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/* Test that __builtin_prefetch does no harm.
Use addresses that are unlikely to be word-aligned. Some targets
have alignment requirements for prefetch addresses, so make sure the
compiler takes care of that. This fails if it aborts, anything else
is OK. */
struct S {
short a;
short b;
char c[8];
} s;
char arr[100];
char *ptr = arr;
int idx = 3;
void
arg_ptr (char *p)
{
__builtin_prefetch (p, 0, 0);
}
void
arg_idx (char *p, int i)
{
__builtin_prefetch (&p[i], 0, 0);
}
void
glob_ptr (void)
{
__builtin_prefetch (ptr, 0, 0);
}
void
glob_idx (void)
{
__builtin_prefetch (&ptr[idx], 0, 0);
}
int
main ()
{
__builtin_prefetch (&s.b, 0, 0);
__builtin_prefetch (&s.c[1], 0, 0);
arg_ptr (&s.c[1]);
arg_ptr (ptr+3);
arg_idx (ptr, 3);
arg_idx (ptr+1, 2);
idx = 3;
glob_ptr ();
glob_idx ();
ptr++;
idx = 2;
glob_ptr ();
glob_idx ();
exit (0);
}
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