rustc_session: Remove lint store from Session

compiler/rustc_interface/src/passes.rs

@@ -179,7 +179,7 @@ pub fn register_plugins<'a>(
     register_lints: impl Fn(&Session, &mut LintStore),
     mut krate: ast::Crate,
     crate_name: &str,
-) -> Result<(ast::Crate, Lrc<LintStore>)> {
+) -> Result<(ast::Crate, LintStore)> {
     krate = sess.time("attributes_injection", || {
         rustc_builtin_macros::cmdline_attrs::inject(
             krate,
@@ -230,9 +230,6 @@ pub fn register_plugins<'a>(
         }
     });
 
-    let lint_store = Lrc::new(lint_store);
-    sess.init_lint_store(lint_store.clone());
-
     Ok((krate, lint_store))
 }
 

compiler/rustc_interface/src/queries.rs

@@ -135,7 +135,7 @@ impl<'tcx> Queries<'tcx> {
             let krate = self.parse()?.take();
 
             let empty: &(dyn Fn(&Session, &mut LintStore) + Sync + Send) = &|_, _| {};
-            let result = passes::register_plugins(
+            let (krate, lint_store) = passes::register_plugins(
                 self.session(),
                 &*self.codegen_backend().metadata_loader(),
                 self.compiler.register_lints.as_deref().unwrap_or_else(|| empty),
@@ -150,7 +150,7 @@ impl<'tcx> Queries<'tcx> {
             // called, which happens within passes::register_plugins().
             self.dep_graph_future().ok();
 
-            Ok(result)
+            Ok((krate, Lrc::new(lint_store)))
         })
     }
 

compiler/rustc_lint/src/context.rs

@@ -38,7 +38,6 @@ use rustc_serialize::json::Json;
 use rustc_session::lint::{BuiltinLintDiagnostics, ExternDepSpec};
 use rustc_session::lint::{FutureIncompatibleInfo, Level, Lint, LintBuffer, LintId};
 use rustc_session::Session;
-use rustc_session::SessionLintStore;
 use rustc_span::lev_distance::find_best_match_for_name;
 use rustc_span::{symbol::Symbol, MultiSpan, Span, DUMMY_SP};
 use rustc_target::abi;
@@ -75,20 +74,6 @@ pub struct LintStore {
     lint_groups: FxHashMap<&'static str, LintGroup>,
 }
 
-impl SessionLintStore for LintStore {
-    fn name_to_lint(&self, lint_name: &str) -> LintId {
-        let lints = self
-            .find_lints(lint_name)
-            .unwrap_or_else(|_| panic!("Failed to find lint with name `{}`", lint_name));
-
-        if let &[lint] = lints.as_slice() {
-            return lint;
-        } else {
-            panic!("Found mutliple lints with name `{}`: {:?}", lint_name, lints);
-        }
-    }
-}
-
 /// The target of the `by_name` map, which accounts for renaming/deprecation.
 #[derive(Debug)]
 enum TargetLint {

compiler/rustc_session/src/session.rs

@@ -2,10 +2,9 @@ use crate::cgu_reuse_tracker::CguReuseTracker;
 use crate::code_stats::CodeStats;
 pub use crate::code_stats::{DataTypeKind, FieldInfo, SizeKind, VariantInfo};
 use crate::config::{self, CrateType, OutputType, SwitchWithOptPath};
-use crate::filesearch;
-use crate::lint::{self, LintId};
 use crate::parse::ParseSess;
 use crate::search_paths::{PathKind, SearchPath};
+use crate::{filesearch, lint};
 
 pub use rustc_ast::attr::MarkedAttrs;
 pub use rustc_ast::Attribute;
@@ -41,10 +40,6 @@ use std::str::FromStr;
 use std::sync::Arc;
 use std::time::Duration;
 
-pub trait SessionLintStore: sync::Send + sync::Sync {
-    fn name_to_lint(&self, lint_name: &str) -> LintId;
-}
-
 pub struct OptimizationFuel {
     /// If `-zfuel=crate=n` is specified, initially set to `n`, otherwise `0`.
     remaining: u64,
@@ -153,8 +148,6 @@ pub struct Session {
 
     features: OnceCell<rustc_feature::Features>,
 
-    lint_store: OnceCell<Lrc<dyn SessionLintStore>>,
-
     incr_comp_session: OneThread<RefCell<IncrCompSession>>,
     /// Used for incremental compilation tests. Will only be populated if
     /// `-Zquery-dep-graph` is specified.
@@ -591,13 +584,6 @@ impl Session {
         }
     }
 
-    pub fn init_lint_store(&self, lint_store: Lrc<dyn SessionLintStore>) {
-        self.lint_store
-            .set(lint_store)
-            .map_err(|_| ())
-            .expect("`lint_store` was initialized twice");
-    }
-
     /// Calculates the flavor of LTO to use for this compilation.
     pub fn lto(&self) -> config::Lto {
         // If our target has codegen requirements ignore the command line
@@ -1315,7 +1301,6 @@ pub fn build_session(
         crate_types: OnceCell::new(),
         stable_crate_id: OnceCell::new(),
         features: OnceCell::new(),
-        lint_store: OnceCell::new(),
         incr_comp_session: OneThread::new(RefCell::new(IncrCompSession::NotInitialized)),
         cgu_reuse_tracker,
         prof,