gcc/testsuite/gcc.dg/vect/slp-reduc-12.c

   1 /* { dg-do compile } */
   2 /* { dg-require-effective-target vect_double } */
   3 /* { dg-require-effective-target vect_int } */
   4 /* { dg-require-effective-target vect_hw_misalign } */
   5 /* { dg-additional-options "-Ofast" } */
   6
   7 double foo (double *x, int * __restrict a, int n)
   8 {
   9   double r = 0.;
  10   for (int i = 0; i < n; ++i)
  11     {
  12       a[i] = a[i] + i;
  13       r += x[i];
  14     }
  15   return r;
  16 }
  17
  18 /* { dg-final { scan-tree-dump "using single def-use cycle for reduction" "vect" } } */