gcc/testsuite/gcc.dg/vect/vect-strided-a-u16-i2.c

   1 /* { dg-require-effective-target vect_int } */
   2
   3 #include <stdarg.h>
   4 #include "tree-vect.h"
   5
   6 #define N 128
   7
   8 typedef struct {
   9    unsigned short a;
  10    unsigned short 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       asm volatile ("" ::: "memory");
  26     }
  27
  28   for (i = 0; i < N; i++)
  29     {
  30       res[i].a = ptr->b - ptr->a;
  31       res[i].b = ptr->b + ptr->a;
  32       ptr++;
  33     }
  34
  35   /* check results:  */
  36   for (i = 0; i < N; i++)
  37     {
  38       if (res[i].a != arr[i].b - arr[i].a
  39           || res[i].b != arr[i].a + arr[i].b)
  40         abort ();
  41     }
  42
  43   return 0;
  44 }
  45
  46 int main (void)
  47 {
  48   int i;
  49
  50   check_vect ();
  51
  52   main1 ();
  53
  54   return 0;
  55 }
  56
  57 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect"  { target vect_strided2 } } } */
  58