gcc/testsuite/gcc.dg/vect/vect-strided-u8-i2-gap.c

   1 /* { dg-require-effective-target vect_int } */
   2
   3 #include <stdarg.h>
   4 #include "tree-vect.h"
   5
   6 #define N 64
   7
   8 typedef struct {
   9    unsigned char a;
  10    unsigned char b;
  11 } s;
  12
  13 __attribute__ ((noinline)) int
  14 main1 (s *arr)
  15 {
  16   s *ptr = arr;
  17   s res[N];
  18   int i;
  19
  20   for (i = 0; i < N; i++)
  21     {
  22       res[i].a = ptr->b;
  23       res[i].b = ptr->b;
  24       ptr++;
  25     }
  26
  27   /* check results:  */
  28 #pragma GCC novector
  29   for (i = 0; i < N; i++)
  30     {
  31       if (res[i].a != arr[i].b
  32           || res[i].b != arr[i].b)
  33         abort ();
  34     }
  35
  36   ptr = arr;
  37   /* gap in store, use strided stores.  */
  38   for (i = 0; i < N; i++)
  39     {
  40       res[i].a = ptr->b;
  41       ptr++;
  42     }
  43
  44   /* check results:  */
  45 #pragma GCC novector
  46   for (i = 0; i < N; i++)
  47     {
  48       if (res[i].a != arr[i].b)
  49         abort ();
  50     }
  51
  52
  53   return 0;
  54 }
  55
  56 int main (void)
  57 {
  58   int i;
  59   s arr[N];
  60
  61   check_vect ();
  62
  63   for (i = 0; i < N; i++)
  64     {
  65       arr[i].a = i;
  66       arr[i].b = i * 2;
  67       asm volatile ("" ::: "memory");
  68     }
  69
  70   main1 (arr);
  71
  72   return 0;
  73 }
  74
  75 /* { dg-final { scan-tree-dump-times "vectorized 2 loops" 1 "vect"  { target vect_strided2 } } } */
  76