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

   1 /* { dg-require-effective-target vect_int } */
   2
   3 #include <stdarg.h>
   4 #include "tree-vect.h"
   5
   6 #define N 16
   7
   8 __attribute__ ((noinline)) int main1 ()
   9 {
  10   int arr1[N];
  11   int k = 0;
  12   int m = 3, i = 0;
  13
  14   /* Vectorization of induction that is used after the loop.
  15      Currently vectorizable because scev_ccp disconnects the
  16      use-after-the-loop from the iv def inside the loop.  */
  17
  18    do {
  19         k = k + 2;
  20         arr1[i] = k;
  21         m = m + k;
  22         i++;
  23    } while (i < N);
  24
  25   /* check results:  */
  26   for (i = 0; i < N; i++)
  27     {
  28       if (arr1[i] != 2+2*i)
  29         abort ();
  30     }
  31
  32   return m + k;
  33 }
  34
  35 int main (void)
  36 {
  37   int res;
  38
  39   check_vect ();
  40
  41   res = main1 ();
  42   if (res != 32 + 275)
  43     abort ();
  44
  45   return 0;
  46 }
  47
  48 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */
  49 /* { dg-final { cleanup-tree-dump "vect" } } */