Auto merge of #2679 - RalfJung:clock_gettime, r=RalfJung

implement clock_gettime on macos

and pull in rustc changes so we can test this against #103594.

Fixes rust-lang/miri#2664

Author: bors

compiler/rustc_ast_lowering/src/asm.rs

@@ -11,7 +11,7 @@ use super::LoweringContext;
 
 use rustc_ast::ptr::P;
 use rustc_ast::*;
-use rustc_data_structures::fx::{FxHashMap, FxHashSet};
+use rustc_data_structures::fx::{FxHashMap, FxHashSet, FxIndexMap};
 use rustc_hir as hir;
 use rustc_hir::def::{DefKind, Res};
 use rustc_hir::definitions::DefPathData;
@@ -71,7 +71,7 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
             .emit();
         }
 
-        let mut clobber_abis = FxHashMap::default();
+        let mut clobber_abis = FxIndexMap::default();
         if let Some(asm_arch) = asm_arch {
             for (abi_name, abi_span) in &asm.clobber_abis {
                 match asm::InlineAsmClobberAbi::parse(asm_arch, &self.tcx.sess.target, *abi_name) {

compiler/rustc_ast_lowering/src/expr.rs

@@ -655,15 +655,40 @@ impl<'hir> LoweringContext<'_, 'hir> {
 
             hir::ExprKind::Closure(c)
         };
-        let generator = hir::Expr {
-            hir_id: self.lower_node_id(closure_node_id),
-            kind: generator_kind,
-            span: self.lower_span(span),
+        let parent_has_track_caller = self
+            .attrs
+            .values()
+            .find(|attrs| attrs.into_iter().find(|attr| attr.has_name(sym::track_caller)).is_some())
+            .is_some();
+        let unstable_span =
+            self.mark_span_with_reason(DesugaringKind::Async, span, self.allow_gen_future.clone());
+
+        let hir_id = if parent_has_track_caller {
+            let generator_hir_id = self.lower_node_id(closure_node_id);
+            self.lower_attrs(
+                generator_hir_id,
+                &[Attribute {
+                    kind: AttrKind::Normal(ptr::P(NormalAttr {
+                        item: AttrItem {
+                            path: Path::from_ident(Ident::new(sym::track_caller, span)),
+                            args: MacArgs::Empty,
+                            tokens: None,
+                        },
+                        tokens: None,
+                    })),
+                    id: self.tcx.sess.parse_sess.attr_id_generator.mk_attr_id(),
+                    style: AttrStyle::Outer,
+                    span: unstable_span,
+                }],
+            );
+            generator_hir_id
+        } else {
+            self.lower_node_id(closure_node_id)
         };
 
+        let generator = hir::Expr { hir_id, kind: generator_kind, span: self.lower_span(span) };
+
         // `future::from_generator`:
-        let unstable_span =
-            self.mark_span_with_reason(DesugaringKind::Async, span, self.allow_gen_future.clone());
         let gen_future = self.expr_lang_item_path(
             unstable_span,
             hir::LangItem::FromGenerator,

compiler/rustc_ast_lowering/src/item.rs

@@ -6,7 +6,6 @@ use super::{FnDeclKind, LoweringContext, ParamMode};
 use rustc_ast::ptr::P;
 use rustc_ast::visit::AssocCtxt;
 use rustc_ast::*;
-use rustc_data_structures::fx::FxHashMap;
 use rustc_data_structures::sorted_map::SortedMap;
 use rustc_hir as hir;
 use rustc_hir::def::{DefKind, Res};
@@ -67,7 +66,7 @@ impl<'a, 'hir> ItemLowerer<'a, 'hir> {
             // HirId handling.
             bodies: Vec::new(),
             attrs: SortedMap::default(),
-            children: FxHashMap::default(),
+            children: Vec::default(),
             current_hir_id_owner: hir::CRATE_OWNER_ID,
             item_local_id_counter: hir::ItemLocalId::new(0),
             node_id_to_local_id: Default::default(),
@@ -86,7 +85,7 @@ impl<'a, 'hir> ItemLowerer<'a, 'hir> {
             impl_trait_defs: Vec::new(),
             impl_trait_bounds: Vec::new(),
             allow_try_trait: Some([sym::try_trait_v2, sym::yeet_desugar_details][..].into()),
-            allow_gen_future: Some([sym::gen_future][..].into()),
+            allow_gen_future: Some([sym::gen_future, sym::closure_track_caller][..].into()),
             allow_into_future: Some([sym::into_future][..].into()),
             generics_def_id_map: Default::default(),
         };
@@ -534,12 +533,12 @@ impl<'hir> LoweringContext<'_, 'hir> {
                 for new_node_id in [id1, id2] {
                     let new_id = self.local_def_id(new_node_id);
                     let Some(res) = resolutions.next() else {
+                        debug_assert!(self.children.iter().find(|(id, _)| id == &new_id).is_none());
                         // Associate an HirId to both ids even if there is no resolution.
-                        let _old = self.children.insert(
+                        self.children.push((
                             new_id,
-                            hir::MaybeOwner::NonOwner(hir::HirId::make_owner(new_id)),
+                            hir::MaybeOwner::NonOwner(hir::HirId::make_owner(new_id))),
                         );
-                        debug_assert!(_old.is_none());
                         continue;
                     };
                     let ident = *ident;

compiler/rustc_ast_lowering/src/lib.rs

@@ -34,7 +34,6 @@
 #![feature(let_chains)]
 #![feature(never_type)]
 #![recursion_limit = "256"]
-#![allow(rustc::potential_query_instability)]
 #![deny(rustc::untranslatable_diagnostic)]
 #![deny(rustc::diagnostic_outside_of_impl)]
 
@@ -107,7 +106,7 @@ struct LoweringContext<'a, 'hir> {
     /// Attributes inside the owner being lowered.
     attrs: SortedMap<hir::ItemLocalId, &'hir [Attribute]>,
     /// Collect items that were created by lowering the current owner.
-    children: FxHashMap<LocalDefId, hir::MaybeOwner<&'hir hir::OwnerInfo<'hir>>>,
+    children: Vec<(LocalDefId, hir::MaybeOwner<&'hir hir::OwnerInfo<'hir>>)>,
 
     generator_kind: Option<hir::GeneratorKind>,
 
@@ -611,8 +610,8 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
         self.impl_trait_defs = current_impl_trait_defs;
         self.impl_trait_bounds = current_impl_trait_bounds;
 
-        let _old = self.children.insert(def_id, hir::MaybeOwner::Owner(info));
-        debug_assert!(_old.is_none())
+        debug_assert!(self.children.iter().find(|(id, _)| id == &def_id).is_none());
+        self.children.push((def_id, hir::MaybeOwner::Owner(info)));
     }
 
     /// Installs the remapping `remap` in scope while `f` is being executed.
@@ -719,8 +718,7 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
 
                 assert_ne!(local_id, hir::ItemLocalId::new(0));
                 if let Some(def_id) = self.opt_local_def_id(ast_node_id) {
-                    // Do not override a `MaybeOwner::Owner` that may already here.
-                    self.children.entry(def_id).or_insert(hir::MaybeOwner::NonOwner(hir_id));
+                    self.children.push((def_id, hir::MaybeOwner::NonOwner(hir_id)));
                     self.local_id_to_def_id.insert(local_id, def_id);
                 }
 

compiler/rustc_borrowck/src/region_infer/opaque_types.rs

@@ -7,9 +7,7 @@ use rustc_infer::infer::{DefiningAnchor, InferCtxt};
 use rustc_infer::traits::{Obligation, ObligationCause};
 use rustc_middle::ty::subst::{GenericArgKind, InternalSubsts};
 use rustc_middle::ty::visit::TypeVisitable;
-use rustc_middle::ty::{
-    self, OpaqueHiddenType, OpaqueTypeKey, ToPredicate, Ty, TyCtxt, TypeFoldable,
-};
+use rustc_middle::ty::{self, OpaqueHiddenType, OpaqueTypeKey, Ty, TyCtxt, TypeFoldable};
 use rustc_span::Span;
 use rustc_trait_selection::traits::error_reporting::TypeErrCtxtExt as _;
 use rustc_trait_selection::traits::ObligationCtxt;
@@ -256,8 +254,7 @@ impl<'tcx> InferCtxtExt<'tcx> for InferCtxt<'tcx> {
         // Require the hidden type to be well-formed with only the generics of the opaque type.
         // Defining use functions may have more bounds than the opaque type, which is ok, as long as the
         // hidden type is well formed even without those bounds.
-        let predicate = ty::Binder::dummy(ty::PredicateKind::WellFormed(definition_ty.into()))
-            .to_predicate(infcx.tcx);
+        let predicate = ty::Binder::dummy(ty::PredicateKind::WellFormed(definition_ty.into()));
 
         let id_substs = InternalSubsts::identity_for_item(self.tcx, def_id.to_def_id());
 
@@ -282,6 +279,7 @@ impl<'tcx> InferCtxtExt<'tcx> for InferCtxt<'tcx> {
         }
 
         ocx.register_obligation(Obligation::misc(
+            infcx.tcx,
             instantiated_ty.span,
             body_id,
             param_env,

compiler/rustc_borrowck/src/type_check/canonical.rs

@@ -92,8 +92,7 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
                 trait_ref,
                 constness: ty::BoundConstness::NotConst,
                 polarity: ty::ImplPolarity::Positive,
-            }))
-            .to_predicate(self.tcx()),
+            })),
             locations,
             category,
         );
@@ -122,26 +121,26 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
 
     pub(super) fn prove_predicates(
         &mut self,
-        predicates: impl IntoIterator<Item = impl ToPredicate<'tcx>>,
+        predicates: impl IntoIterator<
+            Item = impl ToPredicate<'tcx, ty::Predicate<'tcx>> + std::fmt::Debug,
+        >,
         locations: Locations,
         category: ConstraintCategory<'tcx>,
     ) {
         for predicate in predicates {
-            let predicate = predicate.to_predicate(self.tcx());
-            debug!("prove_predicates(predicate={:?}, locations={:?})", predicate, locations,);
-
             self.prove_predicate(predicate, locations, category);
         }
     }
 
     #[instrument(skip(self), level = "debug")]
     pub(super) fn prove_predicate(
         &mut self,
-        predicate: ty::Predicate<'tcx>,
+        predicate: impl ToPredicate<'tcx, ty::Predicate<'tcx>> + std::fmt::Debug,
         locations: Locations,
         category: ConstraintCategory<'tcx>,
     ) {
         let param_env = self.param_env;
+        let predicate = predicate.to_predicate(self.tcx());
         self.fully_perform_op(
             locations,
             category,

compiler/rustc_borrowck/src/type_check/mod.rs

@@ -33,8 +33,7 @@ use rustc_middle::ty::subst::{SubstsRef, UserSubsts};
 use rustc_middle::ty::visit::TypeVisitable;
 use rustc_middle::ty::{
     self, Binder, CanonicalUserTypeAnnotation, CanonicalUserTypeAnnotations, Dynamic,
-    OpaqueHiddenType, OpaqueTypeKey, RegionVid, ToPredicate, Ty, TyCtxt, UserType,
-    UserTypeAnnotationIndex,
+    OpaqueHiddenType, OpaqueTypeKey, RegionVid, Ty, TyCtxt, UserType, UserTypeAnnotationIndex,
 };
 use rustc_span::def_id::CRATE_DEF_ID;
 use rustc_span::{Span, DUMMY_SP};
@@ -1069,8 +1068,7 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
                     }
 
                     self.prove_predicate(
-                        ty::Binder::dummy(ty::PredicateKind::WellFormed(inferred_ty.into()))
-                            .to_predicate(self.tcx()),
+                        ty::Binder::dummy(ty::PredicateKind::WellFormed(inferred_ty.into())),
                         Locations::All(span),
                         ConstraintCategory::TypeAnnotation,
                     );

compiler/rustc_const_eval/src/transform/check_consts/check.rs

@@ -732,7 +732,7 @@ impl<'tcx> Visitor<'tcx> for Checker<'_, 'tcx> {
                         polarity: ty::ImplPolarity::Positive,
                     });
                     let obligation =
-                        Obligation::new(ObligationCause::dummy(), param_env, poly_trait_pred);
+                        Obligation::new(tcx, ObligationCause::dummy(), param_env, poly_trait_pred);
 
                     let implsrc = {
                         let infcx = tcx.infer_ctxt().build();
@@ -816,6 +816,7 @@ impl<'tcx> Visitor<'tcx> for Checker<'_, 'tcx> {
 
                             if !nonconst_call_permission {
                                 let obligation = Obligation::new(
+                                    tcx,
                                     ObligationCause::dummy_with_span(*fn_span),
                                     param_env,
                                     tcx.mk_predicate(

compiler/rustc_const_eval/src/transform/check_consts/mod.rs

@@ -62,7 +62,7 @@ impl<'mir, 'tcx> ConstCx<'mir, 'tcx> {
     }
 
     fn is_async(&self) -> bool {
-        self.tcx.asyncness(self.def_id()) == hir::IsAsync::Async
+        self.tcx.asyncness(self.def_id()).is_async()
     }
 }
 

compiler/rustc_const_eval/src/transform/check_consts/ops.rs

@@ -147,6 +147,7 @@ impl<'tcx> NonConstOp<'tcx> for FnCallNonConst<'tcx> {
                 }
                 Adt(..) => {
                     let obligation = Obligation::new(
+                        tcx,
                         ObligationCause::dummy(),
                         param_env,
                         Binder::dummy(TraitPredicate {