- // MIR for `main` before DataflowConstProp
+ // MIR for `main` after DataflowConstProp
  
  fn main() -> () {
      let mut _0: ();                      // return place in scope 0 at $DIR/tuple.rs:+0:11: +0:11
      let mut _1: (i32, i32);              // in scope 0 at $DIR/tuple.rs:+1:9: +1:14
      let mut _3: i32;                     // in scope 0 at $DIR/tuple.rs:+2:13: +2:22
      let mut _4: i32;                     // in scope 0 at $DIR/tuple.rs:+2:13: +2:16
      let mut _5: i32;                     // in scope 0 at $DIR/tuple.rs:+2:19: +2:22
      let mut _7: i32;                     // in scope 0 at $DIR/tuple.rs:+4:13: +4:22
      let mut _8: i32;                     // in scope 0 at $DIR/tuple.rs:+4:13: +4:16
      let mut _9: i32;                     // in scope 0 at $DIR/tuple.rs:+4:19: +4:22
      let mut _10: i32;                    // in scope 0 at $DIR/tuple.rs:+4:25: +4:26
      scope 1 {
          debug a => _1;                   // in scope 1 at $DIR/tuple.rs:+1:9: +1:14
          let _2: i32;                     // in scope 1 at $DIR/tuple.rs:+2:9: +2:10
          scope 2 {
              debug b => _2;               // in scope 2 at $DIR/tuple.rs:+2:9: +2:10
              let _6: i32;                 // in scope 2 at $DIR/tuple.rs:+4:9: +4:10
              scope 3 {
                  debug c => _6;           // in scope 3 at $DIR/tuple.rs:+4:9: +4:10
              }
          }
      }
  
      bb0: {
          StorageLive(_1);                 // scope 0 at $DIR/tuple.rs:+1:9: +1:14
          _1 = (const 1_i32, const 2_i32); // scope 0 at $DIR/tuple.rs:+1:17: +1:23
          StorageLive(_2);                 // scope 1 at $DIR/tuple.rs:+2:9: +2:10
          StorageLive(_3);                 // scope 1 at $DIR/tuple.rs:+2:13: +2:22
          StorageLive(_4);                 // scope 1 at $DIR/tuple.rs:+2:13: +2:16
-         _4 = (_1.0: i32);                // scope 1 at $DIR/tuple.rs:+2:13: +2:16
+         _4 = const 1_i32;                // scope 1 at $DIR/tuple.rs:+2:13: +2:16
          StorageLive(_5);                 // scope 1 at $DIR/tuple.rs:+2:19: +2:22
-         _5 = (_1.1: i32);                // scope 1 at $DIR/tuple.rs:+2:19: +2:22
-         _3 = Add(move _4, move _5);      // scope 1 at $DIR/tuple.rs:+2:13: +2:22
+         _5 = const 2_i32;                // scope 1 at $DIR/tuple.rs:+2:19: +2:22
+         _3 = const 3_i32;                // scope 1 at $DIR/tuple.rs:+2:13: +2:22
          StorageDead(_5);                 // scope 1 at $DIR/tuple.rs:+2:21: +2:22
          StorageDead(_4);                 // scope 1 at $DIR/tuple.rs:+2:21: +2:22
-         _2 = Add(move _3, const 3_i32);  // scope 1 at $DIR/tuple.rs:+2:13: +2:26
+         _2 = const 6_i32;                // scope 1 at $DIR/tuple.rs:+2:13: +2:26
          StorageDead(_3);                 // scope 1 at $DIR/tuple.rs:+2:25: +2:26
          _1 = (const 2_i32, const 3_i32); // scope 2 at $DIR/tuple.rs:+3:5: +3:15
          StorageLive(_6);                 // scope 2 at $DIR/tuple.rs:+4:9: +4:10
          StorageLive(_7);                 // scope 2 at $DIR/tuple.rs:+4:13: +4:22
          StorageLive(_8);                 // scope 2 at $DIR/tuple.rs:+4:13: +4:16
-         _8 = (_1.0: i32);                // scope 2 at $DIR/tuple.rs:+4:13: +4:16
+         _8 = const 2_i32;                // scope 2 at $DIR/tuple.rs:+4:13: +4:16
          StorageLive(_9);                 // scope 2 at $DIR/tuple.rs:+4:19: +4:22
-         _9 = (_1.1: i32);                // scope 2 at $DIR/tuple.rs:+4:19: +4:22
-         _7 = Add(move _8, move _9);      // scope 2 at $DIR/tuple.rs:+4:13: +4:22
+         _9 = const 3_i32;                // scope 2 at $DIR/tuple.rs:+4:19: +4:22
+         _7 = const 5_i32;                // scope 2 at $DIR/tuple.rs:+4:13: +4:22
          StorageDead(_9);                 // scope 2 at $DIR/tuple.rs:+4:21: +4:22
          StorageDead(_8);                 // scope 2 at $DIR/tuple.rs:+4:21: +4:22
          StorageLive(_10);                // scope 2 at $DIR/tuple.rs:+4:25: +4:26
-         _10 = _2;                        // scope 2 at $DIR/tuple.rs:+4:25: +4:26
-         _6 = Add(move _7, move _10);     // scope 2 at $DIR/tuple.rs:+4:13: +4:26
+         _10 = const 6_i32;               // scope 2 at $DIR/tuple.rs:+4:25: +4:26
+         _6 = const 11_i32;               // scope 2 at $DIR/tuple.rs:+4:13: +4:26
          StorageDead(_10);                // scope 2 at $DIR/tuple.rs:+4:25: +4:26
          StorageDead(_7);                 // scope 2 at $DIR/tuple.rs:+4:25: +4:26
          _0 = const ();                   // scope 0 at $DIR/tuple.rs:+0:11: +5:2
          StorageDead(_6);                 // scope 2 at $DIR/tuple.rs:+5:1: +5:2
          StorageDead(_2);                 // scope 1 at $DIR/tuple.rs:+5:1: +5:2
          StorageDead(_1);                 // scope 0 at $DIR/tuple.rs:+5:1: +5:2
          return;                          // scope 0 at $DIR/tuple.rs:+5:2: +5:2
      }
  }