Remove hir::TraitItem::attrs.

compiler/rustc_ast_lowering/src/item.rs

@@ -851,14 +851,8 @@ impl<'hir> LoweringContext<'_, 'hir> {
             AssocItemKind::MacCall(..) => panic!("macro item shouldn't exist at this point"),
         };
 
-        hir::TraitItem {
+        self.lower_attrs(hir_id, &i.attrs);
-            def_id: trait_item_def_id,
+        hir::TraitItem { def_id: trait_item_def_id, ident: i.ident, generics, kind, span: i.span }
-            ident: i.ident,
-            attrs: self.lower_attrs(hir_id, &i.attrs),
-            generics,
-            kind,
-            span: i.span,
-        }
     }
 
     fn lower_trait_item_ref(&mut self, i: &AssocItem) -> hir::TraitItemRef {

compiler/rustc_hir/src/hir.rs

@@ -2028,7 +2028,6 @@ impl TraitItemId {
 pub struct TraitItem<'hir> {
     pub ident: Ident,
     pub def_id: LocalDefId,
-    pub attrs: &'hir [Attribute],
     pub generics: Generics<'hir>,
     pub kind: TraitItemKind<'hir>,
     pub span: Span,
@@ -3080,7 +3079,7 @@ mod size_asserts {
     rustc_data_structures::static_assert_size!(super::Ty<'static>, 72);
 
     rustc_data_structures::static_assert_size!(super::Item<'static>, 200);
-    rustc_data_structures::static_assert_size!(super::TraitItem<'static>, 144);
+    rustc_data_structures::static_assert_size!(super::TraitItem<'static>, 128);
     rustc_data_structures::static_assert_size!(super::ImplItem<'static>, 168);
     rustc_data_structures::static_assert_size!(super::ForeignItem<'static>, 136);
 }

compiler/rustc_hir/src/stable_hash_impls.rs

@@ -139,11 +139,10 @@ impl<HirCtx: crate::HashStableContext> HashStable<HirCtx> for VisibilityKind<'_>
 
 impl<HirCtx: crate::HashStableContext> HashStable<HirCtx> for TraitItem<'_> {
     fn hash_stable(&self, hcx: &mut HirCtx, hasher: &mut StableHasher) {
-        let TraitItem { def_id: _, ident, ref attrs, ref generics, ref kind, span } = *self;
+        let TraitItem { def_id: _, ident, ref generics, ref kind, span } = *self;
 
         hcx.hash_hir_item_like(|hcx| {
             ident.name.hash_stable(hcx, hasher);
-            attrs.hash_stable(hcx, hasher);
             generics.hash_stable(hcx, hasher);
             kind.hash_stable(hcx, hasher);
             span.hash_stable(hcx, hasher);

compiler/rustc_hir_pretty/src/lib.rs

@@ -949,7 +949,7 @@ impl<'a> State<'a> {
         self.ann.pre(self, AnnNode::SubItem(ti.hir_id()));
         self.hardbreak_if_not_bol();
         self.maybe_print_comment(ti.span.lo());
-        self.print_outer_attributes(&ti.attrs);
+        self.print_outer_attributes(self.attrs(ti.hir_id()));
         match ti.kind {
             hir::TraitItemKind::Const(ref ty, default) => {
                 let vis =

compiler/rustc_save_analysis/src/dump_visitor.rs

@@ -994,6 +994,7 @@ impl<'tcx> DumpVisitor<'tcx> {
             hir::TraitItemKind::Const(ref ty, body) => {
                 let body = body.map(|b| &self.tcx.hir().body(b).value);
                 let respan = respan(vis_span, hir::VisibilityKind::Public);
+                let attrs = self.tcx.hir().attrs(trait_item.hir_id());
                 self.process_assoc_const(
                     trait_item.hir_id(),
                     trait_item.ident,
@@ -1001,7 +1002,7 @@ impl<'tcx> DumpVisitor<'tcx> {
                     body,
                     trait_id,
                     &respan,
-                    &trait_item.attrs,
+                    attrs,
                 );
             }
             hir::TraitItemKind::Fn(ref sig, ref trait_fn) => {
@@ -1027,6 +1028,7 @@ impl<'tcx> DumpVisitor<'tcx> {
                 if !self.span.filter_generated(trait_item.ident.span) {
                     let span = self.span_from_span(trait_item.ident.span);
                     let id = id_from_def_id(trait_item.def_id.to_def_id());
+                    let attrs = self.tcx.hir().attrs(trait_item.hir_id());
 
                     self.dumper.dump_def(
                         &Access { public: true, reachable: true },
@@ -1040,7 +1042,7 @@ impl<'tcx> DumpVisitor<'tcx> {
                             parent: Some(id_from_def_id(trait_id)),
                             children: vec![],
                             decl_id: None,
-                            docs: self.save_ctxt.docs_for_attrs(&trait_item.attrs),
+                            docs: self.save_ctxt.docs_for_attrs(attrs),
                             sig: sig::assoc_type_signature(
                                 trait_item.hir_id(),
                                 trait_item.ident,
@@ -1048,10 +1050,7 @@ impl<'tcx> DumpVisitor<'tcx> {
                                 default_ty.as_ref().map(|ty| &**ty),
                                 &self.save_ctxt,
                             ),
-                            attributes: lower_attributes(
+                            attributes: lower_attributes(attrs.to_vec(), &self.save_ctxt),
-                                trait_item.attrs.to_vec(),
-                                &self.save_ctxt,
-                            ),
                         },
                     );
                 }

compiler/rustc_save_analysis/src/lib.rs

@@ -472,9 +472,9 @@ impl<'tcx> SaveContext<'tcx> {
                         let mut docs = String::new();
                         let mut attrs = vec![];
 
-                        if let Some(Node::TraitItem(item)) = self.tcx.hir().find(hir_id) {
+                        if let Some(Node::TraitItem(_)) = self.tcx.hir().find(hir_id) {
-                            docs = self.docs_for_attrs(&item.attrs);
+                            attrs = self.tcx.hir().attrs(hir_id).to_vec();
-                            attrs = item.attrs.to_vec();
+                            docs = self.docs_for_attrs(&attrs);
                         }
 
                         (

src/tools/clippy/clippy_lints/src/attrs.rs

@@ -359,7 +359,7 @@ impl<'tcx> LateLintPass<'tcx> for Attributes {
 
     fn check_trait_item(&mut self, cx: &LateContext<'tcx>, item: &'tcx TraitItem<'_>) {
         if is_relevant_trait(cx, item) {
-            check_attrs(cx, item.span, item.ident.name, &item.attrs)
+            check_attrs(cx, item.span, item.ident.name, cx.tcx.hir().attrs(item.hir_id()))
         }
     }
 }

src/tools/clippy/clippy_lints/src/doc.rs

@@ -250,7 +250,8 @@ impl<'tcx> LateLintPass<'tcx> for DocMarkdown {
     }
 
     fn check_trait_item(&mut self, cx: &LateContext<'tcx>, item: &'tcx hir::TraitItem<'_>) {
-        let headers = check_attrs(cx, &self.valid_idents, &item.attrs);
+        let attrs = cx.tcx.hir().attrs(item.hir_id());
+        let headers = check_attrs(cx, &self.valid_idents, attrs);
         if let hir::TraitItemKind::Fn(ref sig, ..) = item.kind {
             if !in_external_macro(cx.tcx.sess, item.span) {
                 lint_for_missing_headers(cx, item.hir_id(), item.span, sig, headers, None, None);

src/tools/clippy/clippy_lints/src/functions.rs

@@ -344,7 +344,8 @@ impl<'tcx> LateLintPass<'tcx> for Functions {
                 check_result_unit_err(cx, &sig.decl, item.span, fn_header_span);
             }
 
-            let attr = must_use_attr(&item.attrs);
+            let attrs = cx.tcx.hir().attrs(item.hir_id());
+            let attr = must_use_attr(attrs);
             if let Some(attr) = attr {
                 check_needless_must_use(cx, &sig.decl, item.hir_id(), item.span, fn_header_span, attr);
             }
@@ -352,7 +353,7 @@ impl<'tcx> LateLintPass<'tcx> for Functions {
                 let body = cx.tcx.hir().body(eid);
                 Self::check_raw_ptr(cx, sig.header.unsafety, &sig.decl, body, item.hir_id());
 
-                if attr.is_none() && is_public && !is_proc_macro(cx.sess(), &item.attrs) {
+                if attr.is_none() && is_public && !is_proc_macro(cx.sess(), attrs) {
                     check_must_use_candidate(
                         cx,
                         &sig.decl,

src/tools/clippy/clippy_lints/src/inline_fn_without_body.rs

@@ -34,7 +34,8 @@ declare_lint_pass!(InlineFnWithoutBody => [INLINE_FN_WITHOUT_BODY]);
 impl<'tcx> LateLintPass<'tcx> for InlineFnWithoutBody {
     fn check_trait_item(&mut self, cx: &LateContext<'tcx>, item: &'tcx TraitItem<'_>) {
         if let TraitItemKind::Fn(_, TraitFn::Required(_)) = item.kind {
-            check_attrs(cx, item.ident.name, &item.attrs);
+            let attrs = cx.tcx.hir().attrs(item.hir_id());
+            check_attrs(cx, item.ident.name, attrs);
         }
     }
 }

src/tools/clippy/clippy_lints/src/missing_doc.rs

@@ -167,7 +167,8 @@ impl<'tcx> LateLintPass<'tcx> for MissingDoc {
     fn check_trait_item(&mut self, cx: &LateContext<'tcx>, trait_item: &'tcx hir::TraitItem<'_>) {
         let (article, desc) = cx.tcx.article_and_description(trait_item.def_id.to_def_id());
 
-        self.check_missing_docs_attrs(cx, &trait_item.attrs, trait_item.span, article, desc);
+        let attrs = cx.tcx.hir().attrs(trait_item.hir_id());
+        self.check_missing_docs_attrs(cx, attrs, trait_item.span, article, desc);
     }
 
     fn check_impl_item(&mut self, cx: &LateContext<'tcx>, impl_item: &'tcx hir::ImplItem<'_>) {

src/tools/clippy/clippy_lints/src/missing_inline.rs

@@ -108,7 +108,8 @@ impl<'tcx> LateLintPass<'tcx> for MissingInline {
                                 // an impl is not provided
                                 let desc = "a default trait method";
                                 let item = cx.tcx.hir().trait_item(tit.id);
-                                check_missing_inline_attrs(cx, &item.attrs, item.span, desc);
+                                let attrs = cx.tcx.hir().attrs(item.hir_id());
+                                check_missing_inline_attrs(cx, attrs, item.span, desc);
                             }
                         },
                     }