1  /* PR target/91102 */
       2  /* { dg-do compile } */
       3  /* { dg-options "-O2" } */
       4  
       5  int
       6  foo (long d, long l)
       7  {
       8    register long e asm ("x1") = d;
       9    register long f asm("x2") = l;
      10    asm ("" : : "r" (e), "r" (f));
      11    return 3;
      12  }
      13  
      14  struct T { int i; int j; };
      15  union S { long h; struct T t; };
      16  
      17  void
      18  bar (union S b)
      19  {
      20    while (1)
      21      {
      22        union S c = b;
      23        c.t.j++;
      24        b.h = foo (b.h, c.h);
      25      }
      26  }