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 #pragma GCC novector
  27   for (i = 0; i < N; i++)
  28     {
  29       if (arr1[i] != 2+2*i)
  30         abort ();
  31     }
  32
  33   return m + k;
  34 }
  35
  36 int main (void)
  37 {
  38   int res;
  39
  40   check_vect ();
  41
  42   res = main1 ();
  43   if (res != 32 + 275)
  44     abort ();
  45
  46   return 0;
  47 }
  48
  49 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */