gcc/testsuite/gcc.dg/vect/vect-strided-a-u16-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    unsigned short a;
  10    unsigned short b;
  11    unsigned short c;
  12    unsigned short d;
  13 } s;
  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       arr[i].c = 17;
  28       arr[i].d = i+34;
  29       asm volatile ("" ::: "memory");
  30     }
  31
  32   for (i = 0; i < N; i++)
  33     {
  34       unsigned short x, y, z, w;
  35       x = ptr->b - ptr->a;
  36       y = ptr->d - ptr->c;
  37       res[i].c = x + y;
  38       z =  ptr->a + ptr->c;
  39       w = ptr->b + ptr->d;
  40       res[i].a = z + w;
  41       res[i].d = x + y;
  42       res[i].b = x + y;
  43       ptr++;
  44     }
  45
  46   /* check results:  */
  47 #pragma GCC novector
  48   for (i = 0; i < N; i++)
  49     {
  50       if (res[i].c != arr[i].b - arr[i].a + arr[i].d - arr[i].c
  51           || res[i].a != arr[i].a + arr[i].c + arr[i].b + arr[i].d
  52           || res[i].d != arr[i].b - arr[i].a + arr[i].d - arr[i].c
  53           || res[i].b != arr[i].b - arr[i].a + arr[i].d - arr[i].c)
  54         abort ();
  55     }
  56
  57   return 0;
  58 }
  59
  60 int main (void)
  61 {
  62   int i;
  63
  64   check_vect ();
  65
  66   main1 ();
  67
  68   return 0;
  69 }
  70
  71 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect"  { target vect_strided4 } } } */
  72