clang-tests/gcc-4_2-testsuite/src/gcc.dg/compat/struct-by-value-3_main.c

/* Test structures passed by value, including to a function with a
   variable-length argument list.  All struct members are scalar
   integral types, and the structs are "small": 1, 2, 4, 8, and 12
   bytes for LP64.  */

extern void struct_by_value_3_x (void);
extern void exit (int);
int fails;

int
main ()
{
  struct_by_value_3_x ();
  exit (0);
}