- // MIR for `main` before ConstProp
+ // MIR for `main` after ConstProp
  
  fn main() -> () {
      let mut _0: ();                      // return place in scope 0 at $DIR/mutable_variable_aggregate.rs:+0:11: +0:11
      let mut _1: (i32, i32);              // in scope 0 at $DIR/mutable_variable_aggregate.rs:+1:9: +1:14
      scope 1 {
          debug x => _1;                   // in scope 1 at $DIR/mutable_variable_aggregate.rs:+1:9: +1:14
          let _2: (i32, i32);              // in scope 1 at $DIR/mutable_variable_aggregate.rs:+3:9: +3:10
          scope 2 {
              debug y => _2;               // in scope 2 at $DIR/mutable_variable_aggregate.rs:+3:9: +3:10
          }
      }
  
      bb0: {
          StorageLive(_1);                 // scope 0 at $DIR/mutable_variable_aggregate.rs:+1:9: +1:14
          Deinit(_1);                      // scope 0 at $DIR/mutable_variable_aggregate.rs:+1:17: +1:25
          (_1.0: i32) = const 42_i32;      // scope 0 at $DIR/mutable_variable_aggregate.rs:+1:17: +1:25
          (_1.1: i32) = const 43_i32;      // scope 0 at $DIR/mutable_variable_aggregate.rs:+1:17: +1:25
          (_1.1: i32) = const 99_i32;      // scope 1 at $DIR/mutable_variable_aggregate.rs:+2:5: +2:13
          StorageLive(_2);                 // scope 1 at $DIR/mutable_variable_aggregate.rs:+3:9: +3:10
-         _2 = _1;                         // scope 1 at $DIR/mutable_variable_aggregate.rs:+3:13: +3:14
+         _2 = const (42_i32, 99_i32);     // scope 1 at $DIR/mutable_variable_aggregate.rs:+3:13: +3:14
          StorageDead(_2);                 // scope 1 at $DIR/mutable_variable_aggregate.rs:+4:1: +4:2
          StorageDead(_1);                 // scope 0 at $DIR/mutable_variable_aggregate.rs:+4:1: +4:2
          return;                          // scope 0 at $DIR/mutable_variable_aggregate.rs:+4:2: +4:2
      }
  }