Add a testcase for PR 44806.

2010-07-03  H.J. Lu  <hongjiu.lu@intel.com>

	PR c/44806
	* gcc.dg/torture/pr44806.c: New.

From-SVN: r161787

gcc/testsuite/ChangeLog

+2010-07-03  H.J. Lu  <hongjiu.lu@intel.com>
+
+	PR c/44806
+	* gcc.dg/torture/pr44806.c: New.
+
 2010-07-03  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* gnat.dg/cond_expr1.adb: New test.

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

+/* { dg-do run } */
+
+#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;
+}