- // MIR for `foo` before ConstProp
+ // MIR for `foo` after ConstProp
  
  fn foo() -> () {
      let mut _0: ();
      let mut _1: (i32,);
      let mut _2: &mut i32;
      let mut _4: i32;
      scope 1 {
          debug u => _1;
          let _3: bool;
          scope 2 {
              debug y => _3;
          }
      }
  
      bb0: {
          StorageLive(_1);
          _1 = (const 1_i32,);
          StorageLive(_2);
          _2 = &mut (_1.0: i32);
          (*_2) = const 5_i32;
          StorageDead(_2);
          StorageLive(_3);
          StorageLive(_4);
          _4 = (_1.0: i32);
          _3 = Eq(move _4, const 5_i32);
          StorageDead(_4);
          _0 = const ();
          StorageDead(_3);
          StorageDead(_1);
          return;
      }
  }