[thirdparty/gcc.git] / gcc / testsuite / gcc.dg / pr44838.c

/* PR rtl-optimization/44838 */
/* { dg-do run } */
/* { dg-options "-O2 -funroll-loops" } */

extern void abort ();

void
foo (int *a, int n)
{
  int *lasta = a + n;
  for (; a != lasta; a++)
    {
      *a *= 2;
      a[1] = a[-1] + a[-2];
    }
}

int a[16];
int ref[16] = { 0, 1, 4, 2, 10, 12, 24, 44,
                72, 136, 232, 416, 736, 1296, 2304, 2032 };

int
main ()
{
  int i;
  for (i = 0; i < 16; i++)
    a[i] = i;
  foo (a + 2, 16 - 3);
  for (i = 0; i < 16; i++)
    if (ref[i] != a[i])
      abort ();
  return 0;
}
Commit	Line	Data
02de68e1 L	1	/* PR rtl-optimization/44838 */
	2	/* { dg-do run } */
	3	/* { dg-options "-O2 -funroll-loops" } */
	4
	5	extern void abort ();
	6
	7	void
	8	foo (int *a, int n)
	9	{
	10	int *lasta = a + n;
	11	for (; a != lasta; a++)
	12	{
	13	a = 2;
	14	a[1] = a[-1] + a[-2];
	15	}
	16	}
	17
	18	int a[16];
	19	int ref[16] = { 0, 1, 4, 2, 10, 12, 24, 44,
	20	72, 136, 232, 416, 736, 1296, 2304, 2032 };
	21
	22	int
	23	main ()
	24	{
	25	int i;
	26	for (i = 0; i < 16; i++)
	27	a[i] = i;
	28	foo (a + 2, 16 - 3);
	29	for (i = 0; i < 16; i++)
	30	if (ref[i] != a[i])
	31	abort ();
	32	return 0;
	33	}