gcc/testsuite/gcc.dg/vect/vect-align-1.c

   1 /* { dg-require-effective-target vect_int } */
   2
   3 #include <stdlib.h>
   4 #include <stdarg.h>
   5 #include "tree-vect.h"
   6
   7 /* Compile time known misalignment. Cannot use loop peeling to align
   8    the store.  */
   9
  10 #define N 16
  11
  12 struct foo {
  13   char x;
  14   int y[N];
  15 } __attribute__((packed));
  16
  17 __attribute__ ((noinline)) int
  18 main1 (struct foo * __restrict__ p)
  19 {
  20   int i;
  21   int x[N] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15};
  22
  23   for (i = 0; i < N; i++)
  24     {
  25       p->y[i] = x[i];
  26     }
  27
  28   /* check results:  */
  29   for (i = 0; i < N; i++)
  30     {
  31       if (p->y[i] != x[i])
  32         abort ();
  33     }
  34   return 0;
  35 }
  36
  37
  38 int main (void)
  39 {
  40   int i;
  41   struct foo *p = malloc (2*sizeof (struct foo));
  42   check_vect ();
  43
  44   main1 (p);
  45   return 0;
  46 }
  47
  48 /* { dg-final { scan-tree-dump-times "Alignment of access forced using versioning" 1 "vect" } } */
  49 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */
  50 /* { dg-final { cleanup-tree-dump "vect" } } */