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/* Not prefetching when the step is loop variant. */
/* { dg-do compile } */
/* { dg-require-effective-target sse2 } */
/* { dg-options "-O3 -msse2 -fprefetch-loop-arrays -fdump-tree-aprefetch-details --param min-insn-to-prefetch-ratio=3 --param simultaneous-prefetches=10 -fdump-tree-aprefetch-details" } */
double data[16384];
void donot_prefetch_when_non_constant_step_is_variant(int step, int n)
{
int a;
int b;
for (a = 1; a < step; a++,step*=2) {
for (b = 0; b < n; b += 2 * step) {
int i = 2*(b + a);
int j = 2*(b + a + step);
data[j] = data[i];
data[j+1] = data[i+1];
}
}
}
/* { dg-final { scan-tree-dump "Not prefetching" "aprefetch" } } */
/* { dg-final { scan-tree-dump "loop variant step" "aprefetch" } } */
/* { dg-final { cleanup-tree-dump "aprefetch" } } */
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