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 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;
  25       res[i].b = ptr->b;
  26       ptr++;
  27     }
  28
  29   /* check results:  */
  30   for (i = 0; i < N; i++)
  31     {
  32       if (res[i].a != arr[i].b
  33           || res[i].b != arr[i].b)
  34         abort ();
  35     }
  36
  37   ptr = arr;
  38   /* gap in store, use strided stores.  */
  39   for (i = 0; i < N; i++)
  40     {
  41       res[i].a = ptr->b;
  42       ptr++;
  43     }
  44
  45   /* check results:  */
  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       if (y) /* Avoid vectorization.  */
  68         abort ();
  69     }
  70
  71   main1 (arr);
  72
  73   return 0;
  74 }
  75
  76 /* { dg-final { scan-tree-dump-times "vectorized 2 loops" 1 "vect"  { target vect_strided2 } } } */
  77