1  /* Check that shifts do not get unnecessary extends.
       2     See PR66706 for a case where this failed.  */
       3  
       4  /* { dg-do compile } */
       5  /* { dg-options "-O2" } */
       6  
       7  /* Each function should compile to exactly two instructions.  */
       8  /* { dg-final { scan-assembler-times {(?n)^\s+[a-z]} 16 } } */
       9  /* { dg-final { scan-assembler-times {(?n)^\s+blr} 8 } } */
      10  
      11  
      12  typedef unsigned u;
      13  typedef signed s;
      14  
      15  u rot(u x, u n) { return (x << n) | (x >> (32 - n)); }
      16  u shl(u x, u n) { return x << n; }
      17  u shr(u x, u n) { return x >> n; }
      18  s asr(s x, u n) { return x >> n; }
      19  
      20  u roti(u x) { return (x << 23) | (x >> 9); }
      21  u shli(u x) { return x << 23; }
      22  u shri(u x) { return x >> 23; }
      23  s asri(s x) { return x >> 23; }