| /* Not prefetching when the step is loop variant. */ |
| /* { dg-do compile } */ |
| /* { 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" } } */ |
| |
| |
