gcc-4.9/gcc/testsuite/gcc.dg/compat/union-by-value-1_main.c


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/* Test function argument passing.  This was written when correcting
   a deviation from the ABI on SPARC64 between 3.3 and 3.4.  */

extern void union_by_value_1_x (void);
extern void exit (int);
int fails;

int
main ()
{
  union_by_value_1_x ();
  exit (0);
}