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/* { dg-do run } */

/* { dg-options "-std=c99" } */

#include <stdint.h>

extern void abort (void);

#define N_DEV_BITS_4 5

#define N_INO_BITS_4 (32 - N_DEV_BITS_4 - 2 - 1)

#define N_DEV_BITS_8 8

#define N_INO_BITS_8 (64 - N_DEV_BITS_8 - 2 - 1)

struct dev_ino_4

{

  uint32_t mode:2;

  uint32_t short_ino:N_INO_BITS_4;

  uint32_t mapped_dev:N_DEV_BITS_4;

  uint32_t always_set:1;

};

struct dev_ino_8

{

  uint32_t mode:2;

  uint64_t short_ino:N_INO_BITS_8;

  uint32_t mapped_dev:N_DEV_BITS_8;

  uint32_t always_set:1;

};

struct dev_ino_full

{

  uint32_t mode:2;

  uint32_t dev;

  uint32_t ino;

};

enum di_mode

{

  DI_MODE_4 = 1,

  DI_MODE_8 = 2,

  DI_MODE_FULL = 3

};

struct di_ent

{

  union

  {

    struct dev_ino_4 di4;

    struct dev_ino_8 di8;

    struct dev_ino_full full;

    uint32_t u32;

    uint64_t u64;

    void *ptr;

  } u;

};

static struct di_ent

decode_ptr (struct di_ent const *v)

{

  struct di_ent di;

  di.u.ptr = (void *) v;

  return di;

}

static int

di_ent_equal (void const *x, void const *y)

{

  struct di_ent a = decode_ptr (x);

  struct di_ent b = decode_ptr (y);

  if (a.u.di4.mode != b.u.di4.mode)

    return 0;

  if (a.u.di4.mode == DI_MODE_4)

    return (a.u.di4.short_ino == b.u.di4.short_ino

            && a.u.di4.mapped_dev == b.u.di4.mapped_dev);

  if (a.u.di8.mode == DI_MODE_8)

    return (a.u.di8.short_ino == b.u.di8.short_ino

            && a.u.di8.mapped_dev == b.u.di8.mapped_dev);

  return (a.u.full.ino == b.u.full.ino

          && a.u.full.dev == b.u.full.dev);

}

int

main ()

{

  if (di_ent_equal ((void *) 0x80143c4d, (void *) 0x80173851) != 0)

    abort ();

  return 0;

}