1  /* { dg-do run { target i?86-*-* x86_64-*-* } } */
       2  
       3  int tester(char *bytes)
       4  {
       5    union {
       6        struct {
       7  	  unsigned int r1:4;
       8  	  unsigned int r2:4;
       9        } fmt;
      10        char value[1];
      11    } ovl;
      12  
      13    ovl.value[0] = bytes[0];
      14    return ovl.fmt.r1;
      15  }
      16  extern void abort (void);
      17  int main()
      18  {
      19    char buff = 0x2f;
      20    if (tester(&buff) != 0x0f)
      21      abort ();
      22    return 0;
      23  }
      24