Rollup of 5 pull requests

compiler/rustc_ast_lowering/src/index.rs

@@ -192,9 +192,7 @@ impl<'a, 'hir> Visitor<'hir> for NodeCollector<'a, 'hir> {
     }
 
     fn visit_pat(&mut self, pat: &'hir Pat<'hir>) {
-        let node =
-            if let PatKind::Binding(..) = pat.kind { Node::Binding(pat) } else { Node::Pat(pat) };
-        self.insert(pat.span, pat.hir_id, node);
+        self.insert(pat.span, pat.hir_id, Node::Pat(pat));
 
         self.with_parent(pat.hir_id, |this| {
             intravisit::walk_pat(this, pat);

compiler/rustc_borrowck/src/borrow_set.rs

@@ -92,9 +92,9 @@ impl LocalsStateAtExit {
         struct HasStorageDead(BitSet<Local>);
 
         impl<'tcx> Visitor<'tcx> for HasStorageDead {
-            fn visit_local(&mut self, local: &Local, ctx: PlaceContext, _: Location) {
+            fn visit_local(&mut self, local: Local, ctx: PlaceContext, _: Location) {
                 if ctx == PlaceContext::NonUse(NonUseContext::StorageDead) {
-                    self.0.insert(*local);
+                    self.0.insert(local);
                 }
             }
         }
@@ -223,7 +223,7 @@ impl<'a, 'tcx> Visitor<'tcx> for GatherBorrows<'a, 'tcx> {
         self.super_assign(assigned_place, rvalue, location)
     }
 
-    fn visit_local(&mut self, temp: &Local, context: PlaceContext, location: Location) {
+    fn visit_local(&mut self, temp: Local, context: PlaceContext, location: Location) {
         if !context.is_use() {
             return;
         }
@@ -232,7 +232,7 @@ impl<'a, 'tcx> Visitor<'tcx> for GatherBorrows<'a, 'tcx> {
         // check whether we (earlier) saw a 2-phase borrow like
         //
         //     TMP = &mut place
-        if let Some(&borrow_index) = self.pending_activations.get(temp) {
+        if let Some(&borrow_index) = self.pending_activations.get(&temp) {
             let borrow_data = &mut self.location_map[borrow_index.as_usize()];
 
             // Watch out: the use of TMP in the borrow itself

compiler/rustc_borrowck/src/diagnostics/find_all_local_uses.rs

@@ -18,8 +18,8 @@ struct AllLocalUsesVisitor {
 }
 
 impl<'tcx> Visitor<'tcx> for AllLocalUsesVisitor {
-    fn visit_local(&mut self, local: &Local, _context: PlaceContext, location: Location) {
-        if *local == self.for_local {
+    fn visit_local(&mut self, local: Local, _context: PlaceContext, location: Location) {
+        if local == self.for_local {
             self.uses.insert(location);
         }
     }

compiler/rustc_borrowck/src/diagnostics/find_use.rs

@@ -106,7 +106,7 @@ enum DefUseResult {
 }
 
 impl<'cx, 'tcx> Visitor<'tcx> for DefUseVisitor<'cx, 'tcx> {
-    fn visit_local(&mut self, &local: &Local, context: PlaceContext, _: Location) {
+    fn visit_local(&mut self, local: Local, context: PlaceContext, _: Location) {
         let local_ty = self.body.local_decls[local].ty;
 
         let mut found_it = false;

compiler/rustc_borrowck/src/diagnostics/mutability_errors.rs

@@ -362,7 +362,7 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
 
                 let upvar_hir_id = captured_place.get_root_variable();
 
-                if let Some(Node::Binding(pat)) = self.infcx.tcx.hir().find(upvar_hir_id)
+                if let Some(Node::Pat(pat)) = self.infcx.tcx.hir().find(upvar_hir_id)
                     && let hir::PatKind::Binding(
                         hir::BindingAnnotation::Unannotated,
                         _,

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

@@ -157,7 +157,7 @@ impl LocalUseMapBuild<'_> {
 }
 
 impl Visitor<'_> for LocalUseMapBuild<'_> {
-    fn visit_local(&mut self, &local: &Local, context: PlaceContext, location: Location) {
+    fn visit_local(&mut self, local: Local, context: PlaceContext, location: Location) {
         if self.locals_with_use_data[local] {
             match def_use::categorize(context) {
                 Some(DefUse::Def) => self.insert_def(local, location),

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

@@ -54,7 +54,7 @@ impl UseFactsExtractor<'_, '_> {
 }
 
 impl<'a, 'tcx> Visitor<'tcx> for UseFactsExtractor<'a, 'tcx> {
-    fn visit_local(&mut self, &local: &Local, context: PlaceContext, location: Location) {
+    fn visit_local(&mut self, local: Local, context: PlaceContext, location: Location) {
         match def_use::categorize(context) {
             Some(DefUse::Def) => self.insert_def(local, location),
             Some(DefUse::Use) => self.insert_use(local, location),

compiler/rustc_borrowck/src/type_check/mod.rs

@@ -333,9 +333,9 @@ struct TypeVerifier<'a, 'b, 'tcx> {
 }
 
 impl<'a, 'b, 'tcx> Visitor<'tcx> for TypeVerifier<'a, 'b, 'tcx> {
-    fn visit_span(&mut self, span: &Span) {
+    fn visit_span(&mut self, span: Span) {
         if !span.is_dummy() {
-            self.last_span = *span;
+            self.last_span = span;
         }
     }
 

compiler/rustc_borrowck/src/used_muts.rs

@@ -91,8 +91,8 @@ impl<'visit, 'cx, 'tcx> Visitor<'tcx> for GatherUsedMutsVisitor<'visit, 'cx, 'tc
         self.super_statement(statement, location);
     }
 
-    fn visit_local(&mut self, local: &Local, place_context: PlaceContext, location: Location) {
-        if place_context.is_place_assignment() && self.temporary_used_locals.contains(local) {
+    fn visit_local(&mut self, local: Local, place_context: PlaceContext, location: Location) {
+        if place_context.is_place_assignment() && self.temporary_used_locals.contains(&local) {
             // Propagate the Local assigned at this Location as a used mutable local variable
             for moi in &self.mbcx.move_data.loc_map[location] {
                 let mpi = &self.mbcx.move_data.moves[*moi].path;

compiler/rustc_codegen_ssa/src/mir/analyze.rs

@@ -143,13 +143,13 @@ impl<'mir, 'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> LocalAnalyzer<'mir, 'a, 'tcx,
             // now that we have moved to the "slice of projections" representation.
             if let mir::ProjectionElem::Index(local) = elem {
                 self.visit_local(
-                    &local,
+                    local,
                     PlaceContext::NonMutatingUse(NonMutatingUseContext::Copy),
                     location,
                 );
             }
         } else {
-            self.visit_local(&place_ref.local, context, location);
+            self.visit_local(place_ref.local, context, location);
         }
     }
 }
@@ -185,7 +185,7 @@ impl<'mir, 'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> Visitor<'tcx>
         self.process_place(&place.as_ref(), context, location);
     }
 
-    fn visit_local(&mut self, &local: &mir::Local, context: PlaceContext, location: Location) {
+    fn visit_local(&mut self, local: mir::Local, context: PlaceContext, location: Location) {
         match context {
             PlaceContext::MutatingUse(MutatingUseContext::Call)
             | PlaceContext::MutatingUse(MutatingUseContext::Yield) => {

compiler/rustc_const_eval/src/interpret/cast.rs

@@ -202,7 +202,7 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
         let ptr = self.scalar_to_ptr(scalar)?;
         match ptr.into_pointer_or_addr() {
             Ok(ptr) => M::expose_ptr(self, ptr)?,
-            Err(_) => {} // do nothing, exposing an invalid pointer has no meaning
+            Err(_) => {} // Do nothing, exposing an invalid pointer (`None` provenance) is a NOP.
         };
         Ok(self.cast_from_int_like(scalar, src.layout, cast_ty)?.into())
     }

compiler/rustc_const_eval/src/interpret/validity.rs

@@ -244,7 +244,7 @@ impl<'rt, 'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> ValidityVisitor<'rt, 'mir, '
                         // for a generator).
                         let var_hir_id = captured_place.get_root_variable();
                         let node = self.ecx.tcx.hir().get(var_hir_id);
-                        if let hir::Node::Binding(pat) = node {
+                        if let hir::Node::Pat(pat) = node {
                             if let hir::PatKind::Binding(_, _, ident, _) = pat.kind {
                                 name = Some(ident.name);
                             }

compiler/rustc_const_eval/src/transform/check_consts/check.rs

@@ -418,7 +418,7 @@ impl<'tcx> Visitor<'tcx> for Checker<'_, 'tcx> {
                             PlaceContext::MutatingUse(MutatingUseContext::Borrow)
                         }
                     };
-                    self.visit_local(&reborrowed_place_ref.local, ctx, location);
+                    self.visit_local(reborrowed_place_ref.local, ctx, location);
                     self.visit_projection(reborrowed_place_ref, ctx, location);
                     return;
                 }
@@ -431,7 +431,7 @@ impl<'tcx> Visitor<'tcx> for Checker<'_, 'tcx> {
                         }
                         Mutability::Mut => PlaceContext::MutatingUse(MutatingUseContext::AddressOf),
                     };
-                    self.visit_local(&reborrowed_place_ref.local, ctx, location);
+                    self.visit_local(reborrowed_place_ref.local, ctx, location);
                     self.visit_projection(reborrowed_place_ref, ctx, location);
                     return;
                 }

compiler/rustc_const_eval/src/transform/promote_consts.rs

@@ -106,7 +106,7 @@ struct Collector<'a, 'tcx> {
 }
 
 impl<'tcx> Visitor<'tcx> for Collector<'_, 'tcx> {
-    fn visit_local(&mut self, &index: &Local, context: PlaceContext, location: Location) {
+    fn visit_local(&mut self, index: Local, context: PlaceContext, location: Location) {
         debug!("visit_local: index={:?} context={:?} location={:?}", index, context, location);
         // We're only interested in temporaries and the return place
         match self.ccx.body.local_kind(index) {

compiler/rustc_const_eval/src/transform/validate.rs

@@ -196,8 +196,8 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
 }
 
 impl<'a, 'tcx> Visitor<'tcx> for TypeChecker<'a, 'tcx> {
-    fn visit_local(&mut self, local: &Local, context: PlaceContext, location: Location) {
-        if self.body.local_decls.get(*local).is_none() {
+    fn visit_local(&mut self, local: Local, context: PlaceContext, location: Location) {
+        if self.body.local_decls.get(local).is_none() {
             self.fail(
                 location,
                 format!("local {:?} has no corresponding declaration in `body.local_decls`", local),
@@ -208,7 +208,7 @@ impl<'a, 'tcx> Visitor<'tcx> for TypeChecker<'a, 'tcx> {
             // Uses of locals must occur while the local's storage is allocated.
             self.storage_liveness.seek_after_primary_effect(location);
             let locals_with_storage = self.storage_liveness.get();
-            if !locals_with_storage.contains(*local) {
+            if !locals_with_storage.contains(local) {
                 self.fail(location, format!("use of local {:?}, which has no storage here", local));
             }
         }
@@ -823,8 +823,8 @@ impl<'a, 'tcx> Visitor<'tcx> for TypeChecker<'a, 'tcx> {
         self.super_terminator(terminator, location);
     }
 
-    fn visit_source_scope(&mut self, scope: &SourceScope) {
-        if self.body.source_scopes.get(*scope).is_none() {
+    fn visit_source_scope(&mut self, scope: SourceScope) {
+        if self.body.source_scopes.get(scope).is_none() {
             self.tcx.sess.diagnostic().delay_span_bug(
                 self.body.span,
                 &format!(

compiler/rustc_const_eval/src/util/collect_writes.rs

@@ -24,8 +24,8 @@ struct FindLocalAssignmentVisitor {
 }
 
 impl<'tcx> Visitor<'tcx> for FindLocalAssignmentVisitor {
-    fn visit_local(&mut self, local: &Local, place_context: PlaceContext, location: Location) {
-        if self.needle != *local {
+    fn visit_local(&mut self, local: Local, place_context: PlaceContext, location: Location) {
+        if self.needle != local {
             return;
         }
 

compiler/rustc_hir/src/hir.rs

@@ -3326,7 +3326,6 @@ pub enum Node<'hir> {
     Ty(&'hir Ty<'hir>),
     TypeBinding(&'hir TypeBinding<'hir>),
     TraitRef(&'hir TraitRef<'hir>),
-    Binding(&'hir Pat<'hir>),
     Pat(&'hir Pat<'hir>),
     Arm(&'hir Arm<'hir>),
     Block(&'hir Block<'hir>),
@@ -3378,7 +3377,6 @@ impl<'hir> Node<'hir> {
             | Node::Block(..)
             | Node::Ctor(..)
             | Node::Pat(..)
-            | Node::Binding(..)
             | Node::Arm(..)
             | Node::Local(..)
             | Node::Crate(..)

compiler/rustc_hir_pretty/src/lib.rs

@@ -87,7 +87,7 @@ impl<'a> State<'a> {
             Node::Ty(a) => self.print_type(&a),
             Node::TypeBinding(a) => self.print_type_binding(&a),
             Node::TraitRef(a) => self.print_trait_ref(&a),
-            Node::Binding(a) | Node::Pat(a) => self.print_pat(&a),
+            Node::Pat(a) => self.print_pat(&a),
             Node::Arm(a) => self.print_arm(&a),
             Node::Infer(_) => self.word("_"),
             Node::Block(a) => {

compiler/rustc_middle/src/hir/map/mod.rs

@@ -302,7 +302,6 @@ impl<'hir> Map<'hir> {
             | Node::Infer(_)
             | Node::TraitRef(_)
             | Node::Pat(_)
-            | Node::Binding(_)
             | Node::Local(_)
             | Node::Param(_)
             | Node::Arm(_)
@@ -901,7 +900,7 @@ impl<'hir> Map<'hir> {
     #[inline]
     fn opt_ident(self, id: HirId) -> Option<Ident> {
         match self.get(id) {
-            Node::Binding(&Pat { kind: PatKind::Binding(_, _, ident, _), .. }) => Some(ident),
+            Node::Pat(&Pat { kind: PatKind::Binding(_, _, ident, _), .. }) => Some(ident),
             // A `Ctor` doesn't have an identifier itself, but its parent
             // struct/variant does. Compare with `hir::Map::opt_span`.
             Node::Ctor(..) => match self.find(self.get_parent_node(id))? {
@@ -1046,7 +1045,6 @@ impl<'hir> Map<'hir> {
             Node::Ty(ty) => ty.span,
             Node::TypeBinding(tb) => tb.span,
             Node::TraitRef(tr) => tr.path.span,
-            Node::Binding(pat) => pat.span,
             Node::Pat(pat) => pat.span,
             Node::Arm(arm) => arm.span,
             Node::Block(block) => block.span,
@@ -1263,7 +1261,6 @@ fn hir_id_to_string(map: Map<'_>, id: HirId) -> String {
         Some(Node::Ty(_)) => node_str("type"),
         Some(Node::TypeBinding(_)) => node_str("type binding"),
         Some(Node::TraitRef(_)) => node_str("trait ref"),
-        Some(Node::Binding(_)) => node_str("local"),
         Some(Node::Pat(_)) => node_str("pat"),
         Some(Node::Param(_)) => node_str("param"),
         Some(Node::Arm(_)) => node_str("arm"),