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/* 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" } } */