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

   1 /* Test that the correct data prefetch instructions are generated for i386
   2    variants that use SSE prefetch instructions.  */
   3
   4 /* { dg-do compile { target i?86-*-* } } */
   5
   6 char *msg = "howdy there";
   7
   8 void foo (char *p)
   9 {
  10   __builtin_prefetch (p, 0, 0);
  11   __builtin_prefetch (p, 0, 1);
  12   __builtin_prefetch (p, 0, 2);
  13   __builtin_prefetch (p, 0, 3);
  14   __builtin_prefetch (p, 1, 0);
  15   __builtin_prefetch (p, 1, 1);
  16   __builtin_prefetch (p, 1, 2);
  17   __builtin_prefetch (p, 1, 3);
  18 }
  19
  20 int main ()
  21 {
  22   foo (msg);
  23   exit (0);
  24 }
  25
  26 /* { dg-final { scan-assembler "prefetchnta" } } */
  27 /* { dg-final { scan-assembler "prefetcht0" } } */
  28 /* { dg-final { scan-assembler "prefetcht1" } } */
  29 /* { dg-final { scan-assembler "prefetcht2" } } */
  30 /* { dg-final { scan-assembler-not "prefetchw" } } */