refer to points and not "elements", and remove unused return value

Author: lqd

compiler/rustc_borrowck/src/region_infer/values.rs

@@ -143,11 +143,10 @@ impl<N: Idx> LivenessValues<N> {
         self.points.insert(region, point);
     }
 
-    /// Adds all the elements in the given bit array into the given
-    /// region. Returns whether any of them are newly added.
-    pub(crate) fn add_elements(&mut self, region: N, locations: &IntervalSet<PointIndex>) -> bool {
-        debug!("LivenessValues::add_elements(region={:?}, locations={:?})", region, locations);
-        self.points.union_row(region, locations)
+    /// Records `region` as being live at all the given `points`.
+    pub(crate) fn add_points(&mut self, region: N, points: &IntervalSet<PointIndex>) {
+        debug!("LivenessValues::add_points(region={:?}, points={:?})", region, points);
+        self.points.union_row(region, points);
     }
 
     /// Records `region` as being live at all the control-flow points.

compiler/rustc_borrowck/src/type_check/liveness/trace.rs

@@ -618,7 +618,7 @@ impl<'tcx> LivenessContext<'_, '_, '_, 'tcx> {
                     .borrowck_context
                     .constraints
                     .liveness_constraints
-                    .add_elements(live_region_vid, live_at);
+                    .add_points(live_region_vid, live_at);
 
                 // There can only be inflowing loans for this region when we are using
                 // `-Zpolonius=next`.