main/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 volatile int y = 0;
  14
  15 __attribute__ ((noinline)) int
  16 main1 ()
  17 {
  18   s arr[N];
  19   s *ptr = arr;
  20   s res[N];
  21   int i;
  22
  23   for (i = 0; i < N; i++)
  24     {
  25       arr[i].a = i;
  26       arr[i].b = i * 2;
  27       if (y) /* Avoid vectorization.  */
  28         abort ();
  29     }
  30
  31   for (i = 0; i < N; i++)
  32     {
  33       res[i].a = ptr->a;
  34       res[i].b = ptr->a;
  35       ptr++;
  36     }
  37
  38   /* check results:  */
  39   for (i = 0; i < N; i++)
  40     {
  41       if (res[i].a != arr[i].a
  42           || res[i].b != arr[i].a)
  43         abort ();
  44     }
  45
  46   ptr = arr;
  47   /* Not vectorizable: gap in store.  */
  48   for (i = 0; i < N; i++)
  49     {
  50       res[i].a = ptr->b;
  51       ptr++;
  52     }
  53
  54   /* check results:  */
  55   for (i = 0; i < N; i++)
  56     {
  57       if (res[i].a != arr[i].b)
  58         abort ();
  59     }
  60
  61
  62   return 0;
  63 }
  64
  65 int main (void)
  66 {
  67   check_vect ();
  68
  69   main1 ();
  70
  71   return 0;
  72 }
  73
  74 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect"  { target vect_strided2 } } } */
  75 /* { dg-final { cleanup-tree-dump "vect" } } */
  76