gcc/testsuite/gcc.dg/vect/pr104112-2.c

   1 /* { dg-do compile } */
   2 /* Diagnose vector ops that are later decomposed.  */
   3 /* { dg-additional-options "-Wvector-operation-performance" } */
   4
   5 unsigned short foo (unsigned short *a, int n)
   6 {
   7   unsigned short sum = 0;
   8   for (int i = 0; i < n; ++i)
   9     sum += a[i];
  10   return sum;
  11 }