rust-lang · bors · May 5, 2022 · May 1, 2022 · May 1, 2022 · May 1, 2022
diff --git a/Cargo.lock b/Cargo.lock
@@ -4245,6 +4245,7 @@ dependencies = [
  "rustc_serialize",
  "rustc_session",
  "rustc_span",
+ "tracing",
 ]
 
 [[package]]

diff --git a/compiler/rustc_ast_pretty/src/lib.rs b/compiler/rustc_ast_pretty/src/lib.rs
@@ -1,4 +1,3 @@
-#![feature(bool_to_option)]
 #![feature(crate_visibility_modifier)]
 #![feature(box_patterns)]
 #![recursion_limit = "256"]

diff --git a/compiler/rustc_borrowck/src/lib.rs b/compiler/rustc_borrowck/src/lib.rs
@@ -1,7 +1,6 @@
 //! This query borrow-checks the MIR to (further) ensure it is not broken.
 
 #![allow(rustc::potential_query_instability)]
-#![feature(bool_to_option)]
 #![feature(box_patterns)]
 #![feature(crate_visibility_modifier)]
 #![feature(let_chains)]

diff --git a/compiler/rustc_builtin_macros/src/lib.rs b/compiler/rustc_builtin_macros/src/lib.rs
@@ -4,7 +4,6 @@
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")]
 #![feature(array_windows)]
 #![feature(box_patterns)]
-#![feature(bool_to_option)]
 #![feature(crate_visibility_modifier)]
 #![feature(decl_macro)]
 #![feature(is_sorted)]

diff --git a/compiler/rustc_codegen_llvm/src/lib.rs b/compiler/rustc_codegen_llvm/src/lib.rs
@@ -5,7 +5,6 @@
 //! This API is completely unstable and subject to change.
 
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")]
-#![feature(bool_to_option)]
 #![feature(crate_visibility_modifier)]
 #![feature(let_chains)]
 #![feature(let_else)]

diff --git a/compiler/rustc_codegen_ssa/src/lib.rs b/compiler/rustc_codegen_ssa/src/lib.rs
@@ -1,5 +1,4 @@
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")]
-#![feature(bool_to_option)]
 #![feature(box_patterns)]
 #![feature(try_blocks)]
 #![feature(let_else)]

diff --git a/compiler/rustc_const_eval/src/lib.rs b/compiler/rustc_const_eval/src/lib.rs
@@ -5,7 +5,6 @@ Rust MIR: a lowered representation of Rust.
 */
 
 #![feature(assert_matches)]
-#![feature(bool_to_option)]
 #![feature(box_patterns)]
 #![feature(control_flow_enum)]
 #![feature(crate_visibility_modifier)]

diff --git a/compiler/rustc_data_structures/src/lib.rs b/compiler/rustc_data_structures/src/lib.rs
@@ -10,7 +10,6 @@
 #![feature(array_windows)]
 #![feature(associated_type_bounds)]
 #![feature(auto_traits)]
-#![feature(bool_to_option)]
 #![feature(control_flow_enum)]
 #![feature(core_intrinsics)]
 #![feature(extend_one)]

diff --git a/compiler/rustc_infer/src/lib.rs b/compiler/rustc_infer/src/lib.rs
@@ -14,7 +14,6 @@
 
 #![allow(rustc::potential_query_instability)]
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")]
-#![feature(bool_to_option)]
 #![feature(box_patterns)]
 #![feature(control_flow_enum)]
 #![cfg_attr(bootstrap, feature(derive_default_enum))]

diff --git a/compiler/rustc_interface/src/lib.rs b/compiler/rustc_interface/src/lib.rs
@@ -1,4 +1,3 @@
-#![feature(bool_to_option)]
 #![feature(box_patterns)]
 #![feature(let_else)]
 #![feature(internal_output_capture)]

diff --git a/compiler/rustc_lint/src/lib.rs b/compiler/rustc_lint/src/lib.rs
@@ -28,7 +28,6 @@
 #![allow(rustc::potential_query_instability)]
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")]
 #![feature(array_windows)]
-#![feature(bool_to_option)]
 #![feature(box_patterns)]
 #![feature(control_flow_enum)]
 #![feature(crate_visibility_modifier)]

diff --git a/compiler/rustc_middle/src/lib.rs b/compiler/rustc_middle/src/lib.rs
@@ -27,7 +27,6 @@
 #![feature(array_windows)]
 #![feature(assert_matches)]
 #![feature(backtrace)]
-#![feature(bool_to_option)]
 #![feature(box_patterns)]
 #![feature(core_intrinsics)]
 #![cfg_attr(bootstrap, feature(derive_default_enum))]

diff --git a/compiler/rustc_mir_build/src/lib.rs b/compiler/rustc_mir_build/src/lib.rs
@@ -2,7 +2,6 @@
 //!
 //! This crate also contains the match exhaustiveness and usefulness checking.
 #![allow(rustc::potential_query_instability)]
-#![feature(bool_to_option)]
 #![feature(box_patterns)]
 #![feature(control_flow_enum)]
 #![feature(crate_visibility_modifier)]

diff --git a/compiler/rustc_mir_dataflow/src/lib.rs b/compiler/rustc_mir_dataflow/src/lib.rs
@@ -1,5 +1,4 @@
 #![feature(associated_type_defaults)]
-#![feature(bool_to_option)]
 #![feature(box_patterns)]
 #![feature(box_syntax)]
 #![feature(exact_size_is_empty)]

diff --git a/compiler/rustc_monomorphize/src/lib.rs b/compiler/rustc_monomorphize/src/lib.rs
@@ -1,5 +1,4 @@
 #![feature(array_windows)]
-#![feature(bool_to_option)]
 #![feature(crate_visibility_modifier)]
 #![feature(control_flow_enum)]
 #![feature(let_else)]

diff --git a/compiler/rustc_query_impl/Cargo.toml b/compiler/rustc_query_impl/Cargo.toml
@@ -20,6 +20,7 @@ rustc_query_system = { path = "../rustc_query_system" }
 rustc_serialize = { path = "../rustc_serialize" }
 rustc_session = { path = "../rustc_session" }
 rustc_span = { path = "../rustc_span" }
+tracing = "0.1"
 
 [features]
 rustc_use_parallel_compiler = ["rustc-rayon-core", "rustc_query_system/rustc_use_parallel_compiler"]
diff --git a/compiler/rustc_query_impl/src/plumbing.rs b/compiler/rustc_query_impl/src/plumbing.rs
@@ -435,6 +435,8 @@ macro_rules! define_queries {
 
                 fn force_from_dep_node(tcx: TyCtxt<'_>, dep_node: DepNode) -> bool {
                     if let Some(key) = recover(tcx, dep_node) {
+                        #[cfg(debug_assertions)]
+                        let _guard = tracing::span!(tracing::Level::TRACE, stringify!($name), ?key).entered();
                         let tcx = QueryCtxt::from_tcx(tcx);
                         force_query::<queries::$name<'_>, _>(tcx, key, dep_node);
                         true
@@ -532,6 +534,7 @@ macro_rules! define_queries_struct {
 
             $($(#[$attr])*
             #[inline(always)]
+            #[tracing::instrument(level = "trace", skip(self, tcx))]
             fn $name(
                 &'tcx self,
                 tcx: TyCtxt<$tcx>,

diff --git a/compiler/rustc_query_system/src/lib.rs b/compiler/rustc_query_system/src/lib.rs
@@ -1,5 +1,4 @@
 #![feature(assert_matches)]
-#![feature(bool_to_option)]
 #![feature(core_intrinsics)]
 #![feature(hash_raw_entry)]
 #![feature(let_else)]

diff --git a/compiler/rustc_query_system/src/query/plumbing.rs b/compiler/rustc_query_system/src/query/plumbing.rs
@@ -675,6 +675,7 @@ where
     }
 }
 
+#[derive(Debug)]
 pub enum QueryMode {
     Get,
     Ensure,
@@ -697,7 +698,6 @@ where
         None
     };
 
-    debug!("ty::query::get_query<{}>(key={:?}, span={:?})", Q::NAME, key, span);
     let (result, dep_node_index) = try_execute_query(
         tcx,
         Q::query_state(tcx),

diff --git a/compiler/rustc_resolve/src/lib.rs b/compiler/rustc_resolve/src/lib.rs
@@ -9,7 +9,6 @@
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")]
 #![feature(box_patterns)]
 #![feature(drain_filter)]
-#![feature(bool_to_option)]
 #![feature(crate_visibility_modifier)]
 #![feature(if_let_guard)]
 #![feature(let_chains)]

diff --git a/compiler/rustc_span/src/lib.rs b/compiler/rustc_span/src/lib.rs
@@ -15,7 +15,6 @@
 
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")]
 #![feature(array_windows)]
-#![feature(bool_to_option)]
 #![feature(crate_visibility_modifier)]
 #![feature(let_else)]
 #![feature(if_let_guard)]

diff --git a/compiler/rustc_target/src/lib.rs b/compiler/rustc_target/src/lib.rs
@@ -9,7 +9,6 @@
 
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")]
 #![feature(associated_type_bounds)]
-#![feature(bool_to_option)]
 #![feature(exhaustive_patterns)]
 #![feature(let_else)]
 #![feature(min_specialization)]

diff --git a/compiler/rustc_trait_selection/src/lib.rs b/compiler/rustc_trait_selection/src/lib.rs
@@ -12,7 +12,6 @@
 
 #![allow(rustc::potential_query_instability)]
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")]
-#![feature(bool_to_option)]
 #![feature(box_patterns)]
 #![feature(control_flow_enum)]
 #![feature(crate_visibility_modifier)]

diff --git a/compiler/rustc_typeck/src/lib.rs b/compiler/rustc_typeck/src/lib.rs
@@ -57,7 +57,6 @@ This API is completely unstable and subject to change.
 
 #![allow(rustc::potential_query_instability)]
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")]
-#![feature(bool_to_option)]
 #![feature(box_patterns)]
 #![feature(control_flow_enum)]
 #![feature(crate_visibility_modifier)]

diff --git a/library/core/src/bool.rs b/library/core/src/bool.rs
@@ -9,12 +9,10 @@ impl bool {
     /// # Examples
     ///
     /// ```
-    /// #![feature(bool_to_option)]
-    ///
     /// assert_eq!(false.then_some(0), None);
     /// assert_eq!(true.then_some(0), Some(0));
     /// ```
-    #[unstable(feature = "bool_to_option", issue = "80967")]
+    #[stable(feature = "bool_to_option", since = "1.62.0")]
     #[rustc_const_unstable(feature = "const_bool_to_option", issue = "91917")]
     #[inline]
     pub const fn then_some<T>(self, t: T) -> Option<T>

diff --git a/library/core/tests/lib.rs b/library/core/tests/lib.rs
@@ -3,7 +3,6 @@
 #![feature(array_methods)]
 #![feature(array_windows)]
 #![feature(bench_black_box)]
-#![feature(bool_to_option)]
 #![feature(box_syntax)]
 #![feature(cell_update)]
 #![feature(const_assume)]

diff --git a/library/std/src/sys_common/condvar/check.rs b/library/std/src/sys_common/condvar/check.rs
@@ -24,8 +24,14 @@ impl SameMutexCheck {
     }
     pub fn verify(&self, mutex: &MovableMutex) {
         let addr = mutex.raw() as *const imp::Mutex as *const () as *mut _;
-        match self.addr.compare_exchange(ptr::null_mut(), addr, Ordering::SeqCst, Ordering::SeqCst)
-        {
+        // Relaxed is okay here because we never read through `self.addr`, and only use it to
+        // compare addresses.
+        match self.addr.compare_exchange(
+            ptr::null_mut(),
+            addr,
+            Ordering::Relaxed,
+            Ordering::Relaxed,
+        ) {
             Ok(_) => {}               // Stored the address
             Err(n) if n == addr => {} // Lost a race to store the same address
             _ => panic!("attempted to use a condition variable with two mutexes"),

diff --git a/library/std/src/sys_common/thread.rs b/library/std/src/sys_common/thread.rs
@@ -4,7 +4,7 @@ use crate::sys::thread as imp;
 
 pub fn min_stack() -> usize {
     static MIN: atomic::AtomicUsize = atomic::AtomicUsize::new(0);
-    match MIN.load(Ordering::SeqCst) {
+    match MIN.load(Ordering::Relaxed) {
         0 => {}
         n => return n - 1,
     }
@@ -13,6 +13,6 @@ pub fn min_stack() -> usize {
 
     // 0 is our sentinel value, so ensure that we'll never see 0 after
     // initialization has run
-    MIN.store(amt + 1, Ordering::SeqCst);
+    MIN.store(amt + 1, Ordering::Relaxed);
     amt
 }