modernc.org/cc@v1.0.1/testdata/gcc-6.3.0/gcc/testsuite/gcc.c-torture/execute/pr38151.c (about)

     1  /* { dg-options "-Wno-psabi" } */
     2  void abort (void);
     3  
     4  struct S2848
     5  {
     6    unsigned int a;
     7    _Complex int b;
     8    struct
     9    {
    10    } __attribute__ ((aligned)) c;
    11  };
    12  
    13  struct S2848 s2848;
    14  
    15  int fails;
    16  
    17  void  __attribute__((noinline))
    18  check2848va (int z, ...)
    19  {
    20    struct S2848 arg;
    21    __builtin_va_list ap;
    22  
    23    __builtin_va_start (ap, z);
    24  
    25    arg = __builtin_va_arg (ap, struct S2848);
    26  
    27    if (s2848.a != arg.a)
    28      ++fails;
    29    if (s2848.b != arg.b)
    30      ++fails;
    31  
    32    __builtin_va_end (ap);
    33  }
    34  
    35  int main (void)
    36  {
    37    s2848.a = 4027477739U;
    38    s2848.b = (723419448 + -218144346 * __extension__ 1i);
    39  
    40    check2848va (1, s2848);
    41  
    42    if (fails)
    43      abort ();
    44  
    45    return 0;
    46  }
    47