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