gcc/testsuite/gcc.dg/vect/vect-strided-u32-i4.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    int a;
  10    int b;
  11    int c;
  12    int d;
  13 } s;
  14
  15 volatile int y = 0;
  16
  17 __attribute__ ((noinline)) int
  18 main1 (s *arr)
  19 {
  20   int i;
  21   s *ptr = arr;
  22   s res[N];
  23
  24   for (i = 0; i < N; i++)
  25     {
  26       res[i].c = ptr->b - ptr->a + ptr->d - ptr->c;
  27       res[i].a = ptr->a + ptr->c + ptr->b + ptr->d;
  28       res[i].d = ptr->b - ptr->a + ptr->d - ptr->c;
  29       res[i].b = ptr->b - ptr->a + ptr->d - ptr->c;
  30       ptr++;
  31     }
  32
  33   /* check results:  */
  34   for (i = 0; i < N; i++)
  35     {
  36       if (res[i].c != arr[i].b - arr[i].a + arr[i].d - arr[i].c
  37           || res[i].a != arr[i].a + arr[i].c + arr[i].b + arr[i].d
  38           || res[i].d != arr[i].b - arr[i].a + arr[i].d - arr[i].c
  39           || res[i].b != arr[i].b - arr[i].a + arr[i].d - arr[i].c)
  40         abort ();
  41     }
  42
  43   return 0;
  44 }
  45
  46 int main (void)
  47 {
  48   int i;
  49   s arr[N];
  50
  51   check_vect ();
  52
  53   for (i = 0; i < N; i++)
  54     {
  55       arr[i].a = i;
  56       arr[i].b = i * 2;
  57       arr[i].c = 17;
  58       arr[i].d = i+34;
  59       if (y) /* Avoid vectorization.  */
  60         abort ();
  61     }
  62
  63   main1 (arr);
  64
  65   return 0;
  66 }
  67
  68 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect"  { target vect_strided4 } } } */
  69