1  /* PR rtl-optimization/63843 */
       2  
       3  static inline __attribute__ ((always_inline))
       4  unsigned short foo (unsigned short v)
       5  {
       6    return (v << 8) | (v >> 8);
       7  }
       8  
       9  unsigned short __attribute__ ((noinline, noclone, hot))
      10  bar (unsigned char *x)
      11  {
      12    unsigned int a;
      13    unsigned short b;
      14    __builtin_memcpy (&a, &x[0], sizeof (a));
      15    a ^= 0x80808080U;
      16    __builtin_memcpy (&x[0], &a, sizeof (a));
      17    __builtin_memcpy (&b, &x[2], sizeof (b));
      18    return foo (b);
      19  }
      20  
      21  int
      22  main ()
      23  {
      24    unsigned char x[8] = { 0x01, 0x01, 0x01, 0x01 };
      25    if (__CHAR_BIT__ == 8
      26        && sizeof (short) == 2
      27        && sizeof (int) == 4
      28        && bar (x) != 0x8181U)
      29      __builtin_abort ();
      30    return 0;
      31  }