- // MIR for `main` before DataflowConstProp
+ // MIR for `main` after DataflowConstProp
  
  fn main() -> () {
      let mut _0: ();
      let _1: i32;
      let _2: ();
      let mut _3: i32;
      let mut _4: i32;
      scope 1 {
          debug a => _1;
      }
  
      bb0: {
          StorageLive(_1);
          _1 = const 1_i32;
          StorageLive(_2);
          StorageLive(_3);
          StorageLive(_4);
-         _4 = copy _1;
-         _3 = Add(move _4, const 1_i32);
+         _4 = const 1_i32;
+         _3 = const 2_i32;
          StorageDead(_4);
-         _2 = foo(move _3) -> [return: bb1, unwind continue];
+         _2 = foo(const 2_i32) -> [return: bb1, unwind continue];
      }
  
      bb1: {
          StorageDead(_3);
          StorageDead(_2);
          _0 = const ();
          StorageDead(_1);
          return;
      }
  }