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-rw-r--r--compiler/rustc_borrowck/src/type_check/liveness/trace.rs11
1 files changed, 5 insertions, 6 deletions
diff --git a/compiler/rustc_borrowck/src/type_check/liveness/trace.rs b/compiler/rustc_borrowck/src/type_check/liveness/trace.rs
index 473c05963..9731b10aa 100644
--- a/compiler/rustc_borrowck/src/type_check/liveness/trace.rs
+++ b/compiler/rustc_borrowck/src/type_check/liveness/trace.rs
@@ -1,4 +1,4 @@
-use rustc_data_structures::fx::{FxHashMap, FxHashSet};
+use rustc_data_structures::fx::{FxIndexMap, FxIndexSet};
use rustc_index::bit_set::HybridBitSet;
use rustc_index::interval::IntervalSet;
use rustc_infer::infer::canonical::QueryRegionConstraints;
@@ -56,7 +56,7 @@ pub(super) fn trace<'mir, 'tcx>(
elements,
local_use_map,
move_data,
- drop_data: FxHashMap::default(),
+ drop_data: FxIndexMap::default(),
};
let mut results = LivenessResults::new(cx);
@@ -85,7 +85,7 @@ struct LivenessContext<'me, 'typeck, 'flow, 'tcx> {
move_data: &'me MoveData<'tcx>,
/// Cache for the results of `dropck_outlives` query.
- drop_data: FxHashMap<Ty<'tcx>, DropData<'tcx>>,
+ drop_data: FxIndexMap<Ty<'tcx>, DropData<'tcx>>,
/// Results of dataflow tracking which variables (and paths) have been
/// initialized.
@@ -185,7 +185,7 @@ impl<'me, 'typeck, 'flow, 'tcx> LivenessResults<'me, 'typeck, 'flow, 'tcx> {
fn add_extra_drop_facts(
&mut self,
drop_used: Vec<(Local, Location)>,
- relevant_live_locals: FxHashSet<Local>,
+ relevant_live_locals: FxIndexSet<Local>,
) {
let locations = IntervalSet::new(self.cx.elements.num_points());
@@ -435,8 +435,7 @@ impl<'me, 'typeck, 'flow, 'tcx> LivenessResults<'me, 'typeck, 'flow, 'tcx> {
//
// What we *actually* generate is a store to a temporary
// for the call (`TMP = call()...`) and then a
- // `DropAndReplace` to swap that with `X`
- // (`DropAndReplace` has very particular semantics).
+ // `Drop(X)` followed by `X = TMP` to swap that with `X`.
}
}