gcc/testsuite/gcc.dg/sso-16.c

   1 /* { dg-do run } */
   2 /* { dg-require-effective-target int32plus } */
   3 /* { dg-options "-O3" } */
   4
   5 typedef __INT32_TYPE__ int32_t;
   6
   7 #define BIG_ENDIAN   __attribute__((scalar_storage_order("big-endian")))
   8
   9 /* host order version (little endian)*/
  10 struct _ip6_addr {
  11     union {
  12         char addr8[16];
  13         int32_t  addr32[4];
  14     } u;
  15 };
  16
  17 typedef struct _ip6_addr t_ip6_addr;
  18
  19 struct _net_addr {
  20     char is_v4;
  21     union {
  22         int32_t        addr;
  23         t_ip6_addr addr6;
  24     } u;
  25 };
  26
  27 typedef struct _net_addr t_net_addr;
  28
  29 /* big endian version */
  30 struct _be_ip6_addr {
  31     union {
  32         char addr8[16];
  33     } BIG_ENDIAN u;
  34 } BIG_ENDIAN;
  35
  36 typedef struct _be_ip6_addr t_be_ip6_addr;
  37
  38 struct _be_net_addr {
  39     char is_v4;
  40     union {
  41         t_be_ip6_addr addr6;
  42         int32_t           addr;
  43     } BIG_ENDIAN u;
  44 } BIG_ENDIAN;
  45
  46 typedef struct _be_net_addr t_be_net_addr;
  47
  48 /* convert */
  49 t_be_ip6_addr be_ip6_addr(const t_ip6_addr ip6)
  50 {
  51     t_be_ip6_addr rc = {
  52         .u.addr8[0] = ip6.u.addr8[0],
  53         .u.addr8[1] = ip6.u.addr8[1],
  54         .u.addr8[2] = ip6.u.addr8[2],
  55         .u.addr8[3] = ip6.u.addr8[3],
  56         .u.addr8[4] = ip6.u.addr8[4],
  57         .u.addr8[5] = ip6.u.addr8[5],
  58         .u.addr8[6] = ip6.u.addr8[6],
  59         .u.addr8[7] = ip6.u.addr8[7],
  60         .u.addr8[8] = ip6.u.addr8[8],
  61         .u.addr8[9] = ip6.u.addr8[9],
  62         .u.addr8[10] = ip6.u.addr8[10],
  63         .u.addr8[11] = ip6.u.addr8[11],
  64         .u.addr8[12] = ip6.u.addr8[12],
  65         .u.addr8[13] = ip6.u.addr8[13],
  66         .u.addr8[14] = ip6.u.addr8[14],
  67         .u.addr8[15] = ip6.u.addr8[15],
  68     };
  69     return rc;
  70 }
  71
  72 t_be_net_addr __attribute__((noipa)) be_net_addr(const t_net_addr ip)
  73 {
  74     t_be_net_addr rc = {.is_v4 = ip.is_v4 };
  75     if (ip.is_v4) {
  76         rc.u.addr = ip.u.addr;
  77     } else {
  78         rc.u.addr6 = be_ip6_addr(ip.u.addr6);
  79     }
  80     return rc;
  81 }
  82
  83 int main(void)
  84 {
  85     t_be_net_addr out = { };
  86
  87     t_net_addr in = {
  88         .is_v4 = 0,
  89         .u.addr6.u.addr8 =
  90             { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 }
  91     };
  92
  93     out = be_net_addr(in);
  94
  95     // actually first 4 bytes are swapped
  96     if (in.u.addr6.u.addr8[0] != out.u.addr6.u.addr8[0])
  97         __builtin_abort();
  98
  99     return 0;
 100 }