5 files changed, 19 insertions, 7 deletions
diff --git a/compiler/rustc_data_structures/src/lib.rs b/compiler/rustc_data_structures/src/lib.rs
index b360a1b7bb8..8dd85b25e0e 100644
--- a/compiler/rustc_data_structures/src/lib.rs
+++ b/compiler/rustc_data_structures/src/lib.rs
@@ -22,12 +22,12 @@
 #![feature(cfg_match)]
 #![feature(core_intrinsics)]
 #![feature(extend_one)]
-#![feature(generic_nonzero)]
 #![feature(hash_raw_entry)]
 #![feature(hasher_prefixfree_extras)]
 #![feature(lazy_cell)]
 #![feature(lint_reasons)]
 #![feature(macro_metavar_expr)]
+#![feature(map_try_insert)]
 #![feature(maybe_uninit_uninit_array)]
 #![feature(min_specialization)]
 #![feature(negative_impls)]
@@ -44,8 +44,6 @@
 
 #[macro_use]
 extern crate tracing;
-#[macro_use]
-extern crate rustc_macros;
 
 use std::fmt;
 
@@ -149,9 +147,9 @@ pub fn make_display(f: impl Fn(&mut fmt::Formatter<'_>) -> fmt::Result) -> impl
     Printer { f }
 }
 
-// See comments in compiler/rustc_middle/src/tests.rs
+// See comment in compiler/rustc_middle/src/tests.rs and issue #27438.
 #[doc(hidden)]
-pub fn __noop_fix_for_27438() {}
+pub fn __noop_fix_for_windows_dllimport_issue() {}
 
 #[macro_export]
 macro_rules! external_bitflags_debug {
diff --git a/compiler/rustc_data_structures/src/sorted_map.rs b/compiler/rustc_data_structures/src/sorted_map.rs
index 1436628139f..21d7c91ec48 100644
--- a/compiler/rustc_data_structures/src/sorted_map.rs
+++ b/compiler/rustc_data_structures/src/sorted_map.rs
@@ -1,4 +1,5 @@
 use crate::stable_hasher::{HashStable, StableHasher, StableOrd};
+use rustc_macros::{Decodable_Generic, Encodable_Generic};
 use std::borrow::Borrow;
 use std::fmt::Debug;
 use std::mem;
diff --git a/compiler/rustc_data_structures/src/svh.rs b/compiler/rustc_data_structures/src/svh.rs
index 1cfc9fecd47..38629ea9801 100644
--- a/compiler/rustc_data_structures/src/svh.rs
+++ b/compiler/rustc_data_structures/src/svh.rs
@@ -6,9 +6,9 @@
 //! compiled from distinct sources.
 
 use crate::fingerprint::Fingerprint;
-use std::fmt;
-
 use crate::stable_hasher;
+use rustc_macros::{Decodable_Generic, Encodable_Generic};
+use std::fmt;
 
 #[derive(Copy, Clone, PartialEq, Eq, Debug, Encodable_Generic, Decodable_Generic, Hash)]
 pub struct Svh {
diff --git a/compiler/rustc_data_structures/src/sync.rs b/compiler/rustc_data_structures/src/sync.rs
index eab6d8168ca..ecb85db33f7 100644
--- a/compiler/rustc_data_structures/src/sync.rs
+++ b/compiler/rustc_data_structures/src/sync.rs
@@ -46,6 +46,7 @@ use std::collections::HashMap;
 use std::hash::{BuildHasher, Hash};
 
 mod lock;
+#[doc(no_inline)]
 pub use lock::{Lock, LockGuard, Mode};
 
 mod worker_local;
@@ -199,10 +200,15 @@ cfg_match! {
 
         pub use std::rc::Rc as Lrc;
         pub use std::rc::Weak as Weak;
+        #[doc(no_inline)]
         pub use std::cell::Ref as ReadGuard;
+        #[doc(no_inline)]
         pub use std::cell::Ref as MappedReadGuard;
+        #[doc(no_inline)]
         pub use std::cell::RefMut as WriteGuard;
+        #[doc(no_inline)]
         pub use std::cell::RefMut as MappedWriteGuard;
+        #[doc(no_inline)]
         pub use std::cell::RefMut as MappedLockGuard;
 
         pub use std::cell::OnceCell as OnceLock;
diff --git a/compiler/rustc_data_structures/src/unord.rs b/compiler/rustc_data_structures/src/unord.rs
index a99e2062039..1ccd22a56c9 100644
--- a/compiler/rustc_data_structures/src/unord.rs
+++ b/compiler/rustc_data_structures/src/unord.rs
@@ -3,6 +3,8 @@
 //! as required by the query system.
 
 use rustc_hash::{FxHashMap, FxHashSet};
+use rustc_macros::{Decodable_Generic, Encodable_Generic};
+use std::collections::hash_map::OccupiedError;
 use std::{
     borrow::{Borrow, BorrowMut},
     collections::hash_map::Entry,
@@ -469,6 +471,11 @@ impl<K: Eq + Hash, V> UnordMap<K, V> {
     }
 
     #[inline]
+    pub fn try_insert(&mut self, k: K, v: V) -> Result<&mut V, OccupiedError<'_, K, V>> {
+        self.inner.try_insert(k, v)
+    }
+
+    #[inline]
     pub fn contains_key<Q: ?Sized>(&self, k: &Q) -> bool
     where
         K: Borrow<Q>,