in which some node_to_hir_id calls become hir_id field accesses

For rust-lang#50928.

src/librustc/infer/error_reporting/nice_region_error/find_anon_type.rs

@@ -124,8 +124,7 @@ impl<'a, 'gcx, 'tcx> Visitor<'gcx> for FindNestedTypeVisitor<'a, 'gcx, 'tcx> {
 
             hir::TyRptr(ref lifetime, _) => {
                 // the lifetime of the TyRptr
-                let hir_id = self.tcx.hir.node_to_hir_id(lifetime.id);
-                match (self.tcx.named_region(hir_id), self.bound_region) {
+                match (self.tcx.named_region(lifetime.hir_id), self.bound_region) {
                     // Find the index of the anonymous region that was part of the
                     // error. We will then search the function parameters for a bound
                     // region at the right depth with the same index
@@ -231,8 +230,7 @@ impl<'a, 'gcx, 'tcx> Visitor<'gcx> for TyPathVisitor<'a, 'gcx, 'tcx> {
     }
 
     fn visit_lifetime(&mut self, lifetime: &hir::Lifetime) {
-        let hir_id = self.tcx.hir.node_to_hir_id(lifetime.id);
-        match (self.tcx.named_region(hir_id), self.bound_region) {
+        match (self.tcx.named_region(lifetime.hir_id), self.bound_region) {
             // the lifetime of the TyPath!
             (Some(rl::Region::LateBoundAnon(debruijn_index, anon_index)), ty::BrAnon(br_index)) => {
                 if debruijn_index == self.current_index && anon_index == br_index {

src/librustc/middle/region.rs

@@ -909,7 +909,7 @@ fn resolve_pat<'a, 'tcx>(visitor: &mut RegionResolutionVisitor<'a, 'tcx>, pat: &
 }
 
 fn resolve_stmt<'a, 'tcx>(visitor: &mut RegionResolutionVisitor<'a, 'tcx>, stmt: &'tcx hir::Stmt) {
-    let stmt_id = visitor.tcx.hir.node_to_hir_id(stmt.node.id()).local_id;
+    let stmt_id = stmt.node.hir_id().local_id;
     debug!("resolve_stmt(stmt.id={:?})", stmt_id);
 
     // Every statement will clean up the temporaries created during

src/librustc_typeck/astconv.rs

@@ -109,8 +109,7 @@ impl<'o, 'gcx: 'tcx, 'tcx> AstConv<'gcx, 'tcx>+'o {
             tcx.hir.name(tcx.hir.as_local_node_id(def_id).unwrap()).as_interned_str()
         };
 
-        let hir_id = tcx.hir.node_to_hir_id(lifetime.id);
-        let r = match tcx.named_region(hir_id) {
+        let r = match tcx.named_region(lifetime.hir_id) {
             Some(rl::Region::Static) => {
                 tcx.types.re_static
             }
@@ -738,8 +737,7 @@ impl<'o, 'gcx: 'tcx, 'tcx> AstConv<'gcx, 'tcx>+'o {
             self.ast_region_to_region(lifetime, None)
         } else {
             self.compute_object_lifetime_bound(span, existential_predicates).unwrap_or_else(|| {
-                let hir_id = tcx.hir.node_to_hir_id(lifetime.id);
-                if tcx.named_region(hir_id).is_some() {
+                if tcx.named_region(lifetime.hir_id).is_some() {
                     self.ast_region_to_region(lifetime, None)
                 } else {
                     self.re_infer(span, None).unwrap_or_else(|| {

src/librustc_typeck/collect.rs

@@ -722,8 +722,7 @@ fn has_late_bound_regions<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>,
         fn visit_lifetime(&mut self, lt: &'tcx hir::Lifetime) {
             if self.has_late_bound_regions.is_some() { return }
 
-            let hir_id = self.tcx.hir.node_to_hir_id(lt.id);
-            match self.tcx.named_region(hir_id) {
+            match self.tcx.named_region(lt.hir_id) {
                 Some(rl::Region::Static) | Some(rl::Region::EarlyBound(..)) => {}
                 Some(rl::Region::LateBound(debruijn, _, _)) |
                 Some(rl::Region::LateBoundAnon(debruijn, _))
@@ -750,8 +749,7 @@ fn has_late_bound_regions<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>,
         for param in &generics.params {
             match param.kind {
                 GenericParamKind::Lifetime { .. } => {
-                    let hir_id = tcx.hir.node_to_hir_id(param.id);
-                    if tcx.is_late_bound(hir_id) {
+                    if tcx.is_late_bound(param.hir_id) {
                         return Some(param.span);
                     }
                 }
@@ -1303,8 +1301,7 @@ fn early_bound_lifetimes_from_generics<'a, 'tcx>(
 {
     generics.params.iter().filter(move |param| match param.kind {
         GenericParamKind::Lifetime { .. } => {
-            let hir_id = tcx.hir.node_to_hir_id(param.id);
-            !tcx.is_late_bound(hir_id)
+            !tcx.is_late_bound(param.hir_id)
         }
         _ => false,
     })

src/librustdoc/clean/mod.rs

@@ -1651,8 +1651,7 @@ impl Lifetime {
 impl Clean<Lifetime> for hir::Lifetime {
     fn clean(&self, cx: &DocContext) -> Lifetime {
         if self.id != ast::DUMMY_NODE_ID {
-            let hir_id = cx.tcx.hir.node_to_hir_id(self.id);
-            let def = cx.tcx.named_region(hir_id);
+            let def = cx.tcx.named_region(self.hir_id);
             match def {
                 Some(rl::Region::EarlyBound(_, node_id, _)) |
                 Some(rl::Region::LateBound(_, node_id, _)) |