use rustc::ty::TyCtxt;
use rustc::mir::{self, Mir, Location};
-use rustc_data_structures::bitslice::{BitwiseOperator, Word};
+use rustc_data_structures::bitvec::{BitwiseOperator, Word};
use rustc_data_structures::indexed_set::{IdxSet};
use rustc_data_structures::indexed_vec::Idx;