- // MIR for `f` before CopyProp
+ // MIR for `f` after CopyProp
  
  fn f() -> bool {
      let mut _0: bool;
      let mut _1: u8;
      let mut _2: &u8;
      let mut _3: u8;
      let mut _4: &u8;
  
      bb0: {
          _1 = const 5_u8;
          _2 = &_1;
          _3 = _1;
          _4 = &_3;
          _0 = cmp_ref(_2, _4) -> [return: bb1, unwind unreachable];
      }
  
      bb1: {
          _0 = opaque::<u8>(_3) -> [return: bb2, unwind unreachable];
      }
  
      bb2: {
          return;
      }
  }