gcc/testsuite/gcc.misc-tests/i386-pf-athlon-1.c

   1 /* Test that the correct data prefetch instructions are generated for i386
   2    variants that use 3DNow! prefetchw or SSE prefetch instructions with
   3    locality hints.  */
   4
   5 /* { dg-do compile { target i?86-*-* } } */
   6
   7 char *msg = "howdy there";
   8
   9 void foo (char *p)
  10 {
  11   __builtin_prefetch (p, 0, 0);
  12   __builtin_prefetch (p, 0, 1);
  13   __builtin_prefetch (p, 0, 2);
  14   __builtin_prefetch (p, 0, 3);
  15   __builtin_prefetch (p, 1, 0);
  16   __builtin_prefetch (p, 1, 1);
  17   __builtin_prefetch (p, 1, 2);
  18   __builtin_prefetch (p, 1, 3);
  19 }
  20
  21 int main ()
  22 {
  23   foo (msg);
  24   exit (0);
  25 }
  26
  27 /* { dg-final { scan-assembler "prefetchw" } } */
  28 /* { dg-final { scan-assembler "prefetchnta" } } */
  29 /* { dg-final { scan-assembler "prefetcht" } } */