1 /* Test that __builtin_prefetch does no harm.
3 Data prefetch should not fault if used with an invalid address. */
8 int *bad_addr[ARRSIZE];
11 /* Fill bad_addr with a range of values in the hopes that on any target
12 some will be invalid addresses. */
17 int bits_per_ptr = sizeof (void *) * 8;
18 for (i = 0; i < bits_per_ptr; i++)
19 bad_addr[i] = (void *)(1UL << i);
20 arr_used = bits_per_ptr + 1; /* The last element used is zero. */
24 prefetch_for_read (void)
27 for (i = 0; i < ARRSIZE; i++)
28 __builtin_prefetch (bad_addr[i], 0, 0);
32 prefetch_for_write (void)
35 for (i = 0; i < ARRSIZE; i++)
36 __builtin_prefetch (bad_addr[i], 1, 0);
44 prefetch_for_write ();