309 files changed, 1827 insertions, 2833 deletions

diff --git a/Cargo.lock b/Cargo.lock
index 55ed17ac256..adaac69af57 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2203,9 +2203,9 @@ checksum = "db13adb97ab515a3691f56e4dbab09283d0b86cb45abd991d8634a9d6f501760"
 
 [[package]]
 name = "libc"
-version = "0.2.149"
+version = "0.2.150"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a08173bc88b7955d1b3145aa561539096c421ac8debde8cbc3612ec635fee29b"
+checksum = "89d92a4743f9a61002fae18374ed11e7973f530cb3a3255fb354818118b2203c"
 dependencies = [
  "rustc-std-workspace-core",
 ]
diff --git a/compiler/rustc_codegen_llvm/messages.ftl b/compiler/rustc_codegen_llvm/messages.ftl
index c0cfe39f1e0..7a86ddc7556 100644
--- a/compiler/rustc_codegen_llvm/messages.ftl
+++ b/compiler/rustc_codegen_llvm/messages.ftl
@@ -76,8 +76,8 @@ codegen_llvm_target_machine = could not create LLVM TargetMachine for triple: {$
 codegen_llvm_target_machine_with_llvm_err = could not create LLVM TargetMachine for triple: {$triple}: {$llvm_err}
 
 codegen_llvm_unknown_ctarget_feature =
-    unknown feature specified for `-Ctarget-feature`: `{$feature}`
-    .note = it is still passed through to the codegen backend
+    unknown and unstable feature specified for `-Ctarget-feature`: `{$feature}`
+    .note = it is still passed through to the codegen backend, but use of this feature might be unsound and the behavior of this feature can change in the future
     .possible_feature = you might have meant: `{$rust_feature}`
     .consider_filing_feature_request = consider filing a feature request
 
@@ -87,6 +87,10 @@ codegen_llvm_unknown_ctarget_feature_prefix =
 
 codegen_llvm_unknown_debuginfo_compression = unknown debuginfo compression algorithm {$algorithm} - will fall back to uncompressed debuginfo
 
+codegen_llvm_unstable_ctarget_feature =
+    unstable feature specified for `-Ctarget-feature`: `{$feature}`
+    .note = this feature is not stably supported; its behavior can change in the future
+
 codegen_llvm_write_bytecode = failed to write bytecode to {$path}: {$err}
 
 codegen_llvm_write_ir = failed to write LLVM IR to {$path}
diff --git a/compiler/rustc_codegen_llvm/src/errors.rs b/compiler/rustc_codegen_llvm/src/errors.rs
index 665d195790c..10ca5ad802a 100644
--- a/compiler/rustc_codegen_llvm/src/errors.rs
+++ b/compiler/rustc_codegen_llvm/src/errors.rs
@@ -26,6 +26,13 @@ pub(crate) struct UnknownCTargetFeature<'a> {
     pub rust_feature: PossibleFeature<'a>,
 }
 
+#[derive(Diagnostic)]
+#[diag(codegen_llvm_unstable_ctarget_feature)]
+#[note]
+pub(crate) struct UnstableCTargetFeature<'a> {
+    pub feature: &'a str,
+}
+
 #[derive(Subdiagnostic)]
 pub(crate) enum PossibleFeature<'a> {
     #[help(codegen_llvm_possible_feature)]
diff --git a/compiler/rustc_codegen_llvm/src/llvm_util.rs b/compiler/rustc_codegen_llvm/src/llvm_util.rs
index 7c8ef67ffd1..cc4ccaf19c2 100644
--- a/compiler/rustc_codegen_llvm/src/llvm_util.rs
+++ b/compiler/rustc_codegen_llvm/src/llvm_util.rs
@@ -1,7 +1,7 @@
 use crate::back::write::create_informational_target_machine;
 use crate::errors::{
     PossibleFeature, TargetFeatureDisableOrEnable, UnknownCTargetFeature,
-    UnknownCTargetFeaturePrefix,
+    UnknownCTargetFeaturePrefix, UnstableCTargetFeature,
 };
 use crate::llvm;
 use libc::c_int;
@@ -531,25 +531,34 @@ pub(crate) fn global_llvm_features(sess: &Session, diagnostics: bool) -> Vec<Str
             };
 
             let feature = backend_feature_name(s)?;
-            // Warn against use of LLVM specific feature names on the CLI.
-            if diagnostics && !supported_features.iter().any(|&(v, _)| v == feature) {
-                let rust_feature = supported_features.iter().find_map(|&(rust_feature, _)| {
-                    let llvm_features = to_llvm_features(sess, rust_feature);
-                    if llvm_features.contains(&feature) && !llvm_features.contains(&rust_feature) {
-                        Some(rust_feature)
+            // Warn against use of LLVM specific feature names and unstable features on the CLI.
+            if diagnostics {
+                let feature_state = supported_features.iter().find(|&&(v, _)| v == feature);
+                if feature_state.is_none() {
+                    let rust_feature = supported_features.iter().find_map(|&(rust_feature, _)| {
+                        let llvm_features = to_llvm_features(sess, rust_feature);
+                        if llvm_features.contains(&feature)
+                            && !llvm_features.contains(&rust_feature)
+                        {
+                            Some(rust_feature)
+                        } else {
+                            None
+                        }
+                    });
+                    let unknown_feature = if let Some(rust_feature) = rust_feature {
+                        UnknownCTargetFeature {
+                            feature,
+                            rust_feature: PossibleFeature::Some { rust_feature },
+                        }
                     } else {
-                        None
-                    }
-                });
-                let unknown_feature = if let Some(rust_feature) = rust_feature {
-                    UnknownCTargetFeature {
-                        feature,
-                        rust_feature: PossibleFeature::Some { rust_feature },
-                    }
-                } else {
-                    UnknownCTargetFeature { feature, rust_feature: PossibleFeature::None }
-                };
-                sess.emit_warning(unknown_feature);
+                        UnknownCTargetFeature { feature, rust_feature: PossibleFeature::None }
+                    };
+                    sess.emit_warning(unknown_feature);
+                } else if feature_state.is_some_and(|(_name, feature_gate)| feature_gate.is_some())
+                {
+                    // An unstable feature. Warn about using it.
+                    sess.emit_warning(UnstableCTargetFeature { feature });
+                }
             }
 
             if diagnostics {
diff --git a/compiler/rustc_codegen_ssa/src/target_features.rs b/compiler/rustc_codegen_ssa/src/target_features.rs
index 9c053338c85..2936f1de3cb 100644
--- a/compiler/rustc_codegen_ssa/src/target_features.rs
+++ b/compiler/rustc_codegen_ssa/src/target_features.rs
@@ -23,6 +23,15 @@ pub const RUSTC_SPECIFIC_FEATURES: &[&str] = &["crt-static"];
 // check whether they're named already elsewhere in rust
 // e.g. in stdarch and whether the given name matches LLVM's
 // if it doesn't, to_llvm_feature in llvm_util in rustc_codegen_llvm needs to be adapted
+//
+// When adding a new feature, be particularly mindful of features that affect function ABIs. Those
+// need to be treated very carefully to avoid introducing unsoundness! This often affects features
+// that enable/disable hardfloat support (see https://github.com/rust-lang/rust/issues/116344 for an
+// example of this going wrong), but features enabling new SIMD registers are also a concern (see
+// https://github.com/rust-lang/rust/issues/116558 for an example of this going wrong).
+//
+// Stabilizing a target feature (setting the 2nd component of the pair to `None`) requires t-lang
+// approval.
 
 const ARM_ALLOWED_FEATURES: &[(&str, Option<Symbol>)] = &[
     // tidy-alphabetical-start
diff --git a/compiler/rustc_errors/src/emitter.rs b/compiler/rustc_errors/src/emitter.rs
index 6d95fbcfad0..68dba860291 100644
--- a/compiler/rustc_errors/src/emitter.rs
+++ b/compiler/rustc_errors/src/emitter.rs
@@ -2362,11 +2362,7 @@ impl FileWithAnnotatedLines {
 
                 let label = label.as_ref().map(|m| {
                     normalize_whitespace(
-                        &emitter
-                            .translate_message(m, &args)
-                            .map_err(Report::new)
-                            .unwrap()
-                            .to_string(),
+                        &emitter.translate_message(m, &args).map_err(Report::new).unwrap(),
                     )
                 });
 
diff --git a/compiler/rustc_hir/src/hir.rs b/compiler/rustc_hir/src/hir.rs
index d88f165b9e5..c4e44a6a4e3 100644
--- a/compiler/rustc_hir/src/hir.rs
+++ b/compiler/rustc_hir/src/hir.rs
@@ -3566,6 +3566,15 @@ impl<'hir> OwnerNode<'hir> {
         }
     }
 
+    pub fn fn_sig(self) -> Option<&'hir FnSig<'hir>> {
+        match self {
+            OwnerNode::TraitItem(TraitItem { kind: TraitItemKind::Fn(fn_sig, _), .. })
+            | OwnerNode::ImplItem(ImplItem { kind: ImplItemKind::Fn(fn_sig, _), .. })
+            | OwnerNode::Item(Item { kind: ItemKind::Fn(fn_sig, _, _), .. }) => Some(fn_sig),
+            _ => None,
+        }
+    }
+
     pub fn fn_decl(self) -> Option<&'hir FnDecl<'hir>> {
         match self {
             OwnerNode::TraitItem(TraitItem { kind: TraitItemKind::Fn(fn_sig, _), .. })
diff --git a/compiler/rustc_hir_typeck/src/expr.rs b/compiler/rustc_hir_typeck/src/expr.rs
index bb21b027cc9..9f439a2b32a 100644
--- a/compiler/rustc_hir_typeck/src/expr.rs
+++ b/compiler/rustc_hir_typeck/src/expr.rs
@@ -13,7 +13,7 @@ use crate::errors::{
     YieldExprOutsideOfCoroutine,
 };
 use crate::fatally_break_rust;
-use crate::method::{MethodCallComponents, SelfSource};
+use crate::method::SelfSource;
 use crate::type_error_struct;
 use crate::Expectation::{self, ExpectCastableToType, ExpectHasType, NoExpectation};
 use crate::{
@@ -512,7 +512,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
     ) -> Ty<'tcx> {
         let tcx = self.tcx;
         let (res, opt_ty, segs) =
-            self.resolve_ty_and_res_fully_qualified_call(qpath, expr.hir_id, expr.span);
+            self.resolve_ty_and_res_fully_qualified_call(qpath, expr.hir_id, expr.span, Some(args));
         let ty = match res {
             Res::Err => {
                 self.suggest_assoc_method_call(segs);
@@ -1332,7 +1332,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                         segment.ident,
                         SelfSource::MethodCall(rcvr),
                         error,
-                        Some(MethodCallComponents { receiver: rcvr, args, full_expr: expr }),
+                        Some(args),
                         expected,
                         false,
                     ) {
@@ -1551,21 +1551,42 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
             }
             _ => {}
         }
-        // If someone calls a const fn, they can extract that call out into a separate constant (or a const
-        // block in the future), so we check that to tell them that in the diagnostic. Does not affect typeck.
-        let is_const_fn = match element.kind {
+        // If someone calls a const fn or constructs a const value, they can extract that
+        // out into a separate constant (or a const block in the future), so we check that
+        // to tell them that in the diagnostic. Does not affect typeck.
+        let is_constable = match element.kind {
             hir::ExprKind::Call(func, _args) => match *self.node_ty(func.hir_id).kind() {
-                ty::FnDef(def_id, _) => tcx.is_const_fn(def_id),
-                _ => false,
+                ty::FnDef(def_id, _) if tcx.is_const_fn(def_id) => traits::IsConstable::Fn,
+                _ => traits::IsConstable::No,
             },
-            _ => false,
+            hir::ExprKind::Path(qpath) => {
+                match self.typeck_results.borrow().qpath_res(&qpath, element.hir_id) {
+                    Res::Def(DefKind::Ctor(_, CtorKind::Const), _) => traits::IsConstable::Ctor,
+                    _ => traits::IsConstable::No,
+                }
+            }
+            _ => traits::IsConstable::No,
         };
 
         // If the length is 0, we don't create any elements, so we don't copy any. If the length is 1, we
         // don't copy that one element, we move it. Only check for Copy if the length is larger.
         if count.try_eval_target_usize(tcx, self.param_env).map_or(true, |len| len > 1) {
             let lang_item = self.tcx.require_lang_item(LangItem::Copy, None);
-            let code = traits::ObligationCauseCode::RepeatElementCopy { is_const_fn };
+            let code = traits::ObligationCauseCode::RepeatElementCopy {
+                is_constable,
+                elt_type: element_ty,
+                elt_span: element.span,
+                elt_stmt_span: self
+                    .tcx
+                    .hir()
+                    .parent_iter(element.hir_id)
+                    .find_map(|(_, node)| match node {
+                        hir::Node::Item(it) => Some(it.span),
+                        hir::Node::Stmt(stmt) => Some(stmt.span),
+                        _ => None,
+                    })
+                    .expect("array repeat expressions must be inside an item or statement"),
+            };
             self.require_type_meets(element_ty, element.span, code, lang_item);
         }
     }
diff --git a/compiler/rustc_hir_typeck/src/fn_ctxt/_impl.rs b/compiler/rustc_hir_typeck/src/fn_ctxt/_impl.rs
index b5a07f0d3e9..750ed2c3491 100644
--- a/compiler/rustc_hir_typeck/src/fn_ctxt/_impl.rs
+++ b/compiler/rustc_hir_typeck/src/fn_ctxt/_impl.rs
@@ -797,6 +797,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         qpath: &'tcx QPath<'tcx>,
         hir_id: hir::HirId,
         span: Span,
+        args: Option<&'tcx [hir::Expr<'tcx>]>,
     ) -> (Res, Option<RawTy<'tcx>>, &'tcx [hir::PathSegment<'tcx>]) {
         debug!(
             "resolve_ty_and_res_fully_qualified_call: qpath={:?} hir_id={:?} span={:?}",
@@ -898,7 +899,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                         item_name,
                         SelfSource::QPath(qself),
                         error,
-                        None,
+                        args,
                         Expectation::NoExpectation,
                         trait_missing_method && span.edition().at_least_rust_2021(), // emits missing method for trait only after edition 2021
                     ) {
diff --git a/compiler/rustc_hir_typeck/src/method/mod.rs b/compiler/rustc_hir_typeck/src/method/mod.rs
index 86a0e95de1d..d69d2529b18 100644
--- a/compiler/rustc_hir_typeck/src/method/mod.rs
+++ b/compiler/rustc_hir_typeck/src/method/mod.rs
@@ -7,7 +7,7 @@ mod prelude2021;
 pub mod probe;
 mod suggest;
 
-pub use self::suggest::{MethodCallComponents, SelfSource};
+pub use self::suggest::SelfSource;
 pub use self::MethodError::*;
 
 use crate::errors::OpMethodGenericParams;
diff --git a/compiler/rustc_hir_typeck/src/method/suggest.rs b/compiler/rustc_hir_typeck/src/method/suggest.rs
index 87dfcf09cdd..b1a2df8ace4 100644
--- a/compiler/rustc_hir_typeck/src/method/suggest.rs
+++ b/compiler/rustc_hir_typeck/src/method/suggest.rs
@@ -34,7 +34,7 @@ use rustc_middle::ty::{self, GenericArgKind, Ty, TyCtxt, TypeVisitableExt};
 use rustc_span::def_id::DefIdSet;
 use rustc_span::symbol::{kw, sym, Ident};
 use rustc_span::Symbol;
-use rustc_span::{edit_distance, source_map, ExpnKind, FileName, MacroKind, Span};
+use rustc_span::{edit_distance, ExpnKind, FileName, MacroKind, Span};
 use rustc_trait_selection::infer::InferCtxtExt;
 use rustc_trait_selection::traits::error_reporting::on_unimplemented::OnUnimplementedNote;
 use rustc_trait_selection::traits::error_reporting::on_unimplemented::TypeErrCtxtExt as _;
@@ -50,15 +50,6 @@ use rustc_hir::intravisit::Visitor;
 use std::cmp::{self, Ordering};
 use std::iter;
 
-/// After identifying that `full_expr` is a method call, we use this type to keep the expression's
-/// components readily available to us to point at the right place in diagnostics.
-#[derive(Debug, Clone, Copy)]
-pub struct MethodCallComponents<'tcx> {
-    pub receiver: &'tcx hir::Expr<'tcx>,
-    pub args: &'tcx [hir::Expr<'tcx>],
-    pub full_expr: &'tcx hir::Expr<'tcx>,
-}
-
 impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
     fn is_fn_ty(&self, ty: Ty<'tcx>, span: Span) -> bool {
         let tcx = self.tcx;
@@ -124,7 +115,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         item_name: Ident,
         source: SelfSource<'tcx>,
         error: MethodError<'tcx>,
-        args: Option<MethodCallComponents<'tcx>>,
+        args: Option<&'tcx [hir::Expr<'tcx>]>,
         expected: Expectation<'tcx>,
         trait_missing_method: bool,
     ) -> Option<DiagnosticBuilder<'_, ErrorGuaranteed>> {
@@ -167,6 +158,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                 self.note_candidates_on_method_error(
                     rcvr_ty,
                     item_name,
+                    source,
                     args,
                     span,
                     &mut err,
@@ -266,23 +258,23 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
     fn suggest_missing_writer(
         &self,
         rcvr_ty: Ty<'tcx>,
-        args: MethodCallComponents<'tcx>,
+        rcvr_expr: &hir::Expr<'tcx>,
     ) -> DiagnosticBuilder<'_, ErrorGuaranteed> {
         let (ty_str, _ty_file) = self.tcx.short_ty_string(rcvr_ty);
         let mut err = struct_span_err!(
             self.tcx.sess,
-            args.receiver.span,
+            rcvr_expr.span,
             E0599,
             "cannot write into `{}`",
             ty_str
         );
         err.span_note(
-            args.receiver.span,
+            rcvr_expr.span,
             "must implement `io::Write`, `fmt::Write`, or have a `write_fmt` method",
         );
-        if let ExprKind::Lit(_) = args.receiver.kind {
+        if let ExprKind::Lit(_) = rcvr_expr.kind {
             err.span_help(
-                args.receiver.span.shrink_to_lo(),
+                rcvr_expr.span.shrink_to_lo(),
                 "a writer is needed before this format string",
             );
         };
@@ -296,7 +288,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         rcvr_ty: Ty<'tcx>,
         item_name: Ident,
         source: SelfSource<'tcx>,
-        args: Option<MethodCallComponents<'tcx>>,
+        args: Option<&'tcx [hir::Expr<'tcx>]>,
         sugg_span: Span,
         no_match_data: &mut NoMatchData<'tcx>,
         expected: Expectation<'tcx>,
@@ -377,23 +369,25 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
             tcx.is_diagnostic_item(sym::write_macro, def_id)
                 || tcx.is_diagnostic_item(sym::writeln_macro, def_id)
         }) && item_name.name == Symbol::intern("write_fmt");
-        let mut err = if is_write && let Some(args) = args {
-            self.suggest_missing_writer(rcvr_ty, args)
-        } else {
-            tcx.sess.create_err(NoAssociatedItem {
-                span,
-                item_kind,
-                item_name,
-                ty_prefix: if trait_missing_method {
-                    // FIXME(mu001999) E0599 maybe not suitable here because it is for types
-                    Cow::from("trait")
-                } else {
-                    rcvr_ty.prefix_string(self.tcx)
-                },
-                ty_str: ty_str_reported,
-                trait_missing_method,
-            })
-        };
+        let mut err =
+            if is_write && let SelfSource::MethodCall(rcvr_expr) = source
+            {
+                self.suggest_missing_writer(rcvr_ty, rcvr_expr)
+            } else {
+                tcx.sess.create_err(NoAssociatedItem {
+                    span,
+                    item_kind,
+                    item_name,
+                    ty_prefix: if trait_missing_method {
+                        // FIXME(mu001999) E0599 maybe not suitable here because it is for types
+                        Cow::from("trait")
+                    } else {
+                        rcvr_ty.prefix_string(self.tcx)
+                    },
+                    ty_str: ty_str_reported,
+                    trait_missing_method,
+                })
+            };
         if tcx.sess.source_map().is_multiline(sugg_span) {
             err.span_label(sugg_span.with_hi(span.lo()), "");
         }
@@ -409,7 +403,10 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
             err.downgrade_to_delayed_bug();
         }
 
-        self.find_builder_fn(&mut err, rcvr_ty, source);
+        if matches!(source, SelfSource::QPath(_)) && args.is_some() {
+            self.find_builder_fn(&mut err, rcvr_ty);
+        }
+
         if tcx.ty_is_opaque_future(rcvr_ty) && item_name.name == sym::poll {
             err.help(format!(
                 "method `poll` found on `Pin<&mut {ty_str}>`, \
@@ -523,6 +520,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
             self.note_candidates_on_method_error(
                 rcvr_ty,
                 item_name,
+                source,
                 args,
                 span,
                 &mut err,
@@ -533,6 +531,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
             self.note_candidates_on_method_error(
                 rcvr_ty,
                 item_name,
+                source,
                 args,
                 span,
                 &mut err,
@@ -976,7 +975,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                 unsatisfied_bounds = true;
             }
         } else if let ty::Adt(def, targs) = rcvr_ty.kind()
-            && let Some(args) = args
+            && let SelfSource::MethodCall(rcvr_expr) = source
         {
             // This is useful for methods on arbitrary self types that might have a simple
             // mutability difference, like calling a method on `Pin<&mut Self>` that is on
@@ -999,8 +998,8 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                         rcvr_ty,
                         &item_segment,
                         span,
-                        args.full_expr,
-                        args.receiver,
+                        tcx.hir().get_parent(rcvr_expr.hir_id).expect_expr(),
+                        rcvr_expr,
                     ) {
                         err.span_note(
                             tcx.def_span(method.def_id),
@@ -1169,7 +1168,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                 span,
                 rcvr_ty,
                 item_name,
-                args.map(|MethodCallComponents { args, .. }| args.len() + 1),
+                args.map(|args| args.len() + 1),
                 source,
                 no_match_data.out_of_scope_traits.clone(),
                 &unsatisfied_predicates,
@@ -1250,7 +1249,8 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         &self,
         rcvr_ty: Ty<'tcx>,
         item_name: Ident,
-        args: Option<MethodCallComponents<'tcx>>,
+        self_source: SelfSource<'tcx>,
+        args: Option<&'tcx [hir::Expr<'tcx>]>,
         span: Span,
         err: &mut Diagnostic,
         sources: &mut Vec<CandidateSource>,
@@ -1320,38 +1320,21 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                     }
                     if let Some(sugg_span) = sugg_span
                         && let Some(trait_ref) = self.tcx.impl_trait_ref(impl_did)
-                    {
-                        let path = self.tcx.def_path_str(trait_ref.skip_binder().def_id);
-
-                        let ty = match item.kind {
-                            ty::AssocKind::Const | ty::AssocKind::Type => impl_ty,
-                            ty::AssocKind::Fn => self
-                                .tcx
-                                .fn_sig(item.def_id)
-                                .instantiate_identity()
-                                .inputs()
-                                .skip_binder()
-                                .get(0)
-                                .filter(|ty| ty.is_ref() && !rcvr_ty.is_ref())
-                                .copied()
-                                .unwrap_or(rcvr_ty),
-                        };
-                        if let Some(sugg) = print_disambiguation_help(
-                            item_name,
-                            args,
+                        && let Some(sugg) = print_disambiguation_help(
+                            self.tcx,
                             err,
-                            path,
-                            ty,
-                            Some(impl_ty),
-                            item.kind,
-                            self.tcx.def_kind_descr(item.kind.as_def_kind(), item.def_id),
-                            sugg_span,
+                            self_source,
+                            args,
+                            trait_ref.instantiate(
+                                self.tcx,
+                                self.fresh_args_for_item(sugg_span, impl_did)
+                            ).with_self_ty(self.tcx, rcvr_ty),
                             idx,
-                            self.tcx.sess.source_map(),
-                            item.fn_has_self_parameter,
-                        ) {
-                            suggs.push(sugg);
-                        }
+                            sugg_span,
+                            item,
+                        )
+                    {
+                        suggs.push(sugg);
                     }
                 }
                 CandidateSource::Trait(trait_did) => {
@@ -1373,24 +1356,23 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                         err.span_note(item_span, msg);
                         None
                     };
-                    if let Some(sugg_span) = sugg_span {
-                        let path = self.tcx.def_path_str(trait_did);
-                        if let Some(sugg) = print_disambiguation_help(
-                            item_name,
-                            args,
+                    if let Some(sugg_span) = sugg_span
+                        && let Some(sugg) = print_disambiguation_help(
+                            self.tcx,
                             err,
-                            path,
-                            rcvr_ty,
-                            None,
-                            item.kind,
-                            self.tcx.def_kind_descr(item.kind.as_def_kind(), item.def_id),
-                            sugg_span,
+                            self_source,
+                            args,
+                            ty::TraitRef::new(
+                                self.tcx,
+                                trait_did,
+                                self.fresh_args_for_item(sugg_span, trait_did)
+                            ).with_self_ty(self.tcx, rcvr_ty),
                             idx,
-                            self.tcx.sess.source_map(),
-                            item.fn_has_self_parameter,
-                        ) {
-                            suggs.push(sugg);
-                        }
+                            sugg_span,
+                            item,
+                        )
+                    {
+                        suggs.push(sugg);
                     }
                 }
             }
@@ -1410,18 +1392,10 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
 
     /// Look at all the associated functions without receivers in the type's inherent impls
     /// to look for builders that return `Self`, `Option<Self>` or `Result<Self, _>`.
-    fn find_builder_fn(&self, err: &mut Diagnostic, rcvr_ty: Ty<'tcx>, source: SelfSource<'tcx>) {
+    fn find_builder_fn(&self, err: &mut Diagnostic, rcvr_ty: Ty<'tcx>) {
         let ty::Adt(adt_def, _) = rcvr_ty.kind() else {
             return;
         };
-        let SelfSource::QPath(ty) = source else {
-            return;
-        };
-        let hir = self.tcx.hir();
-        if let Some(Node::Pat(_)) = hir.find(hir.parent_id(ty.hir_id)) {
-            // Do not suggest a fn call when a pattern is expected.
-            return;
-        }
         let mut items = self
             .tcx
             .inherent_impls(adt_def.did())
@@ -1504,7 +1478,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         rcvr_ty: Ty<'tcx>,
         source: SelfSource<'tcx>,
         item_name: Ident,
-        args: Option<MethodCallComponents<'tcx>>,
+        args: Option<&'tcx [hir::Expr<'tcx>]>,
         sugg_span: Span,
     ) {
         let mut has_unsuggestable_args = false;
@@ -1578,38 +1552,40 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                 None
             };
             let mut applicability = Applicability::MachineApplicable;
-            let args = if let Some(MethodCallComponents { receiver, args, .. }) = args {
-                // The first arg is the same kind as the receiver
-                let explicit_args = if first_arg.is_some() {
-                    std::iter::once(receiver).chain(args.iter()).collect::<Vec<_>>()
+            let args = if let SelfSource::MethodCall(receiver) = source
+                    && let Some(args) = args
+                {
+                    // The first arg is the same kind as the receiver
+                    let explicit_args = if first_arg.is_some() {
+                        std::iter::once(receiver).chain(args.iter()).collect::<Vec<_>>()
+                    } else {
+                        // There is no `Self` kind to infer the arguments from
+                        if has_unsuggestable_args {
+                            applicability = Applicability::HasPlaceholders;
+                        }
+                        args.iter().collect()
+                    };
+                    format!(
+                        "({}{})",
+                        first_arg.unwrap_or(""),
+                        explicit_args
+                            .iter()
+                            .map(|arg| self
+                                .tcx
+                                .sess
+                                .source_map()
+                                .span_to_snippet(arg.span)
+                                .unwrap_or_else(|_| {
+                                    applicability = Applicability::HasPlaceholders;
+                                    "_".to_owned()
+                                }))
+                            .collect::<Vec<_>>()
+                            .join(", "),
+                    )
                 } else {
-                    // There is no `Self` kind to infer the arguments from
-                    if has_unsuggestable_args {
-                        applicability = Applicability::HasPlaceholders;
-                    }
-                    args.iter().collect()
+                    applicability = Applicability::HasPlaceholders;
+                    "(...)".to_owned()
                 };
-                format!(
-                    "({}{})",
-                    first_arg.unwrap_or(""),
-                    explicit_args
-                        .iter()
-                        .map(|arg| self
-                            .tcx
-                            .sess
-                            .source_map()
-                            .span_to_snippet(arg.span)
-                            .unwrap_or_else(|_| {
-                                applicability = Applicability::HasPlaceholders;
-                                "_".to_owned()
-                            }))
-                        .collect::<Vec<_>>()
-                        .join(", "),
-                )
-            } else {
-                applicability = Applicability::HasPlaceholders;
-                "(...)".to_owned()
-            };
             err.span_suggestion(
                 sugg_span,
                 "use associated function syntax instead",
@@ -3267,56 +3243,59 @@ pub fn all_traits(tcx: TyCtxt<'_>) -> Vec<TraitInfo> {
 }
 
 fn print_disambiguation_help<'tcx>(
-    item_name: Ident,
-    args: Option<MethodCallComponents<'tcx>>,
+    tcx: TyCtxt<'tcx>,
     err: &mut Diagnostic,
-    trait_name: String,
-    rcvr_ty: Ty<'_>,
-    impl_self_ty: Option<Ty<'_>>,
-    kind: ty::AssocKind,
-    def_kind_descr: &'static str,
+    source: SelfSource<'tcx>,
+    args: Option<&'tcx [hir::Expr<'tcx>]>,
+    trait_ref: ty::TraitRef<'tcx>,
+    candidate_idx: Option<usize>,
     span: Span,
-    candidate: Option<usize>,
-    source_map: &source_map::SourceMap,
-    fn_has_self_parameter: bool,
+    item: ty::AssocItem,
 ) -> Option<String> {
+    let trait_ref = if item.fn_has_self_parameter {
+        trait_ref.print_only_trait_name().to_string()
+    } else {
+        format!("<{} as {}>", trait_ref.args[0], trait_ref.print_only_trait_name())
+    };
     Some(
-        if let (ty::AssocKind::Fn, Some(MethodCallComponents { receiver, args, .. })) = (kind, args)
+        if matches!(item.kind, ty::AssocKind::Fn)
+            && let SelfSource::MethodCall(receiver) = source
+            && let Some(args) = args
         {
+            let def_kind_descr = tcx.def_kind_descr(item.kind.as_def_kind(), item.def_id);
+            let item_name = item.ident(tcx);
+            let rcvr_ref = tcx.fn_sig(item.def_id).skip_binder().skip_binder().inputs()[0]
+                .ref_mutability()
+                .map_or("", |mutbl| mutbl.ref_prefix_str());
             let args = format!(
                 "({}{})",
-                rcvr_ty.ref_mutability().map_or("", |mutbl| mutbl.ref_prefix_str()),
+                rcvr_ref,
                 std::iter::once(receiver)
                     .chain(args.iter())
-                    .map(|arg| source_map
+                    .map(|arg| tcx
+                        .sess
+                        .source_map()
                         .span_to_snippet(arg.span)
                         .unwrap_or_else(|_| { "_".to_owned() }))
                     .collect::<Vec<_>>()
                     .join(", "),
             );
-            let trait_name = if !fn_has_self_parameter && let Some(impl_self_ty) = impl_self_ty {
-            format!("<{impl_self_ty} as {trait_name}>")
-        } else {
-            trait_name
-        };
             err.span_suggestion_verbose(
                 span,
                 format!(
                     "disambiguate the {def_kind_descr} for {}",
-                    if let Some(candidate) = candidate {
+                    if let Some(candidate) = candidate_idx {
                         format!("candidate #{candidate}")
                     } else {
                         "the candidate".to_string()
                     },
                 ),
-                format!("{trait_name}::{item_name}{args}"),
+                format!("{trait_ref}::{item_name}{args}"),
                 Applicability::HasPlaceholders,
             );
             return None;
-        } else if let Some(impl_self_ty) = impl_self_ty {
-            format!("<{impl_self_ty} as {trait_name}>::")
         } else {
-            format!("{trait_name}::")
+            format!("{trait_ref}::")
         },
     )
 }
diff --git a/compiler/rustc_hir_typeck/src/pat.rs b/compiler/rustc_hir_typeck/src/pat.rs
index 50684482c0d..b30f9b82fbb 100644
--- a/compiler/rustc_hir_typeck/src/pat.rs
+++ b/compiler/rustc_hir_typeck/src/pat.rs
@@ -166,9 +166,9 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
     fn check_pat(&self, pat: &'tcx Pat<'tcx>, expected: Ty<'tcx>, pat_info: PatInfo<'tcx, '_>) {
         let PatInfo { binding_mode: def_bm, top_info: ti, .. } = pat_info;
         let path_res = match &pat.kind {
-            PatKind::Path(qpath) => {
-                Some(self.resolve_ty_and_res_fully_qualified_call(qpath, pat.hir_id, pat.span))
-            }
+            PatKind::Path(qpath) => Some(
+                self.resolve_ty_and_res_fully_qualified_call(qpath, pat.hir_id, pat.span, None),
+            ),
             _ => None,
         };
         let adjust_mode = self.calc_adjust_mode(pat, path_res.map(|(res, ..)| res));
@@ -1060,7 +1060,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
 
         // Resolve the path and check the definition for errors.
         let (res, opt_ty, segments) =
-            self.resolve_ty_and_res_fully_qualified_call(qpath, pat.hir_id, pat.span);
+            self.resolve_ty_and_res_fully_qualified_call(qpath, pat.hir_id, pat.span, None);
         if res == Res::Err {
             let e = tcx.sess.delay_span_bug(pat.span, "`Res::Err` but no error emitted");
             self.set_tainted_by_errors(e);
diff --git a/compiler/rustc_interface/src/tests.rs b/compiler/rustc_interface/src/tests.rs
index 8e66083a390..d3081695523 100644
--- a/compiler/rustc_interface/src/tests.rs
+++ b/compiler/rustc_interface/src/tests.rs
@@ -4,11 +4,11 @@ use rustc_data_structures::profiling::TimePassesFormat;
 use rustc_errors::{emitter::HumanReadableErrorType, registry, ColorConfig};
 use rustc_session::config::{
     build_configuration, build_session_options, rustc_optgroups, BranchProtection, CFGuard, Cfg,
-    DebugInfo, DumpMonoStatsFormat, ErrorOutputType, ExternEntry, ExternLocation, Externs, Input,
-    InstrumentCoverage, InstrumentXRay, LinkSelfContained, LinkerPluginLto, LocationDetail, LtoCli,
-    MirSpanview, OomStrategy, Options, OutFileName, OutputType, OutputTypes, PAuthKey, PacRet,
-    Passes, Polonius, ProcMacroExecutionStrategy, Strip, SwitchWithOptPath, SymbolManglingVersion,
-    TraitSolver, WasiExecModel,
+    DebugInfo, DumpMonoStatsFormat, ErrorOutputType, ExternEntry, ExternLocation, Externs,
+    InliningThreshold, Input, InstrumentCoverage, InstrumentXRay, LinkSelfContained,
+    LinkerPluginLto, LocationDetail, LtoCli, MirSpanview, OomStrategy, Options, OutFileName,
+    OutputType, OutputTypes, PAuthKey, PacRet, Passes, Polonius, ProcMacroExecutionStrategy, Strip,
+    SwitchWithOptPath, SymbolManglingVersion, TraitSolver, WasiExecModel,
 };
 use rustc_session::lint::Level;
 use rustc_session::search_paths::SearchPath;
@@ -748,7 +748,7 @@ fn test_unstable_options_tracking_hash() {
     );
     tracked!(codegen_backend, Some("abc".to_string()));
     tracked!(crate_attr, vec!["abc".to_string()]);
-    tracked!(cross_crate_inline_threshold, Some(200));
+    tracked!(cross_crate_inline_threshold, InliningThreshold::Always);
     tracked!(debug_info_for_profiling, true);
     tracked!(debug_macros, true);
     tracked!(dep_info_omit_d_target, true);
diff --git a/compiler/rustc_llvm/llvm-wrapper/LLVMWrapper.h b/compiler/rustc_llvm/llvm-wrapper/LLVMWrapper.h
index 3f2bf2c9b44..142384e6d0c 100644
--- a/compiler/rustc_llvm/llvm-wrapper/LLVMWrapper.h
+++ b/compiler/rustc_llvm/llvm-wrapper/LLVMWrapper.h
@@ -25,7 +25,6 @@
 #include "llvm/Transforms/IPO.h"
 #include "llvm/Transforms/Instrumentation.h"
 #include "llvm/Transforms/Scalar.h"
-#include "llvm/Transforms/Vectorize.h"
 
 #define LLVM_VERSION_GE(major, minor)                                          \
   (LLVM_VERSION_MAJOR > (major) ||                                             \
diff --git a/compiler/rustc_metadata/src/lib.rs b/compiler/rustc_metadata/src/lib.rs
index ec2517b581e..b06b4fb87cd 100644
--- a/compiler/rustc_metadata/src/lib.rs
+++ b/compiler/rustc_metadata/src/lib.rs
@@ -8,6 +8,7 @@
 #![cfg_attr(not(bootstrap), feature(coroutines))]
 #![feature(iter_from_coroutine)]
 #![feature(let_chains)]
+#![feature(if_let_guard)]
 #![feature(proc_macro_internals)]
 #![feature(macro_metavar_expr)]
 #![feature(min_specialization)]
diff --git a/compiler/rustc_metadata/src/rmeta/encoder.rs b/compiler/rustc_metadata/src/rmeta/encoder.rs
index de436c16ca9..2042863d189 100644
--- a/compiler/rustc_metadata/src/rmeta/encoder.rs
+++ b/compiler/rustc_metadata/src/rmeta/encoder.rs
@@ -2386,31 +2386,32 @@ pub fn rendered_const<'tcx>(tcx: TyCtxt<'tcx>, body: hir::BodyId) -> String {
         }
     }
 
-    let classification = classify(value);
-
-    if classification == Literal
-        && !value.span.from_expansion()
-        && let Ok(snippet) = tcx.sess.source_map().span_to_snippet(value.span)
-    {
-        // For literals, we avoid invoking the pretty-printer and use the source snippet instead to
-        // preserve certain stylistic choices the user likely made for the sake legibility like
+    match classify(value) {
+        // For non-macro literals, we avoid invoking the pretty-printer and use the source snippet
+        // instead to preserve certain stylistic choices the user likely made for the sake of
+        // legibility, like:
         //
         // * hexadecimal notation
         // * underscores
         // * character escapes
         //
         // FIXME: This passes through `-/*spacer*/0` verbatim.
-        snippet
-    } else if classification == Simple {
+        Literal if !value.span.from_expansion()
+            && let Ok(snippet) = tcx.sess.source_map().span_to_snippet(value.span) => {
+            snippet
+        }
+
         // Otherwise we prefer pretty-printing to get rid of extraneous whitespace, comments and
         // other formatting artifacts.
-        id_to_string(&hir, body.hir_id)
-    } else if tcx.def_kind(hir.body_owner_def_id(body).to_def_id()) == DefKind::AnonConst {
+        Literal | Simple => id_to_string(&hir, body.hir_id),
+
         // FIXME: Omit the curly braces if the enclosing expression is an array literal
         //        with a repeated element (an `ExprKind::Repeat`) as in such case it
         //        would not actually need any disambiguation.
-        "{ _ }".to_owned()
-    } else {
-        "_".to_owned()
+        Complex => if tcx.def_kind(hir.body_owner_def_id(body).to_def_id()) == DefKind::AnonConst {
+            "{ _ }".to_owned()
+        } else {
+            "_".to_owned()
+        }
     }
 }
diff --git a/compiler/rustc_middle/src/query/erase.rs b/compiler/rustc_middle/src/query/erase.rs
index e20e9d9312c..cdde6a596a8 100644
--- a/compiler/rustc_middle/src/query/erase.rs
+++ b/compiler/rustc_middle/src/query/erase.rs
@@ -2,7 +2,8 @@ use crate::mir;
 use crate::query::CyclePlaceholder;
 use crate::traits;
 use crate::ty::{self, Ty};
-use std::mem::{size_of, transmute_copy, MaybeUninit};
+use std::intrinsics::transmute_unchecked;
+use std::mem::{size_of, MaybeUninit};
 
 #[derive(Copy, Clone)]
 pub struct Erased<T: Copy> {
@@ -29,8 +30,15 @@ pub fn erase<T: EraseType>(src: T) -> Erase<T> {
     };
 
     Erased::<<T as EraseType>::Result> {
+        // `transmute_unchecked` is needed here because it does not have `transmute`'s size check
+        // (and thus allows to transmute between `T` and `MaybeUninit<T::Result>`) (we do the size
+        // check ourselves in the `const` block above).
+        //
+        // `transmute_copy` is also commonly used for this (and it would work here since
+        // `EraseType: Copy`), but `transmute_unchecked` better explains the intent.
+        //
         // SAFETY: It is safe to transmute to MaybeUninit for types with the same sizes.
-        data: unsafe { transmute_copy(&src) },
+        data: unsafe { transmute_unchecked::<T, MaybeUninit<T::Result>>(src) },
     }
 }
 
@@ -38,22 +46,24 @@ pub fn erase<T: EraseType>(src: T) -> Erase<T> {
 #[inline(always)]
 pub fn restore<T: EraseType>(value: Erase<T>) -> T {
     let value: Erased<<T as EraseType>::Result> = value;
+    // See comment in `erase` for why we use `transmute_unchecked`.
+    //
     // SAFETY: Due to the use of impl Trait in `Erase` the only way to safely create an instance
     // of `Erase` is to call `erase`, so we know that `value.data` is a valid instance of `T` of
     // the right size.
-    unsafe { transmute_copy(&value.data) }
+    unsafe { transmute_unchecked::<MaybeUninit<T::Result>, T>(value.data) }
 }
 
 impl<T> EraseType for &'_ T {
-    type Result = [u8; size_of::<*const ()>()];
+    type Result = [u8; size_of::<&'static ()>()];
 }
 
 impl<T> EraseType for &'_ [T] {
-    type Result = [u8; size_of::<*const [()]>()];
+    type Result = [u8; size_of::<&'static [()]>()];
 }
 
 impl<T> EraseType for &'_ ty::List<T> {
-    type Result = [u8; size_of::<*const ()>()];
+    type Result = [u8; size_of::<&'static ty::List<()>>()];
 }
 
 impl<I: rustc_index::Idx, T> EraseType for &'_ rustc_index::IndexSlice<I, T> {
diff --git a/compiler/rustc_middle/src/thir/visit.rs b/compiler/rustc_middle/src/thir/visit.rs
index d03d92c3a4b..8feefb4c03c 100644
--- a/compiler/rustc_middle/src/thir/visit.rs
+++ b/compiler/rustc_middle/src/thir/visit.rs
@@ -66,8 +66,9 @@ pub fn walk_expr<'a, 'tcx: 'a, V: Visitor<'a, 'tcx>>(visitor: &mut V, expr: &Exp
         Use { source } => visitor.visit_expr(&visitor.thir()[source]),
         NeverToAny { source } => visitor.visit_expr(&visitor.thir()[source]),
         PointerCoercion { source, cast: _ } => visitor.visit_expr(&visitor.thir()[source]),
-        Let { expr, .. } => {
+        Let { expr, ref pat } => {
             visitor.visit_expr(&visitor.thir()[expr]);
+            visitor.visit_pat(pat);
         }
         Loop { body } => visitor.visit_expr(&visitor.thir()[body]),
         Match { scrutinee, ref arms, .. } => {
diff --git a/compiler/rustc_middle/src/traits/mod.rs b/compiler/rustc_middle/src/traits/mod.rs
index 9e2ff3820af..6cd75e08727 100644
--- a/compiler/rustc_middle/src/traits/mod.rs
+++ b/compiler/rustc_middle/src/traits/mod.rs
@@ -305,9 +305,14 @@ pub enum ObligationCauseCode<'tcx> {
     SizedCoroutineInterior(LocalDefId),
     /// `[expr; N]` requires `type_of(expr): Copy`.
     RepeatElementCopy {
-        /// If element is a `const fn` we display a help message suggesting to move the
-        /// function call to a new `const` item while saying that `T` doesn't implement `Copy`.
-        is_const_fn: bool,
+        /// If element is a `const fn` or const ctor we display a help message suggesting
+        /// to move it to a new `const` item while saying that `T` doesn't implement `Copy`.
+        is_constable: IsConstable,
+        elt_type: Ty<'tcx>,
+        elt_span: Span,
+        /// Span of the statement/item in which the repeat expression occurs. We can use this to
+        /// place a `const` declaration before it
+        elt_stmt_span: Span,
     },
 
     /// Types of fields (other than the last, except for packed structs) in a struct must be sized.
@@ -455,6 +460,21 @@ pub enum ObligationCauseCode<'tcx> {
     TypeAlias(InternedObligationCauseCode<'tcx>, Span, DefId),
 }
 
+/// Whether a value can be extracted into a const.
+/// Used for diagnostics around array repeat expressions.
+#[derive(Copy, Clone, Debug, PartialEq, Eq, HashStable, TyEncodable, TyDecodable)]
+pub enum IsConstable {
+    No,
+    /// Call to a const fn
+    Fn,
+    /// Use of a const ctor
+    Ctor,
+}
+
+crate::TrivialTypeTraversalAndLiftImpls! {
+    IsConstable,
+}
+
 /// The 'location' at which we try to perform HIR-based wf checking.
 /// This information is used to obtain an `hir::Ty`, which
 /// we can walk in order to obtain precise spans for any
diff --git a/compiler/rustc_middle/src/ty/diagnostics.rs b/compiler/rustc_middle/src/ty/diagnostics.rs
index 77a50fa9276..0094825fc70 100644
--- a/compiler/rustc_middle/src/ty/diagnostics.rs
+++ b/compiler/rustc_middle/src/ty/diagnostics.rs
@@ -274,7 +274,7 @@ pub fn suggest_constraining_type_params<'a>(
                 span,
                 if span_to_replace.is_some() {
                     constraint.clone()
-                } else if constraint.starts_with("<") {
+                } else if constraint.starts_with('<') {
                     constraint.to_string()
                 } else if bound_list_non_empty {
                     format!(" + {constraint}")
diff --git a/compiler/rustc_mir_build/messages.ftl b/compiler/rustc_mir_build/messages.ftl
index 563851f712c..54fc8f77f93 100644
--- a/compiler/rustc_mir_build/messages.ftl
+++ b/compiler/rustc_mir_build/messages.ftl
@@ -320,6 +320,7 @@ mir_build_unreachable_pattern = unreachable pattern
     .label = unreachable pattern
     .catchall_label = matches any value
 
+mir_build_unsafe_fn_safe_body = an unsafe function restricts its caller, but its body is safe by default
 mir_build_unsafe_not_inherited = items do not inherit unsafety from separate enclosing items
 
 mir_build_unsafe_op_in_unsafe_fn_borrow_of_layout_constrained_field_requires_unsafe =
@@ -386,3 +387,5 @@ mir_build_unused_unsafe = unnecessary `unsafe` block
 mir_build_unused_unsafe_enclosing_block_label = because it's nested under this `unsafe` block
 
 mir_build_variant_defined_here = not covered
+
+mir_build_wrap_suggestion = consider wrapping the function body in an unsafe block
diff --git a/compiler/rustc_mir_build/src/check_unsafety.rs b/compiler/rustc_mir_build/src/check_unsafety.rs
index 45be5015371..3d895c131a8 100644
--- a/compiler/rustc_mir_build/src/check_unsafety.rs
+++ b/compiler/rustc_mir_build/src/check_unsafety.rs
@@ -35,6 +35,10 @@ struct UnsafetyVisitor<'a, 'tcx> {
     param_env: ParamEnv<'tcx>,
     inside_adt: bool,
     warnings: &'a mut Vec<UnusedUnsafeWarning>,
+
+    /// Flag to ensure that we only suggest wrapping the entire function body in
+    /// an unsafe block once.
+    suggest_unsafe_block: bool,
 }
 
 impl<'tcx> UnsafetyVisitor<'_, 'tcx> {
@@ -95,7 +99,13 @@ impl<'tcx> UnsafetyVisitor<'_, 'tcx> {
             SafetyContext::UnsafeFn if unsafe_op_in_unsafe_fn_allowed => {}
             SafetyContext::UnsafeFn => {
                 // unsafe_op_in_unsafe_fn is disallowed
-                kind.emit_unsafe_op_in_unsafe_fn_lint(self.tcx, self.hir_context, span);
+                kind.emit_unsafe_op_in_unsafe_fn_lint(
+                    self.tcx,
+                    self.hir_context,
+                    span,
+                    self.suggest_unsafe_block,
+                );
+                self.suggest_unsafe_block = false;
             }
             SafetyContext::Safe => {
                 kind.emit_requires_unsafe_err(
@@ -297,6 +307,7 @@ impl<'a, 'tcx> Visitor<'a, 'tcx> for UnsafetyVisitor<'a, 'tcx> {
             }
             PatKind::InlineConstant { def, .. } => {
                 self.visit_inner_body(*def);
+                visit::walk_pat(self, pat);
             }
             _ => {
                 visit::walk_pat(self, pat);
@@ -394,7 +405,9 @@ impl<'a, 'tcx> Visitor<'a, 'tcx> for UnsafetyVisitor<'a, 'tcx> {
                 }
             }
             ExprKind::Deref { arg } => {
-                if let ExprKind::StaticRef { def_id, .. } = self.thir[arg].kind {
+                if let ExprKind::StaticRef { def_id, .. } | ExprKind::ThreadLocalRef(def_id) =
+                    self.thir[arg].kind
+                {
                     if self.tcx.is_mutable_static(def_id) {
                         self.requires_unsafe(expr.span, UseOfMutableStatic);
                     } else if self.tcx.is_foreign_item(def_id) {
@@ -482,14 +495,6 @@ impl<'a, 'tcx> Visitor<'a, 'tcx> for UnsafetyVisitor<'a, 'tcx> {
                     }
                 }
             }
-            ExprKind::Let { expr: expr_id, .. } => {
-                let let_expr = &self.thir[expr_id];
-                if let ty::Adt(adt_def, _) = let_expr.ty.kind()
-                    && adt_def.is_union()
-                {
-                    self.requires_unsafe(expr.span, AccessToUnionField);
-                }
-            }
             _ => {}
         }
         visit::walk_expr(self, expr);
@@ -543,7 +548,22 @@ impl UnsafeOpKind {
         tcx: TyCtxt<'_>,
         hir_id: hir::HirId,
         span: Span,
+        suggest_unsafe_block: bool,
     ) {
+        let parent_id = tcx.hir().get_parent_item(hir_id);
+        let parent_owner = tcx.hir().owner(parent_id);
+        let should_suggest = parent_owner.fn_sig().map_or(false, |sig| sig.header.is_unsafe());
+        let unsafe_not_inherited_note = if should_suggest {
+            suggest_unsafe_block.then(|| {
+                let body_span = tcx.hir().body(parent_owner.body_id().unwrap()).value.span;
+                UnsafeNotInheritedLintNote {
+                    signature_span: tcx.def_span(parent_id.def_id),
+                    body_span,
+                }
+            })
+        } else {
+            None
+        };
         // FIXME: ideally we would want to trim the def paths, but this is not
         // feasible with the current lint emission API (see issue #106126).
         match self {
@@ -554,61 +574,89 @@ impl UnsafeOpKind {
                 UnsafeOpInUnsafeFnCallToUnsafeFunctionRequiresUnsafe {
                     span,
                     function: &with_no_trimmed_paths!(tcx.def_path_str(*did)),
+                    unsafe_not_inherited_note,
                 },
             ),
             CallToUnsafeFunction(None) => tcx.emit_spanned_lint(
                 UNSAFE_OP_IN_UNSAFE_FN,
                 hir_id,
                 span,
-                UnsafeOpInUnsafeFnCallToUnsafeFunctionRequiresUnsafeNameless { span },
+                UnsafeOpInUnsafeFnCallToUnsafeFunctionRequiresUnsafeNameless {
+                    span,
+                    unsafe_not_inherited_note,
+                },
             ),
             UseOfInlineAssembly => tcx.emit_spanned_lint(
                 UNSAFE_OP_IN_UNSAFE_FN,
                 hir_id,
                 span,
-                UnsafeOpInUnsafeFnUseOfInlineAssemblyRequiresUnsafe { span },
+                UnsafeOpInUnsafeFnUseOfInlineAssemblyRequiresUnsafe {
+                    span,
+                    unsafe_not_inherited_note,
+                },
             ),
             InitializingTypeWith => tcx.emit_spanned_lint(
                 UNSAFE_OP_IN_UNSAFE_FN,
                 hir_id,
                 span,
-                UnsafeOpInUnsafeFnInitializingTypeWithRequiresUnsafe { span },
+                UnsafeOpInUnsafeFnInitializingTypeWithRequiresUnsafe {
+                    span,
+                    unsafe_not_inherited_note,
+                },
             ),
             UseOfMutableStatic => tcx.emit_spanned_lint(
                 UNSAFE_OP_IN_UNSAFE_FN,
                 hir_id,
                 span,
-                UnsafeOpInUnsafeFnUseOfMutableStaticRequiresUnsafe { span },
+                UnsafeOpInUnsafeFnUseOfMutableStaticRequiresUnsafe {
+                    span,
+                    unsafe_not_inherited_note,
+                },
             ),
             UseOfExternStatic => tcx.emit_spanned_lint(
                 UNSAFE_OP_IN_UNSAFE_FN,
                 hir_id,
                 span,
-                UnsafeOpInUnsafeFnUseOfExternStaticRequiresUnsafe { span },
+                UnsafeOpInUnsafeFnUseOfExternStaticRequiresUnsafe {
+                    span,
+                    unsafe_not_inherited_note,
+                },
             ),
             DerefOfRawPointer => tcx.emit_spanned_lint(
                 UNSAFE_OP_IN_UNSAFE_FN,
                 hir_id,
                 span,
-                UnsafeOpInUnsafeFnDerefOfRawPointerRequiresUnsafe { span },
+                UnsafeOpInUnsafeFnDerefOfRawPointerRequiresUnsafe {
+                    span,
+                    unsafe_not_inherited_note,
+                },
             ),
             AccessToUnionField => tcx.emit_spanned_lint(
                 UNSAFE_OP_IN_UNSAFE_FN,
                 hir_id,
                 span,
-                UnsafeOpInUnsafeFnAccessToUnionFieldRequiresUnsafe { span },
+                UnsafeOpInUnsafeFnAccessToUnionFieldRequiresUnsafe {
+                    span,
+                    unsafe_not_inherited_note,
+                },
             ),
             MutationOfLayoutConstrainedField => tcx.emit_spanned_lint(
                 UNSAFE_OP_IN_UNSAFE_FN,
                 hir_id,
                 span,
-                UnsafeOpInUnsafeFnMutationOfLayoutConstrainedFieldRequiresUnsafe { span },
+                UnsafeOpInUnsafeFnMutationOfLayoutConstrainedFieldRequiresUnsafe {
+                    span,
+                    unsafe_not_inherited_note,
+                },
             ),
             BorrowOfLayoutConstrainedField => tcx.emit_spanned_lint(
                 UNSAFE_OP_IN_UNSAFE_FN,
                 hir_id,
                 span,
-                UnsafeOpInUnsafeFnBorrowOfLayoutConstrainedFieldRequiresUnsafe { span },
+                UnsafeOpInUnsafeFnBorrowOfLayoutConstrainedFieldRequiresUnsafe {
+                    span,
+                    unsafe_not_inherited_note,
+                },
             ),
             CallToFunctionWith(did) => tcx.emit_spanned_lint(
                 UNSAFE_OP_IN_UNSAFE_FN,
@@ -617,6 +665,7 @@ impl UnsafeOpKind {
                 UnsafeOpInUnsafeFnCallToFunctionWithRequiresUnsafe {
                     span,
                     function: &with_no_trimmed_paths!(tcx.def_path_str(*did)),
+                    unsafe_not_inherited_note,
                 },
             ),
         }
@@ -831,6 +880,7 @@ pub fn thir_check_unsafety(tcx: TyCtxt<'_>, def: LocalDefId) {
         param_env: tcx.param_env(def),
         inside_adt: false,
         warnings: &mut warnings,
+        suggest_unsafe_block: true,
     };
     visitor.visit_expr(&thir[expr]);
 
diff --git a/compiler/rustc_mir_build/src/errors.rs b/compiler/rustc_mir_build/src/errors.rs
index c4eed5532ee..418f9bb9de9 100644
--- a/compiler/rustc_mir_build/src/errors.rs
+++ b/compiler/rustc_mir_build/src/errors.rs
@@ -29,6 +29,8 @@ pub struct UnsafeOpInUnsafeFnCallToUnsafeFunctionRequiresUnsafe<'a> {
     #[label]
     pub span: Span,
     pub function: &'a str,
+    #[subdiagnostic]
+    pub unsafe_not_inherited_note: Option<UnsafeNotInheritedLintNote>,
 }
 
 #[derive(LintDiagnostic)]
@@ -37,6 +39,8 @@ pub struct UnsafeOpInUnsafeFnCallToUnsafeFunctionRequiresUnsafe<'a> {
 pub struct UnsafeOpInUnsafeFnCallToUnsafeFunctionRequiresUnsafeNameless {
     #[label]
     pub span: Span,
+    #[subdiagnostic]
+    pub unsafe_not_inherited_note: Option<UnsafeNotInheritedLintNote>,
 }
 
 #[derive(LintDiagnostic)]
@@ -45,6 +49,8 @@ pub struct UnsafeOpInUnsafeFnCallToUnsafeFunctionRequiresUnsafeNameless {
 pub struct UnsafeOpInUnsafeFnUseOfInlineAssemblyRequiresUnsafe {
     #[label]
     pub span: Span,
+    #[subdiagnostic]
+    pub unsafe_not_inherited_note: Option<UnsafeNotInheritedLintNote>,
 }
 
 #[derive(LintDiagnostic)]
@@ -53,6 +59,8 @@ pub struct UnsafeOpInUnsafeFnUseOfInlineAssemblyRequiresUnsafe {
 pub struct UnsafeOpInUnsafeFnInitializingTypeWithRequiresUnsafe {
     #[label]
     pub span: Span,
+    #[subdiagnostic]
+    pub unsafe_not_inherited_note: Option<UnsafeNotInheritedLintNote>,
 }
 
 #[derive(LintDiagnostic)]
@@ -61,6 +69,8 @@ pub struct UnsafeOpInUnsafeFnInitializingTypeWithRequiresUnsafe {
 pub struct UnsafeOpInUnsafeFnUseOfMutableStaticRequiresUnsafe {
     #[label]
     pub span: Span,
+    #[subdiagnostic]
+    pub unsafe_not_inherited_note: Option<UnsafeNotInheritedLintNote>,
 }
 
 #[derive(LintDiagnostic)]
@@ -69,6 +79,8 @@ pub struct UnsafeOpInUnsafeFnUseOfMutableStaticRequiresUnsafe {
 pub struct UnsafeOpInUnsafeFnUseOfExternStaticRequiresUnsafe {
     #[label]
     pub span: Span,
+    #[subdiagnostic]
+    pub unsafe_not_inherited_note: Option<UnsafeNotInheritedLintNote>,
 }
 
 #[derive(LintDiagnostic)]
@@ -77,6 +89,8 @@ pub struct UnsafeOpInUnsafeFnUseOfExternStaticRequiresUnsafe {
 pub struct UnsafeOpInUnsafeFnDerefOfRawPointerRequiresUnsafe {
     #[label]
     pub span: Span,
+    #[subdiagnostic]
+    pub unsafe_not_inherited_note: Option<UnsafeNotInheritedLintNote>,
 }
 
 #[derive(LintDiagnostic)]
@@ -85,6 +99,8 @@ pub struct UnsafeOpInUnsafeFnDerefOfRawPointerRequiresUnsafe {
 pub struct UnsafeOpInUnsafeFnAccessToUnionFieldRequiresUnsafe {
     #[label]
     pub span: Span,
+    #[subdiagnostic]
+    pub unsafe_not_inherited_note: Option<UnsafeNotInheritedLintNote>,
 }
 
 #[derive(LintDiagnostic)]
@@ -93,6 +109,8 @@ pub struct UnsafeOpInUnsafeFnAccessToUnionFieldRequiresUnsafe {
 pub struct UnsafeOpInUnsafeFnMutationOfLayoutConstrainedFieldRequiresUnsafe {
     #[label]
     pub span: Span,
+    #[subdiagnostic]
+    pub unsafe_not_inherited_note: Option<UnsafeNotInheritedLintNote>,
 }
 
 #[derive(LintDiagnostic)]
@@ -100,6 +118,8 @@ pub struct UnsafeOpInUnsafeFnMutationOfLayoutConstrainedFieldRequiresUnsafe {
 pub struct UnsafeOpInUnsafeFnBorrowOfLayoutConstrainedFieldRequiresUnsafe {
     #[label]
     pub span: Span,
+    #[subdiagnostic]
+    pub unsafe_not_inherited_note: Option<UnsafeNotInheritedLintNote>,
 }
 
 #[derive(LintDiagnostic)]
@@ -109,6 +129,8 @@ pub struct UnsafeOpInUnsafeFnCallToFunctionWithRequiresUnsafe<'a> {
     #[label]
     pub span: Span,
     pub function: &'a str,
+    #[subdiagnostic]
+    pub unsafe_not_inherited_note: Option<UnsafeNotInheritedLintNote>,
 }
 
 #[derive(Diagnostic)]
@@ -376,6 +398,27 @@ pub struct UnsafeNotInheritedNote {
     pub span: Span,
 }
 
+pub struct UnsafeNotInheritedLintNote {
+    pub signature_span: Span,
+    pub body_span: Span,
+}
+
+impl AddToDiagnostic for UnsafeNotInheritedLintNote {
+    fn add_to_diagnostic_with<F>(self, diag: &mut Diagnostic, _: F)
+    where
+        F: Fn(&mut Diagnostic, SubdiagnosticMessage) -> SubdiagnosticMessage,
+    {
+        diag.span_note(self.signature_span, fluent::mir_build_unsafe_fn_safe_body);
+        let body_start = self.body_span.shrink_to_lo();
+        let body_end = self.body_span.shrink_to_hi();
+        diag.tool_only_multipart_suggestion(
+            fluent::mir_build_wrap_suggestion,
+            vec![(body_start, "{ unsafe ".into()), (body_end, "}".into())],
+            Applicability::MaybeIncorrect,
+        );
+    }
+}
+
 #[derive(LintDiagnostic)]
 #[diag(mir_build_unused_unsafe)]
 pub struct UnusedUnsafe {
diff --git a/compiler/rustc_mir_transform/src/cross_crate_inline.rs b/compiler/rustc_mir_transform/src/cross_crate_inline.rs
index 4d0e261ed1f..261d9dd448d 100644
--- a/compiler/rustc_mir_transform/src/cross_crate_inline.rs
+++ b/compiler/rustc_mir_transform/src/cross_crate_inline.rs
@@ -7,6 +7,7 @@ use rustc_middle::mir::visit::Visitor;
 use rustc_middle::mir::*;
 use rustc_middle::query::Providers;
 use rustc_middle::ty::TyCtxt;
+use rustc_session::config::InliningThreshold;
 use rustc_session::config::OptLevel;
 
 pub fn provide(providers: &mut Providers) {
@@ -54,6 +55,12 @@ fn cross_crate_inlinable(tcx: TyCtxt<'_>, def_id: LocalDefId) -> bool {
         return false;
     }
 
+    let threshold = match tcx.sess.opts.unstable_opts.cross_crate_inline_threshold {
+        InliningThreshold::Always => return true,
+        InliningThreshold::Sometimes(threshold) => threshold,
+        InliningThreshold::Never => return false,
+    };
+
     let mir = tcx.optimized_mir(def_id);
     let mut checker =
         CostChecker { tcx, callee_body: mir, calls: 0, statements: 0, landing_pads: 0, resumes: 0 };
@@ -61,8 +68,7 @@ fn cross_crate_inlinable(tcx: TyCtxt<'_>, def_id: LocalDefId) -> bool {
     checker.calls == 0
         && checker.resumes == 0
         && checker.landing_pads == 0
-        && checker.statements
-            <= tcx.sess.opts.unstable_opts.cross_crate_inline_threshold.unwrap_or(100)
+        && checker.statements <= threshold
 }
 
 struct CostChecker<'b, 'tcx> {
diff --git a/compiler/rustc_parse/messages.ftl b/compiler/rustc_parse/messages.ftl
index e51b672205c..266190da035 100644
--- a/compiler/rustc_parse/messages.ftl
+++ b/compiler/rustc_parse/messages.ftl
@@ -270,6 +270,9 @@ parse_fn_ptr_with_generics = function pointer types may not have generic paramet
         *[false] a
     } `for` parameter list
 
+parse_fn_trait_missing_paren = `Fn` bounds require arguments in parentheses
+    .add_paren = add the missing parentheses
+
 parse_forgot_paren = perhaps you forgot parentheses?
 
 parse_found_expr_would_be_stmt = expected expression, found `{$token}`
diff --git a/compiler/rustc_parse/src/errors.rs b/compiler/rustc_parse/src/errors.rs
index 20b4292701e..8ab1ec298a1 100644
--- a/compiler/rustc_parse/src/errors.rs
+++ b/compiler/rustc_parse/src/errors.rs
@@ -1378,6 +1378,34 @@ pub(crate) struct FnPtrWithGenericsSugg {
     pub for_param_list_exists: bool,
 }
 
+pub(crate) struct FnTraitMissingParen {
+    pub span: Span,
+    pub machine_applicable: bool,
+}
+
+impl AddToDiagnostic for FnTraitMissingParen {
+    fn add_to_diagnostic_with<F>(self, diag: &mut rustc_errors::Diagnostic, _: F)
+    where
+        F: Fn(
+            &mut rustc_errors::Diagnostic,
+            rustc_errors::SubdiagnosticMessage,
+        ) -> rustc_errors::SubdiagnosticMessage,
+    {
+        diag.span_label(self.span, crate::fluent_generated::parse_fn_trait_missing_paren);
+        let applicability = if self.machine_applicable {
+            Applicability::MachineApplicable
+        } else {
+            Applicability::MaybeIncorrect
+        };
+        diag.span_suggestion_short(
+            self.span.shrink_to_hi(),
+            crate::fluent_generated::parse_add_paren,
+            "()",
+            applicability,
+        );
+    }
+}
+
 #[derive(Diagnostic)]
 #[diag(parse_unexpected_if_with_if)]
 pub(crate) struct UnexpectedIfWithIf(
diff --git a/compiler/rustc_parse/src/parser/item.rs b/compiler/rustc_parse/src/parser/item.rs
index 253dd2a3b34..65d41ea19fd 100644
--- a/compiler/rustc_parse/src/parser/item.rs
+++ b/compiler/rustc_parse/src/parser/item.rs
@@ -2278,6 +2278,18 @@ impl<'a> Parser<'a> {
                     err.span_label(ident.span, "while parsing this `fn`");
                     err.emit();
                 } else {
+                    // check for typo'd Fn* trait bounds such as
+                    // fn foo<F>() where F: FnOnce -> () {}
+                    if self.token.kind == token::RArrow {
+                        let machine_applicable = [sym::FnOnce, sym::FnMut, sym::Fn]
+                            .into_iter()
+                            .any(|s| self.prev_token.is_ident_named(s));
+
+                        err.subdiagnostic(errors::FnTraitMissingParen {
+                            span: self.prev_token.span,
+                            machine_applicable,
+                        });
+                    }
                     return Err(err);
                 }
             }
diff --git a/compiler/rustc_resolve/src/diagnostics.rs b/compiler/rustc_resolve/src/diagnostics.rs
index edcc22d56c6..93db6cfc463 100644
--- a/compiler/rustc_resolve/src/diagnostics.rs
+++ b/compiler/rustc_resolve/src/diagnostics.rs
@@ -1545,7 +1545,7 @@ impl<'a, 'tcx> Resolver<'a, 'tcx> {
         let (span, sugg, post) = if let SuggestionTarget::SimilarlyNamed = suggestion.target
             && let Ok(snippet) = self.tcx.sess.source_map().span_to_snippet(span)
             && let Some(span) = suggestion.span
-            && let Some(candidate) = suggestion.candidate.as_str().strip_prefix("_")
+            && let Some(candidate) = suggestion.candidate.as_str().strip_prefix('_')
             && snippet == candidate
         {
             // When the suggested binding change would be from `x` to `_x`, suggest changing the
diff --git a/compiler/rustc_session/src/config.rs b/compiler/rustc_session/src/config.rs
index c94e0d0ed39..f745bc390ca 100644
--- a/compiler/rustc_session/src/config.rs
+++ b/compiler/rustc_session/src/config.rs
@@ -2477,7 +2477,7 @@ pub fn parse_externs(
             let mut error = handler.early_struct_error(format!(
                 "crate name `{name}` passed to `--extern` is not a valid ASCII identifier"
             ));
-            let adjusted_name = name.replace("-", "_");
+            let adjusted_name = name.replace('-', "_");
             if crate::utils::is_ascii_ident(&adjusted_name) {
                 error.help(format!(
                     "consider replacing the dashes with underscores: `{adjusted_name}`"
@@ -3161,10 +3161,10 @@ impl PpMode {
 pub(crate) mod dep_tracking {
     use super::{
         BranchProtection, CFGuard, CFProtection, CrateType, DebugInfo, DebugInfoCompression,
-        ErrorOutputType, InstrumentCoverage, InstrumentXRay, LinkerPluginLto, LocationDetail,
-        LtoCli, OomStrategy, OptLevel, OutFileName, OutputType, OutputTypes, Polonius,
-        RemapPathScopeComponents, ResolveDocLinks, SourceFileHashAlgorithm, SplitDwarfKind,
-        SwitchWithOptPath, SymbolManglingVersion, TraitSolver, TrimmedDefPaths,
+        ErrorOutputType, InliningThreshold, InstrumentCoverage, InstrumentXRay, LinkerPluginLto,
+        LocationDetail, LtoCli, OomStrategy, OptLevel, OutFileName, OutputType, OutputTypes,
+        Polonius, RemapPathScopeComponents, ResolveDocLinks, SourceFileHashAlgorithm,
+        SplitDwarfKind, SwitchWithOptPath, SymbolManglingVersion, TraitSolver, TrimmedDefPaths,
     };
     use crate::lint;
     use crate::options::WasiExecModel;
@@ -3270,6 +3270,7 @@ pub(crate) mod dep_tracking {
         LanguageIdentifier,
         TraitSolver,
         Polonius,
+        InliningThreshold,
     );
 
     impl<T1, T2> DepTrackingHash for (T1, T2)
@@ -3435,3 +3436,16 @@ impl Polonius {
         matches!(self, Polonius::Next)
     }
 }
+
+#[derive(Clone, Copy, PartialEq, Hash, Debug)]
+pub enum InliningThreshold {
+    Always,
+    Sometimes(usize),
+    Never,
+}
+
+impl Default for InliningThreshold {
+    fn default() -> Self {
+        Self::Sometimes(100)
+    }
+}
diff --git a/compiler/rustc_session/src/options.rs b/compiler/rustc_session/src/options.rs
index 7510a41485a..964a26e94fe 100644
--- a/compiler/rustc_session/src/options.rs
+++ b/compiler/rustc_session/src/options.rs
@@ -428,6 +428,8 @@ mod desc {
         "one of supported execution strategies (`same-thread`, or `cross-thread`)";
     pub const parse_dump_solver_proof_tree: &str = "one of: `always`, `on-request`, `on-error`";
     pub const parse_remap_path_scope: &str = "comma separated list of scopes: `macro`, `diagnostics`, `unsplit-debuginfo`, `split-debuginfo`, `split-debuginfo-path`, `object`, `all`";
+    pub const parse_inlining_threshold: &str =
+        "either a boolean (`yes`, `no`, `on`, `off`, etc), or a non-negative number";
 }
 
 mod parse {
@@ -1310,6 +1312,26 @@ mod parse {
         };
         true
     }
+
+    pub(crate) fn parse_inlining_threshold(slot: &mut InliningThreshold, v: Option<&str>) -> bool {
+        match v {
+            Some("always" | "yes") => {
+                *slot = InliningThreshold::Always;
+            }
+            Some("never") => {
+                *slot = InliningThreshold::Never;
+            }
+            Some(v) => {
+                if let Ok(threshold) = v.parse() {
+                    *slot = InliningThreshold::Sometimes(threshold);
+                } else {
+                    return false;
+                }
+            }
+            None => return false,
+        }
+        true
+    }
 }
 
 options! {
@@ -1479,7 +1501,7 @@ options! {
         "combine CGUs into a single one"),
     crate_attr: Vec<String> = (Vec::new(), parse_string_push, [TRACKED],
         "inject the given attribute in the crate"),
-    cross_crate_inline_threshold: Option<usize> = (None, parse_opt_number, [TRACKED],
+    cross_crate_inline_threshold: InliningThreshold = (InliningThreshold::Sometimes(100), parse_inlining_threshold, [TRACKED],
         "threshold to allow cross crate inlining of functions"),
     debug_info_for_profiling: bool = (false, parse_bool, [TRACKED],
         "emit discriminators and other data necessary for AutoFDO"),
diff --git a/compiler/rustc_span/src/symbol.rs b/compiler/rustc_span/src/symbol.rs
index 1a1a1668a3c..f287862cc23 100644
--- a/compiler/rustc_span/src/symbol.rs
+++ b/compiler/rustc_span/src/symbol.rs
@@ -194,6 +194,9 @@ symbols! {
         Error,
         File,
         FileType,
+        Fn,
+        FnMut,
+        FnOnce,
         FormatSpec,
         Formatter,
         From,
diff --git a/compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs b/compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs
index 78ceddcd263..6b09bc89873 100644
--- a/compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs
+++ b/compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs
@@ -28,6 +28,7 @@ use rustc_infer::infer::error_reporting::TypeErrCtxt;
 use rustc_infer::infer::type_variable::{TypeVariableOrigin, TypeVariableOriginKind};
 use rustc_infer::infer::{DefineOpaqueTypes, InferOk, LateBoundRegionConversionTime};
 use rustc_middle::hir::map;
+use rustc_middle::traits::IsConstable;
 use rustc_middle::ty::error::TypeError::{self, Sorts};
 use rustc_middle::ty::{
     self, suggest_arbitrary_trait_bound, suggest_constraining_type_param, AdtKind, GenericArgs,
@@ -2768,20 +2769,30 @@ impl<'tcx> TypeErrCtxtExt<'tcx> for TypeErrCtxt<'_, 'tcx> {
                     ));
                 }
             }
-            ObligationCauseCode::RepeatElementCopy { is_const_fn } => {
+            ObligationCauseCode::RepeatElementCopy { is_constable, elt_type, elt_span, elt_stmt_span } => {
                 err.note(
                     "the `Copy` trait is required because this value will be copied for each element of the array",
                 );
-
-                if is_const_fn {
-                    err.help(
-                        "consider creating a new `const` item and initializing it with the result \
-                        of the function call to be used in the repeat position, like \
-                        `const VAL: Type = const_fn();` and `let x = [VAL; 42];`",
-                    );
+                let value_kind = match is_constable {
+                    IsConstable::Fn => Some("the result of the function call"),
+                    IsConstable::Ctor => Some("the result of the constructor"),
+                    _ => None
+                };
+                let sm = tcx.sess.source_map();
+                if let Some(value_kind) = value_kind &&
+                    let Ok(snip) = sm.span_to_snippet(elt_span)
+                {
+                    let help_msg = format!(
+                        "consider creating a new `const` item and initializing it with {value_kind} \
+                        to be used in the repeat position");
+                    let indentation = sm.indentation_before(elt_stmt_span).unwrap_or_default();
+                    err.multipart_suggestion(help_msg, vec![
+                        (elt_stmt_span.shrink_to_lo(), format!("const ARRAY_REPEAT_VALUE: {elt_type} = {snip};\n{indentation}")),
+                        (elt_span, "ARRAY_REPEAT_VALUE".to_string())
+                    ], Applicability::MachineApplicable);
                 }
 
-                if self.tcx.sess.is_nightly_build() && is_const_fn {
+                if self.tcx.sess.is_nightly_build() && matches!(is_constable, IsConstable::Fn|IsConstable::Ctor) {
                     err.help(
                         "create an inline `const` block, see RFC #2920 \
                          <https://github.com/rust-lang/rfcs/pull/2920> for more information",
diff --git a/config.example.toml b/config.example.toml
index 4984cf8ba1e..e5df28a49af 100644
--- a/config.example.toml
+++ b/config.example.toml
@@ -30,7 +30,7 @@
 #
 # If `change-id` does not match the version that is currently running,
 # `x.py` will prompt you to update it and check the related PR for more details.
-change-id = 117435
+change-id = 116881
 
 # =============================================================================
 # Tweaking how LLVM is compiled
@@ -42,11 +42,15 @@ change-id = 117435
 # Unless you're developing for a target where Rust CI doesn't build a compiler
 # toolchain or changing LLVM locally, you probably want to leave this enabled.
 #
-# All tier 1 targets are currently supported; set this to `"if-available"` if
-# you are not sure whether you're on a tier 1 target.
+# Set this to `"if-available"` if you are not sure whether you're on a tier 1 
+# target. All tier 1 targets are currently supported;
 #
 # We also currently only support this when building LLVM for the build triple.
 #
+# Set this to `"if-unchanged"` to only download if the llvm-project have not 
+# been modified. (If there are no changes or if built from tarball source, 
+# the logic is the same as "if-available")
+#
 # Note that many of the LLVM options are not currently supported for
 # downloading. Currently only the "assertions" option can be toggled.
 #download-ci-llvm = if rust.channel == "dev" { "if-available" } else { false }
diff --git a/library/std/Cargo.toml b/library/std/Cargo.toml
index f3e79b28faf..f666b18887c 100644
--- a/library/std/Cargo.toml
+++ b/library/std/Cargo.toml
@@ -17,7 +17,7 @@ cfg-if = { version = "1.0", features = ['rustc-dep-of-std'] }
 panic_unwind = { path = "../panic_unwind", optional = true }
 panic_abort = { path = "../panic_abort" }
 core = { path = "../core", public = true }
-libc = { version = "0.2.149", default-features = false, features = ['rustc-dep-of-std'], public = true }
+libc = { version = "0.2.150", default-features = false, features = ['rustc-dep-of-std'], public = true }
 compiler_builtins = { version = "0.1.103" }
 profiler_builtins = { path = "../profiler_builtins", optional = true }
 unwind = { path = "../unwind" }
diff --git a/src/bootstrap/defaults/config.codegen.toml b/src/bootstrap/defaults/config.codegen.toml
index 113df88d7c3..7c33ce958c9 100644
--- a/src/bootstrap/defaults/config.codegen.toml
+++ b/src/bootstrap/defaults/config.codegen.toml
@@ -10,7 +10,7 @@ assertions = true
 # enable warnings during the llvm compilation
 enable-warnings = true
 # build llvm from source
-download-ci-llvm = false
+download-ci-llvm = "if-unchanged"
 
 [rust]
 # This enables `RUSTC_LOG=debug`, avoiding confusing situations
diff --git a/src/bootstrap/download-ci-llvm-stamp b/src/bootstrap/download-ci-llvm-stamp
index ffc38057900..9998fe2f5db 100644
--- a/src/bootstrap/download-ci-llvm-stamp
+++ b/src/bootstrap/download-ci-llvm-stamp
@@ -1,4 +1,4 @@
 Change this file to make users of the `download-ci-llvm` configuration download
 a new version of LLVM from CI, even if the LLVM submodule hasn’t changed.
 
-Last change is for: https://github.com/rust-lang/rust/pull/113996
+Last change is for: https://github.com/rust-lang/rust/pull/116881
diff --git a/src/bootstrap/src/core/build_steps/dist.rs b/src/bootstrap/src/core/build_steps/dist.rs
index 6e80c55c8ce..950845b736f 100644
--- a/src/bootstrap/src/core/build_steps/dist.rs
+++ b/src/bootstrap/src/core/build_steps/dist.rs
@@ -2219,23 +2219,19 @@ impl Step for RustDev {
         builder.ensure(crate::core::build_steps::llvm::Lld { target });
 
         let src_bindir = builder.llvm_out(target).join("bin");
-        // If updating this list, you likely want to change
+        // If updating this, you likely want to change
         // src/bootstrap/download-ci-llvm-stamp as well, otherwise local users
         // will not pick up the extra file until LLVM gets bumped.
-        for bin in &[
-            "llvm-config",
-            "llvm-ar",
-            "llvm-objdump",
-            "llvm-profdata",
-            "llvm-bcanalyzer",
-            "llvm-cov",
-            "llvm-dwp",
-            "llvm-nm",
-            "llvm-dwarfdump",
-            "llvm-dis",
-            "llvm-tblgen",
-        ] {
-            tarball.add_file(src_bindir.join(exe(bin, target)), "bin", 0o755);
+        // We should include all the build artifacts obtained from a source build,
+        // so that you can use the downloadable LLVM as if you’ve just run a full source build.
+        if src_bindir.exists() {
+            for entry in walkdir::WalkDir::new(&src_bindir) {
+                let entry = t!(entry);
+                if entry.file_type().is_file() && !entry.path_is_symlink() {
+                    let name = entry.file_name().to_str().unwrap();
+                    tarball.add_file(src_bindir.join(name), "bin", 0o755);
+                }
+            }
         }
 
         // We don't build LLD on some platforms, so only add it if it exists
diff --git a/src/bootstrap/src/core/build_steps/setup.rs b/src/bootstrap/src/core/build_steps/setup.rs
index b4540641bfa..04a16443770 100644
--- a/src/bootstrap/src/core/build_steps/setup.rs
+++ b/src/bootstrap/src/core/build_steps/setup.rs
@@ -147,6 +147,15 @@ impl Step for Profile {
     }
 
     fn run(self, builder: &Builder<'_>) {
+        // During ./x.py setup once you select the codegen profile.
+        // The submodule will be downloaded. It does not work in the
+        // tarball case since they don't include Git and submodules
+        // are already included.
+        if !builder.rust_info().is_from_tarball() {
+            if self == Profile::Codegen {
+                builder.update_submodule(&Path::new("src/llvm-project"));
+            }
+        }
         setup(&builder.build.config, self)
     }
 }
diff --git a/src/bootstrap/src/core/build_steps/test.rs b/src/bootstrap/src/core/build_steps/test.rs
index e2b515a3086..39667d16b7b 100644
--- a/src/bootstrap/src/core/build_steps/test.rs
+++ b/src/bootstrap/src/core/build_steps/test.rs
@@ -1305,6 +1305,47 @@ macro_rules! test_definitions {
     };
 }
 
+/// Declares an alias for running the [`Coverage`] tests in only one mode.
+/// Adapted from [`test_definitions`].
+macro_rules! coverage_test_alias {
+    ($name:ident {
+        alias_and_mode: $alias_and_mode:expr,
+        default: $default:expr,
+        only_hosts: $only_hosts:expr $(,)?
+    }) => {
+        #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
+        pub struct $name {
+            pub compiler: Compiler,
+            pub target: TargetSelection,
+        }
+
+        impl $name {
+            const MODE: &'static str = $alias_and_mode;
+        }
+
+        impl Step for $name {
+            type Output = ();
+            const DEFAULT: bool = $default;
+            const ONLY_HOSTS: bool = $only_hosts;
+
+            fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
+                run.alias($alias_and_mode)
+            }
+
+            fn make_run(run: RunConfig<'_>) {
+                let compiler = run.builder.compiler(run.builder.top_stage, run.build_triple());
+
+                run.builder.ensure($name { compiler, target: run.target });
+            }
+
+            fn run(self, builder: &Builder<'_>) {
+                Coverage { compiler: self.compiler, target: self.target }
+                    .run_unified_suite(builder, Self::MODE)
+            }
+        }
+    };
+}
+
 default_test!(Ui { path: "tests/ui", mode: "ui", suite: "ui" });
 
 default_test!(RunPassValgrind {
@@ -1349,13 +1390,66 @@ host_test!(RunMakeFullDeps {
 
 default_test!(Assembly { path: "tests/assembly", mode: "assembly", suite: "assembly" });
 
-default_test!(CoverageMap {
-    path: "tests/coverage-map",
-    mode: "coverage-map",
-    suite: "coverage-map"
+/// Custom test step that is responsible for running the coverage tests
+/// in multiple different modes.
+///
+/// Each individual mode also has its own alias that will run the tests in
+/// just that mode.
+#[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
+pub struct Coverage {
+    pub compiler: Compiler,
+    pub target: TargetSelection,
+}
+
+impl Coverage {
+    const PATH: &'static str = "tests/coverage";
+    const SUITE: &'static str = "coverage";
+
+    fn run_unified_suite(&self, builder: &Builder<'_>, mode: &'static str) {
+        builder.ensure(Compiletest {
+            compiler: self.compiler,
+            target: self.target,
+            mode,
+            suite: Self::SUITE,
+            path: Self::PATH,
+            compare_mode: None,
+        })
+    }
+}
+
+impl Step for Coverage {
+    type Output = ();
+    const DEFAULT: bool = false;
+    const ONLY_HOSTS: bool = false;
+
+    fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
+        run.suite_path(Self::PATH)
+    }
+
+    fn make_run(run: RunConfig<'_>) {
+        let compiler = run.builder.compiler(run.builder.top_stage, run.build_triple());
+
+        run.builder.ensure(Coverage { compiler, target: run.target });
+    }
+
+    fn run(self, builder: &Builder<'_>) {
+        self.run_unified_suite(builder, CoverageMap::MODE);
+        self.run_unified_suite(builder, RunCoverage::MODE);
+    }
+}
+
+// Aliases for running the coverage tests in only one mode.
+coverage_test_alias!(CoverageMap {
+    alias_and_mode: "coverage-map",
+    default: true,
+    only_hosts: false,
+});
+coverage_test_alias!(RunCoverage {
+    alias_and_mode: "run-coverage",
+    default: true,
+    only_hosts: true,
 });
 
-host_test!(RunCoverage { path: "tests/run-coverage", mode: "run-coverage", suite: "run-coverage" });
 host_test!(RunCoverageRustdoc {
     path: "tests/run-coverage-rustdoc",
     mode: "run-coverage",
diff --git a/src/bootstrap/src/core/builder.rs b/src/bootstrap/src/core/builder.rs
index 44cdbe38de3..38eb4633273 100644
--- a/src/bootstrap/src/core/builder.rs
+++ b/src/bootstrap/src/core/builder.rs
@@ -727,6 +727,7 @@ impl<'a> Builder<'a> {
                 test::Tidy,
                 test::Ui,
                 test::RunPassValgrind,
+                test::Coverage,
                 test::CoverageMap,
                 test::RunCoverage,
                 test::MirOpt,
diff --git a/src/bootstrap/src/core/config/config.rs b/src/bootstrap/src/core/config/config.rs
index a871399453e..2eb5d06bcb3 100644
--- a/src/bootstrap/src/core/config/config.rs
+++ b/src/bootstrap/src/core/config/config.rs
@@ -19,6 +19,7 @@ use std::process::Command;
 use std::str::FromStr;
 
 use crate::core::build_steps::compile::CODEGEN_BACKEND_PREFIX;
+use crate::core::build_steps::llvm;
 use crate::core::config::flags::{Color, Flags, Warnings};
 use crate::utils::cache::{Interned, INTERNER};
 use crate::utils::channel::{self, GitInfo};
@@ -1530,17 +1531,7 @@ impl Config {
             config.llvm_build_config = llvm.build_config.clone().unwrap_or(Default::default());
 
             let asserts = llvm_assertions.unwrap_or(false);
-            config.llvm_from_ci = match llvm.download_ci_llvm {
-                Some(StringOrBool::String(s)) => {
-                    assert_eq!(s, "if-available", "unknown option `{s}` for download-ci-llvm");
-                    crate::core::build_steps::llvm::is_ci_llvm_available(&config, asserts)
-                }
-                Some(StringOrBool::Bool(b)) => b,
-                None => {
-                    config.channel == "dev"
-                        && crate::core::build_steps::llvm::is_ci_llvm_available(&config, asserts)
-                }
-            };
+            config.llvm_from_ci = config.parse_download_ci_llvm(llvm.download_ci_llvm, asserts);
 
             if config.llvm_from_ci {
                 // None of the LLVM options, except assertions, are supported
@@ -2104,6 +2095,94 @@ impl Config {
 
         Some(commit.to_string())
     }
+
+    fn parse_download_ci_llvm(
+        &self,
+        download_ci_llvm: Option<StringOrBool>,
+        asserts: bool,
+    ) -> bool {
+        match download_ci_llvm {
+            None => self.channel == "dev" && llvm::is_ci_llvm_available(&self, asserts),
+            Some(StringOrBool::Bool(b)) => b,
+            Some(StringOrBool::String(s)) if s == "if-available" => {
+                llvm::is_ci_llvm_available(&self, asserts)
+            }
+            Some(StringOrBool::String(s)) if s == "if-unchanged" => {
+                // Git is needed to track modifications here, but tarball source is not available.
+                // If not modified here or built through tarball source, we maintain consistency
+                // with '"if available"'.
+                if !self.rust_info.is_from_tarball()
+                    && self
+                        .last_modified_commit(&["src/llvm-project"], "download-ci-llvm", true)
+                        .is_none()
+                {
+                    // there are some untracked changes in the the given paths.
+                    false
+                } else {
+                    llvm::is_ci_llvm_available(&self, asserts)
+                }
+            }
+            Some(StringOrBool::String(other)) => {
+                panic!("unrecognized option for download-ci-llvm: {:?}", other)
+            }
+        }
+    }
+
+    /// Returns the last commit in which any of `modified_paths` were changed,
+    /// or `None` if there are untracked changes in the working directory and `if_unchanged` is true.
+    pub fn last_modified_commit(
+        &self,
+        modified_paths: &[&str],
+        option_name: &str,
+        if_unchanged: bool,
+    ) -> Option<String> {
+        // Handle running from a directory other than the top level
+        let top_level = output(self.git().args(&["rev-parse", "--show-toplevel"]));
+        let top_level = top_level.trim_end();
+
+        // Look for a version to compare to based on the current commit.
+        // Only commits merged by bors will have CI artifacts.
+        let merge_base = output(
+            self.git()
+                .arg("rev-list")
+                .arg(format!("--author={}", self.stage0_metadata.config.git_merge_commit_email))
+                .args(&["-n1", "--first-parent", "HEAD"]),
+        );
+        let commit = merge_base.trim_end();
+        if commit.is_empty() {
+            println!("error: could not find commit hash for downloading components from CI");
+            println!("help: maybe your repository history is too shallow?");
+            println!("help: consider disabling `{option_name}`");
+            println!("help: or fetch enough history to include one upstream commit");
+            crate::exit!(1);
+        }
+
+        // Warn if there were changes to the compiler or standard library since the ancestor commit.
+        let mut git = self.git();
+        git.args(&["diff-index", "--quiet", &commit, "--"]);
+
+        for path in modified_paths {
+            git.arg(format!("{top_level}/{path}"));
+        }
+
+        let has_changes = !t!(git.status()).success();
+        if has_changes {
+            if if_unchanged {
+                if self.verbose > 0 {
+                    println!(
+                        "warning: saw changes to one of {modified_paths:?} since {commit}; \
+                            ignoring `{option_name}`"
+                    );
+                }
+                return None;
+            }
+            println!(
+                "warning: `{option_name}` is enabled, but there are changes to one of {modified_paths:?}"
+            );
+        }
+
+        Some(commit.to_string())
+    }
 }
 
 fn set<T>(field: &mut T, val: Option<T>) {
diff --git a/src/bootstrap/src/lib.rs b/src/bootstrap/src/lib.rs
index 27922c9fbbe..fc3413a3c81 100644
--- a/src/bootstrap/src/lib.rs
+++ b/src/bootstrap/src/lib.rs
@@ -77,7 +77,7 @@ const LLD_FILE_NAMES: &[&str] = &["ld.lld", "ld64.lld", "lld-link", "wasm-ld"];
 ///
 /// If you make any major changes (such as adding new values or changing default values), please
 /// ensure that the associated PR ID is added to the end of this list.
-pub const CONFIG_CHANGE_HISTORY: &[usize] = &[115898, 116998, 117435];
+pub const CONFIG_CHANGE_HISTORY: &[usize] = &[115898, 116998, 117435, 116881];
 
 /// Extra --check-cfg to add when building
 /// (Mode restriction, config name, config values (if any))
diff --git a/src/ci/docker/host-x86_64/dist-x86_64-linux/build-gcc.sh b/src/ci/docker/host-x86_64/dist-x86_64-linux/build-gcc.sh
index 3b3ec5da74b..e939a5d7eac 100755
--- a/src/ci/docker/host-x86_64/dist-x86_64-linux/build-gcc.sh
+++ b/src/ci/docker/host-x86_64/dist-x86_64-linux/build-gcc.sh
@@ -3,7 +3,8 @@ set -ex
 
 source shared.sh
 
-GCC=8.5.0
+# Note: in the future when bumping to version 10.1.0, also take care of the sed block below.
+GCC=9.5.0
 
 curl https://ftp.gnu.org/gnu/gcc/gcc-$GCC/gcc-$GCC.tar.xz | xzcat | tar xf -
 cd gcc-$GCC
@@ -22,6 +23,11 @@ cd gcc-$GCC
 # latter host is presented to `wget`! Therefore, we choose to download from the insecure HTTP server
 # instead here.
 #
+# Note: in version 10.1.0, the URL used in `download_prerequisites` has changed from using FTP to
+# using HTTP. When bumping to that gcc version, we can likely remove the sed replacement below, or
+# the expression will need to be updated. That new URL is available at:
+# https://github.com/gcc-mirror/gcc/blob/6e6e3f144a33ae504149dc992453b4f6dea12fdb/contrib/download_prerequisites#L35
+#
 sed -i'' 's|ftp://gcc\.gnu\.org/|https://gcc.gnu.org/|g' ./contrib/download_prerequisites
 
 ./contrib/download_prerequisites
diff --git a/src/doc/reference b/src/doc/reference
-Subproject 16fd3c06d9e558dae2d52000818274ae70c9e90
+Subproject cd8193e972f61b92117095fc73b67af767b4d6b
diff --git a/src/doc/rust-by-example b/src/doc/rust-by-example
-Subproject 6709beeb7d0fbc5ffc91ac4893a24434123b9bf
+Subproject 311b84962016b28c75525c86e7b3f49fd9101a3
diff --git a/src/doc/rustc-dev-guide b/src/doc/rustc-dev-guide
-Subproject b0ee9ec8fa59a6c7620165e061f4747202377a6
+Subproject 77dbe5782b2488af3bb489ad702eaff438f465b
diff --git a/src/doc/rustc/src/SUMMARY.md b/src/doc/rustc/src/SUMMARY.md
index 8b4d673d831..1b27b77b3e6 100644
--- a/src/doc/rustc/src/SUMMARY.md
+++ b/src/doc/rustc/src/SUMMARY.md
@@ -41,6 +41,7 @@
     - [mipsel-sony-psx](platform-support/mipsel-sony-psx.md)
     - [mipsisa\*r6\*-unknown-linux-gnu\*](platform-support/mips-release-6.md)
     - [nvptx64-nvidia-cuda](platform-support/nvptx64-nvidia-cuda.md)
+    - [powerpc64-ibm-aix](platform-support/aix.md)
     - [riscv32imac-unknown-xous-elf](platform-support/riscv32imac-unknown-xous-elf.md)
     - [sparc-unknown-none-elf](./platform-support/sparc-unknown-none-elf.md)
     - [*-pc-windows-gnullvm](platform-support/pc-windows-gnullvm.md)
diff --git a/src/doc/rustc/src/platform-support.md b/src/doc/rustc/src/platform-support.md
index 6a979869a59..907e9c59f31 100644
--- a/src/doc/rustc/src/platform-support.md
+++ b/src/doc/rustc/src/platform-support.md
@@ -310,7 +310,7 @@ target | std | host | notes
 `powerpc64-wrs-vxworks` | ? |  |
 `powerpc64le-unknown-linux-musl` | ? |  |
 [`powerpc64-unknown-openbsd`](platform-support/openbsd.md) | ✓ | ✓ | OpenBSD/powerpc64
-`powerpc64-ibm-aix` | ? |  | 64-bit AIX (7.2 and newer)
+[`powerpc64-ibm-aix`](platform-support/aix.md) | ? |  | 64-bit AIX (7.2 and newer)
 `riscv32gc-unknown-linux-gnu` |   |   | RISC-V Linux (kernel 5.4, glibc 2.33)
 `riscv32gc-unknown-linux-musl` |   |   | RISC-V Linux (kernel 5.4, musl + RISCV32 support patches)
 `riscv32im-unknown-none-elf` | * |  | Bare RISC-V (RV32IM ISA)
diff --git a/src/doc/rustc/src/platform-support/aix.md b/src/doc/rustc/src/platform-support/aix.md
new file mode 100644
index 00000000000..c3ce71a1835
--- /dev/null
+++ b/src/doc/rustc/src/platform-support/aix.md
@@ -0,0 +1,26 @@
+# `powerpc64-ibm-aix`
+
+**Tier: 3**
+
+Rust for AIX operating system, currently only 64-bit PowerPC is supported.
+
+## Target maintainers
+
+- QIU Chaofan `qiucofan@cn.ibm.com`, https://github.com/ecnelises
+- Kai LUO, `lkail@cn.ibm.com`, https://github.com/bzEq
+
+## Requirements
+
+This target supports host tools, std and alloc. This target cannot be cross-compiled as for now, mainly because of the unavailability of system linker on other platforms.
+
+Binary built for this target is expected to run on Power7 or newer CPU, and AIX 7.2 or newer version.
+
+Binary format of this platform is [XCOFF](https://www.ibm.com/docs/en/aix/7.2?topic=formats-xcoff-object-file-format). Archive file format is ['AIX big format'](https://www.ibm.com/docs/en/aix/7.2?topic=formats-ar-file-format-big).
+
+## Testing
+
+This target supports running test suites natively, but it's not available to cross-compile and execute in emulator.
+
+## Interoperability with C code
+
+This target supports C code. C code compiled by XL, Open XL and Clang are compatible with Rust. Typical triple of AIX on 64-bit PowerPC of these compilers are also `powerpc64-ibm-aix`.
diff --git a/src/librustdoc/clean/inline.rs b/src/librustdoc/clean/inline.rs
index 013814b1f7d..974ba1e3bd9 100644
--- a/src/librustdoc/clean/inline.rs
+++ b/src/librustdoc/clean/inline.rs
@@ -599,7 +599,7 @@ fn build_module_items(
                 let prim_ty = clean::PrimitiveType::from(p);
                 items.push(clean::Item {
                     name: None,
-                    attrs: Box::new(clean::Attributes::default()),
+                    attrs: Box::default(),
                     // We can use the item's `DefId` directly since the only information ever used
                     // from it is `DefId.krate`.
                     item_id: ItemId::DefId(did),
diff --git a/src/librustdoc/clean/mod.rs b/src/librustdoc/clean/mod.rs
index e6e2d60f2e5..1b7ca7bf7dd 100644
--- a/src/librustdoc/clean/mod.rs
+++ b/src/librustdoc/clean/mod.rs
@@ -2534,7 +2534,8 @@ fn clean_generic_args<'tcx>(
                     }
                     hir::GenericArg::Lifetime(_) => GenericArg::Lifetime(Lifetime::elided()),
                     hir::GenericArg::Type(ty) => GenericArg::Type(clean_ty(ty, cx)),
-                    // FIXME(effects): This will still emit `<true>` for non-const impls of const traits
+                    // Checking for `#[rustc_host]` on the `AnonConst`  not only accounts for the case
+                    // where the argument is `host` but for all possible cases (e.g., `true`, `false`).
                     hir::GenericArg::Const(ct)
                         if cx.tcx.has_attr(ct.value.def_id, sym::rustc_host) =>
                     {
diff --git a/src/librustdoc/clean/types.rs b/src/librustdoc/clean/types.rs
index a718cb37d89..88ee4e3a2ab 100644
--- a/src/librustdoc/clean/types.rs
+++ b/src/librustdoc/clean/types.rs
@@ -1327,6 +1327,7 @@ impl WherePredicate {
 pub(crate) enum GenericParamDefKind {
     Lifetime { outlives: ThinVec<Lifetime> },
     Type { did: DefId, bounds: ThinVec<GenericBound>, default: Option<Box<Type>>, synthetic: bool },
+    // Option<Box<String>> makes this type smaller than `Option<String>` would.
     Const { ty: Box<Type>, default: Option<Box<String>>, is_host_effect: bool },
 }
 
diff --git a/src/librustdoc/clean/utils.rs b/src/librustdoc/clean/utils.rs
index dea7bfaf7e2..9ff00c1946f 100644
--- a/src/librustdoc/clean/utils.rs
+++ b/src/librustdoc/clean/utils.rs
@@ -124,11 +124,7 @@ pub(crate) fn ty_args_to_args<'tcx>(
             )))
         }
         GenericArgKind::Const(ct) => {
-            // FIXME(effects): this relies on the host effect being called `host`, which users could also name
-            // their const generics.
-            // FIXME(effects): this causes `host = true` and `host = false` generics to also be emitted.
-            if let ty::ConstKind::Param(p) = ct.kind()
-                && p.name == sym::host
+            if let ty::GenericParamDefKind::Const { is_host_effect: true, .. } = params[index].kind
             {
                 return None;
             }
@@ -588,7 +584,7 @@ pub(crate) fn has_doc_flag(tcx: TyCtxt<'_>, did: DefId, flag: Symbol) -> bool {
 /// Set by `bootstrap::Builder::doc_rust_lang_org_channel` in order to keep tests passing on beta/stable.
 pub(crate) const DOC_RUST_LANG_ORG_CHANNEL: &str = env!("DOC_RUST_LANG_ORG_CHANNEL");
 pub(crate) static DOC_CHANNEL: Lazy<&'static str> =
-    Lazy::new(|| DOC_RUST_LANG_ORG_CHANNEL.rsplit("/").filter(|c| !c.is_empty()).next().unwrap());
+    Lazy::new(|| DOC_RUST_LANG_ORG_CHANNEL.rsplit('/').filter(|c| !c.is_empty()).next().unwrap());
 
 /// Render a sequence of macro arms in a format suitable for displaying to the user
 /// as part of an item declaration.
diff --git a/src/librustdoc/html/render/write_shared.rs b/src/librustdoc/html/render/write_shared.rs
index 3e58dd96ed9..d2c7c578c08 100644
--- a/src/librustdoc/html/render/write_shared.rs
+++ b/src/librustdoc/html/render/write_shared.rs
@@ -356,15 +356,12 @@ if (typeof exports !== 'undefined') {exports.searchIndex = searchIndex};
 
             let content = format!(
                 "<h1>List of all crates</h1><ul class=\"all-items\">{}</ul>",
-                krates
-                    .iter()
-                    .map(|s| {
-                        format!(
-                            "<li><a href=\"{trailing_slash}index.html\">{s}</a></li>",
-                            trailing_slash = ensure_trailing_slash(s),
-                        )
-                    })
-                    .collect::<String>()
+                krates.iter().format_with("", |k, f| {
+                    f(&format_args!(
+                        "<li><a href=\"{trailing_slash}index.html\">{k}</a></li>",
+                        trailing_slash = ensure_trailing_slash(k),
+                    ))
+                })
             );
             let v = layout::render(&shared.layout, &page, "", content, &shared.style_files);
             shared.fs.write(dst, v)?;
diff --git a/src/librustdoc/html/templates/page.html b/src/librustdoc/html/templates/page.html
index ebf817673bf..3f6147bb916 100644
--- a/src/librustdoc/html/templates/page.html
+++ b/src/librustdoc/html/templates/page.html
@@ -10,7 +10,6 @@
     <link rel="preload" as="font" type="font/woff2" crossorigin href="{{static_root_path|safe}}{{files.fira_sans_regular}}"> {# #}
     <link rel="preload" as="font" type="font/woff2" crossorigin href="{{static_root_path|safe}}{{files.fira_sans_medium}}"> {# #}
     <link rel="preload" as="font" type="font/woff2" crossorigin href="{{static_root_path|safe}}{{files.source_code_pro_regular}}"> {# #}
-    <link rel="preload" as="font" type="font/woff2" crossorigin href="{{static_root_path|safe}}{{files.source_serif_4_bold}}"> {# #}
     <link rel="preload" as="font" type="font/woff2" crossorigin href="{{static_root_path|safe}}{{files.source_code_pro_semibold}}"> {# #}
     <link rel="stylesheet" {#+ #}
           href="{{static_root_path|safe}}{{files.normalize_css}}"> {# #}
diff --git a/src/librustdoc/passes/lint/redundant_explicit_links.rs b/src/librustdoc/passes/lint/redundant_explicit_links.rs
index 0c15bf5f764..472781e7d22 100644
--- a/src/librustdoc/passes/lint/redundant_explicit_links.rs
+++ b/src/librustdoc/passes/lint/redundant_explicit_links.rs
@@ -87,7 +87,7 @@ fn check_redundant_explicit_link<'md>(
                 let link_data = collect_link_data(&mut offset_iter);
 
                 if let Some(resolvable_link) = link_data.resolvable_link.as_ref() {
-                    if &link_data.display_link.replace("`", "") != resolvable_link {
+                    if &link_data.display_link.replace('`', "") != resolvable_link {
                         // Skips if display link does not match to actual
                         // resolvable link, usually happens if display link
                         // has several segments, e.g.
diff --git a/src/tools/cargo b/src/tools/cargo
-Subproject 65e297d1ec0dee1a74800efe600b8dc163bcf5d
+Subproject 7046d992f9f32ba209a8079f662ebccf9da8de2
diff --git a/src/tools/compiletest/src/common.rs b/src/tools/compiletest/src/common.rs
index 0e1bf0c6c2d..a908218fff1 100644
--- a/src/tools/compiletest/src/common.rs
+++ b/src/tools/compiletest/src/common.rs
@@ -78,7 +78,7 @@ impl Default for Mode {
 }
 
 impl Mode {
-    pub fn disambiguator(self) -> &'static str {
+    pub fn aux_dir_disambiguator(self) -> &'static str {
         // Pretty-printing tests could run concurrently, and if they do,
         // they need to keep their output segregated.
         match self {
@@ -86,6 +86,15 @@ impl Mode {
             _ => "",
         }
     }
+
+    pub fn output_dir_disambiguator(self) -> &'static str {
+        // Coverage tests use the same test files for multiple test modes,
+        // so each mode should have a separate output directory.
+        match self {
+            CoverageMap | RunCoverage => self.to_str(),
+            _ => "",
+        }
+    }
 }
 
 string_enum! {
@@ -699,6 +708,7 @@ pub fn output_testname_unique(
     let mode = config.compare_mode.as_ref().map_or("", |m| m.to_str());
     let debugger = config.debugger.as_ref().map_or("", |m| m.to_str());
     PathBuf::from(&testpaths.file.file_stem().unwrap())
+        .with_extra_extension(config.mode.output_dir_disambiguator())
         .with_extra_extension(revision.unwrap_or(""))
         .with_extra_extension(mode)
         .with_extra_extension(debugger)
diff --git a/src/tools/compiletest/src/runtest.rs b/src/tools/compiletest/src/runtest.rs
index e74d66a8599..cbcd3dc2fde 100644
--- a/src/tools/compiletest/src/runtest.rs
+++ b/src/tools/compiletest/src/runtest.rs
@@ -2193,7 +2193,7 @@ impl<'test> TestCx<'test> {
             || self.is_vxworks_pure_static()
             || self.config.target.contains("bpf")
             || !self.config.target_cfg().dynamic_linking
-            || self.config.mode == RunCoverage
+            || matches!(self.config.mode, CoverageMap | RunCoverage)
         {
             // We primarily compile all auxiliary libraries as dynamic libraries
             // to avoid code size bloat and large binaries as much as possible
@@ -2481,9 +2481,9 @@ impl<'test> TestCx<'test> {
             RunCoverage => {
                 rustc.arg("-Cinstrument-coverage");
                 // Coverage reports are sometimes sensitive to optimizations,
-                // and the current snapshots assume no optimization unless
+                // and the current snapshots assume `opt-level=2` unless
                 // overridden by `compile-flags`.
-                rustc.arg("-Copt-level=0");
+                rustc.arg("-Copt-level=2");
             }
             RunPassValgrind | Pretty | DebugInfo | Codegen | Rustdoc | RustdocJson | RunMake
             | CodegenUnits | JsDocTest | Assembly => {
@@ -2720,7 +2720,7 @@ impl<'test> TestCx<'test> {
     fn aux_output_dir_name(&self) -> PathBuf {
         self.output_base_dir()
             .join("auxiliary")
-            .with_extra_extension(self.config.mode.disambiguator())
+            .with_extra_extension(self.config.mode.aux_dir_disambiguator())
     }
 
     /// Generates a unique name for the test, such as `testname.revision.mode`.
@@ -3962,7 +3962,7 @@ impl<'test> TestCx<'test> {
             // And finally, compile the fixed code and make sure it both
             // succeeds and has no diagnostics.
             let rustc = self.make_compile_args(
-                &self.testpaths.file.with_extension(UI_FIXED),
+                &self.expected_output_path(UI_FIXED),
                 TargetLocation::ThisFile(self.make_exe_name()),
                 emit_metadata,
                 AllowUnused::No,
diff --git a/tests/codegen/cross-crate-inlining/always-inline.rs b/tests/codegen/cross-crate-inlining/always-inline.rs
new file mode 100644
index 00000000000..f3f08bf116a
--- /dev/null
+++ b/tests/codegen/cross-crate-inlining/always-inline.rs
@@ -0,0 +1,13 @@
+// compile-flags: -O
+// aux-build:always.rs
+
+#![crate_type = "lib"]
+
+extern crate always;
+
+// Check that we inline a cross-crate call, even though it isn't a leaf
+#[no_mangle]
+pub fn outer() -> String {
+    // CHECK-NOT: call {{.*}}stem_fn
+    always::stem_fn()
+}
diff --git a/tests/codegen/cross-crate-inlining/auxiliary/always.rs b/tests/codegen/cross-crate-inlining/auxiliary/always.rs
new file mode 100644
index 00000000000..3670307ec81
--- /dev/null
+++ b/tests/codegen/cross-crate-inlining/auxiliary/always.rs
@@ -0,0 +1,20 @@
+// compile-flags: -O -Zcross-crate-inline-threshold=always
+
+#![crate_type = "lib"]
+
+// This function *looks* like it contains a call, but that call will be optimized out by MIR
+// optimizations.
+pub fn leaf_fn() -> String {
+    String::new()
+}
+
+// This function contains a call, even after MIR optimizations. It is only eligible for
+// cross-crate-inlining with "always".
+pub fn stem_fn() -> String {
+    inner()
+}
+
+#[inline(never)]
+fn inner() -> String {
+    String::from("test")
+}
diff --git a/tests/codegen/cross-crate-inlining/auxiliary/leaf.rs b/tests/codegen/cross-crate-inlining/auxiliary/leaf.rs
new file mode 100644
index 00000000000..963f087f22d
--- /dev/null
+++ b/tests/codegen/cross-crate-inlining/auxiliary/leaf.rs
@@ -0,0 +1,20 @@
+// compile-flags: -O
+
+#![crate_type = "lib"]
+
+// This function *looks* like it contains a call, but that call will be optimized out by MIR
+// optimizations.
+pub fn leaf_fn() -> String {
+    String::new()
+}
+
+// This function contains a call, even after MIR optimizations. It is only eligible for
+// cross-crate-inlining with "always".
+pub fn stem_fn() -> String {
+    inner()
+}
+
+#[inline(never)]
+fn inner() -> String {
+    String::from("test")
+}
diff --git a/tests/codegen/cross-crate-inlining/auxiliary/never.rs b/tests/codegen/cross-crate-inlining/auxiliary/never.rs
new file mode 100644
index 00000000000..e222a6dea38
--- /dev/null
+++ b/tests/codegen/cross-crate-inlining/auxiliary/never.rs
@@ -0,0 +1,20 @@
+// compile-flags: -O -Zcross-crate-inline-threshold=never
+
+#![crate_type = "lib"]
+
+// This function *looks* like it contains a call, but that call will be optimized out by MIR
+// optimizations.
+pub fn leaf_fn() -> String {
+    String::new()
+}
+
+// This function contains a call, even after MIR optimizations. It is only eligible for
+// cross-crate-inlining with "always".
+pub fn stem_fn() -> String {
+    inner()
+}
+
+#[inline(never)]
+fn inner() -> String {
+    String::from("test")
+}
diff --git a/tests/codegen/cross-crate-inlining/leaf-inlining.rs b/tests/codegen/cross-crate-inlining/leaf-inlining.rs
new file mode 100644
index 00000000000..73b1a520b06
--- /dev/null
+++ b/tests/codegen/cross-crate-inlining/leaf-inlining.rs
@@ -0,0 +1,20 @@
+// compile-flags: -O -Zcross-crate-inline-threshold=yes
+// aux-build:leaf.rs
+
+#![crate_type = "lib"]
+
+extern crate leaf;
+
+// Check that we inline a leaf cross-crate call
+#[no_mangle]
+pub fn leaf_outer() -> String {
+    // CHECK-NOT: call {{.*}}leaf_fn
+    leaf::leaf_fn()
+}
+
+// Check that we do not inline a non-leaf cross-crate call
+#[no_mangle]
+pub fn stem_outer() -> String {
+    // CHECK: call {{.*}}stem_fn
+    leaf::stem_fn()
+}
diff --git a/tests/codegen/cross-crate-inlining/never-inline.rs b/tests/codegen/cross-crate-inlining/never-inline.rs
new file mode 100644
index 00000000000..4e7bc3e5154
--- /dev/null
+++ b/tests/codegen/cross-crate-inlining/never-inline.rs
@@ -0,0 +1,13 @@
+// compile-flags: -O
+// aux-build:never.rs
+
+#![crate_type = "lib"]
+
+extern crate never;
+
+// Check that we do not inline a cross-crate call, even though it is a leaf
+#[no_mangle]
+pub fn outer() -> String {
+    // CHECK: call {{.*}}leaf_fn
+    never::leaf_fn()
+}
diff --git a/tests/coverage-map/README.md b/tests/coverage-map/README.md
deleted file mode 100644
index 60d1352cd64..00000000000
--- a/tests/coverage-map/README.md
+++ /dev/null
@@ -1,13 +0,0 @@
-The tests in `./status-quo` were copied from `tests/run-coverage` in order to
-capture the current behavior of the instrumentor on non-trivial programs.
-The actual mappings have not been closely inspected.
-
-## Maintenance note
-
-These tests can be sensitive to small changes in MIR spans or MIR control flow,
-especially in HIR-to-MIR lowering or MIR optimizations.
-
-If you haven't touched the coverage code directly, and the `run-coverage` test
-suite still works, then it should usually be OK to just `--bless` these
-coverage mapping tests as necessary, without worrying too much about the exact
-changes.
diff --git a/tests/coverage-map/if.cov-map b/tests/coverage-map/if.cov-map
deleted file mode 100644
index 3cedb5ffbec..00000000000
--- a/tests/coverage-map/if.cov-map
+++ /dev/null
@@ -1,15 +0,0 @@
-Function name: if::main
-Raw bytes (28): 0x[01, 01, 02, 01, 05, 05, 02, 04, 01, 03, 01, 02, 0c, 05, 02, 0d, 02, 06, 02, 02, 06, 00, 07, 07, 01, 05, 01, 02]
-Number of files: 1
-- file 0 => global file 1
-Number of expressions: 2
-- expression 0 operands: lhs = Counter(0), rhs = Counter(1)
-- expression 1 operands: lhs = Counter(1), rhs = Expression(0, Sub)
-Number of file 0 mappings: 4
-- Code(Counter(0)) at (prev + 3, 1) to (start + 2, 12)
-- Code(Counter(1)) at (prev + 2, 13) to (start + 2, 6)
-- Code(Expression(0, Sub)) at (prev + 2, 6) to (start + 0, 7)
-    = (c0 - c1)
-- Code(Expression(1, Add)) at (prev + 1, 5) to (start + 1, 2)
-    = (c1 + (c0 - c1))
-
diff --git a/tests/coverage-map/if.rs b/tests/coverage-map/if.rs
deleted file mode 100644
index ed3f69bdc98..00000000000
--- a/tests/coverage-map/if.rs
+++ /dev/null
@@ -1,9 +0,0 @@
-// compile-flags: --edition=2021
-
-fn main() {
-    let cond = std::env::args().len() == 1;
-    if cond {
-        println!("true");
-    }
-    println!("done");
-}
diff --git a/tests/coverage-map/status-quo/overflow.rs b/tests/coverage-map/status-quo/overflow.rs
deleted file mode 100644
index bbb65c1b35d..00000000000
--- a/tests/coverage-map/status-quo/overflow.rs
+++ /dev/null
@@ -1,63 +0,0 @@
-#![allow(unused_assignments)]
-// failure-status: 101
-
-fn might_overflow(to_add: u32) -> u32 {
-    if to_add > 5 {
-        println!("this will probably overflow");
-    }
-    let add_to = u32::MAX - 5;
-    println!("does {} + {} overflow?", add_to, to_add);
-    let result = to_add + add_to;
-    println!("continuing after overflow check");
-    result
-}
-
-fn main() -> Result<(), u8> {
-    let mut countdown = 10;
-    while countdown > 0 {
-        if countdown == 1 {
-            let result = might_overflow(10);
-            println!("Result: {}", result);
-        } else if countdown < 5 {
-            let result = might_overflow(1);
-            println!("Result: {}", result);
-        }
-        countdown -= 1;
-    }
-    Ok(())
-}
-
-// Notes:
-//   1. Compare this program and its coverage results to those of the very similar test `assert.rs`,
-//      and similar tests `panic_unwind.rs`, abort.rs` and `try_error_result.rs`.
-//   2. This test confirms the coverage generated when a program passes or fails a
-//      compiler-generated `TerminatorKind::Assert` (based on an overflow check, in this case).
-//   3. Similar to how the coverage instrumentation handles `TerminatorKind::Call`,
-//      compiler-generated assertion failures are assumed to be a symptom of a program bug, not
-//      expected behavior. To simplify the coverage graphs and keep instrumented programs as
-//      small and fast as possible, `Assert` terminators are assumed to always succeed, and
-//      therefore are considered "non-branching" terminators. So, an `Assert` terminator does not
-//      get its own coverage counter.
-//   4. After an unhandled panic or failed Assert, coverage results may not always be intuitive.
-//      In this test, the final count for the statements after the `if` block in `might_overflow()`
-//      is 4, even though the lines after `to_add + add_to` were executed only 3 times. Depending
-//      on the MIR graph and the structure of the code, this count could have been 3 (which might
-//      have been valid for the overflowed add `+`, but should have been 4 for the lines before
-//      the overflow. The reason for this potential uncertainty is, a `CounterKind` is incremented
-//      via StatementKind::Counter at the end of the block, but (as in the case in this test),
-//      a CounterKind::Expression is always evaluated. In this case, the expression was based on
-//      a `Counter` incremented as part of the evaluation of the `if` expression, which was
-//      executed, and counted, 4 times, before reaching the overflow add.
-
-// If the program did not overflow, the coverage for `might_overflow()` would look like this:
-//
-//     4|       |fn might_overflow(to_add: u32) -> u32 {
-//     5|      4|    if to_add > 5 {
-//     6|      0|        println!("this will probably overflow");
-//     7|      4|    }
-//     8|      4|    let add_to = u32::MAX - 5;
-//     9|      4|    println!("does {} + {} overflow?", add_to, to_add);
-//    10|      4|    let result = to_add + add_to;
-//    11|      4|    println!("continuing after overflow check");
-//    12|      4|    result
-//    13|      4|}
diff --git a/tests/coverage-map/status-quo/sort_groups.rs b/tests/coverage-map/status-quo/sort_groups.rs
deleted file mode 100644
index f89f9f3ec61..00000000000
--- a/tests/coverage-map/status-quo/sort_groups.rs
+++ /dev/null
@@ -1,23 +0,0 @@
-// compile-flags: --edition=2021
-
-// Demonstrate that `sort_subviews.py` can sort instantiation groups into a
-// predictable order, while preserving their heterogeneous contents.
-
-fn main() {
-    let cond = std::env::args().len() > 1;
-    generic_fn::<()>(cond);
-    generic_fn::<&'static str>(!cond);
-    if false {
-        generic_fn::<char>(cond);
-    }
-    generic_fn::<i32>(cond);
-    other_fn();
-}
-
-fn generic_fn<T>(cond: bool) {
-    if cond {
-        println!("{}", std::any::type_name::<T>());
-    }
-}
-
-fn other_fn() {}
diff --git a/tests/coverage/README.md b/tests/coverage/README.md
new file mode 100644
index 00000000000..f1e403c65e3
--- /dev/null
+++ b/tests/coverage/README.md
@@ -0,0 +1,16 @@
+The tests in this directory are shared by two different test modes, and can be
+run in multiple different ways:
+
+- `./x.py test coverage-map` (compiles to LLVM IR and checks coverage mappings)
+- `./x.py test run-coverage` (runs a test binary and checks its coverage report)
+- `./x.py test coverage` (runs both `coverage-map` and `run-coverage`)
+
+## Maintenance note
+
+These tests can be sensitive to small changes in MIR spans or MIR control flow,
+especially in HIR-to-MIR lowering or MIR optimizations.
+
+If you haven't touched the coverage code directly, and the tests still pass in
+`run-coverage` mode, then it should usually be OK to just re-bless the mappings
+as necessary with `./x.py test coverage-map --bless`, without worrying too much
+about the exact changes.
diff --git a/tests/coverage-map/status-quo/abort.cov-map b/tests/coverage/abort.cov-map
index 45d3795eff8..45d3795eff8 100644
--- a/tests/coverage-map/status-quo/abort.cov-map
+++ b/tests/coverage/abort.cov-map
diff --git a/tests/run-coverage/abort.coverage b/tests/coverage/abort.coverage
index ceef6386780..ceef6386780 100644
--- a/tests/run-coverage/abort.coverage
+++ b/tests/coverage/abort.coverage
diff --git a/tests/coverage-map/status-quo/abort.rs b/tests/coverage/abort.rs
index 98264bdc1af..98264bdc1af 100644
--- a/tests/coverage-map/status-quo/abort.rs
+++ b/tests/coverage/abort.rs
diff --git a/tests/coverage-map/status-quo/assert.cov-map b/tests/coverage/assert.cov-map
index dd413123de7..dd413123de7 100644
--- a/tests/coverage-map/status-quo/assert.cov-map
+++ b/tests/coverage/assert.cov-map
diff --git a/tests/run-coverage/assert.coverage b/tests/coverage/assert.coverage
index 8b997724c4a..8b997724c4a 100644
--- a/tests/run-coverage/assert.coverage
+++ b/tests/coverage/assert.coverage
diff --git a/tests/coverage-map/status-quo/assert.rs b/tests/coverage/assert.rs
index 85e6662a6ad..85e6662a6ad 100644
--- a/tests/coverage-map/status-quo/assert.rs
+++ b/tests/coverage/assert.rs
diff --git a/tests/coverage-map/status-quo/async.cov-map b/tests/coverage/async.cov-map
index 598791537ad..598791537ad 100644
--- a/tests/coverage-map/status-quo/async.cov-map
+++ b/tests/coverage/async.cov-map
diff --git a/tests/run-coverage/async.coverage b/tests/coverage/async.coverage
index 07bc16c2d92..07bc16c2d92 100644
--- a/tests/run-coverage/async.coverage
+++ b/tests/coverage/async.coverage
diff --git a/tests/coverage-map/status-quo/async.rs b/tests/coverage/async.rs
index efd9e62d64e..efd9e62d64e 100644
--- a/tests/coverage-map/status-quo/async.rs
+++ b/tests/coverage/async.rs
diff --git a/tests/coverage-map/status-quo/async2.cov-map b/tests/coverage/async2.cov-map
index cc7aed9aee3..cc7aed9aee3 100644
--- a/tests/coverage-map/status-quo/async2.cov-map
+++ b/tests/coverage/async2.cov-map
diff --git a/tests/run-coverage/async2.coverage b/tests/coverage/async2.coverage
index fcb0a3aed64..fcb0a3aed64 100644
--- a/tests/run-coverage/async2.coverage
+++ b/tests/coverage/async2.coverage
diff --git a/tests/coverage-map/status-quo/async2.rs b/tests/coverage/async2.rs
index 2884ff297af..2884ff297af 100644
--- a/tests/coverage-map/status-quo/async2.rs
+++ b/tests/coverage/async2.rs
diff --git a/tests/run-coverage/auxiliary/inline_always_with_dead_code.rs b/tests/coverage/auxiliary/inline_always_with_dead_code.rs
index 9dc50dae25a..9dc50dae25a 100644
--- a/tests/run-coverage/auxiliary/inline_always_with_dead_code.rs
+++ b/tests/coverage/auxiliary/inline_always_with_dead_code.rs
diff --git a/tests/run-coverage/auxiliary/unused_mod_helper.rs b/tests/coverage/auxiliary/unused_mod_helper.rs
index 88c5dac65cb..88c5dac65cb 100644
--- a/tests/run-coverage/auxiliary/unused_mod_helper.rs
+++ b/tests/coverage/auxiliary/unused_mod_helper.rs
diff --git a/tests/run-coverage/auxiliary/used_crate.rs b/tests/coverage/auxiliary/used_crate.rs
index c086ef21e1a..c086ef21e1a 100644
--- a/tests/run-coverage/auxiliary/used_crate.rs
+++ b/tests/coverage/auxiliary/used_crate.rs
diff --git a/tests/run-coverage/auxiliary/used_inline_crate.rs b/tests/coverage/auxiliary/used_inline_crate.rs
index e8929de6b36..e8929de6b36 100644
--- a/tests/run-coverage/auxiliary/used_inline_crate.rs
+++ b/tests/coverage/auxiliary/used_inline_crate.rs
diff --git a/tests/coverage-map/status-quo/bad_counter_ids.cov-map b/tests/coverage/bad_counter_ids.cov-map
index 0b8081acfa6..0b8081acfa6 100644
--- a/tests/coverage-map/status-quo/bad_counter_ids.cov-map
+++ b/tests/coverage/bad_counter_ids.cov-map
diff --git a/tests/run-coverage/bad_counter_ids.coverage b/tests/coverage/bad_counter_ids.coverage
index d69ebf160ea..d69ebf160ea 100644
--- a/tests/run-coverage/bad_counter_ids.coverage
+++ b/tests/coverage/bad_counter_ids.coverage
diff --git a/tests/coverage-map/status-quo/bad_counter_ids.rs b/tests/coverage/bad_counter_ids.rs
index ef5460102b7..ef5460102b7 100644
--- a/tests/coverage-map/status-quo/bad_counter_ids.rs
+++ b/tests/coverage/bad_counter_ids.rs
diff --git a/tests/coverage-map/status-quo/closure.cov-map b/tests/coverage/closure.cov-map
index 522c1e73afe..522c1e73afe 100644
--- a/tests/coverage-map/status-quo/closure.cov-map
+++ b/tests/coverage/closure.cov-map
diff --git a/tests/run-coverage/closure.coverage b/tests/coverage/closure.coverage
index 67014f792c8..67014f792c8 100644
--- a/tests/run-coverage/closure.coverage
+++ b/tests/coverage/closure.coverage
diff --git a/tests/coverage-map/status-quo/closure.rs b/tests/coverage/closure.rs
index 16a2c4e33bd..16a2c4e33bd 100644
--- a/tests/coverage-map/status-quo/closure.rs
+++ b/tests/coverage/closure.rs
diff --git a/tests/coverage-map/status-quo/closure_bug.cov-map b/tests/coverage/closure_bug.cov-map
index 90eeb1a6686..90eeb1a6686 100644
--- a/tests/coverage-map/status-quo/closure_bug.cov-map
+++ b/tests/coverage/closure_bug.cov-map
diff --git a/tests/run-coverage/closure_bug.coverage b/tests/coverage/closure_bug.coverage
index f3299834bce..f3299834bce 100644
--- a/tests/run-coverage/closure_bug.coverage
+++ b/tests/coverage/closure_bug.coverage
diff --git a/tests/coverage-map/status-quo/closure_bug.rs b/tests/coverage/closure_bug.rs
index 739bc5f0b51..739bc5f0b51 100644
--- a/tests/coverage-map/status-quo/closure_bug.rs
+++ b/tests/coverage/closure_bug.rs
diff --git a/tests/coverage-map/status-quo/closure_macro.cov-map b/tests/coverage/closure_macro.cov-map
index b02c7e2e4c6..b02c7e2e4c6 100644
--- a/tests/coverage-map/status-quo/closure_macro.cov-map
+++ b/tests/coverage/closure_macro.cov-map
diff --git a/tests/run-coverage/closure_macro.coverage b/tests/coverage/closure_macro.coverage
index 0f2c917e090..0f2c917e090 100644
--- a/tests/run-coverage/closure_macro.coverage
+++ b/tests/coverage/closure_macro.coverage
diff --git a/tests/coverage-map/status-quo/closure_macro.rs b/tests/coverage/closure_macro.rs
index 9b289141c2e..9b289141c2e 100644
--- a/tests/coverage-map/status-quo/closure_macro.rs
+++ b/tests/coverage/closure_macro.rs
diff --git a/tests/coverage-map/status-quo/closure_macro_async.cov-map b/tests/coverage/closure_macro_async.cov-map
index 7f8666948d9..7f8666948d9 100644
--- a/tests/coverage-map/status-quo/closure_macro_async.cov-map
+++ b/tests/coverage/closure_macro_async.cov-map
diff --git a/tests/run-coverage/closure_macro_async.coverage b/tests/coverage/closure_macro_async.coverage
index 74247f1bc6f..74247f1bc6f 100644
--- a/tests/run-coverage/closure_macro_async.coverage
+++ b/tests/coverage/closure_macro_async.coverage
diff --git a/tests/coverage-map/status-quo/closure_macro_async.rs b/tests/coverage/closure_macro_async.rs
index b4275599e59..b4275599e59 100644
--- a/tests/coverage-map/status-quo/closure_macro_async.rs
+++ b/tests/coverage/closure_macro_async.rs
diff --git a/tests/coverage-map/status-quo/conditions.cov-map b/tests/coverage/conditions.cov-map
index 7600d2d96bd..7600d2d96bd 100644
--- a/tests/coverage-map/status-quo/conditions.cov-map
+++ b/tests/coverage/conditions.cov-map
diff --git a/tests/run-coverage/conditions.coverage b/tests/coverage/conditions.coverage
index 473335ff641..473335ff641 100644
--- a/tests/run-coverage/conditions.coverage
+++ b/tests/coverage/conditions.coverage
diff --git a/tests/coverage-map/status-quo/conditions.rs b/tests/coverage/conditions.rs
index fa7f2a116c2..fa7f2a116c2 100644
--- a/tests/coverage-map/status-quo/conditions.rs
+++ b/tests/coverage/conditions.rs
diff --git a/tests/coverage-map/status-quo/continue.cov-map b/tests/coverage/continue.cov-map
index 82f3d7c6095..82f3d7c6095 100644
--- a/tests/coverage-map/status-quo/continue.cov-map
+++ b/tests/coverage/continue.cov-map
diff --git a/tests/run-coverage/continue.coverage b/tests/coverage/continue.coverage
index 4916cac0038..4916cac0038 100644
--- a/tests/run-coverage/continue.coverage
+++ b/tests/coverage/continue.coverage
diff --git a/tests/coverage-map/status-quo/continue.rs b/tests/coverage/continue.rs
index 624aa98341b..624aa98341b 100644
--- a/tests/coverage-map/status-quo/continue.rs
+++ b/tests/coverage/continue.rs
diff --git a/tests/coverage-map/status-quo/coroutine.cov-map b/tests/coverage/coroutine.cov-map
index 2f4936d9ab8..2f4936d9ab8 100644
--- a/tests/coverage-map/status-quo/coroutine.cov-map
+++ b/tests/coverage/coroutine.cov-map
diff --git a/tests/run-coverage/coroutine.coverage b/tests/coverage/coroutine.coverage
index 3a9791a0dbd..3a9791a0dbd 100644
--- a/tests/run-coverage/coroutine.coverage
+++ b/tests/coverage/coroutine.coverage
diff --git a/tests/coverage-map/status-quo/coroutine.rs b/tests/coverage/coroutine.rs
index 86d19af6f4f..86d19af6f4f 100644
--- a/tests/coverage-map/status-quo/coroutine.rs
+++ b/tests/coverage/coroutine.rs
diff --git a/tests/coverage-map/status-quo/dead_code.cov-map b/tests/coverage/dead_code.cov-map
index 0b8a40a8cde..0b8a40a8cde 100644
--- a/tests/coverage-map/status-quo/dead_code.cov-map
+++ b/tests/coverage/dead_code.cov-map
diff --git a/tests/run-coverage/dead_code.coverage b/tests/coverage/dead_code.coverage
index c4ee9f23f08..c4ee9f23f08 100644
--- a/tests/run-coverage/dead_code.coverage
+++ b/tests/coverage/dead_code.coverage
diff --git a/tests/coverage-map/status-quo/dead_code.rs b/tests/coverage/dead_code.rs
index 3492712a6f9..3492712a6f9 100644
--- a/tests/coverage-map/status-quo/dead_code.rs
+++ b/tests/coverage/dead_code.rs
diff --git a/tests/coverage-map/status-quo/drop_trait.cov-map b/tests/coverage/drop_trait.cov-map
index 203d1048b05..203d1048b05 100644
--- a/tests/coverage-map/status-quo/drop_trait.cov-map
+++ b/tests/coverage/drop_trait.cov-map
diff --git a/tests/run-coverage/drop_trait.coverage b/tests/coverage/drop_trait.coverage
index 2c9439a93b1..2c9439a93b1 100644
--- a/tests/run-coverage/drop_trait.coverage
+++ b/tests/coverage/drop_trait.coverage
diff --git a/tests/coverage-map/status-quo/drop_trait.rs b/tests/coverage/drop_trait.rs
index 7b062719c6b..7b062719c6b 100644
--- a/tests/coverage-map/status-quo/drop_trait.rs
+++ b/tests/coverage/drop_trait.rs
diff --git a/tests/coverage-map/fn_sig_into_try.cov-map b/tests/coverage/fn_sig_into_try.cov-map
index 6e26c61aac9..6e26c61aac9 100644
--- a/tests/coverage-map/fn_sig_into_try.cov-map
+++ b/tests/coverage/fn_sig_into_try.cov-map
diff --git a/tests/run-coverage/fn_sig_into_try.coverage b/tests/coverage/fn_sig_into_try.coverage
index f1ddb1da780..f1ddb1da780 100644
--- a/tests/run-coverage/fn_sig_into_try.coverage
+++ b/tests/coverage/fn_sig_into_try.coverage
diff --git a/tests/coverage-map/fn_sig_into_try.rs b/tests/coverage/fn_sig_into_try.rs
index 92850c8a188..92850c8a188 100644
--- a/tests/coverage-map/fn_sig_into_try.rs
+++ b/tests/coverage/fn_sig_into_try.rs
diff --git a/tests/coverage-map/status-quo/generics.cov-map b/tests/coverage/generics.cov-map
index 6079a433cd0..6079a433cd0 100644
--- a/tests/coverage-map/status-quo/generics.cov-map
+++ b/tests/coverage/generics.cov-map
diff --git a/tests/run-coverage/generics.coverage b/tests/coverage/generics.coverage
index 09839183566..09839183566 100644
--- a/tests/run-coverage/generics.coverage
+++ b/tests/coverage/generics.coverage
diff --git a/tests/coverage-map/status-quo/generics.rs b/tests/coverage/generics.rs
index bf4c2d8d685..bf4c2d8d685 100644
--- a/tests/coverage-map/status-quo/generics.rs
+++ b/tests/coverage/generics.rs
diff --git a/tests/coverage-map/status-quo/if.cov-map b/tests/coverage/if.cov-map
index 391a69e0e82..391a69e0e82 100644
--- a/tests/coverage-map/status-quo/if.cov-map
+++ b/tests/coverage/if.cov-map
diff --git a/tests/run-coverage/if.coverage b/tests/coverage/if.coverage
index 2e6845190aa..2e6845190aa 100644
--- a/tests/run-coverage/if.coverage
+++ b/tests/coverage/if.coverage
diff --git a/tests/coverage-map/status-quo/if.rs b/tests/coverage/if.rs
index 8ad5042ff7b..8ad5042ff7b 100644
--- a/tests/coverage-map/status-quo/if.rs
+++ b/tests/coverage/if.rs
diff --git a/tests/coverage-map/status-quo/if_else.cov-map b/tests/coverage/if_else.cov-map
index da692ca3aa2..da692ca3aa2 100644
--- a/tests/coverage-map/status-quo/if_else.cov-map
+++ b/tests/coverage/if_else.cov-map
diff --git a/tests/run-coverage/if_else.coverage b/tests/coverage/if_else.coverage
index 0274401f004..0274401f004 100644
--- a/tests/run-coverage/if_else.coverage
+++ b/tests/coverage/if_else.coverage
diff --git a/tests/coverage-map/status-quo/if_else.rs b/tests/coverage/if_else.rs
index 3244e1e3afd..3244e1e3afd 100644
--- a/tests/coverage-map/status-quo/if_else.rs
+++ b/tests/coverage/if_else.rs
diff --git a/tests/coverage-map/status-quo/inline-dead.cov-map b/tests/coverage/inline-dead.cov-map
index 958b423f24c..958b423f24c 100644
--- a/tests/coverage-map/status-quo/inline-dead.cov-map
+++ b/tests/coverage/inline-dead.cov-map
diff --git a/tests/run-coverage/inline-dead.coverage b/tests/coverage/inline-dead.coverage
index de96aa17acd..de96aa17acd 100644
--- a/tests/run-coverage/inline-dead.coverage
+++ b/tests/coverage/inline-dead.coverage
diff --git a/tests/coverage-map/status-quo/inline-dead.rs b/tests/coverage/inline-dead.rs
index 854fa062967..854fa062967 100644
--- a/tests/coverage-map/status-quo/inline-dead.rs
+++ b/tests/coverage/inline-dead.rs
diff --git a/tests/coverage-map/status-quo/inline.cov-map b/tests/coverage/inline.cov-map
index 72b10fd0cc2..72b10fd0cc2 100644
--- a/tests/coverage-map/status-quo/inline.cov-map
+++ b/tests/coverage/inline.cov-map
diff --git a/tests/run-coverage/inline.coverage b/tests/coverage/inline.coverage
index 6efd9a0830b..6efd9a0830b 100644
--- a/tests/run-coverage/inline.coverage
+++ b/tests/coverage/inline.coverage
diff --git a/tests/coverage-map/status-quo/inline.rs b/tests/coverage/inline.rs
index 9cfab9ddbad..9cfab9ddbad 100644
--- a/tests/coverage-map/status-quo/inline.rs
+++ b/tests/coverage/inline.rs
diff --git a/tests/coverage-map/status-quo/inner_items.cov-map b/tests/coverage/inner_items.cov-map
index 3f39d74efba..3f39d74efba 100644
--- a/tests/coverage-map/status-quo/inner_items.cov-map
+++ b/tests/coverage/inner_items.cov-map
diff --git a/tests/run-coverage/inner_items.coverage b/tests/coverage/inner_items.coverage
index 65493bcd9db..65493bcd9db 100644
--- a/tests/run-coverage/inner_items.coverage
+++ b/tests/coverage/inner_items.coverage
diff --git a/tests/coverage-map/status-quo/inner_items.rs b/tests/coverage/inner_items.rs
index bcb62b3031c..bcb62b3031c 100644
--- a/tests/coverage-map/status-quo/inner_items.rs
+++ b/tests/coverage/inner_items.rs
diff --git a/tests/coverage-map/status-quo/issue-83601.cov-map b/tests/coverage/issue-83601.cov-map
index f5db3a89750..f5db3a89750 100644
--- a/tests/coverage-map/status-quo/issue-83601.cov-map
+++ b/tests/coverage/issue-83601.cov-map
diff --git a/tests/run-coverage/issue-83601.coverage b/tests/coverage/issue-83601.coverage
index 7995332cad3..7995332cad3 100644
--- a/tests/run-coverage/issue-83601.coverage
+++ b/tests/coverage/issue-83601.coverage
diff --git a/tests/coverage-map/status-quo/issue-83601.rs b/tests/coverage/issue-83601.rs
index 0b72a81947c..0b72a81947c 100644
--- a/tests/coverage-map/status-quo/issue-83601.rs
+++ b/tests/coverage/issue-83601.rs
diff --git a/tests/coverage-map/status-quo/issue-84561.cov-map b/tests/coverage/issue-84561.cov-map
index 82582b309bf..82582b309bf 100644
--- a/tests/coverage-map/status-quo/issue-84561.cov-map
+++ b/tests/coverage/issue-84561.cov-map
diff --git a/tests/run-coverage/issue-84561.coverage b/tests/coverage/issue-84561.coverage
index e693866e277..e693866e277 100644
--- a/tests/run-coverage/issue-84561.coverage
+++ b/tests/coverage/issue-84561.coverage
diff --git a/tests/coverage-map/status-quo/issue-84561.rs b/tests/coverage/issue-84561.rs
index facf5b5b4cf..facf5b5b4cf 100644
--- a/tests/coverage-map/status-quo/issue-84561.rs
+++ b/tests/coverage/issue-84561.rs
diff --git a/tests/coverage/issue-85461.cov-map b/tests/coverage/issue-85461.cov-map
new file mode 100644
index 00000000000..d1c449b9a35
--- /dev/null
+++ b/tests/coverage/issue-85461.cov-map
@@ -0,0 +1,8 @@
+Function name: issue_85461::main
+Raw bytes (9): 0x[01, 01, 00, 01, 01, 08, 01, 03, 02]
+Number of files: 1
+- file 0 => global file 1
+Number of expressions: 0
+Number of file 0 mappings: 1
+- Code(Counter(0)) at (prev + 8, 1) to (start + 3, 2)
+
diff --git a/tests/run-coverage/issue-85461.coverage b/tests/coverage/issue-85461.coverage
index cbc910664d0..cbc910664d0 100644
--- a/tests/run-coverage/issue-85461.coverage
+++ b/tests/coverage/issue-85461.coverage
diff --git a/tests/run-coverage/issue-85461.rs b/tests/coverage/issue-85461.rs
index 9d4c90a827e..9d4c90a827e 100644
--- a/tests/run-coverage/issue-85461.rs
+++ b/tests/coverage/issue-85461.rs
diff --git a/tests/coverage-map/status-quo/issue-93054.cov-map b/tests/coverage/issue-93054.cov-map
index c2c6e9a6516..c2c6e9a6516 100644
--- a/tests/coverage-map/status-quo/issue-93054.cov-map
+++ b/tests/coverage/issue-93054.cov-map
diff --git a/tests/run-coverage/issue-93054.coverage b/tests/coverage/issue-93054.coverage
index 15f225326a4..15f225326a4 100644
--- a/tests/run-coverage/issue-93054.coverage
+++ b/tests/coverage/issue-93054.coverage
diff --git a/tests/coverage-map/status-quo/issue-93054.rs b/tests/coverage/issue-93054.rs
index da546cfeef8..da546cfeef8 100644
--- a/tests/coverage-map/status-quo/issue-93054.rs
+++ b/tests/coverage/issue-93054.rs
diff --git a/tests/coverage-map/status-quo/lazy_boolean.cov-map b/tests/coverage/lazy_boolean.cov-map
index 0ad393c40fa..0ad393c40fa 100644
--- a/tests/coverage-map/status-quo/lazy_boolean.cov-map
+++ b/tests/coverage/lazy_boolean.cov-map
diff --git a/tests/run-coverage/lazy_boolean.coverage b/tests/coverage/lazy_boolean.coverage
index 8f14082ef68..8f14082ef68 100644
--- a/tests/run-coverage/lazy_boolean.coverage
+++ b/tests/coverage/lazy_boolean.coverage
diff --git a/tests/coverage-map/status-quo/lazy_boolean.rs b/tests/coverage/lazy_boolean.rs
index bb6219e851c..bb6219e851c 100644
--- a/tests/coverage-map/status-quo/lazy_boolean.rs
+++ b/tests/coverage/lazy_boolean.rs
diff --git a/tests/coverage-map/long_and_wide.cov-map b/tests/coverage/long_and_wide.cov-map
index 97aebf9b18a..97aebf9b18a 100644
--- a/tests/coverage-map/long_and_wide.cov-map
+++ b/tests/coverage/long_and_wide.cov-map
diff --git a/tests/coverage/long_and_wide.coverage b/tests/coverage/long_and_wide.coverage
new file mode 100644
index 00000000000..d7d29ca40cd
--- /dev/null
+++ b/tests/coverage/long_and_wide.coverage
@@ -0,0 +1,151 @@
+   LL|       |// compile-flags: --edition=2021
+   LL|       |// ignore-tidy-linelength
+   LL|       |
+   LL|       |// This file deliberately contains line and column numbers larger than 127,
+   LL|       |// to verify that `coverage-dump`'s ULEB128 parser can handle them.
+   LL|       |
+   LL|      1|fn main() {
+   LL|      1|    wide_function();
+   LL|      1|    long_function();
+   LL|      1|    far_function();
+   LL|      1|}
+   LL|       |
+   LL|       |#[rustfmt::skip]
+   LL|      1|fn wide_function() { /*                                                                                                           */ (); }
+   LL|       |
+   LL|      1|fn long_function() {
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|    //
+   LL|      1|}
+   LL|       |
+   LL|      1|fn far_function() {}
+
diff --git a/tests/coverage-map/long_and_wide.rs b/tests/coverage/long_and_wide.rs
index a7cbcd48027..a7cbcd48027 100644
--- a/tests/coverage-map/long_and_wide.rs
+++ b/tests/coverage/long_and_wide.rs
diff --git a/tests/coverage-map/status-quo/loop_break_value.cov-map b/tests/coverage/loop_break_value.cov-map
index 75018442d07..75018442d07 100644
--- a/tests/coverage-map/status-quo/loop_break_value.cov-map
+++ b/tests/coverage/loop_break_value.cov-map
diff --git a/tests/run-coverage/loop_break_value.coverage b/tests/coverage/loop_break_value.coverage
index 1f0630636dd..1f0630636dd 100644
--- a/tests/run-coverage/loop_break_value.coverage
+++ b/tests/coverage/loop_break_value.coverage
diff --git a/tests/coverage-map/status-quo/loop_break_value.rs b/tests/coverage/loop_break_value.rs
index dbc4fad7a23..dbc4fad7a23 100644
--- a/tests/coverage-map/status-quo/loop_break_value.rs
+++ b/tests/coverage/loop_break_value.rs
diff --git a/tests/coverage-map/status-quo/loops_branches.cov-map b/tests/coverage/loops_branches.cov-map
index 813583a9de7..813583a9de7 100644
--- a/tests/coverage-map/status-quo/loops_branches.cov-map
+++ b/tests/coverage/loops_branches.cov-map
diff --git a/tests/run-coverage/loops_branches.coverage b/tests/coverage/loops_branches.coverage
index 8cd6f1be3f7..8cd6f1be3f7 100644
--- a/tests/run-coverage/loops_branches.coverage
+++ b/tests/coverage/loops_branches.coverage
diff --git a/tests/coverage-map/status-quo/loops_branches.rs b/tests/coverage/loops_branches.rs
index f3a343bcc1f..f3a343bcc1f 100644
--- a/tests/coverage-map/status-quo/loops_branches.rs
+++ b/tests/coverage/loops_branches.rs
diff --git a/tests/coverage-map/status-quo/match_or_pattern.cov-map b/tests/coverage/match_or_pattern.cov-map
index d63407a99c3..d63407a99c3 100644
--- a/tests/coverage-map/status-quo/match_or_pattern.cov-map
+++ b/tests/coverage/match_or_pattern.cov-map
diff --git a/tests/run-coverage/match_or_pattern.coverage b/tests/coverage/match_or_pattern.coverage
index 94c7967215c..94c7967215c 100644
--- a/tests/run-coverage/match_or_pattern.coverage
+++ b/tests/coverage/match_or_pattern.coverage
diff --git a/tests/coverage-map/status-quo/match_or_pattern.rs b/tests/coverage/match_or_pattern.rs
index ab7aee51d1b..ab7aee51d1b 100644
--- a/tests/coverage-map/status-quo/match_or_pattern.rs
+++ b/tests/coverage/match_or_pattern.rs
diff --git a/tests/coverage-map/status-quo/nested_loops.cov-map b/tests/coverage/nested_loops.cov-map
index 35d92594e75..35d92594e75 100644
--- a/tests/coverage-map/status-quo/nested_loops.cov-map
+++ b/tests/coverage/nested_loops.cov-map
diff --git a/tests/run-coverage/nested_loops.coverage b/tests/coverage/nested_loops.coverage
index 143d0d26aa7..143d0d26aa7 100644
--- a/tests/run-coverage/nested_loops.coverage
+++ b/tests/coverage/nested_loops.coverage
diff --git a/tests/coverage-map/status-quo/nested_loops.rs b/tests/coverage/nested_loops.rs
index 4c7c7842796..4c7c7842796 100644
--- a/tests/coverage-map/status-quo/nested_loops.rs
+++ b/tests/coverage/nested_loops.rs
diff --git a/tests/coverage-map/status-quo/no_cov_crate.cov-map b/tests/coverage/no_cov_crate.cov-map
index 05b6448bbd2..05b6448bbd2 100644
--- a/tests/coverage-map/status-quo/no_cov_crate.cov-map
+++ b/tests/coverage/no_cov_crate.cov-map
diff --git a/tests/run-coverage/no_cov_crate.coverage b/tests/coverage/no_cov_crate.coverage
index f5a0322bf3e..f5a0322bf3e 100644
--- a/tests/run-coverage/no_cov_crate.coverage
+++ b/tests/coverage/no_cov_crate.coverage
diff --git a/tests/coverage-map/status-quo/no_cov_crate.rs b/tests/coverage/no_cov_crate.rs
index e12e4bc55e3..e12e4bc55e3 100644
--- a/tests/coverage-map/status-quo/no_cov_crate.rs
+++ b/tests/coverage/no_cov_crate.rs
diff --git a/tests/coverage-map/status-quo/overflow.cov-map b/tests/coverage/overflow.cov-map
index bfffd9b2ab5..39a5c05f879 100644
--- a/tests/coverage-map/status-quo/overflow.cov-map
+++ b/tests/coverage/overflow.cov-map
@@ -1,5 +1,5 @@
 Function name: overflow::main
-Raw bytes (65): 0x[01, 01, 08, 01, 1b, 05, 1f, 09, 0d, 03, 11, 16, 05, 03, 11, 05, 1f, 09, 0d, 09, 01, 0f, 01, 01, 1b, 03, 02, 0b, 00, 18, 16, 01, 0c, 00, 1a, 05, 00, 1b, 03, 0a, 12, 03, 13, 00, 20, 09, 00, 21, 03, 0a, 0d, 03, 0a, 00, 0b, 1b, 01, 09, 00, 17, 11, 02, 05, 01, 02]
+Raw bytes (65): 0x[01, 01, 08, 01, 1b, 05, 1f, 09, 0d, 03, 11, 16, 05, 03, 11, 05, 1f, 09, 0d, 09, 01, 10, 01, 01, 1b, 03, 02, 0b, 00, 18, 16, 01, 0c, 00, 1a, 05, 00, 1b, 03, 0a, 12, 03, 13, 00, 20, 09, 00, 21, 03, 0a, 0d, 03, 0a, 00, 0b, 1b, 01, 09, 00, 17, 11, 02, 05, 01, 02]
 Number of files: 1
 - file 0 => global file 1
 Number of expressions: 8
@@ -12,7 +12,7 @@ Number of expressions: 8
 - expression 6 operands: lhs = Counter(1), rhs = Expression(7, Add)
 - expression 7 operands: lhs = Counter(2), rhs = Counter(3)
 Number of file 0 mappings: 9
-- Code(Counter(0)) at (prev + 15, 1) to (start + 1, 27)
+- Code(Counter(0)) at (prev + 16, 1) to (start + 1, 27)
 - Code(Expression(0, Add)) at (prev + 2, 11) to (start + 0, 24)
     = (c0 + (c1 + (c2 + c3)))
 - Code(Expression(5, Sub)) at (prev + 1, 12) to (start + 0, 26)
@@ -27,14 +27,14 @@ Number of file 0 mappings: 9
 - Code(Counter(4)) at (prev + 2, 5) to (start + 1, 2)
 
 Function name: overflow::might_overflow
-Raw bytes (28): 0x[01, 01, 02, 01, 05, 05, 02, 04, 01, 04, 01, 01, 12, 05, 01, 13, 02, 06, 02, 02, 06, 00, 07, 07, 01, 09, 05, 02]
+Raw bytes (28): 0x[01, 01, 02, 01, 05, 05, 02, 04, 01, 05, 01, 01, 12, 05, 01, 13, 02, 06, 02, 02, 06, 00, 07, 07, 01, 09, 05, 02]
 Number of files: 1
 - file 0 => global file 1
 Number of expressions: 2
 - expression 0 operands: lhs = Counter(0), rhs = Counter(1)
 - expression 1 operands: lhs = Counter(1), rhs = Expression(0, Sub)
 Number of file 0 mappings: 4
-- Code(Counter(0)) at (prev + 4, 1) to (start + 1, 18)
+- Code(Counter(0)) at (prev + 5, 1) to (start + 1, 18)
 - Code(Counter(1)) at (prev + 1, 19) to (start + 2, 6)
 - Code(Expression(0, Sub)) at (prev + 2, 6) to (start + 0, 7)
     = (c0 - c1)
diff --git a/tests/run-coverage/overflow.coverage b/tests/coverage/overflow.coverage
index cee076e88cd..4f8dffc0c48 100644
--- a/tests/run-coverage/overflow.coverage
+++ b/tests/coverage/overflow.coverage
@@ -1,4 +1,5 @@
    LL|       |#![allow(unused_assignments)]
+   LL|       |// compile-flags: -Coverflow-checks=yes
    LL|       |// failure-status: 101
    LL|       |
    LL|      4|fn might_overflow(to_add: u32) -> u32 {
diff --git a/tests/run-coverage/overflow.rs b/tests/coverage/overflow.rs
index bbb65c1b35d..1c40771b274 100644
--- a/tests/run-coverage/overflow.rs
+++ b/tests/coverage/overflow.rs
@@ -1,4 +1,5 @@
 #![allow(unused_assignments)]
+// compile-flags: -Coverflow-checks=yes
 // failure-status: 101
 
 fn might_overflow(to_add: u32) -> u32 {
diff --git a/tests/coverage-map/status-quo/panic_unwind.cov-map b/tests/coverage/panic_unwind.cov-map
index f6089ce55ae..f6089ce55ae 100644
--- a/tests/coverage-map/status-quo/panic_unwind.cov-map
+++ b/tests/coverage/panic_unwind.cov-map
diff --git a/tests/run-coverage/panic_unwind.coverage b/tests/coverage/panic_unwind.coverage
index 2b0777ef215..2b0777ef215 100644
--- a/tests/run-coverage/panic_unwind.coverage
+++ b/tests/coverage/panic_unwind.coverage
diff --git a/tests/coverage-map/status-quo/panic_unwind.rs b/tests/coverage/panic_unwind.rs
index 638d2eb6aaa..638d2eb6aaa 100644
--- a/tests/coverage-map/status-quo/panic_unwind.rs
+++ b/tests/coverage/panic_unwind.rs
diff --git a/tests/coverage-map/status-quo/partial_eq.cov-map b/tests/coverage/partial_eq.cov-map
index 3549116db7a..3549116db7a 100644
--- a/tests/coverage-map/status-quo/partial_eq.cov-map
+++ b/tests/coverage/partial_eq.cov-map
diff --git a/tests/run-coverage/partial_eq.coverage b/tests/coverage/partial_eq.coverage
index c6d9ad6cf27..c6d9ad6cf27 100644
--- a/tests/run-coverage/partial_eq.coverage
+++ b/tests/coverage/partial_eq.coverage
diff --git a/tests/coverage-map/status-quo/partial_eq.rs b/tests/coverage/partial_eq.rs
index dd8b42c18ce..dd8b42c18ce 100644
--- a/tests/coverage-map/status-quo/partial_eq.rs
+++ b/tests/coverage/partial_eq.rs
diff --git a/tests/coverage-map/status-quo/simple_loop.cov-map b/tests/coverage/simple_loop.cov-map
index f1691ffc5e6..f1691ffc5e6 100644
--- a/tests/coverage-map/status-quo/simple_loop.cov-map
+++ b/tests/coverage/simple_loop.cov-map
diff --git a/tests/run-coverage/simple_loop.coverage b/tests/coverage/simple_loop.coverage
index 691c6cd1e7d..691c6cd1e7d 100644
--- a/tests/run-coverage/simple_loop.coverage
+++ b/tests/coverage/simple_loop.coverage
diff --git a/tests/coverage-map/status-quo/simple_loop.rs b/tests/coverage/simple_loop.rs
index 6f7f23475b8..6f7f23475b8 100644
--- a/tests/coverage-map/status-quo/simple_loop.rs
+++ b/tests/coverage/simple_loop.rs
diff --git a/tests/coverage-map/status-quo/simple_match.cov-map b/tests/coverage/simple_match.cov-map
index 4a32745d292..4a32745d292 100644
--- a/tests/coverage-map/status-quo/simple_match.cov-map
+++ b/tests/coverage/simple_match.cov-map
diff --git a/tests/run-coverage/simple_match.coverage b/tests/coverage/simple_match.coverage
index 7f5dd3bb646..7f5dd3bb646 100644
--- a/tests/run-coverage/simple_match.coverage
+++ b/tests/coverage/simple_match.coverage
diff --git a/tests/coverage-map/status-quo/simple_match.rs b/tests/coverage/simple_match.rs
index be99e59a826..be99e59a826 100644
--- a/tests/coverage-map/status-quo/simple_match.rs
+++ b/tests/coverage/simple_match.rs
diff --git a/tests/coverage-map/status-quo/sort_groups.cov-map b/tests/coverage/sort_groups.cov-map
index db027f3dc32..3cbda6fbe1a 100644
--- a/tests/coverage-map/status-quo/sort_groups.cov-map
+++ b/tests/coverage/sort_groups.cov-map
@@ -28,6 +28,21 @@ Number of file 0 mappings: 4
 - Code(Expression(1, Add)) at (prev + 1, 1) to (start + 0, 2)
     = (c1 + (c0 - c1))
 
+Function name: sort_groups::generic_fn::<char>
+Raw bytes (28): 0x[01, 01, 02, 01, 05, 05, 02, 04, 01, 11, 01, 01, 0c, 05, 01, 0d, 02, 06, 02, 02, 06, 00, 07, 07, 01, 01, 00, 02]
+Number of files: 1
+- file 0 => global file 1
+Number of expressions: 2
+- expression 0 operands: lhs = Counter(0), rhs = Counter(1)
+- expression 1 operands: lhs = Counter(1), rhs = Expression(0, Sub)
+Number of file 0 mappings: 4
+- Code(Counter(0)) at (prev + 17, 1) to (start + 1, 12)
+- Code(Counter(1)) at (prev + 1, 13) to (start + 2, 6)
+- Code(Expression(0, Sub)) at (prev + 2, 6) to (start + 0, 7)
+    = (c0 - c1)
+- Code(Expression(1, Add)) at (prev + 1, 1) to (start + 0, 2)
+    = (c1 + (c0 - c1))
+
 Function name: sort_groups::generic_fn::<i32>
 Raw bytes (28): 0x[01, 01, 02, 01, 05, 05, 02, 04, 01, 11, 01, 01, 0c, 05, 01, 0d, 02, 06, 02, 02, 06, 00, 07, 07, 01, 01, 00, 02]
 Number of files: 1
@@ -44,19 +59,19 @@ Number of file 0 mappings: 4
     = (c1 + (c0 - c1))
 
 Function name: sort_groups::main
-Raw bytes (28): 0x[01, 01, 02, 01, 00, 00, 02, 04, 01, 06, 01, 04, 0d, 00, 04, 0e, 02, 06, 02, 02, 06, 00, 07, 07, 01, 05, 02, 02]
+Raw bytes (28): 0x[01, 01, 02, 01, 05, 05, 02, 04, 01, 06, 01, 04, 23, 05, 04, 24, 02, 06, 02, 02, 06, 00, 07, 07, 01, 05, 02, 02]
 Number of files: 1
 - file 0 => global file 1
 Number of expressions: 2
-- expression 0 operands: lhs = Counter(0), rhs = Zero
-- expression 1 operands: lhs = Zero, rhs = Expression(0, Sub)
+- expression 0 operands: lhs = Counter(0), rhs = Counter(1)
+- expression 1 operands: lhs = Counter(1), rhs = Expression(0, Sub)
 Number of file 0 mappings: 4
-- Code(Counter(0)) at (prev + 6, 1) to (start + 4, 13)
-- Code(Zero) at (prev + 4, 14) to (start + 2, 6)
+- Code(Counter(0)) at (prev + 6, 1) to (start + 4, 35)
+- Code(Counter(1)) at (prev + 4, 36) to (start + 2, 6)
 - Code(Expression(0, Sub)) at (prev + 2, 6) to (start + 0, 7)
-    = (c0 - Zero)
+    = (c0 - c1)
 - Code(Expression(1, Add)) at (prev + 1, 5) to (start + 2, 2)
-    = (Zero + (c0 - Zero))
+    = (c1 + (c0 - c1))
 
 Function name: sort_groups::other_fn
 Raw bytes (9): 0x[01, 01, 00, 01, 01, 17, 01, 00, 11]
diff --git a/tests/run-coverage/sort_groups.coverage b/tests/coverage/sort_groups.coverage
index 8733bf48a9c..c70d7b3b282 100644
--- a/tests/run-coverage/sort_groups.coverage
+++ b/tests/coverage/sort_groups.coverage
@@ -7,7 +7,7 @@
    LL|      1|    let cond = std::env::args().len() > 1;
    LL|      1|    generic_fn::<()>(cond);
    LL|      1|    generic_fn::<&'static str>(!cond);
-   LL|      1|    if false {
+   LL|      1|    if std::hint::black_box(false) {
    LL|      0|        generic_fn::<char>(cond);
    LL|      1|    }
    LL|      1|    generic_fn::<i32>(cond);
diff --git a/tests/run-coverage/sort_groups.rs b/tests/coverage/sort_groups.rs
index f89f9f3ec61..5adbbc6a87d 100644
--- a/tests/run-coverage/sort_groups.rs
+++ b/tests/coverage/sort_groups.rs
@@ -7,7 +7,7 @@ fn main() {
     let cond = std::env::args().len() > 1;
     generic_fn::<()>(cond);
     generic_fn::<&'static str>(!cond);
-    if false {
+    if std::hint::black_box(false) {
         generic_fn::<char>(cond);
     }
     generic_fn::<i32>(cond);
diff --git a/tests/coverage-map/status-quo/test_harness.cov-map b/tests/coverage/test_harness.cov-map
index 6940d2e2824..6940d2e2824 100644
--- a/tests/coverage-map/status-quo/test_harness.cov-map
+++ b/tests/coverage/test_harness.cov-map
diff --git a/tests/run-coverage/test_harness.coverage b/tests/coverage/test_harness.coverage
index ff6009f6fce..ff6009f6fce 100644
--- a/tests/run-coverage/test_harness.coverage
+++ b/tests/coverage/test_harness.coverage
diff --git a/tests/coverage-map/status-quo/test_harness.rs b/tests/coverage/test_harness.rs
index 12a755734c1..12a755734c1 100644
--- a/tests/coverage-map/status-quo/test_harness.rs
+++ b/tests/coverage/test_harness.rs
diff --git a/tests/coverage-map/status-quo/tight_inf_loop.cov-map b/tests/coverage/tight_inf_loop.cov-map
index 7fe3146b080..7fe3146b080 100644
--- a/tests/coverage-map/status-quo/tight_inf_loop.cov-map
+++ b/tests/coverage/tight_inf_loop.cov-map
diff --git a/tests/run-coverage/tight_inf_loop.coverage b/tests/coverage/tight_inf_loop.coverage
index c15c76b3aba..c15c76b3aba 100644
--- a/tests/run-coverage/tight_inf_loop.coverage
+++ b/tests/coverage/tight_inf_loop.coverage
diff --git a/tests/coverage-map/status-quo/tight_inf_loop.rs b/tests/coverage/tight_inf_loop.rs
index cef99027aaa..cef99027aaa 100644
--- a/tests/coverage-map/status-quo/tight_inf_loop.rs
+++ b/tests/coverage/tight_inf_loop.rs
diff --git a/tests/coverage-map/trivial.cov-map b/tests/coverage/trivial.cov-map
index 874e294a1c4..874e294a1c4 100644
--- a/tests/coverage-map/trivial.cov-map
+++ b/tests/coverage/trivial.cov-map
diff --git a/tests/coverage/trivial.coverage b/tests/coverage/trivial.coverage
new file mode 100644
index 00000000000..4f417979ef9
--- /dev/null
+++ b/tests/coverage/trivial.coverage
@@ -0,0 +1,4 @@
+   LL|       |// compile-flags: --edition=2021
+   LL|       |
+   LL|      1|fn main() {}
+
diff --git a/tests/coverage-map/trivial.rs b/tests/coverage/trivial.rs
index d0a9b44fb36..d0a9b44fb36 100644
--- a/tests/coverage-map/trivial.rs
+++ b/tests/coverage/trivial.rs
diff --git a/tests/coverage-map/status-quo/try_error_result.cov-map b/tests/coverage/try_error_result.cov-map
index 8367103a21a..8367103a21a 100644
--- a/tests/coverage-map/status-quo/try_error_result.cov-map
+++ b/tests/coverage/try_error_result.cov-map
diff --git a/tests/run-coverage/try_error_result.coverage b/tests/coverage/try_error_result.coverage
index 5d48cbd62f2..5d48cbd62f2 100644
--- a/tests/run-coverage/try_error_result.coverage
+++ b/tests/coverage/try_error_result.coverage
diff --git a/tests/coverage-map/status-quo/try_error_result.rs b/tests/coverage/try_error_result.rs
index 557cbf22bfa..557cbf22bfa 100644
--- a/tests/coverage-map/status-quo/try_error_result.rs
+++ b/tests/coverage/try_error_result.rs
diff --git a/tests/coverage-map/unreachable.cov-map b/tests/coverage/unreachable.cov-map
index 495419820c1..495419820c1 100644
--- a/tests/coverage-map/unreachable.cov-map
+++ b/tests/coverage/unreachable.cov-map
diff --git a/tests/run-coverage/unreachable.coverage b/tests/coverage/unreachable.coverage
index fa0ac9ccfa1..fa0ac9ccfa1 100644
--- a/tests/run-coverage/unreachable.coverage
+++ b/tests/coverage/unreachable.coverage
diff --git a/tests/coverage-map/unreachable.rs b/tests/coverage/unreachable.rs
index 6385bfa160d..6385bfa160d 100644
--- a/tests/coverage-map/unreachable.rs
+++ b/tests/coverage/unreachable.rs
diff --git a/tests/coverage-map/status-quo/unused.cov-map b/tests/coverage/unused.cov-map
index 9383d1e90ac..9383d1e90ac 100644
--- a/tests/coverage-map/status-quo/unused.cov-map
+++ b/tests/coverage/unused.cov-map
diff --git a/tests/run-coverage/unused.coverage b/tests/coverage/unused.coverage
index 056ffeb021a..056ffeb021a 100644
--- a/tests/run-coverage/unused.coverage
+++ b/tests/coverage/unused.coverage
diff --git a/tests/coverage-map/status-quo/unused.rs b/tests/coverage/unused.rs
index d985af13547..d985af13547 100644
--- a/tests/coverage-map/status-quo/unused.rs
+++ b/tests/coverage/unused.rs
diff --git a/tests/coverage/unused_mod.cov-map b/tests/coverage/unused_mod.cov-map
new file mode 100644
index 00000000000..241cb2610ff
--- /dev/null
+++ b/tests/coverage/unused_mod.cov-map
@@ -0,0 +1,16 @@
+Function name: unused_mod::main
+Raw bytes (9): 0x[01, 02, 00, 01, 01, 04, 01, 02, 02]
+Number of files: 1
+- file 0 => global file 2
+Number of expressions: 0
+Number of file 0 mappings: 1
+- Code(Counter(0)) at (prev + 4, 1) to (start + 2, 2)
+
+Function name: unused_mod::unused_module::never_called_function (unused)
+Raw bytes (9): 0x[01, 01, 00, 01, 00, 02, 01, 02, 02]
+Number of files: 1
+- file 0 => global file 1
+Number of expressions: 0
+Number of file 0 mappings: 1
+- Code(Zero) at (prev + 2, 1) to (start + 2, 2)
+
diff --git a/tests/run-coverage/unused_mod.coverage b/tests/coverage/unused_mod.coverage
index a8fa24ac6a7..a8fa24ac6a7 100644
--- a/tests/run-coverage/unused_mod.coverage
+++ b/tests/coverage/unused_mod.coverage
diff --git a/tests/run-coverage/unused_mod.rs b/tests/coverage/unused_mod.rs
index 6e62839c998..6e62839c998 100644
--- a/tests/run-coverage/unused_mod.rs
+++ b/tests/coverage/unused_mod.rs
diff --git a/tests/coverage/uses_crate.cov-map b/tests/coverage/uses_crate.cov-map
new file mode 100644
index 00000000000..9c06eab7005
--- /dev/null
+++ b/tests/coverage/uses_crate.cov-map
@@ -0,0 +1,40 @@
+Function name: used_crate::used_from_bin_crate_and_lib_crate_generic_function::<alloc::vec::Vec<i32>>
+Raw bytes (9): 0x[01, 01, 00, 01, 01, 1b, 01, 02, 02]
+Number of files: 1
+- file 0 => global file 1
+Number of expressions: 0
+Number of file 0 mappings: 1
+- Code(Counter(0)) at (prev + 27, 1) to (start + 2, 2)
+
+Function name: used_crate::used_only_from_bin_crate_generic_function::<&alloc::vec::Vec<i32>>
+Raw bytes (9): 0x[01, 01, 00, 01, 01, 13, 01, 02, 02]
+Number of files: 1
+- file 0 => global file 1
+Number of expressions: 0
+Number of file 0 mappings: 1
+- Code(Counter(0)) at (prev + 19, 1) to (start + 2, 2)
+
+Function name: used_crate::used_only_from_bin_crate_generic_function::<&str>
+Raw bytes (9): 0x[01, 01, 00, 01, 01, 13, 01, 02, 02]
+Number of files: 1
+- file 0 => global file 1
+Number of expressions: 0
+Number of file 0 mappings: 1
+- Code(Counter(0)) at (prev + 19, 1) to (start + 2, 2)
+
+Function name: used_crate::used_with_same_type_from_bin_crate_and_lib_crate_generic_function::<&str>
+Raw bytes (9): 0x[01, 01, 00, 01, 01, 1f, 01, 02, 02]
+Number of files: 1
+- file 0 => global file 1
+Number of expressions: 0
+Number of file 0 mappings: 1
+- Code(Counter(0)) at (prev + 31, 1) to (start + 2, 2)
+
+Function name: uses_crate::main
+Raw bytes (9): 0x[01, 02, 00, 01, 01, 0c, 01, 07, 02]
+Number of files: 1
+- file 0 => global file 2
+Number of expressions: 0
+Number of file 0 mappings: 1
+- Code(Counter(0)) at (prev + 12, 1) to (start + 7, 2)
+
diff --git a/tests/run-coverage/uses_crate.coverage b/tests/coverage/uses_crate.coverage
index 50d92102a10..50d92102a10 100644
--- a/tests/run-coverage/uses_crate.coverage
+++ b/tests/coverage/uses_crate.coverage
diff --git a/tests/run-coverage/uses_crate.rs b/tests/coverage/uses_crate.rs
index ab203ad781d..ab203ad781d 100644
--- a/tests/run-coverage/uses_crate.rs
+++ b/tests/coverage/uses_crate.rs
diff --git a/tests/coverage/uses_inline_crate.cov-map b/tests/coverage/uses_inline_crate.cov-map
new file mode 100644
index 00000000000..6b621825c88
--- /dev/null
+++ b/tests/coverage/uses_inline_crate.cov-map
@@ -0,0 +1,55 @@
+Function name: used_inline_crate::used_from_bin_crate_and_lib_crate_generic_function::<alloc::vec::Vec<i32>>
+Raw bytes (9): 0x[01, 01, 00, 01, 01, 2c, 01, 02, 02]
+Number of files: 1
+- file 0 => global file 1
+Number of expressions: 0
+Number of file 0 mappings: 1
+- Code(Counter(0)) at (prev + 44, 1) to (start + 2, 2)
+
+Function name: used_inline_crate::used_inline_function
+Raw bytes (28): 0x[01, 01, 02, 01, 05, 05, 02, 04, 01, 14, 01, 06, 0f, 05, 06, 10, 02, 06, 02, 02, 06, 00, 07, 07, 01, 05, 01, 02]
+Number of files: 1
+- file 0 => global file 1
+Number of expressions: 2
+- expression 0 operands: lhs = Counter(0), rhs = Counter(1)
+- expression 1 operands: lhs = Counter(1), rhs = Expression(0, Sub)
+Number of file 0 mappings: 4
+- Code(Counter(0)) at (prev + 20, 1) to (start + 6, 15)
+- Code(Counter(1)) at (prev + 6, 16) to (start + 2, 6)
+- Code(Expression(0, Sub)) at (prev + 2, 6) to (start + 0, 7)
+    = (c0 - c1)
+- Code(Expression(1, Add)) at (prev + 1, 5) to (start + 1, 2)
+    = (c1 + (c0 - c1))
+
+Function name: used_inline_crate::used_only_from_bin_crate_generic_function::<&alloc::vec::Vec<i32>>
+Raw bytes (9): 0x[01, 01, 00, 01, 01, 21, 01, 02, 02]
+Number of files: 1
+- file 0 => global file 1
+Number of expressions: 0
+Number of file 0 mappings: 1
+- Code(Counter(0)) at (prev + 33, 1) to (start + 2, 2)
+
+Function name: used_inline_crate::used_only_from_bin_crate_generic_function::<&str>
+Raw bytes (9): 0x[01, 01, 00, 01, 01, 21, 01, 02, 02]
+Number of files: 1
+- file 0 => global file 1
+Number of expressions: 0
+Number of file 0 mappings: 1
+- Code(Counter(0)) at (prev + 33, 1) to (start + 2, 2)
+
+Function name: used_inline_crate::used_with_same_type_from_bin_crate_and_lib_crate_generic_function::<&str>
+Raw bytes (9): 0x[01, 01, 00, 01, 01, 31, 01, 02, 02]
+Number of files: 1
+- file 0 => global file 1
+Number of expressions: 0
+Number of file 0 mappings: 1
+- Code(Counter(0)) at (prev + 49, 1) to (start + 2, 2)
+
+Function name: uses_inline_crate::main
+Raw bytes (9): 0x[01, 02, 00, 01, 01, 0c, 01, 0a, 02]
+Number of files: 1
+- file 0 => global file 2
+Number of expressions: 0
+Number of file 0 mappings: 1
+- Code(Counter(0)) at (prev + 12, 1) to (start + 10, 2)
+
diff --git a/tests/run-coverage/uses_inline_crate.coverage b/tests/coverage/uses_inline_crate.coverage
index cc0e01ffde1..cc0e01ffde1 100644
--- a/tests/run-coverage/uses_inline_crate.coverage
+++ b/tests/coverage/uses_inline_crate.coverage
diff --git a/tests/run-coverage/uses_inline_crate.rs b/tests/coverage/uses_inline_crate.rs
index d7b4c3c057f..d7b4c3c057f 100644
--- a/tests/run-coverage/uses_inline_crate.rs
+++ b/tests/coverage/uses_inline_crate.rs
diff --git a/tests/coverage-map/status-quo/while.cov-map b/tests/coverage/while.cov-map
index af250f3fb71..af250f3fb71 100644
--- a/tests/coverage-map/status-quo/while.cov-map
+++ b/tests/coverage/while.cov-map
diff --git a/tests/run-coverage/while.coverage b/tests/coverage/while.coverage
index c9d497651c9..c9d497651c9 100644
--- a/tests/run-coverage/while.coverage
+++ b/tests/coverage/while.coverage
diff --git a/tests/coverage-map/status-quo/while.rs b/tests/coverage/while.rs
index 781b90b3566..781b90b3566 100644
--- a/tests/coverage-map/status-quo/while.rs
+++ b/tests/coverage/while.rs
diff --git a/tests/coverage-map/status-quo/while_early_ret.cov-map b/tests/coverage/while_early_ret.cov-map
index 369ebe891f1..369ebe891f1 100644
--- a/tests/coverage-map/status-quo/while_early_ret.cov-map
+++ b/tests/coverage/while_early_ret.cov-map
diff --git a/tests/run-coverage/while_early_ret.coverage b/tests/coverage/while_early_ret.coverage
index 49d39d36603..49d39d36603 100644
--- a/tests/run-coverage/while_early_ret.coverage
+++ b/tests/coverage/while_early_ret.coverage
diff --git a/tests/coverage-map/status-quo/while_early_ret.rs b/tests/coverage/while_early_ret.rs
index b2f0eee2cc0..b2f0eee2cc0 100644
--- a/tests/coverage-map/status-quo/while_early_ret.rs
+++ b/tests/coverage/while_early_ret.rs
diff --git a/tests/coverage-map/status-quo/yield.cov-map b/tests/coverage/yield.cov-map
index c9c9709fa4f..c9c9709fa4f 100644
--- a/tests/coverage-map/status-quo/yield.cov-map
+++ b/tests/coverage/yield.cov-map
diff --git a/tests/run-coverage/yield.coverage b/tests/coverage/yield.coverage
index d7e455f211e..d7e455f211e 100644
--- a/tests/run-coverage/yield.coverage
+++ b/tests/coverage/yield.coverage
diff --git a/tests/coverage-map/status-quo/yield.rs b/tests/coverage/yield.rs
index b7e2ba31b59..b7e2ba31b59 100644
--- a/tests/coverage-map/status-quo/yield.rs
+++ b/tests/coverage/yield.rs
diff --git a/tests/run-coverage/abort.rs b/tests/run-coverage/abort.rs
deleted file mode 100644
index 98264bdc1af..00000000000
--- a/tests/run-coverage/abort.rs
+++ /dev/null
@@ -1,66 +0,0 @@
-#![feature(c_unwind)]
-#![allow(unused_assignments)]
-
-extern "C" fn might_abort(should_abort: bool) {
-    if should_abort {
-        println!("aborting...");
-        panic!("panics and aborts");
-    } else {
-        println!("Don't Panic");
-    }
-}
-
-fn main() -> Result<(), u8> {
-    let mut countdown = 10;
-    while countdown > 0 {
-        if countdown < 5 {
-            might_abort(false);
-        }
-        // See discussion (below the `Notes` section) on coverage results for the closing brace.
-        if countdown < 5 { might_abort(false); } // Counts for different regions on one line.
-        // For the following example, the closing brace is the last character on the line.
-        // This shows the character after the closing brace is highlighted, even if that next
-        // character is a newline.
-        if countdown < 5 { might_abort(false); }
-        countdown -= 1;
-    }
-    Ok(())
-}
-
-// Notes:
-//   1. Compare this program and its coverage results to those of the similar tests
-//      `panic_unwind.rs` and `try_error_result.rs`.
-//   2. This test confirms the coverage generated when a program includes `UnwindAction::Terminate`.
-//   3. The test does not invoke the abort. By executing to a successful completion, the coverage
-//      results show where the program did and did not execute.
-//   4. If the program actually aborted, the coverage counters would not be saved (which "works as
-//      intended"). Coverage results would show no executed coverage regions.
-//   6. If `should_abort` is `true` and the program aborts, the program exits with a `132` status
-//      (on Linux at least).
-
-/*
-
-Expect the following coverage results:
-
-```text
-    16|     11|    while countdown > 0 {
-    17|     10|        if countdown < 5 {
-    18|      4|            might_abort(false);
-    19|      6|        }
-```
-
-This is actually correct.
-
-The condition `countdown < 5` executed 10 times (10 loop iterations).
-
-It evaluated to `true` 4 times, and executed the `might_abort()` call.
-
-It skipped the body of the `might_abort()` call 6 times. If an `if` does not include an explicit
-`else`, the coverage implementation injects a counter, at the character immediately after the `if`s
-closing brace, to count the "implicit" `else`. This is the only way to capture the coverage of the
-non-true condition.
-
-As another example of why this is important, say the condition was `countdown < 50`, which is always
-`true`. In that case, we wouldn't have a test for what happens if `might_abort()` is not called.
-The closing brace would have a count of `0`, highlighting the missed coverage.
-*/
diff --git a/tests/run-coverage/assert.rs b/tests/run-coverage/assert.rs
deleted file mode 100644
index 85e6662a6ad..00000000000
--- a/tests/run-coverage/assert.rs
+++ /dev/null
@@ -1,32 +0,0 @@
-#![allow(unused_assignments)]
-// failure-status: 101
-
-fn might_fail_assert(one_plus_one: u32) {
-    println!("does 1 + 1 = {}?", one_plus_one);
-    assert_eq!(1 + 1, one_plus_one, "the argument was wrong");
-}
-
-fn main() -> Result<(), u8> {
-    let mut countdown = 10;
-    while countdown > 0 {
-        if countdown == 1 {
-            might_fail_assert(3);
-        } else if countdown < 5 {
-            might_fail_assert(2);
-        }
-        countdown -= 1;
-    }
-    Ok(())
-}
-
-// Notes:
-//   1. Compare this program and its coverage results to those of the very similar test
-//      `panic_unwind.rs`, and similar tests `abort.rs` and `try_error_result.rs`.
-//   2. This test confirms the coverage generated when a program passes or fails an `assert!()` or
-//      related `assert_*!()` macro.
-//   3. Notably, the `assert` macros *do not* generate `TerminatorKind::Assert`. The macros produce
-//      conditional expressions, `TerminatorKind::SwitchInt` branches, and a possible call to
-//      `begin_panic_fmt()` (that begins a panic unwind, if the assertion test fails).
-//   4. `TerminatoKind::Assert` is, however, also present in the MIR generated for this test
-//      (and in many other coverage tests). The `Assert` terminator is typically generated by the
-//      Rust compiler to check for runtime failures, such as numeric overflows.
diff --git a/tests/run-coverage/async.rs b/tests/run-coverage/async.rs
deleted file mode 100644
index efd9e62d64e..00000000000
--- a/tests/run-coverage/async.rs
+++ /dev/null
@@ -1,128 +0,0 @@
-#![allow(unused_assignments, dead_code)]
-
-// compile-flags: --edition=2018 -C opt-level=1
-
-async fn c(x: u8) -> u8 {
-    if x == 8 {
-        1
-    } else {
-        0
-    }
-}
-
-async fn d() -> u8 { 1 }
-
-async fn e() -> u8 { 1 } // unused function; executor does not block on `g()`
-
-async fn f() -> u8 { 1 }
-
-async fn foo() -> [bool; 10] { [false; 10] } // unused function; executor does not block on `h()`
-
-pub async fn g(x: u8) {
-    match x {
-        y if e().await == y => (),
-        y if f().await == y => (),
-        _ => (),
-    }
-}
-
-async fn h(x: usize) { // The function signature is counted when called, but the body is not
-                       // executed (not awaited) so the open brace has a `0` count (at least when
-                       // displayed with `llvm-cov show` in color-mode).
-    match x {
-        y if foo().await[y] => (),
-        _ => (),
-    }
-}
-
-async fn i(x: u8) { // line coverage is 1, but there are 2 regions:
-                    // (a) the function signature, counted when the function is called; and
-                    // (b) the open brace for the function body, counted once when the body is
-                    // executed asynchronously.
-    match x {
-        y if c(x).await == y + 1 => { d().await; }
-        y if f().await == y + 1 => (),
-        _ => (),
-    }
-}
-
-fn j(x: u8) {
-    // non-async versions of `c()`, `d()`, and `f()` to make it similar to async `i()`.
-    fn c(x: u8) -> u8 {
-        if x == 8 {
-            1 // This line appears covered, but the 1-character expression span covering the `1`
-              // is not executed. (`llvm-cov show` displays a `^0` below the `1` ). This is because
-              // `fn j()` executes the open brace for the function body, followed by the function's
-              // first executable statement, `match x`. Inner function declarations are not
-              // "visible" to the MIR for `j()`, so the code region counts all lines between the
-              // open brace and the first statement as executed, which is, in a sense, true.
-              // `llvm-cov show` overcomes this kind of situation by showing the actual counts
-              // of the enclosed coverages, (that is, the `1` expression was not executed, and
-              // accurately displays a `0`).
-        } else {
-            0
-        }
-    }
-    fn d() -> u8 { 1 } // inner function is defined in-line, but the function is not executed
-    fn f() -> u8 { 1 }
-    match x {
-        y if c(x) == y + 1 => { d(); }
-        y if f() == y + 1 => (),
-        _ => (),
-    }
-}
-
-fn k(x: u8) { // unused function
-    match x {
-        1 => (),
-        2 => (),
-        _ => (),
-    }
-}
-
-fn l(x: u8) {
-    match x {
-        1 => (),
-        2 => (),
-        _ => (),
-    }
-}
-
-async fn m(x: u8) -> u8 { x - 1 }
-
-fn main() {
-    let _ = g(10);
-    let _ = h(9);
-    let mut future = Box::pin(i(8));
-    j(7);
-    l(6);
-    let _ = m(5);
-    executor::block_on(future.as_mut());
-}
-
-mod executor {
-    use core::{
-        future::Future,
-        pin::Pin,
-        task::{Context, Poll, RawWaker, RawWakerVTable, Waker},
-    };
-
-    pub fn block_on<F: Future>(mut future: F) -> F::Output {
-        let mut future = unsafe { Pin::new_unchecked(&mut future) };
-        use std::hint::unreachable_unchecked;
-        static VTABLE: RawWakerVTable = RawWakerVTable::new(
-            |_| unsafe { unreachable_unchecked() }, // clone
-            |_| unsafe { unreachable_unchecked() }, // wake
-            |_| unsafe { unreachable_unchecked() }, // wake_by_ref
-            |_| (),
-        );
-        let waker = unsafe { Waker::from_raw(RawWaker::new(core::ptr::null(), &VTABLE)) };
-        let mut context = Context::from_waker(&waker);
-
-        loop {
-            if let Poll::Ready(val) = future.as_mut().poll(&mut context) {
-                break val;
-            }
-        }
-    }
-}
diff --git a/tests/run-coverage/async2.rs b/tests/run-coverage/async2.rs
deleted file mode 100644
index 2884ff297af..00000000000
--- a/tests/run-coverage/async2.rs
+++ /dev/null
@@ -1,57 +0,0 @@
-// compile-flags: --edition=2018
-
-fn non_async_func() {
-    println!("non_async_func was covered");
-    let b = true;
-    if b {
-        println!("non_async_func println in block");
-    }
-}
-
-async fn async_func() {
-    println!("async_func was covered");
-    let b = true;
-    if b {
-        println!("async_func println in block");
-    }
-}
-
-async fn async_func_just_println() {
-    println!("async_func_just_println was covered");
-}
-
-fn main() {
-    println!("codecovsample::main");
-
-    non_async_func();
-
-    executor::block_on(async_func());
-    executor::block_on(async_func_just_println());
-}
-
-mod executor {
-    use core::{
-        future::Future,
-        pin::Pin,
-        task::{Context, Poll, RawWaker, RawWakerVTable, Waker},
-    };
-
-    pub fn block_on<F: Future>(mut future: F) -> F::Output {
-        let mut future = unsafe { Pin::new_unchecked(&mut future) };
-        use std::hint::unreachable_unchecked;
-        static VTABLE: RawWakerVTable = RawWakerVTable::new(
-            |_| unsafe { unreachable_unchecked() }, // clone
-            |_| unsafe { unreachable_unchecked() }, // wake
-            |_| unsafe { unreachable_unchecked() }, // wake_by_ref
-            |_| (),
-        );
-        let waker = unsafe { Waker::from_raw(RawWaker::new(core::ptr::null(), &VTABLE)) };
-        let mut context = Context::from_waker(&waker);
-
-        loop {
-            if let Poll::Ready(val) = future.as_mut().poll(&mut context) {
-                break val;
-            }
-        }
-    }
-}
diff --git a/tests/run-coverage/bad_counter_ids.rs b/tests/run-coverage/bad_counter_ids.rs
deleted file mode 100644
index ef5460102b7..00000000000
--- a/tests/run-coverage/bad_counter_ids.rs
+++ /dev/null
@@ -1,66 +0,0 @@
-#![feature(coverage_attribute)]
-// compile-flags: --edition=2021 -Copt-level=0 -Zmir-opt-level=3
-
-// Regression test for <https://github.com/rust-lang/rust/issues/117012>.
-//
-// If some coverage counters were removed by MIR optimizations, we need to take
-// care not to refer to those counter IDs in coverage mappings, and instead
-// replace them with a constant zero value. If we don't, `llvm-cov` might see
-// a too-large counter ID and silently discard the entire function from its
-// coverage reports.
-
-#[derive(Debug, PartialEq, Eq)]
-struct Foo(u32);
-
-fn eq_good() {
-    println!("a");
-    assert_eq!(Foo(1), Foo(1));
-}
-
-fn eq_good_message() {
-    println!("b");
-    assert_eq!(Foo(1), Foo(1), "message b");
-}
-
-fn ne_good() {
-    println!("c");
-    assert_ne!(Foo(1), Foo(3));
-}
-
-fn ne_good_message() {
-    println!("d");
-    assert_ne!(Foo(1), Foo(3), "message d");
-}
-
-fn eq_bad() {
-    println!("e");
-    assert_eq!(Foo(1), Foo(3));
-}
-
-fn eq_bad_message() {
-    println!("f");
-    assert_eq!(Foo(1), Foo(3), "message f");
-}
-
-fn ne_bad() {
-    println!("g");
-    assert_ne!(Foo(1), Foo(1));
-}
-
-fn ne_bad_message() {
-    println!("h");
-    assert_ne!(Foo(1), Foo(1), "message h");
-}
-
-#[coverage(off)]
-fn main() {
-    eq_good();
-    eq_good_message();
-    ne_good();
-    ne_good_message();
-
-    assert!(std::panic::catch_unwind(eq_bad).is_err());
-    assert!(std::panic::catch_unwind(eq_bad_message).is_err());
-    assert!(std::panic::catch_unwind(ne_bad).is_err());
-    assert!(std::panic::catch_unwind(ne_bad_message).is_err());
-}
diff --git a/tests/run-coverage/closure.rs b/tests/run-coverage/closure.rs
deleted file mode 100644
index 16a2c4e33bd..00000000000
--- a/tests/run-coverage/closure.rs
+++ /dev/null
@@ -1,220 +0,0 @@
-#![allow(unused_assignments, unused_variables)]
-// compile-flags: -C opt-level=2
-
-// This test used to be sensitive to certain coverage-specific hacks in
-// `rustc_middle/mir/mono.rs`, but those hacks were later cleaned up by
-// <https://github.com/rust-lang/rust/pull/83666>.
-
-fn main() {
-    // Initialize test constants in a way that cannot be determined at compile time, to ensure
-    // rustc and LLVM cannot optimize out statements (or coverage counters) downstream from
-    // dependent conditions.
-    let is_true = std::env::args().len() == 1;
-    let is_false = !is_true;
-
-    let mut some_string = Some(String::from("the string content"));
-    println!(
-        "The string or alt: {}"
-        ,
-        some_string
-            .
-            unwrap_or_else
-        (
-            ||
-            {
-                let mut countdown = 0;
-                if is_false {
-                    countdown = 10;
-                }
-                "alt string 1".to_owned()
-            }
-        )
-    );
-
-    some_string = Some(String::from("the string content"));
-    let
-        a
-    =
-        ||
-    {
-        let mut countdown = 0;
-        if is_false {
-            countdown = 10;
-        }
-        "alt string 2".to_owned()
-    };
-    println!(
-        "The string or alt: {}"
-        ,
-        some_string
-            .
-            unwrap_or_else
-        (
-            a
-        )
-    );
-
-    some_string = None;
-    println!(
-        "The string or alt: {}"
-        ,
-        some_string
-            .
-            unwrap_or_else
-        (
-            ||
-            {
-                let mut countdown = 0;
-                if is_false {
-                    countdown = 10;
-                }
-                "alt string 3".to_owned()
-            }
-        )
-    );
-
-    some_string = None;
-    let
-        a
-    =
-        ||
-    {
-        let mut countdown = 0;
-        if is_false {
-            countdown = 10;
-        }
-        "alt string 4".to_owned()
-    };
-    println!(
-        "The string or alt: {}"
-        ,
-        some_string
-            .
-            unwrap_or_else
-        (
-            a
-        )
-    );
-
-    let
-        quote_closure
-    =
-        |val|
-    {
-        let mut countdown = 0;
-        if is_false {
-            countdown = 10;
-        }
-        format!("'{}'", val)
-    };
-    println!(
-        "Repeated, quoted string: {:?}"
-        ,
-        std::iter::repeat("repeat me")
-            .take(5)
-            .map
-        (
-            quote_closure
-        )
-            .collect::<Vec<_>>()
-    );
-
-    let
-        _unused_closure
-    =
-        |
-            mut countdown
-        |
-    {
-        if is_false {
-            countdown = 10;
-        }
-        "closure should be unused".to_owned()
-    };
-
-    let mut countdown = 10;
-    let _short_unused_closure = | _unused_arg: u8 | countdown += 1;
-
-
-    let short_used_covered_closure_macro = | used_arg: u8 | println!("called");
-    let short_used_not_covered_closure_macro = | used_arg: u8 | println!("not called");
-    let _short_unused_closure_macro = | _unused_arg: u8 | println!("not called");
-
-
-
-
-    let _short_unused_closure_block = | _unused_arg: u8 | { println!("not called") };
-
-    let _shortish_unused_closure = | _unused_arg: u8 | {
-        println!("not called")
-    };
-
-    let _as_short_unused_closure = |
-        _unused_arg: u8
-    | { println!("not called") };
-
-    let _almost_as_short_unused_closure = |
-        _unused_arg: u8
-    | { println!("not called") }
-    ;
-
-
-
-
-
-    let _short_unused_closure_line_break_no_block = | _unused_arg: u8 |
-println!("not called")
-    ;
-
-    let _short_unused_closure_line_break_no_block2 =
-        | _unused_arg: u8 |
-            println!(
-                "not called"
-            )
-    ;
-
-    let short_used_not_covered_closure_line_break_no_block_embedded_branch =
-        | _unused_arg: u8 |
-            println!(
-                "not called: {}",
-                if is_true { "check" } else { "me" }
-            )
-    ;
-
-    let short_used_not_covered_closure_line_break_block_embedded_branch =
-        | _unused_arg: u8 |
-        {
-            println!(
-                "not called: {}",
-                if is_true { "check" } else { "me" }
-            )
-        }
-    ;
-
-    let short_used_covered_closure_line_break_no_block_embedded_branch =
-        | _unused_arg: u8 |
-            println!(
-                "not called: {}",
-                if is_true { "check" } else { "me" }
-            )
-    ;
-
-    let short_used_covered_closure_line_break_block_embedded_branch =
-        | _unused_arg: u8 |
-        {
-            println!(
-                "not called: {}",
-                if is_true { "check" } else { "me" }
-            )
-        }
-    ;
-
-    if is_false {
-        short_used_not_covered_closure_macro(0);
-        short_used_not_covered_closure_line_break_no_block_embedded_branch(0);
-        short_used_not_covered_closure_line_break_block_embedded_branch(0);
-    }
-    short_used_covered_closure_macro(0);
-    short_used_covered_closure_line_break_no_block_embedded_branch(0);
-    short_used_covered_closure_line_break_block_embedded_branch(0);
-}
diff --git a/tests/run-coverage/closure_bug.rs b/tests/run-coverage/closure_bug.rs
deleted file mode 100644
index 739bc5f0b51..00000000000
--- a/tests/run-coverage/closure_bug.rs
+++ /dev/null
@@ -1,44 +0,0 @@
-// Regression test for #115930.
-// All of these closures are identical, and should produce identical output in
-// the coverage report. However, an unstable sort was causing them to be treated
-// inconsistently when preparing coverage spans.
-
-fn main() {
-    let truthy = std::env::args().len() == 1;
-
-    let a
-        =
-        |
-        |
-        if truthy { true } else { false };
-
-    a();
-    if truthy { a(); }
-
-    let b
-        =
-        |
-        |
-        if truthy { true } else { false };
-
-    b();
-    if truthy { b(); }
-
-    let c
-        =
-        |
-        |
-        if truthy { true } else { false };
-
-    c();
-    if truthy { c(); }
-
-    let d
-        =
-        |
-        |
-        if truthy { true } else { false };
-
-    d();
-    if truthy { d(); }
-}
diff --git a/tests/run-coverage/closure_macro.rs b/tests/run-coverage/closure_macro.rs
deleted file mode 100644
index 9b289141c2e..00000000000
--- a/tests/run-coverage/closure_macro.rs
+++ /dev/null
@@ -1,40 +0,0 @@
-// compile-flags: --edition=2018
-#![feature(coverage_attribute)]
-
-macro_rules! bail {
-    ($msg:literal $(,)?) => {
-        if $msg.len() > 0 {
-            println!("no msg");
-        } else {
-            println!($msg);
-        }
-        return Err(String::from($msg));
-    };
-}
-
-macro_rules! on_error {
-    ($value:expr, $error_message:expr) => {
-        $value.or_else(|e| { // FIXME(85000): no coverage in closure macros
-            let message = format!($error_message, e);
-            if message.len() > 0 {
-                println!("{}", message);
-                Ok(String::from("ok"))
-            } else {
-                bail!("error");
-            }
-        })
-    };
-}
-
-fn load_configuration_files() -> Result<String, String> {
-    Ok(String::from("config"))
-}
-
-pub fn main() -> Result<(), String> {
-    println!("Starting service");
-    let config = on_error!(load_configuration_files(), "Error loading configs: {}")?;
-
-    let startup_delay_duration = String::from("arg");
-    let _ = (config, startup_delay_duration);
-    Ok(())
-}
diff --git a/tests/run-coverage/closure_macro_async.rs b/tests/run-coverage/closure_macro_async.rs
deleted file mode 100644
index b4275599e59..00000000000
--- a/tests/run-coverage/closure_macro_async.rs
+++ /dev/null
@@ -1,77 +0,0 @@
-// compile-flags: --edition=2018
-#![feature(coverage_attribute)]
-
-macro_rules! bail {
-    ($msg:literal $(,)?) => {
-        if $msg.len() > 0 {
-            println!("no msg");
-        } else {
-            println!($msg);
-        }
-        return Err(String::from($msg));
-    };
-}
-
-macro_rules! on_error {
-    ($value:expr, $error_message:expr) => {
-        $value.or_else(|e| { // FIXME(85000): no coverage in closure macros
-            let message = format!($error_message, e);
-            if message.len() > 0 {
-                println!("{}", message);
-                Ok(String::from("ok"))
-            } else {
-                bail!("error");
-            }
-        })
-    };
-}
-
-fn load_configuration_files() -> Result<String, String> {
-    Ok(String::from("config"))
-}
-
-pub async fn test() -> Result<(), String> {
-    println!("Starting service");
-    let config = on_error!(load_configuration_files(), "Error loading configs: {}")?;
-
-    let startup_delay_duration = String::from("arg");
-    let _ = (config, startup_delay_duration);
-    Ok(())
-}
-
-#[coverage(off)]
-fn main() {
-    executor::block_on(test()).unwrap();
-}
-
-mod executor {
-    use core::{
-        future::Future,
-        pin::Pin,
-        task::{Context, Poll, RawWaker, RawWakerVTable, Waker},
-    };
-
-    #[coverage(off)]
-    pub fn block_on<F: Future>(mut future: F) -> F::Output {
-        let mut future = unsafe { Pin::new_unchecked(&mut future) };
-        use std::hint::unreachable_unchecked;
-        static VTABLE: RawWakerVTable = RawWakerVTable::new(
-            #[coverage(off)]
-            |_| unsafe { unreachable_unchecked() }, // clone
-            #[coverage(off)]
-            |_| unsafe { unreachable_unchecked() }, // wake
-            #[coverage(off)]
-            |_| unsafe { unreachable_unchecked() }, // wake_by_ref
-            #[coverage(off)]
-            |_| (),
-        );
-        let waker = unsafe { Waker::from_raw(RawWaker::new(core::ptr::null(), &VTABLE)) };
-        let mut context = Context::from_waker(&waker);
-
-        loop {
-            if let Poll::Ready(val) = future.as_mut().poll(&mut context) {
-                break val;
-            }
-        }
-    }
-}
diff --git a/tests/run-coverage/conditions.rs b/tests/run-coverage/conditions.rs
deleted file mode 100644
index fa7f2a116c2..00000000000
--- a/tests/run-coverage/conditions.rs
+++ /dev/null
@@ -1,86 +0,0 @@
-#![allow(unused_assignments, unused_variables)]
-
-fn main() {
-    let mut countdown = 0;
-    if true {
-        countdown = 10;
-    }
-
-    const B: u32 = 100;
-    let x = if countdown > 7 {
-        countdown -= 4;
-        B
-    } else if countdown > 2 {
-        if countdown < 1 || countdown > 5 || countdown != 9 {
-            countdown = 0;
-        }
-        countdown -= 5;
-        countdown
-    } else {
-        return;
-    };
-
-    let mut countdown = 0;
-    if true {
-        countdown = 10;
-    }
-
-    if countdown > 7 {
-        countdown -= 4;
-    } else if countdown > 2 {
-        if countdown < 1 || countdown > 5 || countdown != 9 {
-            countdown = 0;
-        }
-        countdown -= 5;
-    } else {
-        return;
-    }
-
-    if true {
-        let mut countdown = 0;
-        if true {
-            countdown = 10;
-        }
-
-        if countdown > 7 {
-            countdown -= 4;
-        }
-        else if countdown > 2 {
-            if countdown < 1 || countdown > 5 || countdown != 9 {
-                countdown = 0;
-            }
-            countdown -= 5;
-        } else {
-            return;
-        }
-    }
-
-    let mut countdown = 0;
-    if true {
-        countdown = 1;
-    }
-
-    let z = if countdown > 7 {
-        countdown -= 4;
-    } else if countdown > 2 {
-        if countdown < 1 || countdown > 5 || countdown != 9 {
-            countdown = 0;
-        }
-        countdown -= 5;
-    } else {
-        let should_be_reachable = countdown;
-        println!("reached");
-        return;
-    };
-
-    let w = if countdown > 7 {
-        countdown -= 4;
-    } else if countdown > 2 {
-        if countdown < 1 || countdown > 5 || countdown != 9 {
-            countdown = 0;
-        }
-        countdown -= 5;
-    } else {
-        return;
-    };
-}
diff --git a/tests/run-coverage/continue.rs b/tests/run-coverage/continue.rs
deleted file mode 100644
index 624aa98341b..00000000000
--- a/tests/run-coverage/continue.rs
+++ /dev/null
@@ -1,69 +0,0 @@
-#![allow(unused_assignments, unused_variables)]
-
-fn main() {
-    let is_true = std::env::args().len() == 1;
-
-    let mut x = 0;
-    for _ in 0..10 {
-        match is_true {
-            true => {
-                continue;
-            }
-            _ => {
-                x = 1;
-            }
-        }
-        x = 3;
-    }
-    for _ in 0..10 {
-        match is_true {
-            false => {
-                x = 1;
-            }
-            _ => {
-                continue;
-            }
-        }
-        x = 3;
-    }
-    for _ in 0..10 {
-        match is_true {
-            true => {
-                x = 1;
-            }
-            _ => {
-                continue;
-            }
-        }
-        x = 3;
-    }
-    for _ in 0..10 {
-        if is_true {
-            continue;
-        }
-        x = 3;
-    }
-    for _ in 0..10 {
-        match is_true {
-            false => {
-                x = 1;
-            }
-            _ => {
-                let _ = x;
-            }
-        }
-        x = 3;
-    }
-    for _ in 0..10 {
-        match is_true {
-            false => {
-                x = 1;
-            }
-            _ => {
-                break;
-            }
-        }
-        x = 3;
-    }
-    let _ = x;
-}
diff --git a/tests/run-coverage/coroutine.rs b/tests/run-coverage/coroutine.rs
deleted file mode 100644
index 86d19af6f4f..00000000000
--- a/tests/run-coverage/coroutine.rs
+++ /dev/null
@@ -1,30 +0,0 @@
-#![feature(coroutines, coroutine_trait)]
-
-use std::ops::{Coroutine, CoroutineState};
-use std::pin::Pin;
-
-// The following implementation of a function called from a `yield` statement
-// (apparently requiring the Result and the `String` type or constructor)
-// creates conditions where the `coroutine::StateTransform` MIR transform will
-// drop all `Counter` `Coverage` statements from a MIR. `simplify.rs` has logic
-// to handle this condition, and still report dead block coverage.
-fn get_u32(val: bool) -> Result<u32, String> {
-    if val { Ok(1) } else { Err(String::from("some error")) }
-}
-
-fn main() {
-    let is_true = std::env::args().len() == 1;
-    let mut coroutine = || {
-        yield get_u32(is_true);
-        return "foo";
-    };
-
-    match Pin::new(&mut coroutine).resume(()) {
-        CoroutineState::Yielded(Ok(1)) => {}
-        _ => panic!("unexpected return from resume"),
-    }
-    match Pin::new(&mut coroutine).resume(()) {
-        CoroutineState::Complete("foo") => {}
-        _ => panic!("unexpected return from resume"),
-    }
-}
diff --git a/tests/run-coverage/dead_code.rs b/tests/run-coverage/dead_code.rs
deleted file mode 100644
index 3492712a6f9..00000000000
--- a/tests/run-coverage/dead_code.rs
+++ /dev/null
@@ -1,37 +0,0 @@
-#![allow(dead_code, unused_assignments, unused_variables)]
-
-pub fn unused_pub_fn_not_in_library() {
-    // Initialize test constants in a way that cannot be determined at compile time, to ensure
-    // rustc and LLVM cannot optimize out statements (or coverage counters) downstream from
-    // dependent conditions.
-    let is_true = std::env::args().len() == 1;
-
-    let mut countdown = 0;
-    if is_true {
-        countdown = 10;
-    }
-}
-
-fn unused_fn() {
-    // Initialize test constants in a way that cannot be determined at compile time, to ensure
-    // rustc and LLVM cannot optimize out statements (or coverage counters) downstream from
-    // dependent conditions.
-    let is_true = std::env::args().len() == 1;
-
-    let mut countdown = 0;
-    if is_true {
-        countdown = 10;
-    }
-}
-
-fn main() {
-    // Initialize test constants in a way that cannot be determined at compile time, to ensure
-    // rustc and LLVM cannot optimize out statements (or coverage counters) downstream from
-    // dependent conditions.
-    let is_true = std::env::args().len() == 1;
-
-    let mut countdown = 0;
-    if is_true {
-        countdown = 10;
-    }
-}
diff --git a/tests/run-coverage/drop_trait.rs b/tests/run-coverage/drop_trait.rs
deleted file mode 100644
index 7b062719c6b..00000000000
--- a/tests/run-coverage/drop_trait.rs
+++ /dev/null
@@ -1,33 +0,0 @@
-#![allow(unused_assignments)]
-// failure-status: 1
-
-struct Firework {
-    strength: i32,
-}
-
-impl Drop for Firework {
-    fn drop(&mut self) {
-        println!("BOOM times {}!!!", self.strength);
-    }
-}
-
-fn main() -> Result<(), u8> {
-    let _firecracker = Firework { strength: 1 };
-
-    let _tnt = Firework { strength: 100 };
-
-    if true {
-        println!("Exiting with error...");
-        return Err(1);
-    }
-
-    let _ = Firework { strength: 1000 };
-
-    Ok(())
-}
-
-// Expected program output:
-//   Exiting with error...
-//   BOOM times 100!!!
-//   BOOM times 1!!!
-//   Error: 1
diff --git a/tests/run-coverage/fn_sig_into_try.rs b/tests/run-coverage/fn_sig_into_try.rs
deleted file mode 100644
index 92850c8a188..00000000000
--- a/tests/run-coverage/fn_sig_into_try.rs
+++ /dev/null
@@ -1,41 +0,0 @@
-#![feature(coverage_attribute)]
-// compile-flags: --edition=2021
-
-// Regression test for inconsistent handling of function signature spans that
-// are followed by code using the `?` operator.
-//
-// For each of these similar functions, the line containing the function
-// signature should be handled in the same way.
-
-fn a() -> Option<i32>
-{
-    Some(7i32);
-    Some(0)
-}
-
-fn b() -> Option<i32>
-{
-    Some(7i32)?;
-    Some(0)
-}
-
-fn c() -> Option<i32>
-{
-    let _ = Some(7i32)?;
-    Some(0)
-}
-
-fn d() -> Option<i32>
-{
-    let _: () = ();
-    Some(7i32)?;
-    Some(0)
-}
-
-#[coverage(off)]
-fn main() {
-    a();
-    b();
-    c();
-    d();
-}
diff --git a/tests/run-coverage/generics.rs b/tests/run-coverage/generics.rs
deleted file mode 100644
index bf4c2d8d685..00000000000
--- a/tests/run-coverage/generics.rs
+++ /dev/null
@@ -1,44 +0,0 @@
-#![allow(unused_assignments)]
-// failure-status: 1
-
-struct Firework<T> where T: Copy + std::fmt::Display {
-    strength: T,
-}
-
-impl<T> Firework<T> where T: Copy + std::fmt::Display {
-    #[inline(always)]
-    fn set_strength(&mut self, new_strength: T) {
-        self.strength = new_strength;
-    }
-}
-
-impl<T> Drop for Firework<T> where T: Copy + std::fmt::Display {
-    #[inline(always)]
-    fn drop(&mut self) {
-        println!("BOOM times {}!!!", self.strength);
-    }
-}
-
-fn main() -> Result<(), u8> {
-    let mut firecracker = Firework { strength: 1 };
-    firecracker.set_strength(2);
-
-    let mut tnt = Firework { strength: 100.1 };
-    tnt.set_strength(200.1);
-    tnt.set_strength(300.3);
-
-    if true {
-        println!("Exiting with error...");
-        return Err(1);
-    }
-
-    let _ = Firework { strength: 1000 };
-
-    Ok(())
-}
-
-// Expected program output:
-//   Exiting with error...
-//   BOOM times 100!!!
-//   BOOM times 1!!!
-//   Error: 1
diff --git a/tests/run-coverage/if.rs b/tests/run-coverage/if.rs
deleted file mode 100644
index 8ad5042ff7b..00000000000
--- a/tests/run-coverage/if.rs
+++ /dev/null
@@ -1,28 +0,0 @@
-#![allow(unused_assignments, unused_variables)]
-
-fn main() {
-    // Initialize test constants in a way that cannot be determined at compile time, to ensure
-    // rustc and LLVM cannot optimize out statements (or coverage counters) downstream from
-    // dependent conditions.
-    let
-    is_true
-    =
-        std::env::args().len()
-    ==
-        1
-    ;
-    let
-        mut
-    countdown
-    =
-        0
-    ;
-    if
-        is_true
-    {
-        countdown
-        =
-            10
-        ;
-    }
-}
diff --git a/tests/run-coverage/if_else.rs b/tests/run-coverage/if_else.rs
deleted file mode 100644
index 3244e1e3afd..00000000000
--- a/tests/run-coverage/if_else.rs
+++ /dev/null
@@ -1,40 +0,0 @@
-#![allow(unused_assignments, unused_variables)]
-
-fn main() {
-    // Initialize test constants in a way that cannot be determined at compile time, to ensure
-    // rustc and LLVM cannot optimize out statements (or coverage counters) downstream from
-    // dependent conditions.
-    let is_true = std::env::args().len() == 1;
-
-    let mut countdown = 0;
-    if
-        is_true
-    {
-        countdown
-        =
-            10
-        ;
-    }
-    else // Note coverage region difference without semicolon
-    {
-        countdown
-        =
-            100
-    }
-
-    if
-        is_true
-    {
-        countdown
-        =
-            10
-        ;
-    }
-    else
-    {
-        countdown
-        =
-            100
-        ;
-    }
-}
diff --git a/tests/run-coverage/inline-dead.rs b/tests/run-coverage/inline-dead.rs
deleted file mode 100644
index 854fa062967..00000000000
--- a/tests/run-coverage/inline-dead.rs
+++ /dev/null
@@ -1,27 +0,0 @@
-// Regression test for issue #98833.
-// compile-flags: -Zinline-mir -Cdebug-assertions=off
-
-fn main() {
-    println!("{}", live::<false>());
-
-    let f = |x: bool| {
-        debug_assert!(
-            x
-        );
-    };
-    f(false);
-}
-
-#[inline]
-fn live<const B: bool>() -> u32 {
-    if B {
-        dead()
-    } else {
-        0
-    }
-}
-
-#[inline]
-fn dead() -> u32 {
-    42
-}
diff --git a/tests/run-coverage/inline.rs b/tests/run-coverage/inline.rs
deleted file mode 100644
index 9cfab9ddbad..00000000000
--- a/tests/run-coverage/inline.rs
+++ /dev/null
@@ -1,51 +0,0 @@
-// compile-flags: -Zinline-mir
-
-use std::fmt::Display;
-
-fn main() {
-    permutations(&['a', 'b', 'c']);
-}
-
-#[inline(always)]
-fn permutations<T: Copy + Display>(xs: &[T]) {
-    let mut ys = xs.to_owned();
-    permutate(&mut ys, 0);
-}
-
-fn permutate<T: Copy + Display>(xs: &mut [T], k: usize) {
-    let n = length(xs);
-    if k == n {
-        display(xs);
-    } else if k < n {
-        for i in k..n {
-            swap(xs, i, k);
-            permutate(xs, k + 1);
-            swap(xs, i, k);
-        }
-    } else {
-        error();
-    }
-}
-
-fn length<T>(xs: &[T]) -> usize {
-    xs.len()
-}
-
-#[inline]
-fn swap<T: Copy>(xs: &mut [T], i: usize, j: usize) {
-    let t = xs[i];
-    xs[i] = xs[j];
-    xs[j] = t;
-}
-
-fn display<T: Display>(xs: &[T]) {
-    for x in xs {
-        print!("{}", x);
-    }
-    println!();
-}
-
-#[inline(always)]
-fn error() {
-    panic!("error");
-}
diff --git a/tests/run-coverage/inner_items.rs b/tests/run-coverage/inner_items.rs
deleted file mode 100644
index bcb62b3031c..00000000000
--- a/tests/run-coverage/inner_items.rs
+++ /dev/null
@@ -1,57 +0,0 @@
-#![allow(unused_assignments, unused_variables, dead_code)]
-
-fn main() {
-    // Initialize test constants in a way that cannot be determined at compile time, to ensure
-    // rustc and LLVM cannot optimize out statements (or coverage counters) downstream from
-    // dependent conditions.
-    let is_true = std::env::args().len() == 1;
-
-    let mut countdown = 0;
-    if is_true {
-        countdown = 10;
-    }
-
-    mod in_mod {
-        const IN_MOD_CONST: u32 = 1000;
-    }
-
-    fn in_func(a: u32) {
-        let b = 1;
-        let c = a + b;
-        println!("c = {}", c)
-    }
-
-    struct InStruct {
-        in_struct_field: u32,
-    }
-
-    const IN_CONST: u32 = 1234;
-
-    trait InTrait {
-        fn trait_func(&mut self, incr: u32);
-
-        fn default_trait_func(&mut self) {
-            in_func(IN_CONST);
-            self.trait_func(IN_CONST);
-        }
-    }
-
-    impl InTrait for InStruct {
-        fn trait_func(&mut self, incr: u32) {
-            self.in_struct_field += incr;
-            in_func(self.in_struct_field);
-        }
-    }
-
-    type InType = String;
-
-    if is_true {
-        in_func(countdown);
-    }
-
-    let mut val = InStruct {
-        in_struct_field: 101,
-    };
-
-    val.default_trait_func();
-}
diff --git a/tests/run-coverage/issue-83601.rs b/tests/run-coverage/issue-83601.rs
deleted file mode 100644
index 0b72a81947c..00000000000
--- a/tests/run-coverage/issue-83601.rs
+++ /dev/null
@@ -1,14 +0,0 @@
-// Shows that rust-lang/rust/83601 is resolved
-
-#[derive(Debug, PartialEq, Eq)]
-struct Foo(u32);
-
-fn main() {
-    let bar = Foo(1);
-    assert_eq!(bar, Foo(1));
-    let baz = Foo(0);
-    assert_ne!(baz, Foo(1));
-    println!("{:?}", Foo(1));
-    println!("{:?}", bar);
-    println!("{:?}", baz);
-}
diff --git a/tests/run-coverage/issue-84561.rs b/tests/run-coverage/issue-84561.rs
deleted file mode 100644
index facf5b5b4cf..00000000000
--- a/tests/run-coverage/issue-84561.rs
+++ /dev/null
@@ -1,182 +0,0 @@
-// This demonstrated Issue #84561: function-like macros produce unintuitive coverage results.
-
-// failure-status: 101
-#[derive(PartialEq, Eq)]
-struct Foo(u32);
-fn test3() {
-    let is_true = std::env::args().len() == 1;
-    let bar = Foo(1);
-    assert_eq!(bar, Foo(1));
-    let baz = Foo(0);
-    assert_ne!(baz, Foo(1));
-    println!("{:?}", Foo(1));
-    println!("{:?}", bar);
-    println!("{:?}", baz);
-
-    assert_eq!(Foo(1), Foo(1));
-    assert_ne!(Foo(0), Foo(1));
-    assert_eq!(Foo(2), Foo(2));
-    let bar = Foo(0);
-    assert_ne!(bar, Foo(3));
-    assert_ne!(Foo(0), Foo(4));
-    assert_eq!(Foo(3), Foo(3), "with a message");
-    println!("{:?}", bar);
-    println!("{:?}", Foo(1));
-
-    assert_ne!(Foo(0), Foo(5), "{}", if is_true { "true message" } else { "false message" });
-    assert_ne!(
-        Foo(0)
-        ,
-        Foo(5)
-        ,
-        "{}"
-        ,
-        if
-        is_true
-        {
-            "true message"
-        } else {
-            "false message"
-        }
-    );
-
-    let is_true = std::env::args().len() == 1;
-
-    assert_eq!(
-        Foo(1),
-        Foo(1)
-    );
-    assert_ne!(
-        Foo(0),
-        Foo(1)
-    );
-    assert_eq!(
-        Foo(2),
-        Foo(2)
-    );
-    let bar = Foo(1);
-    assert_ne!(
-        bar,
-        Foo(3)
-    );
-    if is_true {
-        assert_ne!(
-            Foo(0),
-            Foo(4)
-        );
-    } else {
-        assert_eq!(
-            Foo(3),
-            Foo(3)
-        );
-    }
-    if is_true {
-        assert_ne!(
-            Foo(0),
-            Foo(4),
-            "with a message"
-        );
-    } else {
-        assert_eq!(
-            Foo(3),
-            Foo(3),
-            "with a message"
-        );
-    }
-    assert_ne!(
-        if is_true {
-            Foo(0)
-        } else {
-            Foo(1)
-        },
-        Foo(5)
-    );
-    assert_ne!(
-        Foo(5),
-        if is_true {
-            Foo(0)
-        } else {
-            Foo(1)
-        }
-    );
-    assert_ne!(
-        if is_true {
-            assert_eq!(
-                Foo(3),
-                Foo(3)
-            );
-            Foo(0)
-        } else {
-            assert_ne!(
-                if is_true {
-                    Foo(0)
-                } else {
-                    Foo(1)
-                },
-                Foo(5)
-            );
-            Foo(1)
-        },
-        Foo(5),
-        "with a message"
-    );
-    assert_eq!(
-        Foo(1),
-        Foo(3),
-        "this assert should fail"
-    );
-    assert_eq!(
-        Foo(3),
-        Foo(3),
-        "this assert should not be reached"
-    );
-}
-
-impl std::fmt::Debug for Foo {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        write!(f, "try and succeed")?;
-        Ok(())
-    }
-}
-
-static mut DEBUG_LEVEL_ENABLED: bool = false;
-
-macro_rules! debug {
-    ($($arg:tt)+) => (
-        if unsafe { DEBUG_LEVEL_ENABLED } {
-            println!($($arg)+);
-        }
-    );
-}
-
-fn test1() {
-    debug!("debug is enabled");
-    debug!("debug is enabled");
-    let _ = 0;
-    debug!("debug is enabled");
-    unsafe {
-        DEBUG_LEVEL_ENABLED = true;
-    }
-    debug!("debug is enabled");
-}
-
-macro_rules! call_debug {
-    ($($arg:tt)+) => (
-        fn call_print(s: &str) {
-            print!("{}", s);
-        }
-
-        call_print("called from call_debug: ");
-        debug!($($arg)+);
-    );
-}
-
-fn test2() {
-    call_debug!("debug is enabled");
-}
-
-fn main() {
-    test1();
-    test2();
-    test3();
-}
diff --git a/tests/run-coverage/issue-93054.rs b/tests/run-coverage/issue-93054.rs
deleted file mode 100644
index da546cfeef8..00000000000
--- a/tests/run-coverage/issue-93054.rs
+++ /dev/null
@@ -1,30 +0,0 @@
-#![allow(dead_code, unreachable_code)]
-
-// Regression test for #93054: Functions using uninhabited types often only have a single,
-// unreachable basic block which doesn't get instrumented. This should not cause llvm-cov to fail.
-// Since these kinds functions can't be invoked anyway, it's ok to not have coverage data for them.
-
-// compile-flags: --edition=2021
-
-enum Never {}
-
-impl Never {
-    fn foo(self) {
-        match self {}
-        make().map(|never| match never {});
-    }
-
-    fn bar(&self) {
-        match *self {}
-    }
-}
-
-async fn foo2(never: Never) {
-    match never {}
-}
-
-fn make() -> Option<Never> {
-    None
-}
-
-fn main() {}
diff --git a/tests/run-coverage/lazy_boolean.rs b/tests/run-coverage/lazy_boolean.rs
deleted file mode 100644
index bb6219e851c..00000000000
--- a/tests/run-coverage/lazy_boolean.rs
+++ /dev/null
@@ -1,61 +0,0 @@
-#![allow(unused_assignments, unused_variables)]
-
-fn main() {
-    // Initialize test constants in a way that cannot be determined at compile time, to ensure
-    // rustc and LLVM cannot optimize out statements (or coverage counters) downstream from
-    // dependent conditions.
-    let is_true = std::env::args().len() == 1;
-
-    let (mut a, mut b, mut c) = (0, 0, 0);
-    if is_true {
-        a = 1;
-        b = 10;
-        c = 100;
-    }
-    let
-        somebool
-        =
-            a < b
-        ||
-            b < c
-    ;
-    let
-        somebool
-        =
-            b < a
-        ||
-            b < c
-    ;
-    let somebool = a < b && b < c;
-    let somebool = b < a && b < c;
-
-    if
-        !
-        is_true
-    {
-        a = 2
-        ;
-    }
-
-    if
-        is_true
-    {
-        b = 30
-        ;
-    }
-    else
-    {
-        c = 400
-        ;
-    }
-
-    if !is_true {
-        a = 2;
-    }
-
-    if is_true {
-        b = 30;
-    } else {
-        c = 400;
-    }
-}
diff --git a/tests/run-coverage/loop_break_value.rs b/tests/run-coverage/loop_break_value.rs
deleted file mode 100644
index dbc4fad7a23..00000000000
--- a/tests/run-coverage/loop_break_value.rs
+++ /dev/null
@@ -1,13 +0,0 @@
-#![allow(unused_assignments, unused_variables)]
-
-fn main() {
-    let result
-        =
-            loop
-        {
-            break
-            10
-            ;
-        }
-    ;
-}
diff --git a/tests/run-coverage/loops_branches.rs b/tests/run-coverage/loops_branches.rs
deleted file mode 100644
index f3a343bcc1f..00000000000
--- a/tests/run-coverage/loops_branches.rs
+++ /dev/null
@@ -1,60 +0,0 @@
-#![allow(unused_assignments, unused_variables, while_true)]
-
-// This test confirms that (1) unexecuted infinite loops are handled correctly by the
-// InstrumentCoverage MIR pass; and (2) Counter Expressions that subtract from zero can be dropped.
-
-struct DebugTest;
-
-impl std::fmt::Debug for DebugTest {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        if true {
-            if false {
-                while true {}
-            }
-            write!(f, "cool")?;
-        } else {
-        }
-
-        for i in 0..10 {
-            if true {
-                if false {
-                    while true {}
-                }
-                write!(f, "cool")?;
-            } else {
-            }
-        }
-        Ok(())
-    }
-}
-
-struct DisplayTest;
-
-impl std::fmt::Display for DisplayTest {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        if false {
-        } else {
-            if false {
-                while true {}
-            }
-            write!(f, "cool")?;
-        }
-        for i in 0..10 {
-            if false {
-            } else {
-                if false {
-                    while true {}
-                }
-                write!(f, "cool")?;
-            }
-        }
-        Ok(())
-    }
-}
-
-fn main() {
-    let debug_test = DebugTest;
-    println!("{:?}", debug_test);
-    let display_test = DisplayTest;
-    println!("{}", display_test);
-}
diff --git a/tests/run-coverage/match_or_pattern.rs b/tests/run-coverage/match_or_pattern.rs
deleted file mode 100644
index ab7aee51d1b..00000000000
--- a/tests/run-coverage/match_or_pattern.rs
+++ /dev/null
@@ -1,43 +0,0 @@
-fn main() {
-    // Initialize test constants in a way that cannot be determined at compile time, to ensure
-    // rustc and LLVM cannot optimize out statements (or coverage counters) downstream from
-    // dependent conditions.
-    let is_true = std::env::args().len() == 1;
-
-    let mut a: u8 = 0;
-    let mut b: u8 = 0;
-    if is_true {
-        a = 2;
-        b = 0;
-    }
-    match (a, b) {
-        // Or patterns generate MIR `SwitchInt` with multiple targets to the same `BasicBlock`.
-        // This test confirms a fix for Issue #79569.
-        (0 | 1, 2 | 3) => {}
-        _ => {}
-    }
-    if is_true {
-        a = 0;
-        b = 0;
-    }
-    match (a, b) {
-        (0 | 1, 2 | 3) => {}
-        _ => {}
-    }
-    if is_true {
-        a = 2;
-        b = 2;
-    }
-    match (a, b) {
-        (0 | 1, 2 | 3) => {}
-        _ => {}
-    }
-    if is_true {
-        a = 0;
-        b = 2;
-    }
-    match (a, b) {
-        (0 | 1, 2 | 3) => {}
-        _ => {}
-    }
-}
diff --git a/tests/run-coverage/nested_loops.rs b/tests/run-coverage/nested_loops.rs
deleted file mode 100644
index 4c7c7842796..00000000000
--- a/tests/run-coverage/nested_loops.rs
+++ /dev/null
@@ -1,25 +0,0 @@
-fn main() {
-    let is_true = std::env::args().len() == 1;
-    let mut countdown = 10;
-
-    'outer: while countdown > 0 {
-        let mut a = 100;
-        let mut b = 100;
-        for _ in 0..50 {
-            if a < 30 {
-                break;
-            }
-            a -= 5;
-            b -= 5;
-            if b < 90 {
-                a -= 10;
-                if is_true {
-                    break 'outer;
-                } else {
-                    a -= 2;
-                }
-            }
-        }
-        countdown -= 1;
-    }
-}
diff --git a/tests/run-coverage/no_cov_crate.rs b/tests/run-coverage/no_cov_crate.rs
deleted file mode 100644
index e12e4bc55e3..00000000000
--- a/tests/run-coverage/no_cov_crate.rs
+++ /dev/null
@@ -1,88 +0,0 @@
-// Enables `coverage(off)` on the entire crate
-#![feature(coverage_attribute)]
-
-#[coverage(off)]
-fn do_not_add_coverage_1() {
-    println!("called but not covered");
-}
-
-fn do_not_add_coverage_2() {
-    #![coverage(off)]
-    println!("called but not covered");
-}
-
-#[coverage(off)]
-#[allow(dead_code)]
-fn do_not_add_coverage_not_called() {
-    println!("not called and not covered");
-}
-
-fn add_coverage_1() {
-    println!("called and covered");
-}
-
-fn add_coverage_2() {
-    println!("called and covered");
-}
-
-#[allow(dead_code)]
-fn add_coverage_not_called() {
-    println!("not called but covered");
-}
-
-// FIXME: These test-cases illustrate confusing results of nested functions.
-// See https://github.com/rust-lang/rust/issues/93319
-mod nested_fns {
-    #[coverage(off)]
-    pub fn outer_not_covered(is_true: bool) {
-        fn inner(is_true: bool) {
-            if is_true {
-                println!("called and covered");
-            } else {
-                println!("absolutely not covered");
-            }
-        }
-        println!("called but not covered");
-        inner(is_true);
-    }
-
-    pub fn outer(is_true: bool) {
-        println!("called and covered");
-        inner_not_covered(is_true);
-
-        #[coverage(off)]
-        fn inner_not_covered(is_true: bool) {
-            if is_true {
-                println!("called but not covered");
-            } else {
-                println!("absolutely not covered");
-            }
-        }
-    }
-
-    pub fn outer_both_covered(is_true: bool) {
-        println!("called and covered");
-        inner(is_true);
-
-        fn inner(is_true: bool) {
-            if is_true {
-                println!("called and covered");
-            } else {
-                println!("absolutely not covered");
-            }
-        }
-    }
-}
-
-fn main() {
-    let is_true = std::env::args().len() == 1;
-
-    do_not_add_coverage_1();
-    do_not_add_coverage_2();
-    add_coverage_1();
-    add_coverage_2();
-
-    nested_fns::outer_not_covered(is_true);
-    nested_fns::outer(is_true);
-    nested_fns::outer_both_covered(is_true);
-}
diff --git a/tests/run-coverage/panic_unwind.rs b/tests/run-coverage/panic_unwind.rs
deleted file mode 100644
index 638d2eb6aaa..00000000000
--- a/tests/run-coverage/panic_unwind.rs
+++ /dev/null
@@ -1,31 +0,0 @@
-#![allow(unused_assignments)]
-// failure-status: 101
-
-fn might_panic(should_panic: bool) {
-    if should_panic {
-        println!("panicking...");
-        panic!("panics");
-    } else {
-        println!("Don't Panic");
-    }
-}
-
-fn main() -> Result<(), u8> {
-    let mut countdown = 10;
-    while countdown > 0 {
-        if countdown == 1 {
-            might_panic(true);
-        } else if countdown < 5 {
-            might_panic(false);
-        }
-        countdown -= 1;
-    }
-    Ok(())
-}
-
-// Notes:
-//   1. Compare this program and its coverage results to those of the similar tests `abort.rs` and
-//      `try_error_result.rs`.
-//   2. Since the `panic_unwind.rs` test is allowed to unwind, it is also allowed to execute the
-//      normal program exit cleanup, including writing out the current values of the coverage
-//      counters.
diff --git a/tests/run-coverage/partial_eq.rs b/tests/run-coverage/partial_eq.rs
deleted file mode 100644
index dd8b42c18ce..00000000000
--- a/tests/run-coverage/partial_eq.rs
+++ /dev/null
@@ -1,46 +0,0 @@
-// This test confirms an earlier problem was resolved, supporting the MIR graph generated by the
-// structure of this test.
-
-#[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord)]
-pub struct Version {
-    major: usize,
-    minor: usize,
-    patch: usize,
-}
-
-impl Version {
-    pub fn new(major: usize, minor: usize, patch: usize) -> Self {
-        Self {
-            major,
-            minor,
-            patch,
-        }
-    }
-}
-
-fn main() {
-    let version_3_2_1 = Version::new(3, 2, 1);
-    let version_3_3_0 = Version::new(3, 3, 0);
-
-    println!("{:?} < {:?} = {}", version_3_2_1, version_3_3_0, version_3_2_1 < version_3_3_0);
-}
-
-/*
-
-This test verifies a bug was fixed that otherwise generated this error:
-
-thread 'rustc' panicked at 'No counters provided the source_hash for function:
-    Instance {
-        def: Item(WithOptConstParam {
-            did: DefId(0:101 ~ autocfg[c44a]::version::{impl#2}::partial_cmp),
-            const_param_did: None
-        }),
-        args: []
-    }'
-The `PartialOrd` derived by `Version` happened to generate a MIR that generated coverage
-without a code region associated with any `Counter`. Code regions were associated with at least
-one expression, which is allowed, but the `function_source_hash` was only passed to the codegen
-(coverage mapgen) phase from a `Counter`s code region. A new method was added to pass the
-`function_source_hash` without a code region, if necessary.
-
-*/
diff --git a/tests/run-coverage/simple_loop.rs b/tests/run-coverage/simple_loop.rs
deleted file mode 100644
index 6f7f23475b8..00000000000
--- a/tests/run-coverage/simple_loop.rs
+++ /dev/null
@@ -1,35 +0,0 @@
-#![allow(unused_assignments)]
-
-fn main() {
-    // Initialize test constants in a way that cannot be determined at compile time, to ensure
-    // rustc and LLVM cannot optimize out statements (or coverage counters) downstream from
-    // dependent conditions.
-    let is_true = std::env::args().len() == 1;
-
-    let mut countdown = 0;
-
-    if
-        is_true
-    {
-        countdown
-        =
-            10
-        ;
-    }
-
-    loop
-    {
-        if
-            countdown
-                ==
-            0
-        {
-            break
-            ;
-        }
-        countdown
-        -=
-        1
-        ;
-    }
-}
diff --git a/tests/run-coverage/simple_match.rs b/tests/run-coverage/simple_match.rs
deleted file mode 100644
index be99e59a826..00000000000
--- a/tests/run-coverage/simple_match.rs
+++ /dev/null
@@ -1,43 +0,0 @@
-#![allow(unused_assignments, unused_variables)]
-
-fn main() {
-    // Initialize test constants in a way that cannot be determined at compile time, to ensure
-    // rustc and LLVM cannot optimize out statements (or coverage counters) downstream from
-    // dependent conditions.
-    let is_true = std::env::args().len() == 1;
-
-    let mut countdown = 1;
-    if is_true {
-        countdown = 0;
-    }
-
-    for
-        _
-    in
-        0..2
-    {
-        let z
-        ;
-        match
-            countdown
-        {
-            x
-            if
-                x
-                    <
-                1
-            =>
-            {
-                z = countdown
-                ;
-                let y = countdown
-                ;
-                countdown = 10
-                ;
-            }
-            _
-            =>
-            {}
-        }
-    }
-}
diff --git a/tests/run-coverage/test_harness.rs b/tests/run-coverage/test_harness.rs
deleted file mode 100644
index 12a755734c1..00000000000
--- a/tests/run-coverage/test_harness.rs
+++ /dev/null
@@ -1,10 +0,0 @@
-// Verify that the entry point injected by the test harness doesn't cause
-// weird artifacts in the coverage report (e.g. issue #10749).
-
-// compile-flags: --test
-
-#[allow(dead_code)]
-fn unused() {}
-
-#[test]
-fn my_test() {}
diff --git a/tests/run-coverage/tight_inf_loop.rs b/tests/run-coverage/tight_inf_loop.rs
deleted file mode 100644
index cef99027aaa..00000000000
--- a/tests/run-coverage/tight_inf_loop.rs
+++ /dev/null
@@ -1,5 +0,0 @@
-fn main() {
-    if false {
-        loop {}
-    }
-}
diff --git a/tests/run-coverage/try_error_result.rs b/tests/run-coverage/try_error_result.rs
deleted file mode 100644
index 557cbf22bfa..00000000000
--- a/tests/run-coverage/try_error_result.rs
+++ /dev/null
@@ -1,118 +0,0 @@
-#![allow(unused_assignments)]
-// failure-status: 1
-
-fn call(return_error: bool) -> Result<(), ()> {
-    if return_error {
-        Err(())
-    } else {
-        Ok(())
-    }
-}
-
-fn test1() -> Result<(), ()> {
-    let mut
-        countdown = 10
-    ;
-    for
-        _
-    in
-        0..10
-    {
-        countdown
-            -= 1
-        ;
-        if
-            countdown < 5
-        {
-            call(/*return_error=*/ true)?;
-            call(/*return_error=*/ false)?;
-        }
-        else
-        {
-            call(/*return_error=*/ false)?;
-        }
-    }
-    Ok(())
-}
-
-struct Thing1;
-impl Thing1 {
-    fn get_thing_2(&self, return_error: bool) -> Result<Thing2, ()> {
-        if return_error {
-            Err(())
-        } else {
-            Ok(Thing2 {})
-        }
-    }
-}
-
-struct Thing2;
-impl Thing2 {
-    fn call(&self, return_error: bool) -> Result<u32, ()> {
-        if return_error {
-            Err(())
-        } else {
-            Ok(57)
-        }
-    }
-}
-
-fn test2() -> Result<(), ()> {
-    let thing1 = Thing1{};
-    let mut
-        countdown = 10
-    ;
-    for
-        _
-    in
-        0..10
-    {
-        countdown
-            -= 1
-        ;
-        if
-            countdown < 5
-        {
-            thing1.get_thing_2(/*err=*/ false)?.call(/*err=*/ true).expect_err("call should fail");
-            thing1
-                .
-                get_thing_2(/*return_error=*/ false)
-                ?
-                .
-                call(/*return_error=*/ true)
-                .
-                expect_err(
-                    "call should fail"
-                );
-            let val = thing1.get_thing_2(/*return_error=*/ true)?.call(/*return_error=*/ true)?;
-            assert_eq!(val, 57);
-            let val = thing1.get_thing_2(/*return_error=*/ true)?.call(/*return_error=*/ false)?;
-            assert_eq!(val, 57);
-        }
-        else
-        {
-            let val = thing1.get_thing_2(/*return_error=*/ false)?.call(/*return_error=*/ false)?;
-            assert_eq!(val, 57);
-            let val = thing1
-                .get_thing_2(/*return_error=*/ false)?
-                .call(/*return_error=*/ false)?;
-            assert_eq!(val, 57);
-            let val = thing1
-                .get_thing_2(/*return_error=*/ false)
-                ?
-                .call(/*return_error=*/ false)
-                ?
-                ;
-            assert_eq!(val, 57);
-        }
-    }
-    Ok(())
-}
-
-fn main() -> Result<(), ()> {
-    test1().expect_err("test1 should fail");
-    test2()
-    ?
-    ;
-    Ok(())
-}
diff --git a/tests/run-coverage/unreachable.rs b/tests/run-coverage/unreachable.rs
deleted file mode 100644
index 6385bfa160d..00000000000
--- a/tests/run-coverage/unreachable.rs
+++ /dev/null
@@ -1,37 +0,0 @@
-#![feature(core_intrinsics)]
-#![feature(coverage_attribute)]
-// compile-flags: --edition=2021
-
-// <https://github.com/rust-lang/rust/issues/116171>
-// If we instrument a function for coverage, but all of its counter-increment
-// statements are removed by MIR optimizations, LLVM will think it isn't
-// instrumented and it will disappear from coverage maps and coverage reports.
-// Most MIR opts won't cause this because they tend not to remove statements
-// from bb0, but `UnreachablePropagation` can do so if it sees that bb0 ends
-// with `TerminatorKind::Unreachable`.
-
-use std::hint::{black_box, unreachable_unchecked};
-
-static UNREACHABLE_CLOSURE: fn() = || unsafe { unreachable_unchecked() };
-
-fn unreachable_function() {
-    unsafe { unreachable_unchecked() }
-}
-
-// Use an intrinsic to more reliably trigger unreachable-propagation.
-fn unreachable_intrinsic() {
-    unsafe { std::intrinsics::unreachable() }
-}
-
-#[coverage(off)]
-fn main() {
-    if black_box(false) {
-        UNREACHABLE_CLOSURE();
-    }
-    if black_box(false) {
-        unreachable_function();
-    }
-    if black_box(false) {
-        unreachable_intrinsic();
-    }
-}
diff --git a/tests/run-coverage/unused.rs b/tests/run-coverage/unused.rs
deleted file mode 100644
index d985af13547..00000000000
--- a/tests/run-coverage/unused.rs
+++ /dev/null
@@ -1,41 +0,0 @@
-#![allow(dead_code, unused_assignments, unused_must_use, unused_variables)]
-
-fn foo<T>(x: T) {
-    let mut i = 0;
-    while i < 10 {
-        i != 0 || i != 0;
-        i += 1;
-    }
-}
-
-fn unused_template_func<T>(x: T) {
-    let mut i = 0;
-    while i < 10 {
-        i != 0 || i != 0;
-        i += 1;
-    }
-}
-
-fn unused_func(mut a: u32) {
-    if a != 0 {
-        a += 1;
-    }
-}
-
-fn unused_func2(mut a: u32) {
-    if a != 0 {
-        a += 1;
-    }
-}
-
-fn unused_func3(mut a: u32) {
-    if a != 0 {
-        a += 1;
-    }
-}
-
-fn main() -> Result<(), u8> {
-    foo::<u32>(0);
-    foo::<f32>(0.0);
-    Ok(())
-}
diff --git a/tests/run-coverage/while.rs b/tests/run-coverage/while.rs
deleted file mode 100644
index 781b90b3566..00000000000
--- a/tests/run-coverage/while.rs
+++ /dev/null
@@ -1,5 +0,0 @@
-fn main() {
-    let num = 9;
-    while num >= 10 {
-    }
-}
diff --git a/tests/run-coverage/while_early_ret.rs b/tests/run-coverage/while_early_ret.rs
deleted file mode 100644
index b2f0eee2cc0..00000000000
--- a/tests/run-coverage/while_early_ret.rs
+++ /dev/null
@@ -1,42 +0,0 @@
-#![allow(unused_assignments)]
-// failure-status: 1
-
-fn main() -> Result<(), u8> {
-    let mut countdown = 10;
-    while
-        countdown
-            >
-        0
-    {
-        if
-            countdown
-                <
-            5
-        {
-            return
-                if
-                    countdown
-                        >
-                    8
-                {
-                    Ok(())
-                }
-                else
-                {
-                    Err(1)
-                }
-                ;
-        }
-        countdown
-            -=
-        1
-        ;
-    }
-    Ok(())
-}
-
-// ISSUE(77553): Originally, this test had `Err(1)` on line 22 (instead of `Ok(())`) and
-// `std::process::exit(2)` on line 26 (instead of `Err(1)`); and this worked as expected on Linux
-// and MacOS. But on Windows (MSVC, at least), the call to `std::process::exit()` exits the program
-// without saving the InstrProf coverage counters. The use of `std::process:exit()` is not critical
-// to the coverage test for early returns, but this is a limitation that should be fixed.
diff --git a/tests/run-coverage/yield.rs b/tests/run-coverage/yield.rs
deleted file mode 100644
index b7e2ba31b59..00000000000
--- a/tests/run-coverage/yield.rs
+++ /dev/null
@@ -1,37 +0,0 @@
-#![feature(coroutines, coroutine_trait)]
-#![allow(unused_assignments)]
-
-use std::ops::{Coroutine, CoroutineState};
-use std::pin::Pin;
-
-fn main() {
-    let mut coroutine = || {
-        yield 1;
-        return "foo";
-    };
-
-    match Pin::new(&mut coroutine).resume(()) {
-        CoroutineState::Yielded(1) => {}
-        _ => panic!("unexpected value from resume"),
-    }
-    match Pin::new(&mut coroutine).resume(()) {
-        CoroutineState::Complete("foo") => {}
-        _ => panic!("unexpected value from resume"),
-    }
-
-    let mut coroutine = || {
-        yield 1;
-        yield 2;
-        yield 3;
-        return "foo";
-    };
-
-    match Pin::new(&mut coroutine).resume(()) {
-        CoroutineState::Yielded(1) => {}
-        _ => panic!("unexpected value from resume"),
-    }
-    match Pin::new(&mut coroutine).resume(()) {
-        CoroutineState::Yielded(2) => {}
-        _ => panic!("unexpected value from resume"),
-    }
-}
diff --git a/tests/rustdoc/const-effect-param.rs b/tests/rustdoc/const-effect-param.rs
index f50a9b96d81..b6379c05a85 100644
--- a/tests/rustdoc/const-effect-param.rs
+++ b/tests/rustdoc/const-effect-param.rs
@@ -1,3 +1,5 @@
+// Check that we don't render host effect parameters & arguments.
+
 #![crate_name = "foo"]
 #![feature(effects, const_trait_impl)]
 
diff --git a/tests/rustdoc/inline_cross/auxiliary/const-effect-param.rs b/tests/rustdoc/inline_cross/auxiliary/const-effect-param.rs
new file mode 100644
index 00000000000..b0c21ffaeb9
--- /dev/null
+++ b/tests/rustdoc/inline_cross/auxiliary/const-effect-param.rs
@@ -0,0 +1,16 @@
+#![feature(effects, const_trait_impl)]
+
+#[const_trait]
+pub trait Resource {}
+
+pub const fn load<R: ~const Resource>() -> i32 {
+    0
+}
+
+pub const fn lock<R: Resource>() {}
+
+#[allow(non_upper_case_globals)]
+pub trait Clash<const host: u64> {}
+
+#[allow(non_upper_case_globals)]
+pub const fn clash<T: Clash<host>, const host: u64>() {}
diff --git a/tests/rustdoc/inline_cross/auxiliary/const-fn.rs b/tests/rustdoc/inline_cross/auxiliary/const-fn.rs
deleted file mode 100644
index 26332b419b6..00000000000
--- a/tests/rustdoc/inline_cross/auxiliary/const-fn.rs
+++ /dev/null
@@ -1,5 +0,0 @@
-#![feature(effects)]
-
-pub const fn load() -> i32 {
-    0
-}
diff --git a/tests/rustdoc/inline_cross/const-effect-param.rs b/tests/rustdoc/inline_cross/const-effect-param.rs
new file mode 100644
index 00000000000..1d003e28f36
--- /dev/null
+++ b/tests/rustdoc/inline_cross/const-effect-param.rs
@@ -0,0 +1,29 @@
+// Regression test for issue #116629.
+// Check that we don't render host effect parameters & arguments.
+
+// aux-crate:const_effect_param=const-effect-param.rs
+// edition: 2021
+#![crate_name = "user"]
+
+// Don't render the host param on `load` and the host arg `host` passed to `Resource`.
+// @has user/fn.load.html
+// @has - '//pre[@class="rust item-decl"]' "pub const fn load<R>() -> i32\
+//     where \
+//         R: Resource"
+pub use const_effect_param::load;
+
+// Don't render the host arg `true` passed to `Resource`.
+// @has user/fn.lock.html
+// @has - '//pre[@class="rust item-decl"]' "pub const fn lock<R>()\
+//     where \
+//         R: Resource"
+pub use const_effect_param::lock;
+
+// Regression test for an issue introduced in PR #116670.
+// Don't hide the const param `host` since it actually isn't the host effect param.
+// @has user/fn.clash.html
+// @has - '//pre[@class="rust item-decl"]' \
+//    "pub const fn clash<T, const host: u64>()\
+//     where \
+//         T: Clash<host>"
+pub use const_effect_param::clash;
diff --git a/tests/rustdoc/inline_cross/const-fn.rs b/tests/rustdoc/inline_cross/const-fn.rs
deleted file mode 100644
index 24934b873c2..00000000000
--- a/tests/rustdoc/inline_cross/const-fn.rs
+++ /dev/null
@@ -1,10 +0,0 @@
-// Regression test for issue #116629.
-// Check that we render the correct generic params of const fn
-
-// aux-crate:const_fn=const-fn.rs
-// edition: 2021
-#![crate_name = "user"]
-
-// @has user/fn.load.html
-// @has - '//pre[@class="rust item-decl"]' "pub const fn load() -> i32"
-pub use const_fn::load;
diff --git a/tests/rustdoc/issue-115295-macro-const-display.rs b/tests/rustdoc/issue-115295-macro-const-display.rs
new file mode 100644
index 00000000000..2916c7a84a1
--- /dev/null
+++ b/tests/rustdoc/issue-115295-macro-const-display.rs
@@ -0,0 +1,40 @@
+#![crate_name = "foo"]
+
+// @has foo/trait.Trait.html
+pub trait Trait<T> {}
+
+// @has foo/struct.WithConst.html
+pub struct WithConst<const N: usize>;
+
+macro_rules! spans_from_macro {
+    () => {
+        impl WithConst<42> {
+            pub fn new() -> Self {
+                Self
+            }
+        }
+        impl Trait<WithConst<42>> for WithConst<42> {}
+        impl Trait<WithConst<43>> for WithConst<{ 43 }> {}
+        impl Trait<WithConst<{ 44 }>> for WithConst<44> {}
+        pub struct Other {
+            pub field: WithConst<42>,
+        }
+    };
+}
+
+// @has - '//*[@class="impl"]//h3[@class="code-header"]' \
+//     "impl Trait<WithConst<41>> for WithConst<41>"
+impl Trait<WithConst<41>> for WithConst<41> {}
+
+// @has - '//*[@class="impl"]//h3[@class="code-header"]' \
+//     "impl WithConst<42>"
+// @has - '//*[@class="impl"]//h3[@class="code-header"]' \
+//     "impl Trait<WithConst<42>> for WithConst<42>"
+// @has - '//*[@class="impl"]//h3[@class="code-header"]' \
+//     "impl Trait<WithConst<43>> for WithConst<{ 43 }>"
+// @has - '//*[@class="impl"]//h3[@class="code-header"]' \
+//     "impl Trait<WithConst<44>> for WithConst<44>"
+
+// @has foo/struct.Other.html
+// @has - //pre "pub field: WithConst<42>"
+spans_from_macro!();
diff --git a/tests/ui/consts/const-blocks/fn-call-in-non-const.stderr b/tests/ui/consts/const-blocks/fn-call-in-non-const.stderr
index 174103eeba4..eb8b8ac7534 100644
--- a/tests/ui/consts/const-blocks/fn-call-in-non-const.stderr
+++ b/tests/ui/consts/const-blocks/fn-call-in-non-const.stderr
@@ -6,13 +6,17 @@ LL |     let _: [Option<Bar>; 2] = [no_copy(); 2];
    |
    = note: required for `Option<Bar>` to implement `Copy`
    = note: the `Copy` trait is required because this value will be copied for each element of the array
-   = help: consider creating a new `const` item and initializing it with the result of the function call to be used in the repeat position, like `const VAL: Type = const_fn();` and `let x = [VAL; 42];`
    = help: create an inline `const` block, see RFC #2920 <https://github.com/rust-lang/rfcs/pull/2920> for more information
 help: consider annotating `Bar` with `#[derive(Copy)]`
    |
 LL + #[derive(Copy)]
 LL | struct Bar;
    |
+help: consider creating a new `const` item and initializing it with the result of the function call to be used in the repeat position
+   |
+LL ~     const ARRAY_REPEAT_VALUE: Option<Bar> = no_copy();
+LL ~     let _: [Option<Bar>; 2] = [ARRAY_REPEAT_VALUE; 2];
+   |
 
 error: aborting due to previous error
 
diff --git a/tests/ui/consts/const-blocks/trait-error.stderr b/tests/ui/consts/const-blocks/trait-error.stderr
index 06fa4b0b1f3..858ffa820e2 100644
--- a/tests/ui/consts/const-blocks/trait-error.stderr
+++ b/tests/ui/consts/const-blocks/trait-error.stderr
@@ -10,9 +10,13 @@ note: required for `Foo<String>` to implement `Copy`
 LL | #[derive(Copy, Clone)]
    |          ^^^^ unsatisfied trait bound introduced in this `derive` macro
    = note: the `Copy` trait is required because this value will be copied for each element of the array
-   = help: consider creating a new `const` item and initializing it with the result of the function call to be used in the repeat position, like `const VAL: Type = const_fn();` and `let x = [VAL; 42];`
    = help: create an inline `const` block, see RFC #2920 <https://github.com/rust-lang/rfcs/pull/2920> for more information
    = note: this error originates in the derive macro `Copy` (in Nightly builds, run with -Z macro-backtrace for more info)
+help: consider creating a new `const` item and initializing it with the result of the function call to be used in the repeat position
+   |
+LL ~     const ARRAY_REPEAT_VALUE: Foo<String> = Foo(String::new());
+LL ~     [ARRAY_REPEAT_VALUE; 4];
+   |
 
 error: aborting due to previous error
 
diff --git a/tests/ui/consts/const-fn-in-vec.rs b/tests/ui/consts/const-fn-in-vec.rs
index a40290eca09..0483800efef 100644
--- a/tests/ui/consts/const-fn-in-vec.rs
+++ b/tests/ui/consts/const-fn-in-vec.rs
@@ -1,7 +1,11 @@
+static _MAYBE_STRINGS: [Option<String>; 5] = [None; 5];
+//~^ ERROR the trait bound `String: Copy` is not satisfied
+
 fn main() {
     // should hint to create an inline `const` block
     // or to create a new `const` item
-    let strings: [String; 5] = [String::new(); 5];
+    let _strings: [String; 5] = [String::new(); 5];
+    //~^ ERROR the trait bound `String: Copy` is not satisfied
+    let _maybe_strings: [Option<String>; 5] = [None; 5];
     //~^ ERROR the trait bound `String: Copy` is not satisfied
-    println!("{:?}", strings);
 }
diff --git a/tests/ui/consts/const-fn-in-vec.stderr b/tests/ui/consts/const-fn-in-vec.stderr
index 9eb7524b504..4593034bfae 100644
--- a/tests/ui/consts/const-fn-in-vec.stderr
+++ b/tests/ui/consts/const-fn-in-vec.stderr
@@ -1,13 +1,47 @@
 error[E0277]: the trait bound `String: Copy` is not satisfied
-  --> $DIR/const-fn-in-vec.rs:4:33
+  --> $DIR/const-fn-in-vec.rs:1:47
    |
-LL |     let strings: [String; 5] = [String::new(); 5];
-   |                                 ^^^^^^^^^^^^^ the trait `Copy` is not implemented for `String`
+LL | static _MAYBE_STRINGS: [Option<String>; 5] = [None; 5];
+   |                                               ^^^^ the trait `Copy` is not implemented for `String`
    |
+   = note: required for `Option<String>` to implement `Copy`
    = note: the `Copy` trait is required because this value will be copied for each element of the array
-   = help: consider creating a new `const` item and initializing it with the result of the function call to be used in the repeat position, like `const VAL: Type = const_fn();` and `let x = [VAL; 42];`
    = help: create an inline `const` block, see RFC #2920 <https://github.com/rust-lang/rfcs/pull/2920> for more information
+help: consider creating a new `const` item and initializing it with the result of the constructor to be used in the repeat position
+   |
+LL + const ARRAY_REPEAT_VALUE: Option<String> = None;
+LL ~ static _MAYBE_STRINGS: [Option<String>; 5] = [ARRAY_REPEAT_VALUE; 5];
+   |
+
+error[E0277]: the trait bound `String: Copy` is not satisfied
+  --> $DIR/const-fn-in-vec.rs:7:34
+   |
+LL |     let _strings: [String; 5] = [String::new(); 5];
+   |                                  ^^^^^^^^^^^^^ the trait `Copy` is not implemented for `String`
+   |
+   = note: the `Copy` trait is required because this value will be copied for each element of the array
+   = help: create an inline `const` block, see RFC #2920 <https://github.com/rust-lang/rfcs/pull/2920> for more information
+help: consider creating a new `const` item and initializing it with the result of the function call to be used in the repeat position
+   |
+LL ~     const ARRAY_REPEAT_VALUE: String = String::new();
+LL ~     let _strings: [String; 5] = [ARRAY_REPEAT_VALUE; 5];
+   |
+
+error[E0277]: the trait bound `String: Copy` is not satisfied
+  --> $DIR/const-fn-in-vec.rs:9:48
+   |
+LL |     let _maybe_strings: [Option<String>; 5] = [None; 5];
+   |                                                ^^^^ the trait `Copy` is not implemented for `String`
+   |
+   = note: required for `Option<String>` to implement `Copy`
+   = note: the `Copy` trait is required because this value will be copied for each element of the array
+   = help: create an inline `const` block, see RFC #2920 <https://github.com/rust-lang/rfcs/pull/2920> for more information
+help: consider creating a new `const` item and initializing it with the result of the constructor to be used in the repeat position
+   |
+LL ~     const ARRAY_REPEAT_VALUE: Option<String> = None;
+LL ~     let _maybe_strings: [Option<String>; 5] = [ARRAY_REPEAT_VALUE; 5];
+   |
 
-error: aborting due to previous error
+error: aborting due to 3 previous errors
 
 For more information about this error, try `rustc --explain E0277`.
diff --git a/tests/ui/methods/disambiguate-multiple-blanket-impl.stderr b/tests/ui/methods/disambiguate-multiple-blanket-impl.stderr
index a9e9c679fdb..ccdd9a95451 100644
--- a/tests/ui/methods/disambiguate-multiple-blanket-impl.stderr
+++ b/tests/ui/methods/disambiguate-multiple-blanket-impl.stderr
@@ -29,10 +29,10 @@ LL |     fn foo(&self) {}
    |     ^^^^^^^^^^^^^
 help: use fully-qualified syntax to disambiguate
    |
-LL |     <T as A>::foo(&s);
-   |     ~~~~~~~~~~
-LL |     <T as B>::foo(&s);
-   |     ~~~~~~~~~~
+LL |     A::foo(&s);
+   |     ~~~
+LL |     B::foo(&s);
+   |     ~~~
 
 error[E0034]: multiple applicable items in scope
   --> $DIR/disambiguate-multiple-blanket-impl.rs:33:8
@@ -52,9 +52,9 @@ LL |     const CONST: usize = 2;
    |     ^^^^^^^^^^^^^^^^^^
 help: use fully-qualified syntax to disambiguate
    |
-LL |     <T as A>::CONST;
+LL |     <S as A>::CONST;
    |     ~~~~~~~~~~
-LL |     <T as B>::CONST;
+LL |     <S as B>::CONST;
    |     ~~~~~~~~~~
 
 error: aborting due to 3 previous errors
diff --git a/tests/ui/methods/disambiguate-multiple-impl.stderr b/tests/ui/methods/disambiguate-multiple-impl.stderr
index 901bfc30a3f..4172120770c 100644
--- a/tests/ui/methods/disambiguate-multiple-impl.stderr
+++ b/tests/ui/methods/disambiguate-multiple-impl.stderr
@@ -29,10 +29,10 @@ LL |     fn foo(&self) {}
    |     ^^^^^^^^^^^^^
 help: use fully-qualified syntax to disambiguate
    |
-LL |     <S as A>::foo(&s);
-   |     ~~~~~~~~~~
-LL |     <S as B>::foo(&s);
-   |     ~~~~~~~~~~
+LL |     A::foo(&s);
+   |     ~~~
+LL |     B::foo(&s);
+   |     ~~~
 
 error[E0034]: multiple applicable items in scope
   --> $DIR/disambiguate-multiple-impl.rs:34:16
diff --git a/tests/ui/methods/disambiguate-multiple-trait-2.stderr b/tests/ui/methods/disambiguate-multiple-trait-2.stderr
index 0f9c60ce243..2778f254a56 100644
--- a/tests/ui/methods/disambiguate-multiple-trait-2.stderr
+++ b/tests/ui/methods/disambiguate-multiple-trait-2.stderr
@@ -37,12 +37,12 @@ LL |     fn foo(&self);
    |     ^^^^^^^^^^^^^^
 help: disambiguate the method for candidate #1
    |
-LL |     A::foo(t);
-   |     ~~~~~~~~~
+LL |     A::foo(&t);
+   |     ~~~~~~~~~~
 help: disambiguate the method for candidate #2
    |
-LL |     B::foo(t);
-   |     ~~~~~~~~~
+LL |     B::foo(&t);
+   |     ~~~~~~~~~~
 
 error[E0034]: multiple applicable items in scope
   --> $DIR/disambiguate-multiple-trait-2.rs:20:16
@@ -62,10 +62,10 @@ LL |     const CONST: usize;
    |     ^^^^^^^^^^^^^^^^^^
 help: use fully-qualified syntax to disambiguate
    |
-LL |     let _ = A::CONST;
-   |             ~~~
-LL |     let _ = B::CONST;
-   |             ~~~
+LL |     let _ = <T as A>::CONST;
+   |             ~~~~~~~~~~
+LL |     let _ = <T as B>::CONST;
+   |             ~~~~~~~~~~
 
 error[E0223]: ambiguous associated type
   --> $DIR/disambiguate-multiple-trait-2.rs:52:12
@@ -98,10 +98,10 @@ LL |     fn foo(&self) {}
    |     ^^^^^^^^^^^^^
 help: use fully-qualified syntax to disambiguate
    |
-LL |     <T as A>::foo(&s);
-   |     ~~~~~~~~~~
-LL |     <T as B>::foo(&s);
-   |     ~~~~~~~~~~
+LL |     A::foo(&s);
+   |     ~~~
+LL |     B::foo(&s);
+   |     ~~~
 
 error[E0034]: multiple applicable items in scope
   --> $DIR/disambiguate-multiple-trait-2.rs:49:16
@@ -121,9 +121,9 @@ LL |     const CONST: usize = 1;
    |     ^^^^^^^^^^^^^^^^^^
 help: use fully-qualified syntax to disambiguate
    |
-LL |     let _ = <T as A>::CONST;
+LL |     let _ = <S as A>::CONST;
    |             ~~~~~~~~~~
-LL |     let _ = <T as B>::CONST;
+LL |     let _ = <S as B>::CONST;
    |             ~~~~~~~~~~
 
 error: aborting due to 6 previous errors
diff --git a/tests/ui/methods/disambiguate-multiple-trait.stderr b/tests/ui/methods/disambiguate-multiple-trait.stderr
index 9a50d51245b..e00498ca62b 100644
--- a/tests/ui/methods/disambiguate-multiple-trait.stderr
+++ b/tests/ui/methods/disambiguate-multiple-trait.stderr
@@ -29,10 +29,10 @@ LL |     fn foo(&self) {}
    |     ^^^^^^^^^^^^^
 help: use fully-qualified syntax to disambiguate
    |
-LL |     <T as A>::foo(&s);
-   |     ~~~~~~~~~~
-LL |     <T as B>::foo(&s);
-   |     ~~~~~~~~~~
+LL |     A::foo(&s);
+   |     ~~~
+LL |     B::foo(&s);
+   |     ~~~
 
 error[E0034]: multiple applicable items in scope
   --> $DIR/disambiguate-multiple-trait.rs:27:16
@@ -52,9 +52,9 @@ LL |     const CONST: usize = 2;
    |     ^^^^^^^^^^^^^^^^^^
 help: use fully-qualified syntax to disambiguate
    |
-LL |     let _ = <T as A>::CONST;
+LL |     let _ = <S as A>::CONST;
    |             ~~~~~~~~~~
-LL |     let _ = <T as B>::CONST;
+LL |     let _ = <S as B>::CONST;
    |             ~~~~~~~~~~
 
 error: aborting due to 3 previous errors
diff --git a/tests/ui/methods/method-ambig-two-traits-from-bounds.stderr b/tests/ui/methods/method-ambig-two-traits-from-bounds.stderr
index 601e6bbb006..9a84768a9f4 100644
--- a/tests/ui/methods/method-ambig-two-traits-from-bounds.stderr
+++ b/tests/ui/methods/method-ambig-two-traits-from-bounds.stderr
@@ -16,12 +16,12 @@ LL | trait B { fn foo(&self); }
    |           ^^^^^^^^^^^^^^
 help: disambiguate the method for candidate #1
    |
-LL |     A::foo(t);
-   |     ~~~~~~~~~
+LL |     A::foo(&t);
+   |     ~~~~~~~~~~
 help: disambiguate the method for candidate #2
    |
-LL |     B::foo(t);
-   |     ~~~~~~~~~
+LL |     B::foo(&t);
+   |     ~~~~~~~~~~
 
 error: aborting due to previous error
 
diff --git a/tests/ui/methods/method-deref-to-same-trait-object-with-separate-params.stderr b/tests/ui/methods/method-deref-to-same-trait-object-with-separate-params.stderr
index 4e83e4b77f1..755179650bb 100644
--- a/tests/ui/methods/method-deref-to-same-trait-object-with-separate-params.stderr
+++ b/tests/ui/methods/method-deref-to-same-trait-object-with-separate-params.stderr
@@ -54,8 +54,8 @@ LL |     let z = NuisanceFoo::foo(x);
    |             ~~~~~~~~~~~~~~~~~~~
 help: disambiguate the method for candidate #3
    |
-LL |     let z = FinalFoo::foo(x);
-   |             ~~~~~~~~~~~~~~~~
+LL |     let z = FinalFoo::foo(&x);
+   |             ~~~~~~~~~~~~~~~~~
 
 error[E0308]: mismatched types
   --> $DIR/method-deref-to-same-trait-object-with-separate-params.rs:139:24
diff --git a/tests/ui/numbers-arithmetic/saturating-float-casts-wasm.stderr b/tests/ui/numbers-arithmetic/saturating-float-casts-wasm.stderr
new file mode 100644
index 00000000000..475b41388d3
--- /dev/null
+++ b/tests/ui/numbers-arithmetic/saturating-float-casts-wasm.stderr
@@ -0,0 +1,6 @@
+warning: unstable feature specified for `-Ctarget-feature`: `nontrapping-fptoint`
+   |
+   = note: this feature is not stably supported; its behavior can change in the future
+
+warning: 1 warning emitted
+
diff --git a/tests/ui/parser/issues/issue-108109-fn-trait-missing-paren.fixed b/tests/ui/parser/issues/issue-108109-fn-trait-missing-paren.fixed
new file mode 100644
index 00000000000..eaae288864a
--- /dev/null
+++ b/tests/ui/parser/issues/issue-108109-fn-trait-missing-paren.fixed
@@ -0,0 +1,8 @@
+// run-rustfix
+
+pub fn func<F>() where F: FnOnce() -> () {}
+//~^ ERROR expected one of
+//~| NOTE expected one of
+//~| NOTE `Fn` bounds require arguments in parentheses
+
+fn main() {}
diff --git a/tests/ui/parser/issues/issue-108109-fn-trait-missing-paren.rs b/tests/ui/parser/issues/issue-108109-fn-trait-missing-paren.rs
new file mode 100644
index 00000000000..ea5c71150e8
--- /dev/null
+++ b/tests/ui/parser/issues/issue-108109-fn-trait-missing-paren.rs
@@ -0,0 +1,8 @@
+// run-rustfix
+
+pub fn func<F>() where F: FnOnce -> () {}
+//~^ ERROR expected one of
+//~| NOTE expected one of
+//~| NOTE `Fn` bounds require arguments in parentheses
+
+fn main() {}
diff --git a/tests/ui/parser/issues/issue-108109-fn-trait-missing-paren.stderr b/tests/ui/parser/issues/issue-108109-fn-trait-missing-paren.stderr
new file mode 100644
index 00000000000..7cda667570d
--- /dev/null
+++ b/tests/ui/parser/issues/issue-108109-fn-trait-missing-paren.stderr
@@ -0,0 +1,11 @@
+error: expected one of `(`, `+`, `,`, `::`, `<`, or `{`, found `->`
+  --> $DIR/issue-108109-fn-trait-missing-paren.rs:3:34
+   |
+LL | pub fn func<F>() where F: FnOnce -> () {}
+   |                           -------^^ expected one of `(`, `+`, `,`, `::`, `<`, or `{`
+   |                           |     |
+   |                           |     help: try adding parentheses
+   |                           `Fn` bounds require arguments in parentheses
+
+error: aborting due to previous error
+
diff --git a/tests/ui/span/issue-37767.stderr b/tests/ui/span/issue-37767.stderr
index b612fdf16fc..457870821a1 100644
--- a/tests/ui/span/issue-37767.stderr
+++ b/tests/ui/span/issue-37767.stderr
@@ -16,12 +16,12 @@ LL |     fn foo(&mut self) {}
    |     ^^^^^^^^^^^^^^^^^
 help: disambiguate the method for candidate #1
    |
-LL |     A::foo(&a)
-   |     ~~~~~~~~~~
+LL |     A::foo(&mut a)
+   |     ~~~~~~~~~~~~~~
 help: disambiguate the method for candidate #2
    |
-LL |     B::foo(&a)
-   |     ~~~~~~~~~~
+LL |     B::foo(&mut a)
+   |     ~~~~~~~~~~~~~~
 
 error[E0034]: multiple applicable items in scope
   --> $DIR/issue-37767.rs:22:7
diff --git a/tests/ui/target-feature/similar-feature-suggestion.stderr b/tests/ui/target-feature/similar-feature-suggestion.stderr
index 2f376065fdf..f39dfd401e0 100644
--- a/tests/ui/target-feature/similar-feature-suggestion.stderr
+++ b/tests/ui/target-feature/similar-feature-suggestion.stderr
@@ -1,6 +1,6 @@
-warning: unknown feature specified for `-Ctarget-feature`: `rdrnd`
+warning: unknown and unstable feature specified for `-Ctarget-feature`: `rdrnd`
    |
-   = note: it is still passed through to the codegen backend
+   = note: it is still passed through to the codegen backend, but use of this feature might be unsound and the behavior of this feature can change in the future
    = help: you might have meant: `rdrand`
 
 warning: 1 warning emitted
diff --git a/tests/ui/target-feature/unstable-feature.rs b/tests/ui/target-feature/unstable-feature.rs
new file mode 100644
index 00000000000..bd0d72938f4
--- /dev/null
+++ b/tests/ui/target-feature/unstable-feature.rs
@@ -0,0 +1,6 @@
+// compile-flags: -Ctarget-feature=+vaes --crate-type=rlib --target=x86_64-unknown-linux-gnu
+// build-pass
+// needs-llvm-components: x86
+
+#![feature(no_core)]
+#![no_core]
diff --git a/tests/ui/target-feature/unstable-feature.stderr b/tests/ui/target-feature/unstable-feature.stderr
new file mode 100644
index 00000000000..d34544c5c27
--- /dev/null
+++ b/tests/ui/target-feature/unstable-feature.stderr
@@ -0,0 +1,6 @@
+warning: unstable feature specified for `-Ctarget-feature`: `vaes`
+   |
+   = note: this feature is not stably supported; its behavior can change in the future
+
+warning: 1 warning emitted
+
diff --git a/tests/ui/thread-local/thread-local-static.stderr b/tests/ui/thread-local/thread-local-static.mir.stderr
index 712050a25fc..607d7ee902c 100644
--- a/tests/ui/thread-local/thread-local-static.stderr
+++ b/tests/ui/thread-local/thread-local-static.mir.stderr
@@ -1,5 +1,5 @@
 error[E0658]: mutable references are not allowed in constant functions
-  --> $DIR/thread-local-static.rs:7:12
+  --> $DIR/thread-local-static.rs:10:12
    |
 LL | const fn g(x: &mut [u32; 8]) {
    |            ^
@@ -8,13 +8,13 @@ LL | const fn g(x: &mut [u32; 8]) {
    = help: add `#![feature(const_mut_refs)]` to the crate attributes to enable
 
 error[E0625]: thread-local statics cannot be accessed at compile-time
-  --> $DIR/thread-local-static.rs:9:28
+  --> $DIR/thread-local-static.rs:12:28
    |
 LL |     std::mem::swap(x, &mut STATIC_VAR_2)
    |                            ^^^^^^^^^^^^
 
 error[E0013]: constant functions cannot refer to statics
-  --> $DIR/thread-local-static.rs:9:28
+  --> $DIR/thread-local-static.rs:12:28
    |
 LL |     std::mem::swap(x, &mut STATIC_VAR_2)
    |                            ^^^^^^^^^^^^
@@ -22,7 +22,7 @@ LL |     std::mem::swap(x, &mut STATIC_VAR_2)
    = help: consider extracting the value of the `static` to a `const`, and referring to that
 
 error[E0658]: mutable references are not allowed in constant functions
-  --> $DIR/thread-local-static.rs:9:23
+  --> $DIR/thread-local-static.rs:12:23
    |
 LL |     std::mem::swap(x, &mut STATIC_VAR_2)
    |                       ^^^^^^^^^^^^^^^^^
@@ -31,7 +31,7 @@ LL |     std::mem::swap(x, &mut STATIC_VAR_2)
    = help: add `#![feature(const_mut_refs)]` to the crate attributes to enable
 
 error[E0133]: use of mutable static is unsafe and requires unsafe function or block
-  --> $DIR/thread-local-static.rs:9:23
+  --> $DIR/thread-local-static.rs:12:23
    |
 LL |     std::mem::swap(x, &mut STATIC_VAR_2)
    |                       ^^^^^^^^^^^^^^^^^ use of mutable static
diff --git a/tests/ui/thread-local/thread-local-static.rs b/tests/ui/thread-local/thread-local-static.rs
index c7fee9e6b4c..afaffbb7e9b 100644
--- a/tests/ui/thread-local/thread-local-static.rs
+++ b/tests/ui/thread-local/thread-local-static.rs
@@ -1,7 +1,10 @@
 // edition:2018
+// revisions: mir thir
+//thir: -Zthir-unsafeck
 
 #![feature(thread_local)]
 #![feature(const_swap)]
+
 #[thread_local]
 static mut STATIC_VAR_2: [u32; 8] = [4; 8];
 const fn g(x: &mut [u32; 8]) {
diff --git a/tests/ui/thread-local/thread-local-static.thir.stderr b/tests/ui/thread-local/thread-local-static.thir.stderr
new file mode 100644
index 00000000000..607d7ee902c
--- /dev/null
+++ b/tests/ui/thread-local/thread-local-static.thir.stderr
@@ -0,0 +1,44 @@
+error[E0658]: mutable references are not allowed in constant functions
+  --> $DIR/thread-local-static.rs:10:12
+   |
+LL | const fn g(x: &mut [u32; 8]) {
+   |            ^
+   |
+   = note: see issue #57349 <https://github.com/rust-lang/rust/issues/57349> for more information
+   = help: add `#![feature(const_mut_refs)]` to the crate attributes to enable
+
+error[E0625]: thread-local statics cannot be accessed at compile-time
+  --> $DIR/thread-local-static.rs:12:28
+   |
+LL |     std::mem::swap(x, &mut STATIC_VAR_2)
+   |                            ^^^^^^^^^^^^
+
+error[E0013]: constant functions cannot refer to statics
+  --> $DIR/thread-local-static.rs:12:28
+   |
+LL |     std::mem::swap(x, &mut STATIC_VAR_2)
+   |                            ^^^^^^^^^^^^
+   |
+   = help: consider extracting the value of the `static` to a `const`, and referring to that
+
+error[E0658]: mutable references are not allowed in constant functions
+  --> $DIR/thread-local-static.rs:12:23
+   |
+LL |     std::mem::swap(x, &mut STATIC_VAR_2)
+   |                       ^^^^^^^^^^^^^^^^^
+   |
+   = note: see issue #57349 <https://github.com/rust-lang/rust/issues/57349> for more information
+   = help: add `#![feature(const_mut_refs)]` to the crate attributes to enable
+
+error[E0133]: use of mutable static is unsafe and requires unsafe function or block
+  --> $DIR/thread-local-static.rs:12:23
+   |
+LL |     std::mem::swap(x, &mut STATIC_VAR_2)
+   |                       ^^^^^^^^^^^^^^^^^ use of mutable static
+   |
+   = note: mutable statics can be mutated by multiple threads: aliasing violations or data races will cause undefined behavior
+
+error: aborting due to 5 previous errors
+
+Some errors have detailed explanations: E0013, E0133, E0625, E0658.
+For more information about an error, try `rustc --explain E0013`.
diff --git a/tests/ui/union/union-unsafe.mir.stderr b/tests/ui/union/union-unsafe.mir.stderr
index 544213dbc55..15f059ffa48 100644
--- a/tests/ui/union/union-unsafe.mir.stderr
+++ b/tests/ui/union/union-unsafe.mir.stderr
@@ -1,5 +1,5 @@
 error[E0133]: access to union field is unsafe and requires unsafe function or block
-  --> $DIR/union-unsafe.rs:33:5
+  --> $DIR/union-unsafe.rs:34:5
    |
 LL |     *(u.p) = 13;
    |     ^^^^^^^^^^^ access to union field
@@ -7,7 +7,7 @@ LL |     *(u.p) = 13;
    = note: the field may not be properly initialized: using uninitialized data will cause undefined behavior
 
 error[E0133]: access to union field is unsafe and requires unsafe function or block
-  --> $DIR/union-unsafe.rs:46:6
+  --> $DIR/union-unsafe.rs:47:6
    |
 LL |     *u3.a = T::default();
    |      ^^^^ access to union field
@@ -15,7 +15,7 @@ LL |     *u3.a = T::default();
    = note: the field may not be properly initialized: using uninitialized data will cause undefined behavior
 
 error[E0133]: access to union field is unsafe and requires unsafe function or block
-  --> $DIR/union-unsafe.rs:52:6
+  --> $DIR/union-unsafe.rs:53:6
    |
 LL |     *u3.a = T::default();
    |      ^^^^ access to union field
@@ -23,7 +23,7 @@ LL |     *u3.a = T::default();
    = note: the field may not be properly initialized: using uninitialized data will cause undefined behavior
 
 error[E0133]: access to union field is unsafe and requires unsafe function or block
-  --> $DIR/union-unsafe.rs:60:13
+  --> $DIR/union-unsafe.rs:61:13
    |
 LL |     let a = u1.a;
    |             ^^^^ access to union field
@@ -31,7 +31,7 @@ LL |     let a = u1.a;
    = note: the field may not be properly initialized: using uninitialized data will cause undefined behavior
 
 error[E0133]: access to union field is unsafe and requires unsafe function or block
-  --> $DIR/union-unsafe.rs:63:14
+  --> $DIR/union-unsafe.rs:64:14
    |
 LL |     let U1 { a } = u1;
    |              ^ access to union field
@@ -39,7 +39,7 @@ LL |     let U1 { a } = u1;
    = note: the field may not be properly initialized: using uninitialized data will cause undefined behavior
 
 error[E0133]: access to union field is unsafe and requires unsafe function or block
-  --> $DIR/union-unsafe.rs:64:12
+  --> $DIR/union-unsafe.rs:65:12
    |
 LL |     if let U1 { a: 12 } = u1 {}
    |            ^^^^^^^^^^^^ access to union field
@@ -47,7 +47,15 @@ LL |     if let U1 { a: 12 } = u1 {}
    = note: the field may not be properly initialized: using uninitialized data will cause undefined behavior
 
 error[E0133]: access to union field is unsafe and requires unsafe function or block
-  --> $DIR/union-unsafe.rs:69:6
+  --> $DIR/union-unsafe.rs:66:12
+   |
+LL |     if let Some(U1 { a: 13 }) = Some(u1) {}
+   |            ^^^^^^^^^^^^^^^^^^ access to union field
+   |
+   = note: the field may not be properly initialized: using uninitialized data will cause undefined behavior
+
+error[E0133]: access to union field is unsafe and requires unsafe function or block
+  --> $DIR/union-unsafe.rs:71:6
    |
 LL |     *u2.a = String::from("new");
    |      ^^^^ access to union field
@@ -55,7 +63,7 @@ LL |     *u2.a = String::from("new");
    = note: the field may not be properly initialized: using uninitialized data will cause undefined behavior
 
 error[E0133]: access to union field is unsafe and requires unsafe function or block
-  --> $DIR/union-unsafe.rs:73:6
+  --> $DIR/union-unsafe.rs:75:6
    |
 LL |     *u3.a = 1;
    |      ^^^^ access to union field
@@ -63,13 +71,13 @@ LL |     *u3.a = 1;
    = note: the field may not be properly initialized: using uninitialized data will cause undefined behavior
 
 error[E0133]: access to union field is unsafe and requires unsafe function or block
-  --> $DIR/union-unsafe.rs:77:6
+  --> $DIR/union-unsafe.rs:79:6
    |
 LL |     *u3.a = String::from("new");
    |      ^^^^ access to union field
    |
    = note: the field may not be properly initialized: using uninitialized data will cause undefined behavior
 
-error: aborting due to 9 previous errors
+error: aborting due to 10 previous errors
 
 For more information about this error, try `rustc --explain E0133`.
diff --git a/tests/ui/union/union-unsafe.rs b/tests/ui/union/union-unsafe.rs
index 5e1837a901d..d1465486f77 100644
--- a/tests/ui/union/union-unsafe.rs
+++ b/tests/ui/union/union-unsafe.rs
@@ -1,30 +1,31 @@
 // revisions: mir thir
 // [thir]compile-flags: -Z thir-unsafeck
 
-use std::mem::ManuallyDrop;
 use std::cell::RefCell;
+use std::mem::ManuallyDrop;
 
 union U1 {
-    a: u8
+    a: u8,
 }
 
 union U2 {
-    a: ManuallyDrop<String>
+    a: ManuallyDrop<String>,
 }
 
 union U3<T> {
-    a: ManuallyDrop<T>
+    a: ManuallyDrop<T>,
 }
 
 union U4<T: Copy> {
-    a: T
+    a: T,
 }
 
 union URef {
     p: &'static mut i32,
 }
 
-union URefCell { // field that does not drop but is not `Copy`, either
+union URefCell {
+    // field that does not drop but is not `Copy`, either
     a: (ManuallyDrop<RefCell<i32>>, i32),
 }
 
@@ -62,6 +63,7 @@ fn main() {
 
     let U1 { a } = u1; //~ ERROR access to union field is unsafe
     if let U1 { a: 12 } = u1 {} //~ ERROR access to union field is unsafe
+    if let Some(U1 { a: 13 }) = Some(u1) {} //~ ERROR access to union field is unsafe
     // let U1 { .. } = u1; // OK
 
     let mut u2 = U2 { a: ManuallyDrop::new(String::from("old")) }; // OK
diff --git a/tests/ui/union/union-unsafe.thir.stderr b/tests/ui/union/union-unsafe.thir.stderr
index f959fe5bdb5..9ce835497c5 100644
--- a/tests/ui/union/union-unsafe.thir.stderr
+++ b/tests/ui/union/union-unsafe.thir.stderr
@@ -1,5 +1,5 @@
 error[E0133]: access to union field is unsafe and requires unsafe function or block
-  --> $DIR/union-unsafe.rs:33:6
+  --> $DIR/union-unsafe.rs:34:6
    |
 LL |     *(u.p) = 13;
    |      ^^^^^ access to union field
@@ -7,7 +7,7 @@ LL |     *(u.p) = 13;
    = note: the field may not be properly initialized: using uninitialized data will cause undefined behavior
 
 error[E0133]: access to union field is unsafe and requires unsafe function or block
-  --> $DIR/union-unsafe.rs:46:6
+  --> $DIR/union-unsafe.rs:47:6
    |
 LL |     *u3.a = T::default();
    |      ^^^^ access to union field
@@ -15,7 +15,7 @@ LL |     *u3.a = T::default();
    = note: the field may not be properly initialized: using uninitialized data will cause undefined behavior
 
 error[E0133]: access to union field is unsafe and requires unsafe function or block
-  --> $DIR/union-unsafe.rs:52:6
+  --> $DIR/union-unsafe.rs:53:6
    |
 LL |     *u3.a = T::default();
    |      ^^^^ access to union field
@@ -23,7 +23,7 @@ LL |     *u3.a = T::default();
    = note: the field may not be properly initialized: using uninitialized data will cause undefined behavior
 
 error[E0133]: access to union field is unsafe and requires unsafe function or block
-  --> $DIR/union-unsafe.rs:60:13
+  --> $DIR/union-unsafe.rs:61:13
    |
 LL |     let a = u1.a;
    |             ^^^^ access to union field
@@ -31,7 +31,7 @@ LL |     let a = u1.a;
    = note: the field may not be properly initialized: using uninitialized data will cause undefined behavior
 
 error[E0133]: access to union field is unsafe and requires unsafe function or block
-  --> $DIR/union-unsafe.rs:63:14
+  --> $DIR/union-unsafe.rs:64:14
    |
 LL |     let U1 { a } = u1;
    |              ^ access to union field
@@ -39,15 +39,23 @@ LL |     let U1 { a } = u1;
    = note: the field may not be properly initialized: using uninitialized data will cause undefined behavior
 
 error[E0133]: access to union field is unsafe and requires unsafe function or block
-  --> $DIR/union-unsafe.rs:64:8
+  --> $DIR/union-unsafe.rs:65:20
    |
 LL |     if let U1 { a: 12 } = u1 {}
-   |        ^^^^^^^^^^^^^^^^^^^^^ access to union field
+   |                    ^^ access to union field
    |
    = note: the field may not be properly initialized: using uninitialized data will cause undefined behavior
 
 error[E0133]: access to union field is unsafe and requires unsafe function or block
-  --> $DIR/union-unsafe.rs:69:6
+  --> $DIR/union-unsafe.rs:66:25
+   |
+LL |     if let Some(U1 { a: 13 }) = Some(u1) {}
+   |                         ^^ access to union field
+   |
+   = note: the field may not be properly initialized: using uninitialized data will cause undefined behavior
+
+error[E0133]: access to union field is unsafe and requires unsafe function or block
+  --> $DIR/union-unsafe.rs:71:6
    |
 LL |     *u2.a = String::from("new");
    |      ^^^^ access to union field
@@ -55,7 +63,7 @@ LL |     *u2.a = String::from("new");
    = note: the field may not be properly initialized: using uninitialized data will cause undefined behavior
 
 error[E0133]: access to union field is unsafe and requires unsafe function or block
-  --> $DIR/union-unsafe.rs:73:6
+  --> $DIR/union-unsafe.rs:75:6
    |
 LL |     *u3.a = 1;
    |      ^^^^ access to union field
@@ -63,13 +71,13 @@ LL |     *u3.a = 1;
    = note: the field may not be properly initialized: using uninitialized data will cause undefined behavior
 
 error[E0133]: access to union field is unsafe and requires unsafe function or block
-  --> $DIR/union-unsafe.rs:77:6
+  --> $DIR/union-unsafe.rs:79:6
    |
 LL |     *u3.a = String::from("new");
    |      ^^^^ access to union field
    |
    = note: the field may not be properly initialized: using uninitialized data will cause undefined behavior
 
-error: aborting due to 9 previous errors
+error: aborting due to 10 previous errors
 
 For more information about this error, try `rustc --explain E0133`.
diff --git a/tests/ui/unsafe/edition-2024-unsafe_op_in_unsafe_fn.stderr b/tests/ui/unsafe/edition-2024-unsafe_op_in_unsafe_fn.mir.stderr
index fbc621f4d0e..ea53bf59d31 100644
--- a/tests/ui/unsafe/edition-2024-unsafe_op_in_unsafe_fn.stderr
+++ b/tests/ui/unsafe/edition-2024-unsafe_op_in_unsafe_fn.mir.stderr
@@ -1,12 +1,12 @@
 warning: call to unsafe function is unsafe and requires unsafe block (error E0133)
-  --> $DIR/edition-2024-unsafe_op_in_unsafe_fn.rs:12:5
+  --> $DIR/edition-2024-unsafe_op_in_unsafe_fn.rs:13:5
    |
 LL |     unsf();
    |     ^^^^^^ call to unsafe function
    |
    = note: consult the function's documentation for information on how to avoid undefined behavior
 note: an unsafe function restricts its caller, but its body is safe by default
-  --> $DIR/edition-2024-unsafe_op_in_unsafe_fn.rs:11:1
+  --> $DIR/edition-2024-unsafe_op_in_unsafe_fn.rs:12:1
    |
 LL | unsafe fn foo() {
    | ^^^^^^^^^^^^^^^
diff --git a/tests/ui/unsafe/edition-2024-unsafe_op_in_unsafe_fn.rs b/tests/ui/unsafe/edition-2024-unsafe_op_in_unsafe_fn.rs
index a192f3445f7..1b429955cb0 100644
--- a/tests/ui/unsafe/edition-2024-unsafe_op_in_unsafe_fn.rs
+++ b/tests/ui/unsafe/edition-2024-unsafe_op_in_unsafe_fn.rs
@@ -1,17 +1,21 @@
 // edition: 2024
 // compile-flags: -Zunstable-options
 // check-pass
+// revisions: mir thir
+// [thir]compile-flags: -Zthir-unsafeck
 
 #![crate_type = "lib"]
-
 #![deny(unused_unsafe)]
 
 unsafe fn unsf() {}
 
 unsafe fn foo() {
     unsf();
-    //~^ WARN call to unsafe function is unsafe and requires unsafe block
+    //[mir]~^ WARN call to unsafe function is unsafe and requires unsafe block
+    //[thir]~^^ WARN call to unsafe function `unsf` is unsafe and requires unsafe block
 
     // no unused_unsafe
-    unsafe { unsf(); }
+    unsafe {
+        unsf();
+    }
 }
diff --git a/tests/ui/unsafe/edition-2024-unsafe_op_in_unsafe_fn.thir.stderr b/tests/ui/unsafe/edition-2024-unsafe_op_in_unsafe_fn.thir.stderr
new file mode 100644
index 00000000000..d63843ed2b3
--- /dev/null
+++ b/tests/ui/unsafe/edition-2024-unsafe_op_in_unsafe_fn.thir.stderr
@@ -0,0 +1,16 @@
+warning: call to unsafe function `unsf` is unsafe and requires unsafe block (error E0133)
+  --> $DIR/edition-2024-unsafe_op_in_unsafe_fn.rs:13:5
+   |
+LL |     unsf();
+   |     ^^^^^^ call to unsafe function
+   |
+   = note: consult the function's documentation for information on how to avoid undefined behavior
+note: an unsafe function restricts its caller, but its body is safe by default
+  --> $DIR/edition-2024-unsafe_op_in_unsafe_fn.rs:12:1
+   |
+LL | unsafe fn foo() {
+   | ^^^^^^^^^^^^^^^
+   = note: `#[warn(unsafe_op_in_unsafe_fn)]` on by default
+
+warning: 1 warning emitted
+
diff --git a/tests/ui/unsafe/ranged_ints2.mirunsafeck.stderr b/tests/ui/unsafe/ranged_ints2.mirunsafeck.stderr
index 427843f8d45..dc6bd72f56c 100644
--- a/tests/ui/unsafe/ranged_ints2.mirunsafeck.stderr
+++ b/tests/ui/unsafe/ranged_ints2.mirunsafeck.stderr
@@ -6,6 +6,14 @@ LL |     let y = &mut x.0;
    |
    = note: mutating layout constrained fields cannot statically be checked for valid values
 
-error: aborting due to previous error
+error[E0133]: mutation of layout constrained field is unsafe and requires unsafe function or block
+  --> $DIR/ranged_ints2.rs:12:25
+   |
+LL |     if let Some(NonZero(ref mut y)) = Some(x) {}
+   |                         ^^^^^^^^^ mutation of layout constrained field
+   |
+   = note: mutating layout constrained fields cannot statically be checked for valid values
+
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0133`.
diff --git a/tests/ui/unsafe/ranged_ints2.rs b/tests/ui/unsafe/ranged_ints2.rs
index 9a6bb18f926..ad9d598aba2 100644
--- a/tests/ui/unsafe/ranged_ints2.rs
+++ b/tests/ui/unsafe/ranged_ints2.rs
@@ -9,4 +9,5 @@ pub(crate) struct NonZero<T>(pub(crate) T);
 fn main() {
     let mut x = unsafe { NonZero(1) };
     let y = &mut x.0; //~ ERROR mutation of layout constrained field is unsafe
+    if let Some(NonZero(ref mut y)) = Some(x) {} //~ ERROR mutation of layout constrained field is unsafe
 }
diff --git a/tests/ui/unsafe/ranged_ints2.thirunsafeck.stderr b/tests/ui/unsafe/ranged_ints2.thirunsafeck.stderr
index 427843f8d45..dc6bd72f56c 100644
--- a/tests/ui/unsafe/ranged_ints2.thirunsafeck.stderr
+++ b/tests/ui/unsafe/ranged_ints2.thirunsafeck.stderr
@@ -6,6 +6,14 @@ LL |     let y = &mut x.0;
    |
    = note: mutating layout constrained fields cannot statically be checked for valid values
 
-error: aborting due to previous error
+error[E0133]: mutation of layout constrained field is unsafe and requires unsafe function or block
+  --> $DIR/ranged_ints2.rs:12:25
+   |
+LL |     if let Some(NonZero(ref mut y)) = Some(x) {}
+   |                         ^^^^^^^^^ mutation of layout constrained field
+   |
+   = note: mutating layout constrained fields cannot statically be checked for valid values
+
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0133`.
diff --git a/tests/ui/unsafe/rfc-2585-unsafe_op_in_unsafe_fn.thir.stderr b/tests/ui/unsafe/rfc-2585-unsafe_op_in_unsafe_fn.thir.stderr
index 4cdd97e5e06..ad0621a1d04 100644
--- a/tests/ui/unsafe/rfc-2585-unsafe_op_in_unsafe_fn.thir.stderr
+++ b/tests/ui/unsafe/rfc-2585-unsafe_op_in_unsafe_fn.thir.stderr
@@ -5,6 +5,11 @@ LL |     unsf();
    |     ^^^^^^ call to unsafe function
    |
    = note: consult the function's documentation for information on how to avoid undefined behavior
+note: an unsafe function restricts its caller, but its body is safe by default
+  --> $DIR/rfc-2585-unsafe_op_in_unsafe_fn.rs:11:1
+   |
+LL | unsafe fn deny_level() {
+   | ^^^^^^^^^^^^^^^^^^^^^^
 note: the lint level is defined here
   --> $DIR/rfc-2585-unsafe_op_in_unsafe_fn.rs:4:9
    |
@@ -46,6 +51,11 @@ LL |     unsf();
    |     ^^^^^^ call to unsafe function
    |
    = note: consult the function's documentation for information on how to avoid undefined behavior
+note: an unsafe function restricts its caller, but its body is safe by default
+  --> $DIR/rfc-2585-unsafe_op_in_unsafe_fn.rs:27:1
+   |
+LL | unsafe fn warning_level() {
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^
 note: the lint level is defined here
   --> $DIR/rfc-2585-unsafe_op_in_unsafe_fn.rs:26:8
    |
diff --git a/tests/ui/unsafe/wrapping-unsafe-block-sugg.fixed b/tests/ui/unsafe/wrapping-unsafe-block-sugg.mir.fixed
index db1c102210e..b59029df642 100644
--- a/tests/ui/unsafe/wrapping-unsafe-block-sugg.fixed
+++ b/tests/ui/unsafe/wrapping-unsafe-block-sugg.mir.fixed
@@ -1,7 +1,10 @@
 // run-rustfix
 // aux-build:external_unsafe_macro.rs
+// revisions: mir thir
+// [thir]compile-flags: -Zthir-unsafeck
 
 #![deny(unsafe_op_in_unsafe_fn)] //~ NOTE
+#![crate_name = "wrapping_unsafe_block_sugg"]
 
 extern crate external_unsafe_macro;
 
@@ -9,11 +12,13 @@ unsafe fn unsf() {}
 
 pub unsafe fn foo() { unsafe {
     //~^ NOTE an unsafe function restricts its caller, but its body is safe by default
-    unsf(); //~ ERROR call to unsafe function is unsafe
-    //~^ NOTE
+    unsf(); //[mir]~ ERROR call to unsafe function is unsafe
+     //[thir]~^ ERROR call to unsafe function `unsf` is unsafe
+    //~^^ NOTE
     //~| NOTE
-    unsf(); //~ ERROR call to unsafe function is unsafe
-    //~^ NOTE
+    unsf(); //[mir]~ ERROR call to unsafe function is unsafe
+    //[thir]~^ ERROR call to unsafe function `unsf` is unsafe
+    //~^^ NOTE
     //~| NOTE
 }}
 
@@ -39,10 +44,12 @@ pub unsafe fn baz() -> i32 { unsafe {
 }}
 
 macro_rules! unsafe_macro { () => (unsf()) }
-//~^ ERROR call to unsafe function is unsafe
+//[mir]~^ ERROR call to unsafe function is unsafe
+//[thir]~^^ ERROR call to unsafe function `unsf` is unsafe
 //~| NOTE
 //~| NOTE
-//~| ERROR call to unsafe function is unsafe
+//[mir]~| ERROR call to unsafe function is unsafe
+//[thir]~| ERROR call to unsafe function `unsf` is unsafe
 //~| NOTE
 //~| NOTE
 
diff --git a/tests/ui/unsafe/wrapping-unsafe-block-sugg.stderr b/tests/ui/unsafe/wrapping-unsafe-block-sugg.mir.stderr
index 43f619c27d2..7a1b83c7367 100644
--- a/tests/ui/unsafe/wrapping-unsafe-block-sugg.stderr
+++ b/tests/ui/unsafe/wrapping-unsafe-block-sugg.mir.stderr
@@ -1,23 +1,23 @@
 error: call to unsafe function is unsafe and requires unsafe block (error E0133)
-  --> $DIR/wrapping-unsafe-block-sugg.rs:12:5
+  --> $DIR/wrapping-unsafe-block-sugg.rs:15:5
    |
 LL |     unsf();
    |     ^^^^^^ call to unsafe function
    |
    = note: consult the function's documentation for information on how to avoid undefined behavior
 note: an unsafe function restricts its caller, but its body is safe by default
-  --> $DIR/wrapping-unsafe-block-sugg.rs:10:1
+  --> $DIR/wrapping-unsafe-block-sugg.rs:13:1
    |
 LL | pub unsafe fn foo() {
    | ^^^^^^^^^^^^^^^^^^^
 note: the lint level is defined here
-  --> $DIR/wrapping-unsafe-block-sugg.rs:4:9
+  --> $DIR/wrapping-unsafe-block-sugg.rs:6:9
    |
 LL | #![deny(unsafe_op_in_unsafe_fn)]
    |         ^^^^^^^^^^^^^^^^^^^^^^
 
 error: call to unsafe function is unsafe and requires unsafe block (error E0133)
-  --> $DIR/wrapping-unsafe-block-sugg.rs:15:5
+  --> $DIR/wrapping-unsafe-block-sugg.rs:19:5
    |
 LL |     unsf();
    |     ^^^^^^ call to unsafe function
@@ -25,20 +25,20 @@ LL |     unsf();
    = note: consult the function's documentation for information on how to avoid undefined behavior
 
 error: dereference of raw pointer is unsafe and requires unsafe block (error E0133)
-  --> $DIR/wrapping-unsafe-block-sugg.rs:22:13
+  --> $DIR/wrapping-unsafe-block-sugg.rs:27:13
    |
 LL |     let y = *x;
    |             ^^ dereference of raw pointer
    |
    = note: raw pointers may be null, dangling or unaligned; they can violate aliasing rules and cause data races: all of these are undefined behavior
 note: an unsafe function restricts its caller, but its body is safe by default
-  --> $DIR/wrapping-unsafe-block-sugg.rs:20:1
+  --> $DIR/wrapping-unsafe-block-sugg.rs:25:1
    |
 LL | pub unsafe fn bar(x: *const i32) -> i32 {
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error: dereference of raw pointer is unsafe and requires unsafe block (error E0133)
-  --> $DIR/wrapping-unsafe-block-sugg.rs:25:9
+  --> $DIR/wrapping-unsafe-block-sugg.rs:30:9
    |
 LL |     y + *x
    |         ^^ dereference of raw pointer
@@ -46,20 +46,20 @@ LL |     y + *x
    = note: raw pointers may be null, dangling or unaligned; they can violate aliasing rules and cause data races: all of these are undefined behavior
 
 error: use of mutable static is unsafe and requires unsafe block (error E0133)
-  --> $DIR/wrapping-unsafe-block-sugg.rs:33:13
+  --> $DIR/wrapping-unsafe-block-sugg.rs:38:13
    |
 LL |     let y = BAZ;
    |             ^^^ use of mutable static
    |
    = note: mutable statics can be mutated by multiple threads: aliasing violations or data races will cause undefined behavior
 note: an unsafe function restricts its caller, but its body is safe by default
-  --> $DIR/wrapping-unsafe-block-sugg.rs:31:1
+  --> $DIR/wrapping-unsafe-block-sugg.rs:36:1
    |
 LL | pub unsafe fn baz() -> i32 {
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error: use of mutable static is unsafe and requires unsafe block (error E0133)
-  --> $DIR/wrapping-unsafe-block-sugg.rs:36:9
+  --> $DIR/wrapping-unsafe-block-sugg.rs:41:9
    |
 LL |     y + BAZ
    |         ^^^ use of mutable static
@@ -67,7 +67,7 @@ LL |     y + BAZ
    = note: mutable statics can be mutated by multiple threads: aliasing violations or data races will cause undefined behavior
 
 error: call to unsafe function is unsafe and requires unsafe block (error E0133)
-  --> $DIR/wrapping-unsafe-block-sugg.rs:41:36
+  --> $DIR/wrapping-unsafe-block-sugg.rs:46:36
    |
 LL | macro_rules! unsafe_macro { () => (unsf()) }
    |                                    ^^^^^^ call to unsafe function
@@ -77,14 +77,14 @@ LL |     unsafe_macro!();
    |
    = note: consult the function's documentation for information on how to avoid undefined behavior
 note: an unsafe function restricts its caller, but its body is safe by default
-  --> $DIR/wrapping-unsafe-block-sugg.rs:49:1
+  --> $DIR/wrapping-unsafe-block-sugg.rs:56:1
    |
 LL | pub unsafe fn unsafe_in_macro() {
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    = note: this error originates in the macro `unsafe_macro` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: call to unsafe function is unsafe and requires unsafe block (error E0133)
-  --> $DIR/wrapping-unsafe-block-sugg.rs:41:36
+  --> $DIR/wrapping-unsafe-block-sugg.rs:46:36
    |
 LL | macro_rules! unsafe_macro { () => (unsf()) }
    |                                    ^^^^^^ call to unsafe function
diff --git a/tests/ui/unsafe/wrapping-unsafe-block-sugg.rs b/tests/ui/unsafe/wrapping-unsafe-block-sugg.rs
index 9c6be45896e..3629b8a1beb 100644
--- a/tests/ui/unsafe/wrapping-unsafe-block-sugg.rs
+++ b/tests/ui/unsafe/wrapping-unsafe-block-sugg.rs
@@ -1,7 +1,10 @@
 // run-rustfix
 // aux-build:external_unsafe_macro.rs
+// revisions: mir thir
+// [thir]compile-flags: -Zthir-unsafeck
 
 #![deny(unsafe_op_in_unsafe_fn)] //~ NOTE
+#![crate_name = "wrapping_unsafe_block_sugg"]
 
 extern crate external_unsafe_macro;
 
@@ -9,11 +12,13 @@ unsafe fn unsf() {}
 
 pub unsafe fn foo() {
     //~^ NOTE an unsafe function restricts its caller, but its body is safe by default
-    unsf(); //~ ERROR call to unsafe function is unsafe
-    //~^ NOTE
+    unsf(); //[mir]~ ERROR call to unsafe function is unsafe
+     //[thir]~^ ERROR call to unsafe function `unsf` is unsafe
+    //~^^ NOTE
     //~| NOTE
-    unsf(); //~ ERROR call to unsafe function is unsafe
-    //~^ NOTE
+    unsf(); //[mir]~ ERROR call to unsafe function is unsafe
+    //[thir]~^ ERROR call to unsafe function `unsf` is unsafe
+    //~^^ NOTE
     //~| NOTE
 }
 
@@ -39,10 +44,12 @@ pub unsafe fn baz() -> i32 {
 }
 
 macro_rules! unsafe_macro { () => (unsf()) }
-//~^ ERROR call to unsafe function is unsafe
+//[mir]~^ ERROR call to unsafe function is unsafe
+//[thir]~^^ ERROR call to unsafe function `unsf` is unsafe
 //~| NOTE
 //~| NOTE
-//~| ERROR call to unsafe function is unsafe
+//[mir]~| ERROR call to unsafe function is unsafe
+//[thir]~| ERROR call to unsafe function `unsf` is unsafe
 //~| NOTE
 //~| NOTE
 
diff --git a/tests/ui/unsafe/wrapping-unsafe-block-sugg.thir.fixed b/tests/ui/unsafe/wrapping-unsafe-block-sugg.thir.fixed
new file mode 100644
index 00000000000..b59029df642
--- /dev/null
+++ b/tests/ui/unsafe/wrapping-unsafe-block-sugg.thir.fixed
@@ -0,0 +1,73 @@
+// run-rustfix
+// aux-build:external_unsafe_macro.rs
+// revisions: mir thir
+// [thir]compile-flags: -Zthir-unsafeck
+
+#![deny(unsafe_op_in_unsafe_fn)] //~ NOTE
+#![crate_name = "wrapping_unsafe_block_sugg"]
+
+extern crate external_unsafe_macro;
+
+unsafe fn unsf() {}
+
+pub unsafe fn foo() { unsafe {
+    //~^ NOTE an unsafe function restricts its caller, but its body is safe by default
+    unsf(); //[mir]~ ERROR call to unsafe function is unsafe
+     //[thir]~^ ERROR call to unsafe function `unsf` is unsafe
+    //~^^ NOTE
+    //~| NOTE
+    unsf(); //[mir]~ ERROR call to unsafe function is unsafe
+    //[thir]~^ ERROR call to unsafe function `unsf` is unsafe
+    //~^^ NOTE
+    //~| NOTE
+}}
+
+pub unsafe fn bar(x: *const i32) -> i32 { unsafe {
+    //~^ NOTE an unsafe function restricts its caller, but its body is safe by default
+    let y = *x; //~ ERROR dereference of raw pointer is unsafe and requires unsafe block
+    //~^ NOTE
+    //~| NOTE
+    y + *x //~ ERROR dereference of raw pointer is unsafe and requires unsafe block
+    //~^ NOTE
+    //~| NOTE
+}}
+
+static mut BAZ: i32 = 0;
+pub unsafe fn baz() -> i32 { unsafe {
+    //~^ NOTE an unsafe function restricts its caller, but its body is safe by default
+    let y = BAZ; //~ ERROR use of mutable static is unsafe and requires unsafe block
+    //~^ NOTE
+    //~| NOTE
+    y + BAZ //~ ERROR use of mutable static is unsafe and requires unsafe block
+    //~^ NOTE
+    //~| NOTE
+}}
+
+macro_rules! unsafe_macro { () => (unsf()) }
+//[mir]~^ ERROR call to unsafe function is unsafe
+//[thir]~^^ ERROR call to unsafe function `unsf` is unsafe
+//~| NOTE
+//~| NOTE
+//[mir]~| ERROR call to unsafe function is unsafe
+//[thir]~| ERROR call to unsafe function `unsf` is unsafe
+//~| NOTE
+//~| NOTE
+
+pub unsafe fn unsafe_in_macro() { unsafe {
+    //~^ NOTE an unsafe function restricts its caller, but its body is safe by default
+    unsafe_macro!();
+    //~^ NOTE
+    //~| NOTE
+    unsafe_macro!();
+    //~^ NOTE
+    //~| NOTE
+}}
+
+pub unsafe fn unsafe_in_external_macro() {
+    // FIXME: https://github.com/rust-lang/rust/issues/112504
+    // FIXME: ~^ NOTE an unsafe function restricts its caller, but its body is safe by default
+    external_unsafe_macro::unsafe_macro!();
+    external_unsafe_macro::unsafe_macro!();
+}
+
+fn main() {}
diff --git a/tests/ui/unsafe/wrapping-unsafe-block-sugg.thir.stderr b/tests/ui/unsafe/wrapping-unsafe-block-sugg.thir.stderr
new file mode 100644
index 00000000000..b1fb35f85a6
--- /dev/null
+++ b/tests/ui/unsafe/wrapping-unsafe-block-sugg.thir.stderr
@@ -0,0 +1,99 @@
+error: call to unsafe function `unsf` is unsafe and requires unsafe block (error E0133)
+  --> $DIR/wrapping-unsafe-block-sugg.rs:15:5
+   |
+LL |     unsf();
+   |     ^^^^^^ call to unsafe function
+   |
+   = note: consult the function's documentation for information on how to avoid undefined behavior
+note: an unsafe function restricts its caller, but its body is safe by default
+  --> $DIR/wrapping-unsafe-block-sugg.rs:13:1
+   |
+LL | pub unsafe fn foo() {
+   | ^^^^^^^^^^^^^^^^^^^
+note: the lint level is defined here
+  --> $DIR/wrapping-unsafe-block-sugg.rs:6:9
+   |
+LL | #![deny(unsafe_op_in_unsafe_fn)]
+   |         ^^^^^^^^^^^^^^^^^^^^^^
+
+error: call to unsafe function `unsf` is unsafe and requires unsafe block (error E0133)
+  --> $DIR/wrapping-unsafe-block-sugg.rs:19:5
+   |
+LL |     unsf();
+   |     ^^^^^^ call to unsafe function
+   |
+   = note: consult the function's documentation for information on how to avoid undefined behavior
+
+error: dereference of raw pointer is unsafe and requires unsafe block (error E0133)
+  --> $DIR/wrapping-unsafe-block-sugg.rs:27:13
+   |
+LL |     let y = *x;
+   |             ^^ dereference of raw pointer
+   |
+   = note: raw pointers may be null, dangling or unaligned; they can violate aliasing rules and cause data races: all of these are undefined behavior
+note: an unsafe function restricts its caller, but its body is safe by default
+  --> $DIR/wrapping-unsafe-block-sugg.rs:25:1
+   |
+LL | pub unsafe fn bar(x: *const i32) -> i32 {
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+error: dereference of raw pointer is unsafe and requires unsafe block (error E0133)
+  --> $DIR/wrapping-unsafe-block-sugg.rs:30:9
+   |
+LL |     y + *x
+   |         ^^ dereference of raw pointer
+   |
+   = note: raw pointers may be null, dangling or unaligned; they can violate aliasing rules and cause data races: all of these are undefined behavior
+
+error: use of mutable static is unsafe and requires unsafe block (error E0133)
+  --> $DIR/wrapping-unsafe-block-sugg.rs:38:13
+   |
+LL |     let y = BAZ;
+   |             ^^^ use of mutable static
+   |
+   = note: mutable statics can be mutated by multiple threads: aliasing violations or data races will cause undefined behavior
+note: an unsafe function restricts its caller, but its body is safe by default
+  --> $DIR/wrapping-unsafe-block-sugg.rs:36:1
+   |
+LL | pub unsafe fn baz() -> i32 {
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+error: use of mutable static is unsafe and requires unsafe block (error E0133)
+  --> $DIR/wrapping-unsafe-block-sugg.rs:41:9
+   |
+LL |     y + BAZ
+   |         ^^^ use of mutable static
+   |
+   = note: mutable statics can be mutated by multiple threads: aliasing violations or data races will cause undefined behavior
+
+error: call to unsafe function `unsf` is unsafe and requires unsafe block (error E0133)
+  --> $DIR/wrapping-unsafe-block-sugg.rs:46:36
+   |
+LL | macro_rules! unsafe_macro { () => (unsf()) }
+   |                                    ^^^^^^ call to unsafe function
+...
+LL |     unsafe_macro!();
+   |     --------------- in this macro invocation
+   |
+   = note: consult the function's documentation for information on how to avoid undefined behavior
+note: an unsafe function restricts its caller, but its body is safe by default
+  --> $DIR/wrapping-unsafe-block-sugg.rs:56:1
+   |
+LL | pub unsafe fn unsafe_in_macro() {
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   = note: this error originates in the macro `unsafe_macro` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error: call to unsafe function `unsf` is unsafe and requires unsafe block (error E0133)
+  --> $DIR/wrapping-unsafe-block-sugg.rs:46:36
+   |
+LL | macro_rules! unsafe_macro { () => (unsf()) }
+   |                                    ^^^^^^ call to unsafe function
+...
+LL |     unsafe_macro!();
+   |     --------------- in this macro invocation
+   |
+   = note: consult the function's documentation for information on how to avoid undefined behavior
+   = note: this error originates in the macro `unsafe_macro` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error: aborting due to 8 previous errors
+