1 /* Prefetching used to prefer nonsensical unroll factor of 5 in this testcase. */
2
3 /* { dg-do compile { target { i?86-*-* x86_64-*-* } } } */
4 /* { dg-options "-O2 -fprefetch-loop-arrays -march=amdfam10 -fdump-tree-aprefetch-details" } */
5
6 #define N 1000000
7
8 double a[N];
9
test(void)10 double test(void)
11 {
12 unsigned i;
13 double sum = 0;
14
15 for (i = 0; i < N; i += 2)
16 sum += (a[i] * a[i+1]);
17
18 return sum;
19 }
20
21 /* { dg-final { scan-tree-dump-times "unroll factor 4" 1 "aprefetch" } } */
22