| /* Prefetching used to prefer nonsensical unroll factor of 5 in this testcase. */ |
| |
| /* { dg-do compile { target i?86-*-* x86_64-*-* } } */ |
| /* { dg-require-effective-target ilp32 } */ |
| /* { dg-options "-O2 -fprefetch-loop-arrays -march=athlon -msse2 -mfpmath=sse -fdump-tree-aprefetch-details" } */ |
| |
| #define N 1000000 |
| |
| double a[N]; |
| |
| double test(void) |
| { |
| unsigned i; |
| double sum = 0; |
| |
| for (i = 0; i < N; i += 2) |
| sum += (a[i] * a[i+1]); |
| |
| return sum; |
| } |
| |
| /* { dg-final { scan-tree-dump-times "unroll factor 4" 1 "aprefetch" } } */ |
| /* { dg-final { cleanup-tree-dump "aprefetch" } } */ |
