gcc/testsuite/gcc.dg/tree-ssa/prefetch-8.c

   1 /* { dg-do compile { target { i?86-*-* x86_64-*-* } } } */
   2 /* { dg-options "-O2 -fprefetch-loop-arrays -march=amdfam10 --param simultaneous-prefetches=100 -fdump-tree-aprefetch-details -fdump-tree-optimized" } */
   3
   4 #define K 1000000
   5 int a[K];
   6
   7 void test()
   8 {
   9   unsigned i;
  10
  11   /* Nontemporal store should be used for a.  */
  12   for (i = 0; i < K; i++)
  13     a[i] = 0;
  14 }
  15
  16 /* { dg-final { scan-tree-dump-times "a nontemporal store" 1 "aprefetch" } } */
  17
  18 /* { dg-final { scan-tree-dump "=\\{nt\\}" "optimized" } } */
  19 /* { dg-final { scan-tree-dump-times "__builtin_ia32_mfence" 1 "optimized" } } */