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/* PR optimization/5844
This testcase was miscompiled because of an rtx sharing bug. */
/* { dg-do run } */
/* { dg-options "-O2" } */
/* { dg-options "-O2 -mtune=i586" { target { { i?86-*-* x86_64-*-* } && ia32 } } } */
struct A
{
struct A *a;
int b;
};
struct B
{
struct A *c;
unsigned int d;
};
struct A p = { &p, -1 };
struct B q = { &p, 0 };
extern void abort (void);
extern void exit (int);
struct B *
foo (void)
{
return &q;
}
void
bar (void)
{
struct B *e = foo ();
struct A *f = e->c;
int g = f->b;
if (++g == 0)
{
e->d++;
e->c = f->a;
}
f->b = g;
}
int
main ()
{
bar ();
if (p.b != 0 || q.d != 1 || q.c != &p)
abort ();
exit (0);
}
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