gcc/testsuite/gcc.dg/tree-ssa/prefetch-4.c

   1 /* The loop rolls too little, hence the prefetching would not be useful.  */
   2
   3 /* { dg-do compile { target { { i?86-*-* x86_64-*-* } && ia32 } } } */
   4 /* { dg-options "-O2 -fprefetch-loop-arrays -march=athlon -fdump-tree-optimized" } */
   5
   6 int xxx[20];
   7
   8 void foo (int n)
   9 {
  10   int i;
  11
  12   for (i = 0; i < n; i++)
  13     xxx[i] = i;
  14 }
  15
  16 /* { dg-final { scan-tree-dump-times "prefetch" 0 "optimized" } } */
  17 /* { dg-final { cleanup-tree-dump "optimized" } } */