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

   1 /* { dg-do compile { target { { i?86-*-* x86_64-*-* } && ia32 } } } */
   2 /* { dg-require-effective-target sse2 } */
   3 /* { dg-skip-if "" { i?86-*-* x86_64-*-* } { "-march=*" } { "-march=athlon" } } */
   4 /* { dg-options "-O2 -fprefetch-loop-arrays -march=athlon -msse2 -mfpmath=sse --param simultaneous-prefetches=100 -fdump-tree-aprefetch-details -fdump-tree-optimized" } */
   5
   6 #define K 1000000
   7 int a[K];
   8
   9 void test()
  10 {
  11   unsigned i;
  12
  13   /* Nontemporal store should be used for a.  */
  14   for (i = 0; i < K; i++)
  15     a[i] = 0;
  16 }
  17
  18 /* { dg-final { scan-tree-dump-times "a nontemporal store" 1 "aprefetch" } } */
  19
  20 /* { dg-final { scan-tree-dump "=\\{nt\\}" "optimized" } } */
  21 /* { dg-final { scan-tree-dump-times "__builtin_ia32_mfence" 1 "optimized" } } */
  22
  23 /* { dg-final { scan-assembler "movnti" } } */
  24 /* { dg-final { scan-assembler-times "mfence" 1 } } */
  25