- // MIR for `fn0` before ConstProp
+ // MIR for `fn0` after ConstProp
  
  fn fn0() -> bool {
      let mut _0: bool;                    // return place in scope 0 at $DIR/address_of_pair.rs:+0:17: +0:21
      let mut _1: !;                       // in scope 0 at $DIR/address_of_pair.rs:+0:22: +9:2
      let mut _2: (i32, bool);             // in scope 0 at $DIR/address_of_pair.rs:+1:9: +1:17
      let _4: ();                          // in scope 0 at $DIR/address_of_pair.rs:+4:5: +6:6
      let mut _6: bool;                    // in scope 0 at $DIR/address_of_pair.rs:+7:16: +7:22
      scope 1 {
          debug pair => _2;                // in scope 1 at $DIR/address_of_pair.rs:+1:9: +1:17
          let _3: *mut bool;               // in scope 1 at $DIR/address_of_pair.rs:+2:9: +2:12
          scope 2 {
              debug ptr => _3;             // in scope 2 at $DIR/address_of_pair.rs:+2:9: +2:12
              let _5: bool;                // in scope 2 at $DIR/address_of_pair.rs:+7:9: +7:12
              scope 3 {
              }
              scope 4 {
                  debug ret => _5;         // in scope 4 at $DIR/address_of_pair.rs:+7:9: +7:12
              }
          }
      }
  
      bb0: {
          StorageLive(_2);                 // scope 0 at $DIR/address_of_pair.rs:+1:9: +1:17
          _2 = (const 1_i32, const false); // scope 0 at $DIR/address_of_pair.rs:+1:20: +1:30
          StorageLive(_3);                 // scope 1 at $DIR/address_of_pair.rs:+2:9: +2:12
          _3 = &raw mut (_2.1: bool);      // scope 1 at $SRC_DIR/core/src/ptr/mod.rs:LL:COL
          _2 = (const 1_i32, const false); // scope 2 at $DIR/address_of_pair.rs:+3:5: +3:22
          StorageLive(_4);                 // scope 2 at $DIR/address_of_pair.rs:+4:5: +6:6
          (*_3) = const true;              // scope 3 at $DIR/address_of_pair.rs:+5:9: +5:20
          _4 = const ();                   // scope 3 at $DIR/address_of_pair.rs:+4:5: +6:6
          StorageDead(_4);                 // scope 2 at $DIR/address_of_pair.rs:+6:5: +6:6
          StorageLive(_5);                 // scope 2 at $DIR/address_of_pair.rs:+7:9: +7:12
          StorageLive(_6);                 // scope 2 at $DIR/address_of_pair.rs:+7:16: +7:22
          _6 = (_2.1: bool);               // scope 2 at $DIR/address_of_pair.rs:+7:16: +7:22
          _5 = Not(move _6);               // scope 2 at $DIR/address_of_pair.rs:+7:15: +7:22
          StorageDead(_6);                 // scope 2 at $DIR/address_of_pair.rs:+7:21: +7:22
          _0 = _5;                         // scope 4 at $DIR/address_of_pair.rs:+8:12: +8:15
          StorageDead(_5);                 // scope 2 at $DIR/address_of_pair.rs:+9:1: +9:2
          StorageDead(_3);                 // scope 1 at $DIR/address_of_pair.rs:+9:1: +9:2
          StorageDead(_2);                 // scope 0 at $DIR/address_of_pair.rs:+9:1: +9:2
          return;                          // scope 0 at $DIR/address_of_pair.rs:+9:2: +9:2
      }
  }