gcc/testsuite/gcc.dg/vect/vect-62.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))
   9 int main1 ()
  10 {
  11   int i, j;
  12   int ib[N] = {0,3,6,9,12,15,18,21,24,27,30,33,36,39,42,45};
  13   int ia[N][4][N+8];
  14
  15   /* Multidimensional array. Aligned. The "inner" dimensions
  16      are invariant in the inner loop. Store. */
  17   for (i = 0; i < N; i++)
  18     {
  19       for (j = 0; j < N; j++)
  20         {
  21            ia[i][1][j+8] = ib[i];
  22         }
  23     }
  24
  25   /* check results: */
  26   for (i = 0; i < N; i++)
  27     {
  28       for (j = 0; j < N; j++)
  29         {
  30            if (ia[i][1][j+8] != ib[i])
  31               abort();
  32         }
  33     }
  34
  35   /* Multidimensional array. Aligned. The "inner" dimensions
  36      are invariant in the inner loop. Vectorizable, but the
  37      vectorizer detects that everything is invariant and that
  38      the loop is better left untouched. (it should be optimized away). */
  39   for (i = 0; i < N; i++)
  40     {
  41       for (j = 0; j < N; j++)
  42         {
  43            ia[i][1][8] = ib[i];
  44         }
  45     }
  46
  47   /* check results: */
  48   for (i = 0; i < N; i++)
  49     {
  50       for (j = 0; j < N; j++)
  51         {
  52            if (ia[i][1][8] != ib[i])
  53               abort();
  54         }
  55     }
  56
  57
  58   return 0;
  59 }
  60
  61 int main (void)
  62 {
  63   check_vect ();
  64
  65   return main1 ();
  66 }
  67
  68 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */
  69 /* { dg-final { scan-tree-dump-times "Vectorizing an unaligned access" 0 "vect" } } */
  70 /* { dg-final { cleanup-tree-dump "vect" } } */