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-*-* x86_64-*-* } && ia32 } } } */
   5
   6 extern void exit (int);
   7
   8 char *msg = "howdy there";
   9
  10 void foo (char *p)
  11 {
  12   __builtin_prefetch (p, 0, 0);
  13   __builtin_prefetch (p, 0, 1);
  14   __builtin_prefetch (p, 0, 2);
  15   __builtin_prefetch (p, 0, 3);
  16   __builtin_prefetch (p, 1, 0);
  17   __builtin_prefetch (p, 1, 1);
  18   __builtin_prefetch (p, 1, 2);
  19   __builtin_prefetch (p, 1, 3);
  20 }
  21
  22 int main ()
  23 {
  24   foo (msg);
  25   exit (0);
  26 }
  27
  28 /* { dg-final { scan-assembler "prefetchnta" } } */
  29 /* { dg-final { scan-assembler "prefetcht0" } } */
  30 /* { dg-final { scan-assembler "prefetcht1" } } */
  31 /* { dg-final { scan-assembler "prefetcht2" } } */
  32 /* { dg-final { scan-assembler-not "prefetchw" } } */