Rollup of 9 pull requests

compiler/rustc_feature/src/accepted.rs

@@ -53,6 +53,8 @@ declare_features! (
     /// Allows the sysV64 ABI to be specified on all platforms
     /// instead of just the platforms on which it is the C ABI.
     (accepted, abi_sysv64, "1.24.0", Some(36167), None),
+    /// Allows using the `thiscall` ABI.
+    (accepted, abi_thiscall, "1.19.0", None, None),
     /// Allows using ADX intrinsics from `core::arch::{x86, x86_64}`.
     (accepted, adx_target_feature, "1.61.0", Some(44839), None),
     /// Allows explicit discriminants on non-unit enum variants.

compiler/rustc_feature/src/active.rs

@@ -156,8 +156,6 @@ declare_features! (
     // -------------------------------------------------------------------------
     // no-tracking-issue-start
 
-    /// Allows using the `thiscall` ABI.
-    (active, abi_thiscall, "1.19.0", None, None),
     /// Allows using the `unadjusted` ABI; perma-unstable.
     (active, abi_unadjusted, "1.16.0", None, None),
     /// Allows using the `vectorcall` ABI.

compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp

@@ -1120,9 +1120,15 @@ struct LLVMRustThinLTOData {
 
   // Not 100% sure what these are, but they impact what's internalized and
   // what's inlined across modules, I believe.
+#if LLVM_VERSION_GE(17, 0)
+  DenseMap<StringRef, FunctionImporter::ImportMapTy> ImportLists;
+  DenseMap<StringRef, FunctionImporter::ExportSetTy> ExportLists;
+  DenseMap<StringRef, GVSummaryMapTy> ModuleToDefinedGVSummaries;
+#else
   StringMap<FunctionImporter::ImportMapTy> ImportLists;
   StringMap<FunctionImporter::ExportSetTy> ExportLists;
   StringMap<GVSummaryMapTy> ModuleToDefinedGVSummaries;
+#endif
   StringMap<std::map<GlobalValue::GUID, GlobalValue::LinkageTypes>> ResolvedODR;
 
   LLVMRustThinLTOData() : Index(/* HaveGVs = */ false) {}

compiler/rustc_smir/src/rustc_internal/mod.rs

@@ -68,6 +68,10 @@ impl<'tcx> Tables<'tcx> {
         self.def_ids[item.0]
     }
 
+    pub fn trait_def_id(&self, trait_def: &stable_mir::ty::TraitDef) -> DefId {
+        self.def_ids[trait_def.0]
+    }
+
     pub fn crate_item(&mut self, did: DefId) -> stable_mir::CrateItem {
         stable_mir::CrateItem(self.create_def_id(did))
     }

compiler/rustc_smir/src/rustc_smir/mod.rs

@@ -41,6 +41,21 @@ impl<'tcx> Context for Tables<'tcx> {
     fn entry_fn(&mut self) -> Option<stable_mir::CrateItem> {
         Some(self.crate_item(self.tcx.entry_fn(())?.0))
     }
+
+    fn all_trait_decls(&mut self) -> stable_mir::TraitDecls {
+        self.tcx
+            .traits(LOCAL_CRATE)
+            .iter()
+            .map(|trait_def_id| self.trait_def(*trait_def_id))
+            .collect()
+    }
+
+    fn trait_decl(&mut self, trait_def: &stable_mir::ty::TraitDef) -> stable_mir::ty::TraitDecl {
+        let def_id = self.trait_def_id(trait_def);
+        let trait_def = self.tcx.trait_def(def_id);
+        trait_def.stable(self)
+    }
+
     fn mir_body(&mut self, item: &stable_mir::CrateItem) -> stable_mir::mir::Body {
         let def_id = self.item_def_id(item);
         let mir = self.tcx.optimized_mir(def_id);
@@ -515,7 +530,7 @@ impl<'tcx> Stable<'tcx> for mir::RetagKind {
     }
 }
 
-impl<'tcx> Stable<'tcx> for rustc_middle::ty::UserTypeAnnotationIndex {
+impl<'tcx> Stable<'tcx> for ty::UserTypeAnnotationIndex {
     type T = usize;
     fn stable(&self, _: &mut Tables<'tcx>) -> Self::T {
         self.as_usize()
@@ -826,7 +841,7 @@ impl<'tcx> Stable<'tcx> for ty::FnSig<'tcx> {
     type T = stable_mir::ty::FnSig;
     fn stable(&self, tables: &mut Tables<'tcx>) -> Self::T {
         use rustc_target::spec::abi;
-        use stable_mir::ty::{Abi, FnSig, Unsafety};
+        use stable_mir::ty::{Abi, FnSig};
 
         FnSig {
             inputs_and_output: self
@@ -835,10 +850,7 @@ impl<'tcx> Stable<'tcx> for ty::FnSig<'tcx> {
                 .map(|ty| tables.intern_ty(ty))
                 .collect(),
             c_variadic: self.c_variadic,
-            unsafety: match self.unsafety {
-                hir::Unsafety::Normal => Unsafety::Normal,
-                hir::Unsafety::Unsafe => Unsafety::Unsafe,
-            },
+            unsafety: self.unsafety.stable(tables),
             abi: match self.abi {
                 abi::Abi::Rust => Abi::Rust,
                 abi::Abi::C { unwind } => Abi::C { unwind },
@@ -1048,15 +1060,15 @@ impl<'tcx> Stable<'tcx> for Ty<'tcx> {
     }
 }
 
-impl<'tcx> Stable<'tcx> for rustc_middle::ty::ParamTy {
+impl<'tcx> Stable<'tcx> for ty::ParamTy {
     type T = stable_mir::ty::ParamTy;
     fn stable(&self, _: &mut Tables<'tcx>) -> Self::T {
         use stable_mir::ty::ParamTy;
         ParamTy { index: self.index, name: self.name.to_string() }
     }
 }
 
-impl<'tcx> Stable<'tcx> for rustc_middle::ty::BoundTy {
+impl<'tcx> Stable<'tcx> for ty::BoundTy {
     type T = stable_mir::ty::BoundTy;
     fn stable(&self, tables: &mut Tables<'tcx>) -> Self::T {
         use stable_mir::ty::BoundTy;
@@ -1094,3 +1106,42 @@ impl<'tcx> Stable<'tcx> for mir::interpret::Allocation {
         }
     }
 }
+
+impl<'tcx> Stable<'tcx> for ty::trait_def::TraitSpecializationKind {
+    type T = stable_mir::ty::TraitSpecializationKind;
+    fn stable(&self, _: &mut Tables<'tcx>) -> Self::T {
+        use stable_mir::ty::TraitSpecializationKind;
+
+        match self {
+            ty::trait_def::TraitSpecializationKind::None => TraitSpecializationKind::None,
+            ty::trait_def::TraitSpecializationKind::Marker => TraitSpecializationKind::Marker,
+            ty::trait_def::TraitSpecializationKind::AlwaysApplicable => {
+                TraitSpecializationKind::AlwaysApplicable
+            }
+        }
+    }
+}
+
+impl<'tcx> Stable<'tcx> for ty::TraitDef {
+    type T = stable_mir::ty::TraitDecl;
+    fn stable(&self, tables: &mut Tables<'tcx>) -> Self::T {
+        use stable_mir::ty::TraitDecl;
+
+        TraitDecl {
+            def_id: rustc_internal::trait_def(self.def_id),
+            unsafety: self.unsafety.stable(tables),
+            paren_sugar: self.paren_sugar,
+            has_auto_impl: self.has_auto_impl,
+            is_marker: self.is_marker,
+            is_coinductive: self.is_coinductive,
+            skip_array_during_method_dispatch: self.skip_array_during_method_dispatch,
+            specialization_kind: self.specialization_kind.stable(tables),
+            must_implement_one_of: self
+                .must_implement_one_of
+                .as_ref()
+                .map(|idents| idents.iter().map(|ident| opaque(ident)).collect()),
+            implement_via_object: self.implement_via_object,
+            deny_explicit_impl: self.deny_explicit_impl,
+        }
+    }
+}

compiler/rustc_smir/src/stable_mir/mod.rs

@@ -15,7 +15,7 @@ use std::cell::Cell;
 
 use crate::rustc_smir::Tables;
 
-use self::ty::{Ty, TyKind};
+use self::ty::{TraitDecl, TraitDef, Ty, TyKind};
 
 pub mod mir;
 pub mod ty;
@@ -32,6 +32,9 @@ pub type DefId = usize;
 /// A list of crate items.
 pub type CrateItems = Vec<CrateItem>;
 
+/// A list of crate items.
+pub type TraitDecls = Vec<TraitDef>;
+
 /// Holds information about a crate.
 #[derive(Clone, PartialEq, Eq, Debug)]
 pub struct Crate {
@@ -84,6 +87,8 @@ pub trait Context {
     /// Retrieve all items of the local crate that have a MIR associated with them.
     fn all_local_items(&mut self) -> CrateItems;
     fn mir_body(&mut self, item: &CrateItem) -> mir::Body;
+    fn all_trait_decls(&mut self) -> TraitDecls;
+    fn trait_decl(&mut self, trait_def: &TraitDef) -> TraitDecl;
     /// Get information about the local crate.
     fn local_crate(&self) -> Crate;
     /// Retrieve a list of all external crates.

compiler/rustc_smir/src/stable_mir/ty.rs

@@ -1,4 +1,4 @@
-use super::{mir::Mutability, with, DefId};
+use super::{mir::Mutability, mir::Safety, with, DefId};
 use crate::rustc_internal::Opaque;
 
 #[derive(Copy, Clone, Debug)]
@@ -11,6 +11,7 @@ impl Ty {
 }
 
 pub(crate) type Const = Opaque;
+type Ident = Opaque;
 pub(crate) type Region = Opaque;
 type Span = Opaque;
 
@@ -104,6 +105,12 @@ pub struct AliasDef(pub(crate) DefId);
 #[derive(Clone, PartialEq, Eq, Debug)]
 pub struct TraitDef(pub(crate) DefId);
 
+impl TraitDef {
+    pub fn trait_decl(&self) -> TraitDecl {
+        with(|cx| cx.trait_decl(self))
+    }
+}
+
 #[derive(Clone, Debug)]
 pub struct GenericArgs(pub Vec<GenericArgKind>);
 
@@ -140,16 +147,10 @@ pub type PolyFnSig = Binder<FnSig>;
 pub struct FnSig {
     pub inputs_and_output: Vec<Ty>,
     pub c_variadic: bool,
-    pub unsafety: Unsafety,
+    pub unsafety: Safety,
     pub abi: Abi,
 }
 
-#[derive(Clone, PartialEq, Eq, Debug)]
-pub enum Unsafety {
-    Unsafe,
-    Normal,
-}
-
 #[derive(Clone, PartialEq, Eq, Debug)]
 pub enum Abi {
     Rust,
@@ -264,3 +265,23 @@ pub struct Allocation {
     pub align: Align,
     pub mutability: Mutability,
 }
+
+pub enum TraitSpecializationKind {
+    None,
+    Marker,
+    AlwaysApplicable,
+}
+
+pub struct TraitDecl {
+    pub def_id: TraitDef,
+    pub unsafety: Safety,
+    pub paren_sugar: bool,
+    pub has_auto_impl: bool,
+    pub is_marker: bool,
+    pub is_coinductive: bool,
+    pub skip_array_during_method_dispatch: bool,
+    pub specialization_kind: TraitSpecializationKind,
+    pub must_implement_one_of: Option<Vec<Ident>>,
+    pub implement_via_object: bool,
+    pub deny_explicit_impl: bool,
+}

compiler/rustc_target/src/spec/abi.rs

@@ -150,7 +150,8 @@ pub fn is_stable(name: &str) -> Result<(), AbiDisabled> {
         // Stable
         "Rust" | "C" | "C-unwind" | "cdecl" | "cdecl-unwind" | "stdcall" | "stdcall-unwind"
         | "fastcall" | "fastcall-unwind" | "aapcs" | "aapcs-unwind" | "win64" | "win64-unwind"
-        | "sysv64" | "sysv64-unwind" | "system" | "system-unwind" | "efiapi" => Ok(()),
+        | "sysv64" | "sysv64-unwind" | "system" | "system-unwind" | "efiapi" | "thiscall"
+        | "thiscall-unwind" => Ok(()),
         "rust-intrinsic" => Err(AbiDisabled::Unstable {
             feature: sym::intrinsics,
             explain: "intrinsics are subject to change",
@@ -167,14 +168,6 @@ pub fn is_stable(name: &str) -> Result<(), AbiDisabled> {
             feature: sym::abi_vectorcall,
             explain: "vectorcall-unwind ABI is experimental and subject to change",
         }),
-        "thiscall" => Err(AbiDisabled::Unstable {
-            feature: sym::abi_thiscall,
-            explain: "thiscall is experimental and subject to change",
-        }),
-        "thiscall-unwind" => Err(AbiDisabled::Unstable {
-            feature: sym::abi_thiscall,
-            explain: "thiscall-unwind ABI is experimental and subject to change",
-        }),
         "rust-call" => Err(AbiDisabled::Unstable {
             feature: sym::unboxed_closures,
             explain: "rust-call ABI is subject to change",

compiler/rustc_target/src/spec/avr_gnu_base.rs

@@ -23,7 +23,7 @@ pub fn target(target_cpu: &'static str, mmcu: &'static str) -> Target {
                 LinkerFlavor::Gnu(Cc::Yes, Lld::No),
                 &["-lgcc"],
             ),
-            max_atomic_width: Some(0),
+            max_atomic_width: Some(16),
             atomic_cas: false,
             relocation_model: RelocModel::Static,
             ..TargetOptions::default()

compiler/rustc_target/src/spec/sparc_unknown_linux_gnu.rs

@@ -5,7 +5,7 @@ pub fn target() -> Target {
     let mut base = super::linux_gnu_base::opts();
     base.endian = Endian::Big;
     base.cpu = "v9".into();
-    base.max_atomic_width = Some(64);
+    base.max_atomic_width = Some(32);
     base.add_pre_link_args(LinkerFlavor::Gnu(Cc::Yes, Lld::No), &["-mv8plus"]);
 
     Target {

compiler/rustc_trait_selection/src/solve/assembly/mod.rs

@@ -152,16 +152,12 @@ pub(super) trait GoalKind<'tcx>:
             let ty::Dynamic(bounds, _, _) = *goal.predicate.self_ty().kind() else {
                 bug!("expected object type in `consider_object_bound_candidate`");
             };
-            ecx.add_goals(
-                structural_traits::predicates_for_object_candidate(
-                    &ecx,
-                    goal.param_env,
-                    goal.predicate.trait_ref(tcx),
-                    bounds,
-                )
-                .into_iter()
-                .map(|pred| goal.with(tcx, pred)),
-            );
+            ecx.add_goals(structural_traits::predicates_for_object_candidate(
+                &ecx,
+                goal.param_env,
+                goal.predicate.trait_ref(tcx),
+                bounds,
+            ));
             ecx.evaluate_added_goals_and_make_canonical_response(Certainty::Yes)
         })
     }

compiler/rustc_trait_selection/src/solve/assembly/structural_traits.rs

@@ -3,6 +3,7 @@
 use rustc_data_structures::fx::FxHashMap;
 use rustc_hir::{def_id::DefId, Movability, Mutability};
 use rustc_infer::traits::query::NoSolution;
+use rustc_middle::traits::solve::Goal;
 use rustc_middle::ty::{
     self, Ty, TyCtxt, TypeFoldable, TypeFolder, TypeSuperFoldable, TypeVisitableExt,
 };
@@ -345,7 +346,7 @@ pub(in crate::solve) fn predicates_for_object_candidate<'tcx>(
     param_env: ty::ParamEnv<'tcx>,
     trait_ref: ty::TraitRef<'tcx>,
     object_bound: &'tcx ty::List<ty::PolyExistentialPredicate<'tcx>>,
-) -> Vec<ty::Clause<'tcx>> {
+) -> Vec<Goal<'tcx, ty::Predicate<'tcx>>> {
     let tcx = ecx.tcx();
     let mut requirements = vec![];
     requirements.extend(
@@ -376,17 +377,22 @@ pub(in crate::solve) fn predicates_for_object_candidate<'tcx>(
         }
     }
 
-    requirements.fold_with(&mut ReplaceProjectionWith {
-        ecx,
-        param_env,
-        mapping: replace_projection_with,
-    })
+    let mut folder =
+        ReplaceProjectionWith { ecx, param_env, mapping: replace_projection_with, nested: vec![] };
+    let folded_requirements = requirements.fold_with(&mut folder);
+
+    folder
+        .nested
+        .into_iter()
+        .chain(folded_requirements.into_iter().map(|clause| Goal::new(tcx, param_env, clause)))
+        .collect()
 }
 
 struct ReplaceProjectionWith<'a, 'tcx> {
     ecx: &'a EvalCtxt<'a, 'tcx>,
     param_env: ty::ParamEnv<'tcx>,
     mapping: FxHashMap<DefId, ty::PolyProjectionPredicate<'tcx>>,
+    nested: Vec<Goal<'tcx, ty::Predicate<'tcx>>>,
 }
 
 impl<'tcx> TypeFolder<TyCtxt<'tcx>> for ReplaceProjectionWith<'_, 'tcx> {
@@ -402,13 +408,12 @@ impl<'tcx> TypeFolder<TyCtxt<'tcx>> for ReplaceProjectionWith<'_, 'tcx> {
             // but the where clauses we instantiated are not. We can solve this by instantiating
             // the binder at the usage site.
             let proj = self.ecx.instantiate_binder_with_infer(*replacement);
-            // FIXME: Technically this folder could be fallible?
-            let nested = self
-                .ecx
-                .eq_and_get_goals(self.param_env, alias_ty, proj.projection_ty)
-                .expect("expected to be able to unify goal projection with dyn's projection");
-            // FIXME: Technically we could register these too..
-            assert!(nested.is_empty(), "did not expect unification to have any nested goals");
+            // FIXME: Technically this equate could be fallible...
+            self.nested.extend(
+                self.ecx
+                    .eq_and_get_goals(self.param_env, alias_ty, proj.projection_ty)
+                    .expect("expected to be able to unify goal projection with dyn's projection"),
+            );
             proj.term.ty().unwrap()
         } else {
             ty.super_fold_with(self)

library/panic_unwind/src/lib.rs

@@ -19,7 +19,7 @@
 #![feature(panic_unwind)]
 #![feature(staged_api)]
 #![feature(std_internals)]
-#![feature(abi_thiscall)]
+#![cfg_attr(bootstrap, feature(abi_thiscall))]
 #![feature(rustc_attrs)]
 #![panic_runtime]
 #![feature(panic_runtime)]