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/* { dg-do run } */
/* { dg-require-effective-target fpic } */
/* { dg-options "-O2 -fPIC" } */
void (*pfn)(void);
struct s
{
void** q;
int h;
int t;
int s;
};
void* f (struct s *, struct s *) __attribute__ ((noinline, regparm(1)));
void*
__attribute__ ((regparm(1)))
f (struct s *p, struct s *p2)
{
void *gp, *gp1;
int t, h, s, t2, h2, c, i;
if (p2->h == p2->t)
return 0;
(*pfn) ();
h = p->h;
t = p->t;
s = p->s;
h2 = p2->h;
t2 = p2->t;
gp = p2->q[h2++];
c = (t2 - h2) / 2;
for (i = 0; i != c; i++)
{
if (t == h || (h == 0 && t == s - 1))
break;
gp1 = p2->q[h2++];
p->q[t++] = gp1;
if (t == s)
t = 0;
}
p2->h = h2;
return gp;
}
static void gn () { }
int
main()
{
struct s s1, s2;
void *q[10];
pfn = gn;
s1.q = q;
s1.h = 0;
s1.t = 2;
s1.s = 4;
s2.q = q;
s2.h = 0;
s2.t = 4;
s2.s = 2;
f (&s1, &s2);
return 0;
}
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