1/* { dg-do run } */ 2/* { dg-options "-O2" } */ 3 4#pragma GCC optimize("no-unit-at-a-time") 5 6typedef unsigned char u8; 7typedef unsigned long long u64; 8 9static inline __attribute__((always_inline)) u64 __swab64p(const u64 *p) 10{ 11 return (__builtin_constant_p((u64)(*p)) ? ((u64)( (((u64)(*p) & (u64)0x00000000000000ffULL) << 56) | (((u64)(*p) & (u64)0x000000000000ff00ULL) << 40) | (((u64)(*p) & (u64)0x0000000000ff0000ULL) << 24) | (((u64)(*p) & (u64)0x00000000ff000000ULL) << 8) | (((u64)(*p) & (u64)0x000000ff00000000ULL) >> 8) | (((u64)(*p) & (u64)0x0000ff0000000000ULL) >> 24) | (((u64)(*p) & (u64)0x00ff000000000000ULL) >> 40) | (((u64)(*p) & (u64)0xff00000000000000ULL) >> 56))) : __builtin_bswap64(*p)); 12} 13 14static inline u64 wwn_to_u64(void *wwn) 15{ 16 return __swab64p(wwn); 17} 18 19void __attribute__((noinline,noclone)) broken(u64* shost) 20{ 21 u8 node_name[8] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; 22 *shost = wwn_to_u64(node_name); 23} 24 25void __attribute__((noinline,noclone)) dummy(void) 26{ 27 __builtin_abort(); 28} 29 30int main(int argc, char* argv[]) 31{ 32 u64 v; 33 34 broken(&v); 35 36 if(v != (u64)-1) 37 __builtin_abort(); 38 39 return 0; 40} 41