text: /* Verify that NRV optimizations are prohibited when the LHS is an
     indirect reference to something that may be call-clobbered. */
  /* { dg-do compile } */
  /* { dg-options "-O -fdump-tree-optimized" } */
  /* LLVM LOCAL test not applicable */
  /* { dg-require-fdump "" } */
  
  typedef struct { int x[20]; void *y; } S;
  S nrv_candidate (void);
  void use_result (S);
  void make_escape (S *);
  S global_S;
  void foo (void)
  {
    S *result;
    S local_S;
  
    /* We can't perform return slot optimization because global_S is
       global and may be clobbered by nrv_candidate.  */
    result = &global_S;
    *result = nrv_candidate ();
    use_result (*result);
  
    /* We can't perform return slot optimization because local_S is
       call_clobbered (its address escapes prior to invoking
       nrv_candidate).  */
    make_escape (&local_S);
    result = &local_S;
    *result = nrv_candidate ();
    use_result (*result);
  }
  
  /* { dg-final { scan-tree-dump-times "return slot optimization" 0 "optimized" } } */
  /* { dg-final { cleanup-tree-dump "optimized" } } */
  
  