Remove some unused code relating to ResultsCloned.

Author: nnethercote

compiler/rustc_mir_dataflow/src/framework/cursor.rs

@@ -1,6 +1,6 @@
 //! Random access inspection of the results of a dataflow analysis.
 
-use crate::{framework::BitSetExt, CloneAnalysis};
+use crate::framework::BitSetExt;
 
 use std::borrow::{Borrow, BorrowMut};
 use std::cmp::Ordering;
@@ -104,17 +104,6 @@ where
     }
 }
 
-impl<'res, 'mir, 'tcx, A> ResultsClonedCursor<'res, 'mir, 'tcx, A>
-where
-    A: Analysis<'tcx> + CloneAnalysis,
-{
-    /// Creates a new cursor over the same `Results`. Note that the cursor's position is *not*
-    /// copied.
-    pub fn new_cursor(&self) -> Self {
-        Self::new(self.body, self.results.reclone_analysis())
-    }
-}
-
 impl<'mir, 'tcx, A, R> ResultsCursor<'mir, 'tcx, A, R>
 where
     A: Analysis<'tcx>,

compiler/rustc_mir_dataflow/src/framework/engine.rs

@@ -116,20 +116,6 @@ where
     }
 }
 
-impl<'res, 'tcx, A> ResultsCloned<'res, 'tcx, A>
-where
-    A: Analysis<'tcx> + CloneAnalysis,
-{
-    /// Creates a new `Results` type with a cloned `Analysis` and borrowed entry sets.
-    pub fn reclone_analysis(&self) -> Self {
-        Results {
-            analysis: self.analysis.clone_analysis(),
-            entry_sets: self.entry_sets,
-            _marker: PhantomData,
-        }
-    }
-}
-
 /// A solver for dataflow problems.
 pub struct Engine<'mir, 'tcx, A>
 where

compiler/rustc_mir_dataflow/src/impls/storage_liveness.rs

@@ -18,12 +18,6 @@ impl<'a> MaybeStorageLive<'a> {
     }
 }
 
-impl crate::CloneAnalysis for MaybeStorageLive<'_> {
-    fn clone_analysis(&self) -> Self {
-        self.clone()
-    }
-}
-
 impl<'tcx, 'a> crate::AnalysisDomain<'tcx> for MaybeStorageLive<'a> {
     type Domain = BitSet<Local>;
 
@@ -173,12 +167,6 @@ impl<'res, 'mir, 'tcx> MaybeRequiresStorage<'res, 'mir, 'tcx> {
     }
 }
 
-impl crate::CloneAnalysis for MaybeRequiresStorage<'_, '_, '_> {
-    fn clone_analysis(&self) -> Self {
-        Self { borrowed_locals: self.borrowed_locals.new_cursor() }
-    }
-}
-
 impl<'tcx> crate::AnalysisDomain<'tcx> for MaybeRequiresStorage<'_, '_, 'tcx> {
     type Domain = BitSet<Local>;
 

compiler/rustc_mir_dataflow/src/lib.rs

@@ -23,7 +23,7 @@ pub use self::framework::{
     fmt, lattice, visit_results, Analysis, AnalysisDomain, Direction, GenKill, GenKillAnalysis,
     JoinSemiLattice, MaybeReachable, Results, ResultsCursor, ResultsVisitable, ResultsVisitor,
 };
-use self::framework::{Backward, CloneAnalysis, ResultsClonedCursor, SwitchIntEdgeEffects};
+use self::framework::{Backward, ResultsClonedCursor, SwitchIntEdgeEffects};
 use self::move_paths::MoveData;
 
 pub mod debuginfo;