gcc/testsuite/gcc.dg/vect/vect-iv-1.c

   1 /* { dg-require-effective-target vect_int } */
   2
   3 #include <stdarg.h>
   4 #include "tree-vect.h"
   5
   6 #define N 16
   7 int result[N] = {8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38};
   8
   9 __attribute__ ((noinline)) int main1 (int X)
  10 {
  11   int arr[N];
  12   int k = X;
  13   int m, i=0;
  14
  15    /* vectorization of induction.  */
  16
  17    do {
  18         m = k + 5;
  19         arr[i] = m;
  20         k = k + 2;
  21         i++;
  22    } while (i < N);
  23
  24   /* check results:  */
  25 #pragma GCC novector
  26   for (i = 0; i < N; i++)
  27     {
  28       if (arr[i] != result[i])
  29         abort ();
  30     }
  31
  32   return 0;
  33 }
  34
  35 int main (void)
  36 {
  37   check_vect ();
  38
  39   return main1 (3);
  40 }
  41
  42 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */