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   for (i = 0; i < N; i++)
  29     {
  30       if (res[i].a != arr[i].b
  31           || res[i].b != arr[i].b)
  32         abort ();
  33     }
  34
  35   ptr = arr;
  36   /* Not vectorizable: gap in store.  */
  37   for (i = 0; i < N; i++)
  38     {
  39       res[i].a = ptr->b;
  40       ptr++;
  41     }
  42
  43   /* check results:  */
  44   for (i = 0; i < N; i++)
  45     {
  46       if (res[i].a != arr[i].b)
  47         abort ();
  48     }
  49
  50
  51   return 0;
  52 }
  53
  54 int main (void)
  55 {
  56   int i;
  57   s arr[N];
  58
  59   check_vect ();
  60
  61   for (i = 0; i < N; i++)
  62     {
  63       arr[i].a = i;
  64       arr[i].b = i * 2;
  65       if (arr[i].a == 178)
  66          abort();
  67     }
  68
  69   main1 (arr);
  70
  71   return 0;
  72 }
  73
  74 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect"  { target { vect_interleave && vect_extract_even_odd } } } } */
  75 /* { dg-final { cleanup-tree-dump "vect" } } */
  76