- // MIR for `f` before DataflowConstProp
+ // MIR for `f` after DataflowConstProp
  
  fn f() -> usize {
      let mut _0: usize;
      let mut _1: usize;
      let mut _2: bool;
  
      bb0: {
          StorageLive(_1);
          StorageLive(_2);
          _2 = const true;
-         switchInt(move _2) -> [0: bb2, otherwise: bb1];
+         switchInt(const true) -> [0: bb2, otherwise: bb1];
      }
  
      bb1: {
          _1 = const 1_usize;
          goto -> bb3;
      }
  
      bb2: {
          _1 = const 2_usize;
          goto -> bb3;
      }
  
      bb3: {
          StorageDead(_2);
-         _0 = Add(const 1_usize, move _1);
+         _0 = const 2_usize;
          StorageDead(_1);
          return;
      }
  }