modernc.org/ccgo/v3@v3.16.14/lib/testdata/gcc-9.1.0/gcc/testsuite/gcc.c-torture/execute/zero-struct-1.c (about)

     1  struct g{};
     2  char y[3];
     3  char *f = &y[0];
     4  char *ff = &y[0];
     5  void h(void)
     6  {
     7    struct g t;
     8    *((struct g*)(f++)) = *((struct g*)(ff++));
     9    *((struct g*)(f++)) = (struct g){};
    10    t = *((struct g*)(ff++));
    11  }
    12  
    13  void abort (void);
    14  
    15  int main(void)
    16  {
    17    h();
    18    if (f != &y[2])
    19      abort();
    20    if (ff != &y[2])
    21      abort();
    22    return 0;
    23  }