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

   1 /* { dg-require-effective-target vect_int } */
   2
   3 #include <stdarg.h>
   4 #include "tree-vect.h"
   5
   6 #define N 128
   7
   8 /* unaligned store.  */
   9
  10 int ib[N+7];
  11
  12 __attribute__ ((noinline))
  13 int main1 ()
  14 {
  15   int i;
  16   int ia[N+1];
  17
  18   /* The store is aligned and the loads are misaligned with the same
  19      misalignment. Cost model is disabled. If misaligned stores are supported,
  20      we peel according to the loads to align them.  */
  21   for (i = 0; i <= N; i++)
  22     {
  23       ia[i] = ib[i+2] + ib[i+6];
  24     }
  25
  26   /* check results:  */
  27   for (i = 1; i <= N; i++)
  28     {
  29       if (ia[i] != ib[i+2] + ib[i+6])
  30         abort ();
  31     }
  32
  33   return 0;
  34 }
  35
  36 int main (void)
  37 {
  38   int i;
  39
  40   check_vect ();
  41
  42   for (i = 0; i <= N+6; i++)
  43     {
  44       asm volatile ("" : "+r" (i));
  45       ib[i] = i;
  46     }
  47
  48   return main1 ();
  49 }
  50
  51 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */
  52 /* { dg-final { scan-tree-dump-times "Vectorizing an unaligned access" 1 "vect" { target { { vect_element_align } && { vect_aligned_arrays } } } } } */
  53 /* { dg-final { scan-tree-dump-times "Alignment of access forced using peeling" 1 "vect" { target { { vect_element_align } && { vect_aligned_arrays } } } } } */