gcc/testsuite/gcc.dg/vect/costmodel/x86_64/costmodel-pr84986.c

   1 /* { dg-do compile } */
   2 /* { dg-require-effective-target vect_long } */
   3
   4 int N;
   5 long fn1(void) {
   6   short i;
   7   long a;
   8   i = a = 0;
   9   while (i < N)
  10     a -= i++;
  11   return a;
  12 }
  13
  14 /* { dg-final { scan-tree-dump "vectorized 1 loops" "vect" } } */