| /* { dg-do run } */ |
| /* { dg-require-effective-target int32plus } */ |
| /* { dg-options "-O3" } */ |
| |
| typedef __INT32_TYPE__ int32_t; |
| |
| #define BIG_ENDIAN __attribute__((scalar_storage_order("big-endian"))) |
| |
| /* host order version (little endian)*/ |
| struct _ip6_addr { |
| union { |
| char addr8[16]; |
| int32_t addr32[4]; |
| } u; |
| }; |
| |
| typedef struct _ip6_addr t_ip6_addr; |
| |
| struct _net_addr { |
| char is_v4; |
| union { |
| int32_t addr; |
| t_ip6_addr addr6; |
| } u; |
| }; |
| |
| typedef struct _net_addr t_net_addr; |
| |
| /* big endian version */ |
| struct _be_ip6_addr { |
| union { |
| char addr8[16]; |
| } BIG_ENDIAN u; |
| } BIG_ENDIAN; |
| |
| typedef struct _be_ip6_addr t_be_ip6_addr; |
| |
| struct _be_net_addr { |
| char is_v4; |
| union { |
| t_be_ip6_addr addr6; |
| int32_t addr; |
| } BIG_ENDIAN u; |
| } BIG_ENDIAN; |
| |
| typedef struct _be_net_addr t_be_net_addr; |
| |
| /* convert */ |
| t_be_ip6_addr be_ip6_addr(const t_ip6_addr ip6) |
| { |
| t_be_ip6_addr rc = { |
| .u.addr8[0] = ip6.u.addr8[0], |
| .u.addr8[1] = ip6.u.addr8[1], |
| .u.addr8[2] = ip6.u.addr8[2], |
| .u.addr8[3] = ip6.u.addr8[3], |
| .u.addr8[4] = ip6.u.addr8[4], |
| .u.addr8[5] = ip6.u.addr8[5], |
| .u.addr8[6] = ip6.u.addr8[6], |
| .u.addr8[7] = ip6.u.addr8[7], |
| .u.addr8[8] = ip6.u.addr8[8], |
| .u.addr8[9] = ip6.u.addr8[9], |
| .u.addr8[10] = ip6.u.addr8[10], |
| .u.addr8[11] = ip6.u.addr8[11], |
| .u.addr8[12] = ip6.u.addr8[12], |
| .u.addr8[13] = ip6.u.addr8[13], |
| .u.addr8[14] = ip6.u.addr8[14], |
| .u.addr8[15] = ip6.u.addr8[15], |
| }; |
| return rc; |
| } |
| |
| t_be_net_addr __attribute__((noipa)) be_net_addr(const t_net_addr ip) |
| { |
| t_be_net_addr rc = {.is_v4 = ip.is_v4 }; |
| if (ip.is_v4) { |
| rc.u.addr = ip.u.addr; |
| } else { |
| rc.u.addr6 = be_ip6_addr(ip.u.addr6); |
| } |
| return rc; |
| } |
| |
| int main(void) |
| { |
| t_be_net_addr out = { }; |
| |
| t_net_addr in = { |
| .is_v4 = 0, |
| .u.addr6.u.addr8 = |
| { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 } |
| }; |
| |
| out = be_net_addr(in); |
| |
| // actually first 4 bytes are swapped |
| if (in.u.addr6.u.addr8[0] != out.u.addr6.u.addr8[0]) |
| __builtin_abort(); |
| |
| return 0; |
| } |