gcc/testsuite/gcc.dg/vect/vect-strided-a-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 ()
  15 {
  16   s arr[N];
  17   s *ptr = arr;
  18   s res[N];
  19   int i;
  20
  21   for (i = 0; i < N; i++)
  22     {
  23       arr[i].a = i;
  24       arr[i].b = i * 2;
  25       if (arr[i].a == 178)
  26          abort();
  27     }
  28
  29   for (i = 0; i < N; i++)
  30     {
  31       res[i].a = ptr->a;
  32       res[i].b = ptr->a;
  33       ptr++;
  34     }
  35
  36   /* check results:  */
  37   for (i = 0; i < N; i++)
  38     {
  39       if (res[i].a != arr[i].a
  40           || res[i].b != arr[i].a)
  41         abort ();
  42     }
  43
  44   ptr = arr;
  45   /* Not vectorizable: gap in store.  */
  46   for (i = 0; i < N; i++)
  47     {
  48       res[i].a = ptr->b;
  49       ptr++;
  50     }
  51
  52   /* check results:  */
  53   for (i = 0; i < N; i++)
  54     {
  55       if (res[i].a != arr[i].b)
  56         abort ();
  57     }
  58
  59
  60   return 0;
  61 }
  62
  63 int main (void)
  64 {
  65   check_vect ();
  66
  67   main1 ();
  68
  69   return 0;
  70 }
  71
  72 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect"  { target { vect_interleave && vect_extract_even_odd } } } } */
  73 /* { dg-final { cleanup-tree-dump "vect" } } */
  74