gcc/testsuite/gcc.dg/vect/vect-strided-u8-i2.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 - ptr->a;
  23       res[i].b = ptr->b + ptr->a;
  24       ptr++;
  25     }
  26   /* check results:  */
  27   for (i = 0; i < N; i++)
  28     {
  29       if (res[i].a != arr[i].b - arr[i].a
  30           || res[i].b != arr[i].a + arr[i].b)
  31         abort ();
  32     }
  33
  34   return 0;
  35 }
  36
  37 int main (void)
  38 {
  39   int i;
  40   s arr[N];
  41
  42   check_vect ();
  43
  44   for (i = 0; i < N; i++)
  45     {
  46       arr[i].a = i;
  47       arr[i].b = i * 2;
  48       asm volatile ("" ::: "memory");
  49     }
  50
  51   main1 (arr);
  52
  53   return 0;
  54 }
  55
  56 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect"  { target vect_strided2 } } } */
  57