Auto merge of rust-lang#88880 - cjgillot:no-krate, r=oli-obk

Rework HIR API to make invocations of the hir_crate query harder.

`hir_crate` forces the recomputation of queries that depend on it.

This PR aims at avoiding useless invocations of `hir_crate` by making dependent code go through `tcx.hir()`.

clippy_lints/src/cargo_common_metadata.rs

@@ -1,7 +1,7 @@
 //! lint on missing cargo common metadata
 
 use clippy_utils::{diagnostics::span_lint, is_lint_allowed};
-use rustc_hir::{hir_id::CRATE_HIR_ID, Crate};
+use rustc_hir::hir_id::CRATE_HIR_ID;
 use rustc_lint::{LateContext, LateLintPass};
 use rustc_session::{declare_tool_lint, impl_lint_pass};
 use rustc_span::source_map::DUMMY_SP;
@@ -77,7 +77,7 @@ fn is_empty_vec(value: &[String]) -> bool {
 }
 
 impl LateLintPass<'_> for CargoCommonMetadata {
-    fn check_crate(&mut self, cx: &LateContext<'_>, _: &Crate<'_>) {
+    fn check_crate(&mut self, cx: &LateContext<'_>) {
         if is_lint_allowed(cx, CARGO_COMMON_METADATA, CRATE_HIR_ID) {
             return;
         }

clippy_lints/src/disallowed_method.rs

@@ -1,7 +1,7 @@
 use clippy_utils::diagnostics::span_lint_and_then;
 use clippy_utils::fn_def_id;
 
-use rustc_hir::{def::Res, def_id::DefIdMap, Crate, Expr};
+use rustc_hir::{def::Res, def_id::DefIdMap, Expr};
 use rustc_lint::{LateContext, LateLintPass};
 use rustc_session::{declare_tool_lint, impl_lint_pass};
 
@@ -70,7 +70,7 @@ impl DisallowedMethod {
 impl_lint_pass!(DisallowedMethod => [DISALLOWED_METHOD]);
 
 impl<'tcx> LateLintPass<'tcx> for DisallowedMethod {
-    fn check_crate(&mut self, cx: &LateContext<'_>, _: &Crate<'_>) {
+    fn check_crate(&mut self, cx: &LateContext<'_>) {
         for conf in &self.conf_disallowed {
             let (path, reason) = match conf {
                 conf::DisallowedMethod::Simple(path) => (path, None),

clippy_lints/src/disallowed_type.rs

@@ -2,7 +2,7 @@ use clippy_utils::diagnostics::span_lint;
 
 use rustc_data_structures::fx::FxHashSet;
 use rustc_hir::{
-    def::Res, def_id::DefId, Crate, Item, ItemKind, PolyTraitRef, PrimTy, TraitBoundModifier, Ty, TyKind, UseKind,
+    def::Res, def_id::DefId, Item, ItemKind, PolyTraitRef, PrimTy, TraitBoundModifier, Ty, TyKind, UseKind,
 };
 use rustc_lint::{LateContext, LateLintPass};
 use rustc_session::{declare_tool_lint, impl_lint_pass};
@@ -75,7 +75,7 @@ impl DisallowedType {
 impl_lint_pass!(DisallowedType => [DISALLOWED_TYPE]);
 
 impl<'tcx> LateLintPass<'tcx> for DisallowedType {
-    fn check_crate(&mut self, cx: &LateContext<'_>, _: &Crate<'_>) {
+    fn check_crate(&mut self, cx: &LateContext<'_>) {
         for path in &self.disallowed {
             let segs = path.iter().map(ToString::to_string).collect::<Vec<_>>();
             match clippy_utils::path_to_res(cx, &segs.iter().map(String::as_str).collect::<Vec<_>>()) {

clippy_lints/src/doc.rs

@@ -212,7 +212,7 @@ impl_lint_pass!(DocMarkdown =>
 );
 
 impl<'tcx> LateLintPass<'tcx> for DocMarkdown {
-    fn check_crate(&mut self, cx: &LateContext<'tcx>, _: &'tcx hir::Crate<'_>) {
+    fn check_crate(&mut self, cx: &LateContext<'tcx>) {
         let attrs = cx.tcx.hir().attrs(hir::CRATE_HIR_ID);
         check_attrs(cx, &self.valid_idents, attrs);
     }

clippy_lints/src/feature_name.rs

@@ -1,6 +1,6 @@
 use clippy_utils::diagnostics::span_lint_and_help;
 use clippy_utils::{diagnostics::span_lint, is_lint_allowed};
-use rustc_hir::{Crate, CRATE_HIR_ID};
+use rustc_hir::CRATE_HIR_ID;
 use rustc_lint::{LateContext, LateLintPass};
 use rustc_session::{declare_lint_pass, declare_tool_lint};
 use rustc_span::source_map::DUMMY_SP;
@@ -110,7 +110,7 @@ fn lint(cx: &LateContext<'_>, feature: &str, substring: &str, is_prefix: bool) {
 }
 
 impl LateLintPass<'_> for FeatureName {
-    fn check_crate(&mut self, cx: &LateContext<'_>, _: &Crate<'_>) {
+    fn check_crate(&mut self, cx: &LateContext<'_>) {
         if is_lint_allowed(cx, REDUNDANT_FEATURE_NAMES, CRATE_HIR_ID)
             && is_lint_allowed(cx, NEGATIVE_FEATURE_NAMES, CRATE_HIR_ID)
         {

clippy_lints/src/inherent_impl.rs

@@ -3,7 +3,7 @@
 use clippy_utils::diagnostics::span_lint_and_note;
 use clippy_utils::{in_macro, is_lint_allowed};
 use rustc_data_structures::fx::FxHashMap;
-use rustc_hir::{def_id::LocalDefId, Crate, Item, ItemKind, Node};
+use rustc_hir::{def_id::LocalDefId, Item, ItemKind, Node};
 use rustc_lint::{LateContext, LateLintPass};
 use rustc_session::{declare_lint_pass, declare_tool_lint};
 use rustc_span::Span;
@@ -44,7 +44,7 @@ declare_clippy_lint! {
 declare_lint_pass!(MultipleInherentImpl => [MULTIPLE_INHERENT_IMPL]);
 
 impl<'tcx> LateLintPass<'tcx> for MultipleInherentImpl {
-    fn check_crate_post(&mut self, cx: &LateContext<'tcx>, _: &'tcx Crate<'_>) {
+    fn check_crate_post(&mut self, cx: &LateContext<'tcx>) {
         // Map from a type to it's first impl block. Needed to distinguish generic arguments.
         // e.g. `Foo<Bar>` and `Foo<Baz>`
         let mut type_map = FxHashMap::default();

clippy_lints/src/macro_use.rs

@@ -135,7 +135,7 @@ impl<'tcx> LateLintPass<'tcx> for MacroUseImports {
         }
     }
     #[allow(clippy::too_many_lines)]
-    fn check_crate_post(&mut self, cx: &LateContext<'_>, _krate: &hir::Crate<'_>) {
+    fn check_crate_post(&mut self, cx: &LateContext<'_>) {
         let mut used = FxHashMap::default();
         let mut check_dup = vec![];
         for (import, span) in &self.imports {

clippy_lints/src/main_recursion.rs

@@ -2,7 +2,7 @@ use clippy_utils::diagnostics::span_lint_and_help;
 use clippy_utils::source::snippet;
 use clippy_utils::{is_entrypoint_fn, is_no_std_crate};
 use if_chain::if_chain;
-use rustc_hir::{Crate, Expr, ExprKind, QPath};
+use rustc_hir::{Expr, ExprKind, QPath};
 use rustc_lint::{LateContext, LateLintPass};
 use rustc_session::{declare_tool_lint, impl_lint_pass};
 
@@ -33,7 +33,7 @@ pub struct MainRecursion {
 impl_lint_pass!(MainRecursion => [MAIN_RECURSION]);
 
 impl LateLintPass<'_> for MainRecursion {
-    fn check_crate(&mut self, cx: &LateContext<'_>, _: &Crate<'_>) {
+    fn check_crate(&mut self, cx: &LateContext<'_>) {
         self.has_no_std_attr = is_no_std_crate(cx);
     }
 

clippy_lints/src/missing_doc.rs

@@ -12,6 +12,7 @@ use rustc_hir as hir;
 use rustc_lint::{LateContext, LateLintPass, LintContext};
 use rustc_middle::ty;
 use rustc_session::{declare_tool_lint, impl_lint_pass};
+use rustc_span::def_id::CRATE_DEF_ID;
 use rustc_span::source_map::Span;
 use rustc_span::sym;
 
@@ -78,9 +79,7 @@ impl MissingDoc {
             return;
         }
 
-        let has_doc = attrs
-            .iter()
-            .any(|a| a.doc_str().is_some());
+        let has_doc = attrs.iter().any(|a| a.doc_str().is_some());
         if !has_doc {
             span_lint(
                 cx,
@@ -104,9 +103,9 @@ impl<'tcx> LateLintPass<'tcx> for MissingDoc {
         self.doc_hidden_stack.pop().expect("empty doc_hidden_stack");
     }
 
-    fn check_crate(&mut self, cx: &LateContext<'tcx>, krate: &'tcx hir::Crate<'_>) {
+    fn check_crate(&mut self, cx: &LateContext<'tcx>) {
         let attrs = cx.tcx.hir().attrs(hir::CRATE_HIR_ID);
-        self.check_missing_docs_attrs(cx, attrs, krate.module().inner, "the", "crate");
+        self.check_missing_docs_attrs(cx, attrs, cx.tcx.def_span(CRATE_DEF_ID), "the", "crate");
     }
 
     fn check_item(&mut self, cx: &LateContext<'tcx>, it: &'tcx hir::Item<'_>) {

clippy_lints/src/missing_enforced_import_rename.rs

@@ -2,7 +2,7 @@ use clippy_utils::{diagnostics::span_lint_and_sugg, source::snippet_opt};
 
 use rustc_data_structures::fx::FxHashMap;
 use rustc_errors::Applicability;
-use rustc_hir::{def::Res, def_id::DefId, Crate, Item, ItemKind, UseKind};
+use rustc_hir::{def::Res, def_id::DefId, Item, ItemKind, UseKind};
 use rustc_lint::{LateContext, LateLintPass, LintContext};
 use rustc_session::{declare_tool_lint, impl_lint_pass};
 use rustc_span::Symbol;
@@ -55,7 +55,7 @@ impl ImportRename {
 impl_lint_pass!(ImportRename => [MISSING_ENFORCED_IMPORT_RENAMES]);
 
 impl LateLintPass<'_> for ImportRename {
-    fn check_crate(&mut self, cx: &LateContext<'_>, _: &Crate<'_>) {
+    fn check_crate(&mut self, cx: &LateContext<'_>) {
         for Rename { path, rename } in &self.conf_renames {
             if let Res::Def(_, id) = clippy_utils::path_to_res(cx, &path.split("::").collect::<Vec<_>>()) {
                 self.renames.insert(id, Symbol::intern(rename));

clippy_lints/src/multiple_crate_versions.rs

@@ -3,7 +3,7 @@
 use clippy_utils::diagnostics::span_lint;
 use clippy_utils::is_lint_allowed;
 use rustc_hir::def_id::LOCAL_CRATE;
-use rustc_hir::{Crate, CRATE_HIR_ID};
+use rustc_hir::CRATE_HIR_ID;
 use rustc_lint::{LateContext, LateLintPass};
 use rustc_session::{declare_lint_pass, declare_tool_lint};
 use rustc_span::source_map::DUMMY_SP;
@@ -41,7 +41,7 @@ declare_clippy_lint! {
 declare_lint_pass!(MultipleCrateVersions => [MULTIPLE_CRATE_VERSIONS]);
 
 impl LateLintPass<'_> for MultipleCrateVersions {
-    fn check_crate(&mut self, cx: &LateContext<'_>, _: &Crate<'_>) {
+    fn check_crate(&mut self, cx: &LateContext<'_>) {
         if is_lint_allowed(cx, MULTIPLE_CRATE_VERSIONS, CRATE_HIR_ID) {
             return;
         }

clippy_lints/src/same_name_method.rs

@@ -1,7 +1,7 @@
 use clippy_utils::diagnostics::span_lint_and_then;
 use rustc_data_structures::fx::FxHashMap;
 use rustc_hir::def::{DefKind, Res};
-use rustc_hir::{Crate, Impl, ItemKind, Node, Path, QPath, TraitRef, TyKind};
+use rustc_hir::{Impl, ItemKind, Node, Path, QPath, TraitRef, TyKind};
 use rustc_lint::{LateContext, LateLintPass};
 use rustc_middle::ty::AssocKind;
 use rustc_session::{declare_lint_pass, declare_tool_lint};
@@ -46,10 +46,10 @@ struct ExistingName {
 }
 
 impl<'tcx> LateLintPass<'tcx> for SameNameMethod {
-    fn check_crate_post(&mut self, cx: &LateContext<'tcx>, krate: &'tcx Crate<'tcx>) {
+    fn check_crate_post(&mut self, cx: &LateContext<'tcx>) {
         let mut map = FxHashMap::<Res, ExistingName>::default();
 
-        for item in krate.items() {
+        for item in cx.tcx.hir().items() {
             if let ItemKind::Impl(Impl {
                 items,
                 of_trait,

clippy_lints/src/wildcard_dependencies.rs

@@ -1,5 +1,5 @@
 use clippy_utils::{diagnostics::span_lint, is_lint_allowed};
-use rustc_hir::{hir_id::CRATE_HIR_ID, Crate};
+use rustc_hir::hir_id::CRATE_HIR_ID;
 use rustc_lint::{LateContext, LateLintPass};
 use rustc_session::{declare_lint_pass, declare_tool_lint};
 use rustc_span::source_map::DUMMY_SP;
@@ -28,7 +28,7 @@ declare_clippy_lint! {
 declare_lint_pass!(WildcardDependencies => [WILDCARD_DEPENDENCIES]);
 
 impl LateLintPass<'_> for WildcardDependencies {
-    fn check_crate(&mut self, cx: &LateContext<'_>, _: &Crate<'_>) {
+    fn check_crate(&mut self, cx: &LateContext<'_>) {
         if is_lint_allowed(cx, WILDCARD_DEPENDENCIES, CRATE_HIR_ID) {
             return;
         }