- // MIR for `foo` before CopyProp
+ // MIR for `foo` after CopyProp
  
  fn foo(_1: u8) -> () {
      debug x => _1;
      let mut _0: ();
      let mut _2: u8;
      let mut _3: u8;
  
      bb0: {
          StorageLive(_2);
          StorageLive(_3);
          _3 = copy _1;
          _2 = dummy(move _3) -> [return: bb1, unwind unreachable];
      }
  
      bb1: {
          StorageDead(_3);
          _1 = move _2;
          StorageDead(_2);
          _0 = const ();
          return;
      }
  }