- // MIR for `main` before DataflowConstProp
+ // MIR for `main` after DataflowConstProp
  
  fn main() -> () {
      let mut _0: ();
      let mut _1: (i32, i32);
      let mut _3: i32;
      let mut _4: i32;
      let mut _5: i32;
      let mut _7: i32;
      let mut _8: i32;
      let mut _9: i32;
      let mut _10: i32;
      scope 1 {
          debug a => _1;
          let _2: i32;
          scope 2 {
              debug b => _2;
              let _6: i32;
              scope 3 {
                  debug c => _6;
              }
          }
      }
  
      bb0: {
          StorageLive(_1);
          _1 = (const 1_i32, const 2_i32);
          StorageLive(_2);
          StorageLive(_3);
          StorageLive(_4);
-         _4 = (_1.0: i32);
+         _4 = const 1_i32;
          StorageLive(_5);
-         _5 = (_1.1: i32);
-         _3 = Add(move _4, move _5);
+         _5 = const 2_i32;
+         _3 = const 3_i32;
          StorageDead(_5);
          StorageDead(_4);
-         _2 = Add(move _3, const 3_i32);
+         _2 = const 6_i32;
          StorageDead(_3);
          _1 = (const 2_i32, const 3_i32);
          StorageLive(_6);
          StorageLive(_7);
          StorageLive(_8);
-         _8 = (_1.0: i32);
+         _8 = const 2_i32;
          StorageLive(_9);
-         _9 = (_1.1: i32);
-         _7 = Add(move _8, move _9);
+         _9 = const 3_i32;
+         _7 = const 5_i32;
          StorageDead(_9);
          StorageDead(_8);
          StorageLive(_10);
-         _10 = _2;
-         _6 = Add(move _7, move _10);
+         _10 = const 6_i32;
+         _6 = const 11_i32;
          StorageDead(_10);
          StorageDead(_7);
          _0 = const ();
          StorageDead(_6);
          StorageDead(_2);
          StorageDead(_1);
          return;
      }
  }