1#ifdef __INT32_TYPE__
2typedef __INT32_TYPE__ int32_t;
3#else
4typedef int int32_t;
5#endif
6
7#ifdef __UINT32_TYPE__
8typedef __UINT32_TYPE__ uint32_t;
9#else
10typedef unsigned uint32_t;
11#endif
12
13#define __fake_const_swab32(x) ((uint32_t)(		      \
14	(((uint32_t)(x) & (uint32_t)0x000000ffUL) << 24) |    \
15	(((uint32_t)(x) & (uint32_t)0x0000ff00UL) <<  8) |    \
16	(((uint32_t)(x) & (uint32_t)0x00ff0000UL) >>  8) |    \
17	(( (int32_t)(x) &  (int32_t)0xff000000UL) >> 24)))
18
19/* Previous version of bswap optimization failed to consider sign extension
20   and as a result would replace an expression *not* doing a bswap by a
21   bswap.  */
22
23__attribute__ ((noinline, noclone)) uint32_t
24fake_bswap32 (uint32_t in)
25{
26  return __fake_const_swab32 (in);
27}
28
29int
30main(void)
31{
32  if (sizeof (int32_t) * __CHAR_BIT__ != 32)
33    return 0;
34  if (sizeof (uint32_t) * __CHAR_BIT__ != 32)
35    return 0;
36  if (fake_bswap32 (0x87654321) != 0xffffff87)
37    __builtin_abort ();
38  return 0;
39}
40