1  /* This used to ICE on s390 due to bug in the definition of the 'R'
       2     constraint which replaced the 'm' constraint (together with 'T')
       3     while adding z10 support.  */
       4  
       5  /* { dg-do compile } */
       6  /* { dg-options "-O" } */
       7  
       8  int boo()
       9  {
      10    struct {
      11      unsigned char pad[4096];
      12      unsigned long bar;
      13    } *foo;
      14    asm volatile( "" : "=m" (*(unsigned long long*)(foo->bar))
      15  		: "a" (&foo->bar));
      16  }