1 /* { dg-do run } */
2 /* { dg-additional-options "-ftree-vectorize" } */
3 
4 unsigned a[1024];
5 unsigned b[1024];
6 
7 void __attribute__((noipa))
foo(unsigned * q,unsigned * r)8 foo (unsigned *q, unsigned *r)
9 {
10   unsigned sum1 = 0, sum2 = 0;
11   for (int i = 0; i < 512; ++i)
12     {
13       sum1 += a[2*i];
14       sum2 += a[2*i+1];
15       b[2*i] = a[2*i+1];
16       b[2*i+1] = a[2*i];
17     }
18   *q = sum1;
19   *r = sum2;
20 }
21 
main()22 int main()
23 {
24   unsigned sum1, sum2;
25   a[0] = 0;
26   a[1] = 1;
27   foo (&sum1, &sum2);
28   if (b[0] != 1 || b[1] != 0)
29     __builtin_abort ();
30   return 0;
31 }
32