main/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 volatile int y = 0;
  14
  15 __attribute__ ((noinline)) int
  16 main1 (s *arr)
  17 {
  18   s *ptr = arr;
  19   s res[N];
  20   int i;
  21
  22   for (i = 0; i < N; i++)
  23     {
  24       res[i].a = ptr->b - ptr->a;
  25       res[i].b = ptr->b + ptr->a;
  26       ptr++;
  27     }
  28   /* check results:  */
  29   for (i = 0; i < N; i++)
  30     {
  31       if (res[i].a != arr[i].b - arr[i].a
  32           || res[i].b != arr[i].a + arr[i].b)
  33         abort ();
  34     }
  35
  36   return 0;
  37 }
  38
  39 int main (void)
  40 {
  41   int i;
  42   s arr[N];
  43
  44   check_vect ();
  45
  46   for (i = 0; i < N; i++)
  47     {
  48       arr[i].a = i;
  49       arr[i].b = i * 2;
  50       if (y) /* Avoid vectorization.  */
  51         abort ();
  52     }
  53
  54   main1 (arr);
  55
  56   return 0;
  57 }
  58
  59 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect"  { target vect_strided2 } } } */
  60 /* { dg-final { cleanup-tree-dump "vect" } } */
  61