- // MIR for `foo` before SimplifyLocals-final
+ // MIR for `foo` after SimplifyLocals-final
  
  fn foo() -> () {
      let mut _0: ();
      let mut _1: (std::option::Option<u8>, std::option::Option<T>);
      let mut _2: std::option::Option<u8>;
      let mut _3: std::option::Option<T>;
      let mut _4: isize;
      let mut _5: isize;
      scope 1 {
          debug a => _6;
          let _6: u8;
      }
  
      bb0: {
          StorageLive(_1);
          StorageLive(_2);
          _2 = Option::<u8>::None;
          StorageLive(_3);
          _3 = Option::<T>::None;
          _1 = (move _2, move _3);
          StorageDead(_3);
          StorageDead(_2);
          _5 = discriminant((_1.0: std::option::Option<u8>));
          switchInt(move _5) -> [1: bb1, 0: bb3, otherwise: bb5];
      }
  
      bb1: {
          _4 = discriminant((_1.1: std::option::Option<T>));
          switchInt(move _4) -> [0: bb2, 1: bb3, otherwise: bb5];
      }
  
      bb2: {
          StorageLive(_6);
          _6 = (((_1.0: std::option::Option<u8>) as Some).0: u8);
          StorageDead(_6);
          goto -> bb3;
      }
  
      bb3: {
          drop(_1) -> [return: bb4, unwind unreachable];
      }
  
      bb4: {
          StorageDead(_1);
          return;
      }
  
      bb5: {
          unreachable;
      }
  }