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[/] [openrisc/] [trunk/] [gnu-old/] [gcc-4.2.2/] [gcc/] [testsuite/] [gcc.c-torture/] [execute/] [builtin-prefetch-6.c] - Blame information for rev 856

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Line No. Rev Author Line
1 149 jeremybenn
/* Test that __builtin_prefetch does no harm.
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   Data prefetch should not fault if used with an invalid address.  */
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#include <limits.h>
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#define ARRSIZE 65
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int *bad_addr[ARRSIZE];
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int arr_used;
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/* Fill bad_addr with a range of values in the hopes that on any target
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   some will be invalid addresses.  */
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void
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init_addrs (void)
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{
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  int i;
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  int bits_per_ptr = sizeof (void *) * 8;
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  for (i = 0; i < bits_per_ptr; i++)
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    bad_addr[i] = (void *)(1UL << i);
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  arr_used = bits_per_ptr + 1;  /* The last element used is zero.  */
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}
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void
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prefetch_for_read (void)
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{
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  int i;
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  for (i = 0; i < ARRSIZE; i++)
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    __builtin_prefetch (bad_addr[i], 0, 0);
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}
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void
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prefetch_for_write (void)
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{
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  int i;
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  for (i = 0; i < ARRSIZE; i++)
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    __builtin_prefetch (bad_addr[i], 1, 0);
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}
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int
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main ()
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{
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  init_addrs ();
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  prefetch_for_read ();
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  prefetch_for_write ();
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  exit (0);
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}

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