gcc/testsuite/gcc.dg/vect/vect-29.c

   1 /* { dg-require-effective-target vect_int } */
   2
   3 #include <stdarg.h>
   4 #include "tree-vect.h"
   5
   6 #define N 128
   7 #define OFF 3
   8
   9 /* unaligned load.  */
  10
  11 int ia[N];
  12 int ib[N+OFF];
  13
  14 __attribute__ ((noinline))
  15 int main1 (int off)
  16 {
  17   int i;
  18
  19   for (i = 0; i < N+OFF; i++)
  20     {
  21       ib[i] = i;
  22     }
  23
  24   for (i = 0; i < N; i++)
  25     {
  26       ia[i] = ib[i+off];
  27     }
  28
  29   /* check results:  */
  30   for (i = 0; i < N; i++)
  31     {
  32       if (ia[i] != ib[i+off])
  33         abort ();
  34     }
  35
  36   return 0;
  37 }
  38
  39 int main (void)
  40 {
  41   check_vect ();
  42
  43   main1 (0); /* aligned */
  44   main1 (OFF); /* unaligned */
  45   return 0;
  46 }
  47
  48 /* For targets that don't support misaligned loads we version for the load.
  49    (The store is aligned).  */
  50
  51 /* The initialization induction loop (with aligned access) is also vectorized.  */
  52 /* { dg-final { scan-tree-dump-times "vectorized 2 loops" 1 "vect" } } */
  53 /* { dg-final { scan-tree-dump-times "Vectorizing an unaligned access" 1 "vect" { xfail vect_no_align } } } */
  54 /* { dg-final { scan-tree-dump-times "Alignment of access forced using peeling" 0 "vect" } } */
  55 /* { dg-final { scan-tree-dump-times "Alignment of access forced using versioning." 1 "vect" {target vect_no_align } } } */
  56 /* { dg-final { cleanup-tree-dump "vect" } } */