- // MIR for `main` before DestinationPropagation
+ // MIR for `main` after DestinationPropagation
  
  fn main() -> () {
      let mut _0: ();
      let _1: main::Un;
      let mut _2: u32;
      let mut _3: u32;
      scope 1 {
          debug un => _1;
          scope 2 {
          }
          scope 3 (inlined std::mem::drop::<u32>) {
              debug _x => _3;
          }
      }
  
      bb0: {
          StorageLive(_1);
          StorageLive(_2);
          _2 = val() -> [return: bb1, unwind unreachable];
      }
  
      bb1: {
          _1 = Un { us: move _2 };
          StorageDead(_2);
          StorageLive(_3);
          _3 = (_1.0: u32);
          StorageDead(_3);
          StorageDead(_1);
          return;
      }
  }