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- // MIR for `main` before DataflowConstProp
+ // MIR for `main` after DataflowConstProp
  
  fn main() -> () {
      let mut _0: ();
      let _1: i32;
      let mut _3: u8;
      let mut _4: i32;
      scope 1 {
          debug a => _1;
          let _2: u8;
          scope 2 {
              debug b => _2;
          }
      }
  
      bb0: {
          StorageLive(_1);
          _1 = const 257_i32;
          StorageLive(_2);
          StorageLive(_3);
          StorageLive(_4);
-         _4 = _1;
-         _3 = move _4 as u8 (IntToInt);
+         _4 = const 257_i32;
+         _3 = const 1_u8;
          StorageDead(_4);
-         _2 = Add(move _3, const 1_u8);
+         _2 = const 2_u8;
          StorageDead(_3);
          _0 = const ();
          StorageDead(_2);
          StorageDead(_1);
          return;
      }
  }