gcc/testsuite/gcc.dg/vect/vect-strided-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 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 - ptr->a;
  25       res[i].b = ptr->b + ptr->a;
  26       ptr++;
  27     }
  28
  29   /* check results:  */
  30   for (i = 0; i < N; i++)
  31     {
  32       if (res[i].a != arr[i].b - arr[i].a
  33           || res[i].b != arr[i].a + arr[i].b)
  34         abort ();
  35     }
  36
  37   return 0;
  38 }
  39
  40 int main (void)
  41 {
  42   int i;
  43   s arr[N];
  44
  45   check_vect ();
  46
  47   for (i = 0; i < N; i++)
  48     {
  49       arr[i].a = i;
  50       arr[i].b = i * 2;
  51       if (y) /* Avoid vectorization.  */
  52         abort ();
  53     }
  54
  55   main1 (arr);
  56
  57   return 0;
  58 }
  59
  60 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect"  { target vect_strided2 } } } */
  61