1
2extern void abort (void);
3
4static void
5foo (int *out, const int *lp, unsigned samples)
6{
7  int x, target;
8  for (x = 0, target = 0; x < (int)samples; x += 2, target++)
9    {
10      out[x] = lp[target];
11      out[x - 1] = out[x - 2] + out[x];
12    }
13}
14
15static void
16foo_novec (int *out, const int *lp, unsigned samples)
17{
18  int x, target;
19  for (x = 0, target = 0; x < (int)samples; x += 2, target++)
20    {
21      out[x] = lp[target];
22      out[x - 1] = out[x - 2] + out[x];
23      __asm__ volatile ("" : : : "memory");
24    }
25}
26
27int main(void)
28{
29  const int lp[25] = {
30      0, 2, 4, 6, 8,
31      10, 12, 14, 16,
32      18, 20, 22, 24,
33      26, 28, 30, 32,
34      34, 36, 38, 40,
35      42, 44, 46, 48,
36  };
37  int out[49] = {0};
38  int out2[49] = {0};
39  int s;
40
41  foo (out + 2, lp + 1, 48);
42  foo_novec (out2 + 2, lp + 1, 48);
43
44  for (s = 0; s < 49; s++)
45    if (out[s] != out2[s])
46      abort ();
47
48  return 0;
49}
50
51/* { dg-final { cleanup-tree-dump "vect" } } */
52