gcc/testsuite/gcc.target/sh/prefetch.c

   1 /* Testcase to check generation of the operand cache prefetch instruction
   2    PREF @Rm.  */
   3 /* { dg-do compile { target { has_pref } } }  */
   4 /* { dg-options "-O0" }  */
   5 /* { dg-final { scan-assembler "pref" } }  */
   6
   7 void
   8 opt (void)
   9 {
  10   int *p, wk;
  11   int data[100];
  12
  13   /* data prefetch , instructions hit the cache. */
  14
  15   __builtin_prefetch (&data[0], 0, 0);
  16   __builtin_prefetch (&data[0], 0, 1);
  17   __builtin_prefetch (&data[0], 0, 2);
  18   __builtin_prefetch (&data[0], 0, 3);
  19   __builtin_prefetch (&data[0], 1, 0);
  20   __builtin_prefetch (&data[0], 1, 1);
  21   __builtin_prefetch (&data[0], 1, 2);
  22   __builtin_prefetch (&data[0], 1, 3);
  23
  24
  25   for (p = &data[0]; p < &data[9]; p++)
  26     {
  27       if (*p > *(p + 1))
  28         {
  29           wk = *p;
  30           *p = *(p + 1);
  31           *(p + 1) = wk;
  32         }
  33     }
  34 }