1  /* { dg-do compile } */
       2  /* { dg-options "-O2" } */
       3  int a, b, c;
       4  void
       5  foo (void *x, void *y)
       6  {
       7    __asm__ ("": "=&c" (a), "=&D" (b), "=&S" (c): "r" (y), "2" (y));
       8  }