enhance `ConstGoto` mir-opt by moving up `StorageDead` statements From the `FIXME` in the implementation of `ConstGoto` miropt. We can move `StorageDead` statements up to the predecessor. This can expand the scope of application of this opt.
enhance `ConstGoto` mir-opt by moving up `StorageDead` statements From the `FIXME` in the implementation of `ConstGoto` miropt. We can move `StorageDead` statements up to the predecessor. This can expand the scope of application of this opt.