1  /* Check that the GBR address optimization does not combine a gbr store
       2     and its use when a function call is in between, when GBR is a call used
       3     register, i.e. it is invalidated by function calls.  */
       4  /* { dg-do compile }  */
       5  /* { dg-options "-O1 -fcall-used-gbr" } */
       6  /* { dg-final { scan-assembler "stc\tgbr" } } */
       7  
       8  extern int test00 (void);
       9  int
      10  test01 (int x)
      11  {
      12    /* We must see a stc gbr,rn before the function call, because
      13       a function call could modify the gbr.  In this case the user requests
      14       the old gbr value, before the function call.  */
      15    int* p = (int*)__builtin_thread_pointer ();
      16    p[5] = test00 ();
      17    return 0;
      18  }