Viewing file:  builtin-prefetch-1.c (1.32 KB) -rw-r--r--
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/* Test that __builtin_prefetch does no harm.
Prefetch using some invalid rw and locality values. These must be
compile-time constants. */
/* { dg-do run } */
extern void exit (int);
enum locality { none, low, moderate, high, bogus };
enum rw { read, write };
int arr[10];
void
good (int *p)
{
__builtin_prefetch (p, 0, 0);
__builtin_prefetch (p, 0, 1);
__builtin_prefetch (p, 0, 2);
__builtin_prefetch (p, 0, 3);
__builtin_prefetch (p, 1, 0);
__builtin_prefetch (p, 1, 1);
__builtin_prefetch (p, 1, 2);
__builtin_prefetch (p, 1, 3);
}
void
bad (int *p)
{
__builtin_prefetch (p, -1, 0); /* { dg-warning "invalid second argument to '__builtin_prefetch'; using zero" } */
__builtin_prefetch (p, 2, 0); /* { dg-warning "invalid second argument to '__builtin_prefetch'; using zero" } */
__builtin_prefetch (p, bogus, 0); /* { dg-warning "invalid second argument to '__builtin_prefetch'; using zero" } */
__builtin_prefetch (p, 0, -1); /* { dg-warning "invalid third argument to '__builtin_prefetch'; using zero" } */
__builtin_prefetch (p, 0, 4); /* { dg-warning "invalid third argument to '__builtin_prefetch'; using zero" } */
__builtin_prefetch (p, 0, bogus); /* { dg-warning "invalid third argument to '__builtin_prefetch'; using zero" } */
}
int
main ()
{
good (arr);
bad (arr);
exit (0);
}
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