diff --git a/clippy_lints/src/functions.rs b/clippy_lints/src/functions.rs
index 307f03c6928..d657bb6a0b4 100644
--- a/clippy_lints/src/functions.rs
+++ b/clippy_lints/src/functions.rs
@@ -327,7 +327,7 @@ impl<'a, 'tcx: 'a> DerefVisitor<'a, 'tcx> {
     fn check_arg(&self, ptr: &hir::Expr) {
         if let hir::ExprKind::Path(ref qpath) = ptr.node {
             if let Def::Local(id) = self.cx.tables.qpath_def(qpath, ptr.hir_id) {
-                if self.ptrs.contains(&self.cx.tcx.hir().node_to_hir_id(id)) {
+                if self.ptrs.contains(&id) {
                     span_lint(
                         self.cx,
                         NOT_UNSAFE_PTR_ARG_DEREF,
diff --git a/clippy_lints/src/let_if_seq.rs b/clippy_lints/src/let_if_seq.rs
index 5ef3d8dd4ab..1f454c4983a 100644
--- a/clippy_lints/src/let_if_seq.rs
+++ b/clippy_lints/src/let_if_seq.rs
@@ -150,7 +150,7 @@ impl<'a, 'tcx> hir::intravisit::Visitor<'tcx> for UsedVisitor<'a, 'tcx> {
         if_chain! {
             if let hir::ExprKind::Path(ref qpath) = expr.node;
             if let Def::Local(local_id) = self.cx.tables.qpath_def(qpath, expr.hir_id);
-            if self.id == self.cx.tcx.hir().node_to_hir_id(local_id);
+            if self.id == local_id;
             then {
                 self.used = true;
                 return;
@@ -175,7 +175,7 @@ fn check_assign<'a, 'tcx>(
         if let hir::ExprKind::Assign(ref var, ref value) = expr.node;
         if let hir::ExprKind::Path(ref qpath) = var.node;
         if let Def::Local(local_id) = cx.tables.qpath_def(qpath, var.hir_id);
-        if decl == cx.tcx.hir().node_to_hir_id(local_id);
+        if decl == local_id;
         then {
             let mut v = UsedVisitor {
                 cx,
diff --git a/clippy_lints/src/loops.rs b/clippy_lints/src/loops.rs
index 11b4d237c56..ccd8be38868 100644
--- a/clippy_lints/src/loops.rs
+++ b/clippy_lints/src/loops.rs
@@ -790,7 +790,7 @@ fn same_var<'a, 'tcx>(cx: &LateContext<'a, 'tcx>, expr: &Expr, var: HirId) -> bo
         if path.segments.len() == 1;
         if let Def::Local(local_id) = cx.tables.qpath_def(qpath, expr.hir_id);
         // our variable!
-        if cx.tcx.hir().node_to_hir_id(local_id) == var;
+        if local_id == var;
         then {
             return true;
         }
@@ -1663,7 +1663,7 @@ fn check_for_mutability(cx: &LateContext<'_, '_>, bound: &Expr) -> Option<HirId>
                     if let PatKind::Binding(bind_ann, ..) = pat.node;
                     if let BindingAnnotation::Mutable = bind_ann;
                     then {
-                        return Some(cx.tcx.hir().node_to_hir_id(node_id));
+                        return Some(node_id);
                     }
                 }
             }
@@ -1792,9 +1792,7 @@ impl<'a, 'tcx> VarVisitor<'a, 'tcx> {
                     }
                     let def = self.cx.tables.qpath_def(seqpath, seqexpr.hir_id);
                     match def {
-                        Def::Local(node_id) | Def::Upvar(node_id, ..) => {
-                            let hir_id = self.cx.tcx.hir().node_to_hir_id(node_id);
-
+                        Def::Local(hir_id) | Def::Upvar(hir_id, ..) => {
                             let parent_id = self.cx.tcx.hir().get_parent_item(expr.hir_id);
                             let parent_def_id = self.cx.tcx.hir().local_def_id_from_hir_id(parent_id);
                             let extent = self.cx.tcx.region_scope_tree(parent_def_id).var_scope(hir_id.local_id);
@@ -1856,7 +1854,7 @@ impl<'a, 'tcx> Visitor<'tcx> for VarVisitor<'a, 'tcx> {
             then {
                 match self.cx.tables.qpath_def(qpath, expr.hir_id) {
                     Def::Upvar(local_id, ..) => {
-                        if self.cx.tcx.hir().node_to_hir_id(local_id) == self.var {
+                        if local_id == self.var {
                             // we are not indexing anything, record that
                             self.nonindex = true;
                         }
@@ -1864,7 +1862,7 @@ impl<'a, 'tcx> Visitor<'tcx> for VarVisitor<'a, 'tcx> {
                     Def::Local(local_id) =>
                     {
 
-                        if self.cx.tcx.hir().node_to_hir_id(local_id) == self.var {
+                        if local_id == self.var {
                             self.nonindex = true;
                         } else {
                             // not the correct variable, but still a variable
@@ -2209,7 +2207,7 @@ fn var_def_id(cx: &LateContext<'_, '_>, expr: &Expr) -> Option<HirId> {
     if let ExprKind::Path(ref qpath) = expr.node {
         let path_res = cx.tables.qpath_def(qpath, expr.hir_id);
         if let Def::Local(node_id) = path_res {
-            return Some(cx.tcx.hir().node_to_hir_id(node_id));
+            return Some(node_id);
         }
     }
     None
@@ -2404,7 +2402,7 @@ impl<'a, 'tcx> VarCollectorVisitor<'a, 'tcx> {
             then {
                 match def {
                     Def::Local(node_id) | Def::Upvar(node_id, ..) => {
-                        self.ids.insert(self.cx.tcx.hir().node_to_hir_id(node_id));
+                        self.ids.insert(node_id);
                     },
                     Def::Static(def_id, mutable) => {
                         self.def_ids.insert(def_id, mutable);
diff --git a/clippy_lints/src/methods/unnecessary_filter_map.rs b/clippy_lints/src/methods/unnecessary_filter_map.rs
index c081384db4b..c751de865be 100644
--- a/clippy_lints/src/methods/unnecessary_filter_map.rs
+++ b/clippy_lints/src/methods/unnecessary_filter_map.rs
@@ -68,7 +68,7 @@ fn check_expression<'a, 'tcx: 'a>(
                             if let hir::ExprKind::Path(path) = &args[0].node;
                             if let Def::Local(ref local) = cx.tables.qpath_def(path, args[0].hir_id);
                             then {
-                                if arg_id == cx.tcx.hir().node_to_hir_id(*local) {
+                                if arg_id == *local {
                                     return (false, false)
                                 }
                             }
diff --git a/clippy_lints/src/utils/mod.rs b/clippy_lints/src/utils/mod.rs
index 3383e47ac77..e5ce17cf192 100644
--- a/clippy_lints/src/utils/mod.rs
+++ b/clippy_lints/src/utils/mod.rs
@@ -958,7 +958,7 @@ pub fn is_try<'a>(cx: &'_ LateContext<'_, '_>, expr: &'a Expr) -> Option<&'a Exp
             if let PatKind::Binding(_, hir_id, _, None) = pat[0].node;
             if let ExprKind::Path(QPath::Resolved(None, ref path)) = arm.body.node;
             if let Def::Local(lid) = path.def;
-            if cx.tcx.hir().node_to_hir_id(lid) == hir_id;
+            if lid == hir_id;
             then {
                 return true;
             }
diff --git a/clippy_lints/src/utils/usage.rs b/clippy_lints/src/utils/usage.rs
index 521ddbc0865..14711b7fe1b 100644
--- a/clippy_lints/src/utils/usage.rs
+++ b/clippy_lints/src/utils/usage.rs
@@ -33,7 +33,7 @@ pub fn is_potentially_mutated<'a, 'tcx: 'a>(
         Def::Local(id) | Def::Upvar(id, ..) => id,
         _ => return true,
     };
-    mutated_variables(expr, cx).map_or(true, |mutated| mutated.contains(&cx.tcx.hir().node_to_hir_id(id)))
+    mutated_variables(expr, cx).map_or(true, |mutated| mutated.contains(&id))
 }
 
 struct MutVarsDelegate {