Feed a bunch of queries instead of tracking fields on TyCtxt

compiler/rustc_ast_lowering/src/lib.rs

@@ -416,8 +416,7 @@ fn compute_hir_hash(
 
 pub fn lower_to_hir(tcx: TyCtxt<'_>, (): ()) -> hir::Crate<'_> {
     let sess = tcx.sess;
-    let krate = tcx.untracked_crate.steal();
-    let mut resolver = tcx.resolver_for_lowering(()).steal();
+    let (mut resolver, krate) = tcx.resolver_for_lowering(()).steal();
 
     let ast_index = index_crate(&resolver.node_id_to_def_id, &krate);
     let mut owners = IndexVec::from_fn_n(

compiler/rustc_interface/src/passes.rs

@@ -817,23 +817,26 @@ pub fn create_global_ctxt<'tcx>(
                 lint_store,
                 arena,
                 hir_arena,
-                untracked_resolutions,
                 untracked,
-                krate,
                 dep_graph,
                 queries.on_disk_cache.as_ref().map(OnDiskCache::as_dyn),
                 queries.as_dyn(),
                 rustc_query_impl::query_callbacks(arena),
-                crate_name,
-                outputs,
             )
         })
     });
 
     let mut qcx = QueryContext { gcx };
     qcx.enter(|tcx| {
-        tcx.feed_unit_query()
-            .resolver_for_lowering(tcx.arena.alloc(Steal::new(untracked_resolver_for_lowering)))
+        let feed = tcx.feed_unit_query();
+        feed.resolver_for_lowering(
+            tcx.arena.alloc(Steal::new((untracked_resolver_for_lowering, krate))),
+        );
+        feed.resolutions(tcx.arena.alloc(untracked_resolutions));
+        feed.output_filenames(tcx.arena.alloc(std::sync::Arc::new(outputs)));
+        feed.features_query(sess.features_untracked());
+        let feed = tcx.feed_local_crate();
+        feed.crate_name(crate_name);
     });
     qcx
 }

compiler/rustc_lint/src/expect.rs

@@ -12,7 +12,7 @@ pub(crate) fn provide(providers: &mut Providers) {
 }
 
 fn check_expectations(tcx: TyCtxt<'_>, tool_filter: Option<Symbol>) {
-    if !tcx.sess.features_untracked().enabled(sym::lint_reasons) {
+    if !tcx.features().enabled(sym::lint_reasons) {
         return;
     }
 

compiler/rustc_middle/src/arena.rs

@@ -30,7 +30,12 @@ macro_rules! arena_types {
             [decode] typeck_results: rustc_middle::ty::TypeckResults<'tcx>,
             [decode] borrowck_result:
                 rustc_middle::mir::BorrowCheckResult<'tcx>,
-            [] resolver: rustc_data_structures::steal::Steal<rustc_middle::ty::ResolverAstLowering>,
+            [] resolver: rustc_data_structures::steal::Steal<(
+                rustc_middle::ty::ResolverAstLowering,
+                rustc_data_structures::sync::Lrc<rustc_ast::Crate>,
+            )>,
+            [] output_filenames: std::sync::Arc<rustc_session::config::OutputFilenames>,
+            [] resolutions: rustc_middle::ty::ResolverGlobalCtxt,
             [decode] unsafety_check_result: rustc_middle::mir::UnsafetyCheckResult,
             [decode] code_region: rustc_middle::mir::coverage::CodeRegion,
             [] const_allocs: rustc_middle::mir::interpret::Allocation,

compiler/rustc_middle/src/query/mod.rs

@@ -27,12 +27,12 @@ rustc_queries! {
     }
 
     query resolutions(_: ()) -> &'tcx ty::ResolverGlobalCtxt {
-        eval_always
+        feedable
         no_hash
         desc { "getting the resolver outputs" }
     }
 
-    query resolver_for_lowering(_: ()) -> &'tcx Steal<ty::ResolverAstLowering> {
+    query resolver_for_lowering(_: ()) -> &'tcx Steal<(ty::ResolverAstLowering, Lrc<ast::Crate>)> {
         feedable
         no_hash
         desc { "getting the resolver for lowering" }
@@ -1673,7 +1673,7 @@ rustc_queries! {
 
     /// Gets the name of the crate.
     query crate_name(_: CrateNum) -> Symbol {
-        eval_always
+        feedable
         desc { "fetching what a crate is named" }
         separate_provide_extern
     }
@@ -1857,7 +1857,7 @@ rustc_queries! {
     /// This query returns an `&Arc` because codegen backends need the value even after the `TyCtxt`
     /// has been destroyed.
     query output_filenames(_: ()) -> &'tcx Arc<OutputFilenames> {
-        eval_always
+        feedable
         desc { "getting output filenames" }
     }
 
@@ -2041,7 +2041,7 @@ rustc_queries! {
     }
 
     query features_query(_: ()) -> &'tcx rustc_feature::Features {
-        eval_always
+        feedable
         desc { "looking up enabled feature gates" }
     }
 

compiler/rustc_middle/src/ty/context.rs

@@ -51,7 +51,7 @@ use rustc_macros::HashStable;
 use rustc_query_system::dep_graph::DepNodeIndex;
 use rustc_query_system::ich::StableHashingContext;
 use rustc_serialize::opaque::{FileEncodeResult, FileEncoder};
-use rustc_session::config::{CrateType, OutputFilenames};
+use rustc_session::config::CrateType;
 use rustc_session::cstore::{CrateStoreDyn, Untracked};
 use rustc_session::lint::Lint;
 use rustc_session::Limit;
@@ -74,7 +74,6 @@ use std::hash::{Hash, Hasher};
 use std::iter;
 use std::mem;
 use std::ops::{Bound, Deref};
-use std::sync::Arc;
 
 pub trait OnDiskCache<'tcx>: rustc_data_structures::sync::Sync {
     /// Creates a new `OnDiskCache` instance from the serialized data in `data`.
@@ -363,6 +362,9 @@ impl<'tcx> TyCtxt<'tcx> {
     pub fn feed_unit_query(self) -> TyCtxtFeed<'tcx, ()> {
         TyCtxtFeed { tcx: self, key: () }
     }
+    pub fn feed_local_crate(self) -> TyCtxtFeed<'tcx, CrateNum> {
+        TyCtxtFeed { tcx: self, key: LOCAL_CRATE }
+    }
 }
 
 impl<'tcx, KEY: Copy> TyCtxtFeed<'tcx, KEY> {
@@ -428,11 +430,6 @@ pub struct GlobalCtxt<'tcx> {
     pub consts: CommonConsts<'tcx>,
 
     untracked: Untracked,
-    /// Output of the resolver.
-    pub(crate) untracked_resolutions: ty::ResolverGlobalCtxt,
-    /// The entire crate as AST. This field serves as the input for the hir_crate query,
-    /// which lowers it from AST to HIR. It must not be read or used by anything else.
-    pub untracked_crate: Steal<Lrc<ast::Crate>>,
 
     /// This provides access to the incremental compilation on-disk cache for query results.
     /// Do not access this directly. It is only meant to be used by
@@ -457,17 +454,11 @@ pub struct GlobalCtxt<'tcx> {
     /// Merge this with `selection_cache`?
     pub evaluation_cache: traits::EvaluationCache<'tcx>,
 
-    /// The definite name of the current crate after taking into account
-    /// attributes, commandline parameters, etc.
-    crate_name: Symbol,
-
     /// Data layout specification for the current target.
     pub data_layout: TargetDataLayout,
 
     /// Stores memory for globals (statics/consts).
     pub(crate) alloc_map: Lock<interpret::AllocMap<'tcx>>,
-
-    output_filenames: Arc<OutputFilenames>,
 }
 
 impl<'tcx> TyCtxt<'tcx> {
@@ -592,15 +583,11 @@ impl<'tcx> TyCtxt<'tcx> {
         lint_store: Lrc<dyn Any + sync::Send + sync::Sync>,
         arena: &'tcx WorkerLocal<Arena<'tcx>>,
         hir_arena: &'tcx WorkerLocal<hir::Arena<'tcx>>,
-        untracked_resolutions: ty::ResolverGlobalCtxt,
         untracked: Untracked,
-        krate: Lrc<ast::Crate>,
         dep_graph: DepGraph,
         on_disk_cache: Option<&'tcx dyn OnDiskCache<'tcx>>,
         queries: &'tcx dyn query::QueryEngine<'tcx>,
         query_kinds: &'tcx [DepKindStruct<'tcx>],
-        crate_name: Symbol,
-        output_filenames: OutputFilenames,
     ) -> GlobalCtxt<'tcx> {
         let data_layout = s.target.parse_data_layout().unwrap_or_else(|err| {
             s.emit_fatal(err);
@@ -622,8 +609,6 @@ impl<'tcx> TyCtxt<'tcx> {
             lifetimes: common_lifetimes,
             consts: common_consts,
             untracked,
-            untracked_resolutions,
-            untracked_crate: Steal::new(krate),
             on_disk_cache,
             queries,
             query_caches: query::QueryCaches::default(),
@@ -632,10 +617,8 @@ impl<'tcx> TyCtxt<'tcx> {
             pred_rcache: Default::default(),
             selection_cache: Default::default(),
             evaluation_cache: Default::default(),
-            crate_name,
             data_layout,
             alloc_map: Lock::new(interpret::AllocMap::new()),
-            output_filenames: Arc::new(output_filenames),
         }
     }
 
@@ -810,7 +793,7 @@ impl<'tcx> TyCtxt<'tcx> {
         // statements within the query system and we'd run into endless
         // recursion otherwise.
         let (crate_name, stable_crate_id) = if def_id.is_local() {
-            (self.crate_name, self.sess.local_stable_crate_id())
+            (self.crate_name(LOCAL_CRATE), self.sess.local_stable_crate_id())
         } else {
             let cstore = &*self.untracked.cstore;
             (cstore.crate_name(def_id.krate), cstore.stable_crate_id(def_id.krate))
@@ -2407,13 +2390,8 @@ fn ptr_eq<T, U>(t: *const T, u: *const U) -> bool {
 }
 
 pub fn provide(providers: &mut ty::query::Providers) {
-    providers.resolutions = |tcx, ()| &tcx.untracked_resolutions;
     providers.module_reexports =
         |tcx, id| tcx.resolutions(()).reexport_map.get(&id).map(|v| &v[..]);
-    providers.crate_name = |tcx, id| {
-        assert_eq!(id, LOCAL_CRATE);
-        tcx.crate_name
-    };
     providers.maybe_unused_trait_imports =
         |tcx, ()| &tcx.resolutions(()).maybe_unused_trait_imports;
     providers.maybe_unused_extern_crates =
@@ -2424,8 +2402,6 @@ pub fn provide(providers: &mut ty::query::Providers) {
 
     providers.extern_mod_stmt_cnum =
         |tcx, id| tcx.resolutions(()).extern_crate_map.get(&id).cloned();
-    providers.output_filenames = |tcx, ()| &tcx.output_filenames;
-    providers.features_query = |tcx, ()| tcx.sess.features_untracked();
     providers.is_panic_runtime = |tcx, cnum| {
         assert_eq!(cnum, LOCAL_CRATE);
         tcx.sess.contains_name(tcx.hir().krate_attrs(), sym::panic_runtime)

src/librustdoc/doctest.rs

@@ -1221,7 +1221,7 @@ impl<'a, 'hir, 'tcx> HirCollector<'a, 'hir, 'tcx> {
     ) {
         let ast_attrs = self.tcx.hir().attrs(hir_id);
         if let Some(ref cfg) = ast_attrs.cfg(self.tcx, &FxHashSet::default()) {
-            if !cfg.matches(&self.sess.parse_sess, Some(self.sess.features_untracked())) {
+            if !cfg.matches(&self.sess.parse_sess, Some(self.tcx.features())) {
                 return;
             }
         }

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

@@ -472,7 +472,7 @@ fn check_clippy_lint_names(cx: &LateContext<'_>, name: Symbol, items: &[NestedMe
 
 fn check_lint_reason(cx: &LateContext<'_>, name: Symbol, items: &[NestedMetaItem], attr: &'_ Attribute) {
     // Check for the feature
-    if !cx.tcx.sess.features_untracked().lint_reasons {
+    if !cx.tcx.features().lint_reasons {
         return;
     }