gcc/testsuite/gcc.dg/torture/pr44806.c

   1 /* { dg-do run } */
   2
   3 #include <stdint.h>
   4
   5 extern void abort (void);
   6
   7 #define N_DEV_BITS_4 5
   8 #define N_INO_BITS_4 (32 - N_DEV_BITS_4 - 2 - 1)
   9
  10 #define N_DEV_BITS_8 8
  11 #define N_INO_BITS_8 (64 - N_DEV_BITS_8 - 2 - 1)
  12
  13 struct dev_ino_4
  14 {
  15   uint32_t mode:2;
  16   uint32_t short_ino:N_INO_BITS_4;
  17   uint32_t mapped_dev:N_DEV_BITS_4;
  18   uint32_t always_set:1;
  19 };
  20
  21 struct dev_ino_8
  22 {
  23   uint32_t mode:2;
  24   uint64_t short_ino:N_INO_BITS_8;
  25   uint32_t mapped_dev:N_DEV_BITS_8;
  26   uint32_t always_set:1;
  27 };
  28
  29 struct dev_ino_full
  30 {
  31   uint32_t mode:2;
  32   uint32_t dev;
  33   uint32_t ino;
  34 };
  35
  36 enum di_mode
  37 {
  38   DI_MODE_4 = 1,
  39   DI_MODE_8 = 2,
  40   DI_MODE_FULL = 3
  41 };
  42
  43 struct di_ent
  44 {
  45   union
  46   {
  47     struct dev_ino_4 di4;
  48     struct dev_ino_8 di8;
  49     struct dev_ino_full full;
  50     uint32_t u32;
  51     uint64_t u64;
  52     void *ptr;
  53   } u;
  54 };
  55
  56 static struct di_ent
  57 decode_ptr (struct di_ent const *v)
  58 {
  59   struct di_ent di;
  60   di.u.ptr = (void *) v;
  61   return di;
  62 }
  63
  64 static int
  65 di_ent_equal (void const *x, void const *y)
  66 {
  67   struct di_ent a = decode_ptr (x);
  68   struct di_ent b = decode_ptr (y);
  69   if (a.u.di4.mode != b.u.di4.mode)
  70     return 0;
  71
  72   if (a.u.di4.mode == DI_MODE_4)
  73     return (a.u.di4.short_ino == b.u.di4.short_ino
  74             && a.u.di4.mapped_dev == b.u.di4.mapped_dev);
  75
  76   if (a.u.di8.mode == DI_MODE_8)
  77     return (a.u.di8.short_ino == b.u.di8.short_ino
  78             && a.u.di8.mapped_dev == b.u.di8.mapped_dev);
  79
  80   return (a.u.full.ino == b.u.full.ino
  81           && a.u.full.dev == b.u.full.dev);
  82 }
  83
  84 int
  85 main ()
  86 {
  87   if (di_ent_equal ((void *) 0x80143c4d, (void *) 0x80173851) != 0)
  88     abort ();
  89   return 0;
  90 }