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[/] [openrisc/] [trunk/] [gnu-old/] [gcc-4.2.2/] [gcc/] [testsuite/] [gcc.c-torture/] [execute/] [builtin-prefetch-5.c] - Blame information for rev 816

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Line No. Rev Author Line
1 149 jeremybenn
/* Test that __builtin_prefetch does no harm.
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   Use addresses that are unlikely to be word-aligned.  Some targets
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   have alignment requirements for prefetch addresses, so make sure the
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   compiler takes care of that.  This fails if it aborts, anything else
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   is OK.  */
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struct S {
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  short a;
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  short b;
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  char c[8];
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} s;
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char arr[100];
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char *ptr = arr;
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int idx = 3;
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void
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arg_ptr (char *p)
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{
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  __builtin_prefetch (p, 0, 0);
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}
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void
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arg_idx (char *p, int i)
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{
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  __builtin_prefetch (&p[i], 0, 0);
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}
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void
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glob_ptr (void)
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{
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  __builtin_prefetch (ptr, 0, 0);
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}
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void
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glob_idx (void)
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{
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  __builtin_prefetch (&ptr[idx], 0, 0);
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}
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int
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main ()
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{
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  __builtin_prefetch (&s.b, 0, 0);
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  __builtin_prefetch (&s.c[1], 0, 0);
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  arg_ptr (&s.c[1]);
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  arg_ptr (ptr+3);
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  arg_idx (ptr, 3);
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  arg_idx (ptr+1, 2);
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  idx = 3;
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  glob_ptr ();
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  glob_idx ();
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  ptr++;
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  idx = 2;
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  glob_ptr ();
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  glob_idx ();
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  exit (0);
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}

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