= (const C &);
static C c1 (const char *x, int y = -1);
C (int, bool);
void a2 ();
B *c;
static B *c0;
};
B *C::c0 = __null;
template <class T> struct D
{
D (const T& t) : d (t) {}
D () {}
D<T> *next, *prev;
T d;
};
template<class T> struct E
{
D<T> *e;
E () : e (0) {}
E (D<T> *p) : e (p) {}
E (const E<T>& x) : e (x.e) {}
const T& operator* () const { return e->d; }
T& operator* () { return e->d; }
bool operator== (const E<T>& x) const { return e == x.e; }
bool operator!= (const E<T>& x) const { return e != x.e; }
E<T> operator++ (int) { E<T> x = *this; e = e->next; return x; }
};
template <class T> struct F : public A
{
F () { f = new D<T>; f->next = f->prev = f; f0 = 0; }
~F () {}
D<T> *f;
unsigned int f0;
F (const F<T>& x) : A ()
{
f = new D<T>; f->next = f->prev = f; f0 = 0;
E<T> b (x.f->next);
E<T> e (x.f);
E<T> i (f);
while (b != e)
f1 (i, *b++);
}
E<T> f1 (E<T> x, const T& y)
{
D<T> *p = new D<T> (y);
p->next = x.e;
p->prev = x.e->prev;
x.e->prev->next = p;
x.e->prev = p;
f0++;
return p;
}
};
template <class T> struct G
{
E<T> g1 () { g3 (); return E<T> (g->f); }
E<T> g2 (const T& x) { g3 (); return g->f1 (g1 (), x); }
void g3 () { if (g->a > 1) { g->a2 (); g = new F<T> (*g); } }
F<T>* g;
};
struct H
{
virtual ~H () {};
virtual void h1 ();
struct I
{
I () {}
I (C r, C p) : i1 (r), i2 (p) {}
C i1, i2;
};
G<I> h;
};
void H::h1 ()
{
h.g2 (I (C::c1 ("s1"), C::c1 ("t")));
h.g2 (I (C::c1 ("s2"), C::c1 ("t")));
h.g2 (I (C::c1 ("s3"), C::c1 ("t")));
}
void B::b1 ()
{
}
C C::c1 (const char *x, int y)
{
C z;
if (y != -1)
abort ();
z.c = new B;
z.c->b = x;
return z;
}
C::C () : c (__null)
{
}
C::C (const C &x)
{
c = x.c;
c->a1 ();
}
int main ()
{
H h;
h.h.g = new F<H::I> ();
h.h1 ();
if (h.h.g->f0 != 3)
abort ();
D<H::I> *p;
int i;
for (i = 0, p = h.h.g->f; i < 4; i++, p = p->next)
{
if (i == 0 && (p->d.i1.c != __null || p->d.i2.c != __null))
abort ();
if (i > 0
&& (p->d.i1.c->b[0] != 's'
|| p->d.i1.c->b[1] != '0' + i
|| p->d.i1.c->b[2] != '\0'
|| __builtin_strcmp (p->d.i2.c->b, "t")))
abort ();
if (p->prev->next != p)
abort ();
if (p->next->prev != p)
abort ();
if (i == 3 && p->next != h.h.g->f)
abort ();
}
exit (0);
}
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