1 #ifdef __UINT32_TYPE__
2 typedef __UINT32_TYPE__ uint32_t;
3 #else
4 typedef unsigned uint32_t;
5 #endif
6 
7 #define __fake_const_swab32(x) ((uint32_t)(			      \
8         (((uint32_t)(x) & (uint32_t)0x000000ffUL) << 24) |            \
9         (((uint32_t)(x) & (uint32_t)0x0000ff00UL) <<  8) |            \
10         (((uint32_t)(x) & (uint32_t)0x000000ffUL) <<  8) |            \
11         (((uint32_t)(x) & (uint32_t)0x0000ff00UL)      ) |            \
12         (((uint32_t)(x) & (uint32_t)0xff000000UL) >> 24)))
13 
14 /* Previous version of bswap optimization would detect byte swap when none
15    happen. This test aims at catching such wrong detection to avoid
16    regressions.  */
17 
18 __attribute__ ((noinline, noclone)) uint32_t
fake_swap32(uint32_t in)19 fake_swap32 (uint32_t in)
20 {
21   return __fake_const_swab32 (in);
22 }
23 
main(void)24 int main(void)
25 {
26   if (sizeof (uint32_t) * __CHAR_BIT__ != 32)
27     return 0;
28   if (fake_swap32 (0x12345678UL) != 0x78567E12UL)
29     __builtin_abort ();
30   return 0;
31 }
32