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

   1 /* { dg-do compile { target i?86-*-* x86_64-*-* } } */
   2 /* { dg-require-effective-target ilp32 } */
   3 /* { dg-options "-O1 -fprefetch-loop-arrays -march=athlon -fdump-tree-aprefetch-blocks" } */
   4
   5 int a[10000];
   6
   7 int foo(unsigned n)
   8 {
   9   unsigned i, s = 0;
  10
  11   for (i = 0; i < n; i++)
  12     s += a[i];
  13
  14   return s;
  15 }
  16
  17 /* We used to make the probability that the body of the loop (unrolled
  18    to enable prefetching) is entered 0, which is not correct.  */
  19
  20 /* { dg-final { scan-tree-dump-not "Invalid sum" "aprefetch"} } */
  21 /* { dg-final { scan-tree-dump-not "SUCC: 7 .100.0%" "aprefetch"} } */
  22 /* { dg-final { cleanup-tree-dump "aprefetch" } } */