re PR middle-end/6247 (Konqueror miscompilation on IA-32)

PR middle-end/6247
	* g++.dg/opt/cleanup1.C: New test.

	* g++.dg/opt/const1.C: New test.

From-SVN: r52146
This commit is contained in:
Jakub Jelinek 2002-04-10 23:49:26 +02:00 committed by Jakub Jelinek
parent 880f8c16ad
commit dab550cb99
3 changed files with 306 additions and 0 deletions

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2002-04-10 Jakub Jelinek <jakub@redhat.com>
PR middle-end/6247
* g++.dg/opt/cleanup1.C: New test.
* g++.dg/opt/const1.C: New test.
2002-04-10 Lars Brinkhoff <lars@nocrew.org>
* gcc.c-torture/execute/20020406-1.c: Declare malloc.

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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.
// { 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::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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// This testcase was miscompiled on IA-64 to read from unitialized memory
// and dereference it.
// { dg-do run }
// { dg-options "-O2" }
struct A
{
A () { a = 1; }
void a1 () { a++; }
bool a2 () { return !--a; }
unsigned int a;
};
struct B {};
template <class T> struct C
{
C () {}
C (const T& t) : c (t) {}
C<T> *next, *prev;
T c;
};
template <class T> struct D
{
C<T> *d;
D () : d (0) {}
D (C<T> *x) : d (x) {}
D (const D<T>& x) : d (x.d) {}
bool operator!= (const D<T>& x) const { return d != x.d; }
const T& operator* () const { return d->c; }
D<T> operator++ (int) { D<T> t = *this; d = d->next; return t; }
};
template <class T> struct E
{
C<T> *e;
E () : e (0) {}
E (C<T> *p) : e (p) {}
E (const E<T>& x) : e (x.e) {}
E (const D<T>& x) : e (x.e) {}
bool operator!= (const E<T>& x) const { return e != x.e; }
const T& operator* () const { return e->c; }
E<T>& operator++ () { e = e->next; return *this; }
};
template <class T> struct F : public A
{
C<T> *f;
unsigned long f0;
F () { f = new C<T>; f->next = f->prev = f; f0 = 0; }
F (const F<T>& x) : A ()
{
f = new C<T>; f->next = f->prev = f; f0 = 0;
D<T> b (x.f->next), e (x.f), i (f);
while (b != e)
f1 (i, *b++);
}
~F ()
{
C<T> *p = f->next;
while (p != f)
{
C<T> *x = p->next;
delete p;
p = x;
}
delete f;
}
D<T> f1 (D<T> x, const T& y)
{
C<T> *p = new C<T> (y);
p->next = x.d;
p->prev = x.d->prev;
x.d->prev->next = p;
x.d->prev = p;
f0++;
return p;
}
};
template <class T> struct G
{
F<T> *g;
G () { g = new F<T>; }
G (const G<T>& x) { g = x.g; g->a1 (); }
~G () {}
G<T>& operator= (const G<T>& x) { x.g->a1 (); g = x.g; return *this; }
D<T> g1 () { g4 (); return D<T> (g->f); }
E<T> g1 () const { return E<T> (g->f); }
E<T> g2 () const { return E<T> (g->f->next); }
D<T> g3 (const T& x) { g4 (); return g->f1 (g1 (), x); }
void g4 () { if (g->a > 1) { g->a2 (); g = new F<T> (*g); } }
G<T> operator+ (const G<T>& x) const
{
G<T> x2 (*this);
for (E<T> i = x.g2 (); i != x.g1 (); ++i)
x2.g3 (*i);
return x2;
}
G<T>& operator+= (const G<T>& x)
{
for (E<T> i = x.g2 (); i != x.g1 (); ++i)
g3 (*i);
return *this;
}
};
struct H : public G<B>
{
H () {}
H (const H& x) : G<B> (x) {}
H (const G<B>& x) : G<B> (x) {}
};
void foo ();
int
main ()
{
H a = H () + H ();
a += H ();
H b;
b = H () + H ();
}