1  /* PR tree-optimization/81396 */
       2  /* { dg-do compile } */
       3  /* { dg-options "-O2 -fdump-tree-optimized" } */
       4  
       5  typedef unsigned long long uint64_t;
       6  
       7  uint64_t
       8  foo (uint64_t word)
       9  {
      10  #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ && __SIZEOF_LONG_LONG__ == 8
      11    const unsigned char *const ptr = (const unsigned char *) &word;
      12    return ((uint64_t) ptr[0]
      13  	  | ((uint64_t) ptr[1] << 8)
      14  	  | ((uint64_t) ptr[2] << (8 * 2))
      15  	  | ((uint64_t) ptr[3] << (8 * 3))
      16  	  | ((uint64_t) ptr[4] << (8 * 4))
      17  	  | ((uint64_t) ptr[5] << (8 * 5))
      18  	  | ((uint64_t) ptr[6] << (8 * 6))
      19  	  | ((uint64_t) ptr[7] << (8 * 7)));
      20  #else
      21    return word;
      22  #endif
      23  }
      24  
      25  /* { dg-final { scan-tree-dump "return word_\[0-9]*\\(D\\);" "optimized" } } */