1  /* PR rtl-optimization/78580 */
       2  /* { dg-do compile } */
       3  /* { dg-options "-O0 -ffixed-ebx" } */
       4  
       5  extern const signed char a;
       6  
       7  int
       8  foo (signed char x)
       9  {
      10    return x;
      11  }
      12  
      13  int
      14  main ()
      15  {
      16    foo (a);
      17    return 0;
      18  }