gcc/testsuite/gcc.dg/tree-ssa/update-unroll-1.c

   1 /* { dg-do compile { target { i?86-*-* x86_64-*-* } } } */
   2 /* { dg-options "-O1 -fprefetch-loop-arrays -march=amdfam10 -fdump-tree-aprefetch-blocks" } */
   3
   4 int a[10000];
   5
   6 int foo(unsigned n)
   7 {
   8   unsigned i, s = 0;
   9
  10   for (i = 0; i < n; i++)
  11     s += a[i];
  12
  13   return s;
  14 }
  15
  16 /* We used to make the probability that the body of the loop (unrolled
  17    to enable prefetching) is entered 0, which is not correct.  */
  18
  19 /* { dg-final { scan-tree-dump-not "Invalid sum" "aprefetch"} } */
  20 /* { dg-final { scan-tree-dump-not "SUCC: 7 .100.0%" "aprefetch"} } */