2 files changed, 12 insertions, 6 deletions
diff --git a/compiler/rustc_middle/src/dep_graph/mod.rs b/compiler/rustc_middle/src/dep_graph/mod.rs
index 79d7ca32f35..cf50378ad60 100644
--- a/compiler/rustc_middle/src/dep_graph/mod.rs
+++ b/compiler/rustc_middle/src/dep_graph/mod.rs
@@ -1,6 +1,5 @@
 use crate::ty::{self, TyCtxt};
 use rustc_data_structures::profiling::SelfProfilerRef;
-use rustc_data_structures::sync::Lock;
 use rustc_query_system::ich::StableHashingContext;
 use rustc_session::Session;
 
@@ -17,6 +16,7 @@ crate use dep_node::{make_compile_codegen_unit, make_compile_mono_item};
 
 pub type DepGraph = rustc_query_system::dep_graph::DepGraph<DepKind>;
 pub type TaskDeps = rustc_query_system::dep_graph::TaskDeps<DepKind>;
+pub type TaskDepsRef<'a> = rustc_query_system::dep_graph::TaskDepsRef<'a, DepKind>;
 pub type DepGraphQuery = rustc_query_system::dep_graph::DepGraphQuery<DepKind>;
 pub type SerializedDepGraph = rustc_query_system::dep_graph::SerializedDepGraph<DepKind>;
 pub type EdgeFilter = rustc_query_system::dep_graph::debug::EdgeFilter<DepKind>;
@@ -45,7 +45,7 @@ impl rustc_query_system::dep_graph::DepKind for DepKind {
         write!(f, ")")
     }
 
-    fn with_deps<OP, R>(task_deps: Option<&Lock<TaskDeps>>, op: OP) -> R
+    fn with_deps<OP, R>(task_deps: TaskDepsRef<'_>, op: OP) -> R
     where
         OP: FnOnce() -> R,
     {
@@ -58,7 +58,7 @@ impl rustc_query_system::dep_graph::DepKind for DepKind {
 
     fn read_deps<OP>(op: OP)
     where
-        OP: for<'a> FnOnce(Option<&'a Lock<TaskDeps>>),
+        OP: for<'a> FnOnce(TaskDepsRef<'a>),
     {
         ty::tls::with_context_opt(|icx| {
             let icx = if let Some(icx) = icx { icx } else { return };
diff --git a/compiler/rustc_middle/src/ty/context.rs b/compiler/rustc_middle/src/ty/context.rs
index 0c4e3becabe..ecc6da6da12 100644
--- a/compiler/rustc_middle/src/ty/context.rs
+++ b/compiler/rustc_middle/src/ty/context.rs
@@ -1661,7 +1661,7 @@ CloneLiftImpls! { for<'tcx> { Constness, traits::WellFormedLoc, } }
 pub mod tls {
     use super::{ptr_eq, GlobalCtxt, TyCtxt};
 
-    use crate::dep_graph::{DepKind, TaskDeps};
+    use crate::dep_graph::{DepKind, TaskDepsRef};
     use crate::ty::query;
     use rustc_data_structures::sync::{self, Lock};
     use rustc_data_structures::thin_vec::ThinVec;
@@ -1697,13 +1697,19 @@ pub mod tls {
 
         /// The current dep graph task. This is used to add dependencies to queries
         /// when executing them.
-        pub task_deps: Option<&'a Lock<TaskDeps>>,
+        pub task_deps: TaskDepsRef<'a>,
     }
 
     impl<'a, 'tcx> ImplicitCtxt<'a, 'tcx> {
         pub fn new(gcx: &'tcx GlobalCtxt<'tcx>) -> Self {
             let tcx = TyCtxt { gcx };
-            ImplicitCtxt { tcx, query: None, diagnostics: None, layout_depth: 0, task_deps: None }
+            ImplicitCtxt {
+                tcx,
+                query: None,
+                diagnostics: None,
+                layout_depth: 0,
+                task_deps: TaskDepsRef::Ignore,
+            }
         }
     }