1 /* { dg-do compile { target i?86-*-* x86_64-*-* } } */
2 /* { dg-require-effective-target ilp32 } */
3 /* { dg-options "-O2 -fprefetch-loop-arrays -march=athlon -fdump-tree-aprefetch-details" } */
5 /* These are common idioms for writing variable-length arrays at the end
6 of structures. We should not deduce anything about the number of iterations
7 of the loops from them. */
15 int loop0 (int n
, struct tail0
*x
)
19 for (i
= 0; i
< n
; i
++)
30 int loop1 (int n
, struct tail1
*x
)
34 for (i
= 0; i
< n
; i
++)
40 /* It is unlikely that this should be a tail array. We may deduce that most
41 likely, the loop iterates about 5 times, and the array is not worth prefetching. */
48 int loop5 (int n
, struct tail5
*x
)
52 for (i
= 0; i
< n
; i
++)
58 /* { dg-final { scan-tree-dump-times "Issued prefetch" 2 "aprefetch" } } */
59 /* { dg-final { scan-tree-dump-times "Not prefetching" 1 "aprefetch" } } */
60 /* { dg-final { cleanup-tree-dump "aprefetch" } } */