compiler/rustc_smir/src/stable_mir/compiler_interface.rs - third_party/rust - Git at Google

 //! Define the interface with the Rust compiler.
 //!
 //! StableMIR users should not use any of the items in this module directly.
 //! These APIs have no stability guarantee.

 use std::cell::Cell;

 use rustc_smir::context::SmirCtxt;
 use stable_mir::abi::{FnAbi, Layout, LayoutShape};
 use stable_mir::crate_def::Attribute;
 use stable_mir::mir::alloc::{AllocId, GlobalAlloc};
 use stable_mir::mir::mono::{Instance, InstanceDef, StaticDef};
 use stable_mir::mir::{BinOp, Body, Place, UnOp};
 use stable_mir::target::MachineInfo;
 use stable_mir::ty::{
     AdtDef, AdtKind, Allocation, ClosureDef, ClosureKind, FieldDef, FnDef, ForeignDef,
     ForeignItemKind, ForeignModule, ForeignModuleDef, GenericArgs, GenericPredicates, Generics,
     ImplDef, ImplTrait, IntrinsicDef, LineInfo, MirConst, PolyFnSig, RigidTy, Span, TraitDecl,
     TraitDef, Ty, TyConst, TyConstId, TyKind, UintTy, VariantDef,
 };
 use stable_mir::{
     AssocItems, Crate, CrateItem, CrateItems, CrateNum, DefId, Error, Filename, ImplTraitDecls,
     ItemKind, Symbol, TraitDecls, mir,
 };

 use crate::{rustc_smir, stable_mir};

 /// Stable public API for querying compiler information.
 ///
 /// All queries are delegated to an internal [`SmirCtxt`] that provides
 /// similar APIs but based on internal rustc constructs.
 ///
 /// Do not use this directly. This is currently used in the macro expansion.
 pub(crate) struct SmirInterface<'tcx> {
     pub(crate) cx: SmirCtxt<'tcx>,
 }

 impl<'tcx> SmirInterface<'tcx> {
     pub(crate) fn entry_fn(&self) -> Option<CrateItem> {
         self.cx.entry_fn()
     }

     /// Retrieve all items of the local crate that have a MIR associated with them.
     pub(crate) fn all_local_items(&self) -> CrateItems {
         self.cx.all_local_items()
     }

     /// Retrieve the body of a function.
     /// This function will panic if the body is not available.
     pub(crate) fn mir_body(&self, item: DefId) -> mir::Body {
         self.cx.mir_body(item)
     }

     /// Check whether the body of a function is available.
     pub(crate) fn has_body(&self, item: DefId) -> bool {
         self.cx.has_body(item)
     }

     pub(crate) fn foreign_modules(&self, crate_num: CrateNum) -> Vec<ForeignModuleDef> {
         self.cx.foreign_modules(crate_num)
     }

     /// Retrieve all functions defined in this crate.
     pub(crate) fn crate_functions(&self, crate_num: CrateNum) -> Vec<FnDef> {
         self.cx.crate_functions(crate_num)
     }

     /// Retrieve all static items defined in this crate.
     pub(crate) fn crate_statics(&self, crate_num: CrateNum) -> Vec<StaticDef> {
         self.cx.crate_statics(crate_num)
     }

     pub(crate) fn foreign_module(&self, mod_def: ForeignModuleDef) -> ForeignModule {
         self.cx.foreign_module(mod_def)
     }

     pub(crate) fn foreign_items(&self, mod_def: ForeignModuleDef) -> Vec<ForeignDef> {
         self.cx.foreign_items(mod_def)
     }

     pub(crate) fn all_trait_decls(&self) -> TraitDecls {
         self.cx.all_trait_decls()
     }

     pub(crate) fn trait_decls(&self, crate_num: CrateNum) -> TraitDecls {
         self.cx.trait_decls(crate_num)
     }

     pub(crate) fn trait_decl(&self, trait_def: &TraitDef) -> TraitDecl {
         self.cx.trait_decl(trait_def)
     }

     pub(crate) fn all_trait_impls(&self) -> ImplTraitDecls {
         self.cx.all_trait_impls()
     }

     pub(crate) fn trait_impls(&self, crate_num: CrateNum) -> ImplTraitDecls {
         self.cx.trait_impls(crate_num)
     }

     pub(crate) fn trait_impl(&self, trait_impl: &ImplDef) -> ImplTrait {
         self.cx.trait_impl(trait_impl)
     }

     pub(crate) fn generics_of(&self, def_id: DefId) -> Generics {
         self.cx.generics_of(def_id)
     }

     pub(crate) fn predicates_of(&self, def_id: DefId) -> GenericPredicates {
         self.cx.predicates_of(def_id)
     }

     pub(crate) fn explicit_predicates_of(&self, def_id: DefId) -> GenericPredicates {
         self.cx.explicit_predicates_of(def_id)
     }

     /// Get information about the local crate.
     pub(crate) fn local_crate(&self) -> Crate {
         self.cx.local_crate()
     }

     /// Retrieve a list of all external crates.
     pub(crate) fn external_crates(&self) -> Vec<Crate> {
         self.cx.external_crates()
     }

     /// Find a crate with the given name.
     pub(crate) fn find_crates(&self, name: &str) -> Vec<Crate> {
         self.cx.find_crates(name)
     }

     /// Returns the name of given `DefId`.
     pub(crate) fn def_name(&self, def_id: DefId, trimmed: bool) -> Symbol {
         self.cx.def_name(def_id, trimmed)
     }

     /// Return registered tool attributes with the given attribute name.
     ///
     /// FIXME(jdonszelmann): may panic on non-tool attributes. After more attribute work, non-tool
     /// attributes will simply return an empty list.
     ///
     /// Single segmented name like `#[clippy]` is specified as `&["clippy".to_string()]`.
     /// Multi-segmented name like `#[rustfmt::skip]` is specified as `&["rustfmt".to_string(), "skip".to_string()]`.
     pub(crate) fn tool_attrs(&self, def_id: DefId, attr: &[Symbol]) -> Vec<Attribute> {
         self.cx.tool_attrs(def_id, attr)
     }

     /// Get all tool attributes of a definition.
     pub(crate) fn all_tool_attrs(&self, def_id: DefId) -> Vec<Attribute> {
         self.cx.all_tool_attrs(def_id)
     }

     /// Returns printable, human readable form of `Span`.
     pub(crate) fn span_to_string(&self, span: Span) -> String {
         self.cx.span_to_string(span)
     }

     /// Return filename from given `Span`, for diagnostic purposes.
     pub(crate) fn get_filename(&self, span: &Span) -> Filename {
         self.cx.get_filename(span)
     }

     /// Return lines corresponding to this `Span`.
     pub(crate) fn get_lines(&self, span: &Span) -> LineInfo {
         self.cx.get_lines(span)
     }

     /// Returns the `kind` of given `DefId`.
     pub(crate) fn item_kind(&self, item: CrateItem) -> ItemKind {
         self.cx.item_kind(item)
     }

     /// Returns whether this is a foreign item.
     pub(crate) fn is_foreign_item(&self, item: DefId) -> bool {
         self.cx.is_foreign_item(item)
     }

     /// Returns the kind of a given foreign item.
     pub(crate) fn foreign_item_kind(&self, def: ForeignDef) -> ForeignItemKind {
         self.cx.foreign_item_kind(def)
     }

     /// Returns the kind of a given algebraic data type.
     pub(crate) fn adt_kind(&self, def: AdtDef) -> AdtKind {
         self.cx.adt_kind(def)
     }

     /// Returns if the ADT is a box.
     pub(crate) fn adt_is_box(&self, def: AdtDef) -> bool {
         self.cx.adt_is_box(def)
     }

     /// Returns whether this ADT is simd.
     pub(crate) fn adt_is_simd(&self, def: AdtDef) -> bool {
         self.cx.adt_is_simd(def)
     }

     /// Returns whether this definition is a C string.
     pub(crate) fn adt_is_cstr(&self, def: AdtDef) -> bool {
         self.cx.adt_is_cstr(def)
     }

     /// Retrieve the function signature for the given generic arguments.
     pub(crate) fn fn_sig(&self, def: FnDef, args: &GenericArgs) -> PolyFnSig {
         self.cx.fn_sig(def, args)
     }

     /// Retrieve the intrinsic definition if the item corresponds one.
     pub(crate) fn intrinsic(&self, item: DefId) -> Option<IntrinsicDef> {
         self.cx.intrinsic(item)
     }

     /// Retrieve the plain function name of an intrinsic.
     pub(crate) fn intrinsic_name(&self, def: IntrinsicDef) -> Symbol {
         self.cx.intrinsic_name(def)
     }

     /// Retrieve the closure signature for the given generic arguments.
     pub(crate) fn closure_sig(&self, args: &GenericArgs) -> PolyFnSig {
         self.cx.closure_sig(args)
     }

     /// The number of variants in this ADT.
     pub(crate) fn adt_variants_len(&self, def: AdtDef) -> usize {
         self.cx.adt_variants_len(def)
     }

     /// The name of a variant.
     pub(crate) fn variant_name(&self, def: VariantDef) -> Symbol {
         self.cx.variant_name(def)
     }

     pub(crate) fn variant_fields(&self, def: VariantDef) -> Vec<FieldDef> {
         self.cx.variant_fields(def)
     }

     /// Evaluate constant as a target usize.
     pub(crate) fn eval_target_usize(&self, cnst: &MirConst) -> Result<u64, Error> {
         self.cx.eval_target_usize(cnst)
     }

     pub(crate) fn eval_target_usize_ty(&self, cnst: &TyConst) -> Result<u64, Error> {
         self.cx.eval_target_usize_ty(cnst)
     }

     /// Create a new zero-sized constant.
     pub(crate) fn try_new_const_zst(&self, ty: Ty) -> Result<MirConst, Error> {
         self.cx.try_new_const_zst(ty)
     }

     /// Create a new constant that represents the given string value.
     pub(crate) fn new_const_str(&self, value: &str) -> MirConst {
         self.cx.new_const_str(value)
     }

     /// Create a new constant that represents the given boolean value.
     pub(crate) fn new_const_bool(&self, value: bool) -> MirConst {
         self.cx.new_const_bool(value)
     }

     /// Create a new constant that represents the given value.
     pub(crate) fn try_new_const_uint(
         &self,
         value: u128,
         uint_ty: UintTy,
     ) -> Result<MirConst, Error> {
         self.cx.try_new_const_uint(value, uint_ty)
     }

     pub(crate) fn try_new_ty_const_uint(
         &self,
         value: u128,
         uint_ty: UintTy,
     ) -> Result<TyConst, Error> {
         self.cx.try_new_ty_const_uint(value, uint_ty)
     }

     /// Create a new type from the given kind.
     pub(crate) fn new_rigid_ty(&self, kind: RigidTy) -> Ty {
         self.cx.new_rigid_ty(kind)
     }

     /// Create a new box type, `Box<T>`, for the given inner type `T`.
     pub(crate) fn new_box_ty(&self, ty: Ty) -> Ty {
         self.cx.new_box_ty(ty)
     }

     /// Returns the type of given crate item.
     pub(crate) fn def_ty(&self, item: DefId) -> Ty {
         self.cx.def_ty(item)
     }

     /// Returns the type of given definition instantiated with the given arguments.
     pub(crate) fn def_ty_with_args(&self, item: DefId, args: &GenericArgs) -> Ty {
         self.cx.def_ty_with_args(item, args)
     }

     /// Returns literal value of a const as a string.
     pub(crate) fn mir_const_pretty(&self, cnst: &MirConst) -> String {
         self.cx.mir_const_pretty(cnst)
     }

     /// `Span` of an item.
     pub(crate) fn span_of_an_item(&self, def_id: DefId) -> Span {
         self.cx.span_of_an_item(def_id)
     }

     pub(crate) fn ty_const_pretty(&self, ct: TyConstId) -> String {
         self.cx.ty_const_pretty(ct)
     }

     /// Obtain the representation of a type.
     pub(crate) fn ty_pretty(&self, ty: Ty) -> String {
         self.cx.ty_pretty(ty)
     }

     /// Obtain the representation of a type.
     pub(crate) fn ty_kind(&self, ty: Ty) -> TyKind {
         self.cx.ty_kind(ty)
     }

     /// Get the discriminant Ty for this Ty if there's one.
     pub(crate) fn rigid_ty_discriminant_ty(&self, ty: &RigidTy) -> Ty {
         self.cx.rigid_ty_discriminant_ty(ty)
     }

     /// Get the body of an Instance which is already monomorphized.
     pub(crate) fn instance_body(&self, instance: InstanceDef) -> Option<Body> {
         self.cx.instance_body(instance)
     }

     /// Get the instance type with generic instantiations applied and lifetimes erased.
     pub(crate) fn instance_ty(&self, instance: InstanceDef) -> Ty {
         self.cx.instance_ty(instance)
     }

     /// Get the instantiation types.
     pub(crate) fn instance_args(&self, def: InstanceDef) -> GenericArgs {
         self.cx.instance_args(def)
     }

     /// Get the instance.
     pub(crate) fn instance_def_id(&self, instance: InstanceDef) -> DefId {
         self.cx.instance_def_id(instance)
     }

     /// Get the instance mangled name.
     pub(crate) fn instance_mangled_name(&self, instance: InstanceDef) -> Symbol {
         self.cx.instance_mangled_name(instance)
     }

     /// Check if this is an empty DropGlue shim.
     pub(crate) fn is_empty_drop_shim(&self, def: InstanceDef) -> bool {
         self.cx.is_empty_drop_shim(def)
     }

     /// Convert a non-generic crate item into an instance.
     /// This function will panic if the item is generic.
     pub(crate) fn mono_instance(&self, def_id: DefId) -> Instance {
         self.cx.mono_instance(def_id)
     }

     /// Item requires monomorphization.
     pub(crate) fn requires_monomorphization(&self, def_id: DefId) -> bool {
         self.cx.requires_monomorphization(def_id)
     }

     /// Resolve an instance from the given function definition and generic arguments.
     pub(crate) fn resolve_instance(&self, def: FnDef, args: &GenericArgs) -> Option<Instance> {
         self.cx.resolve_instance(def, args)
     }

     /// Resolve an instance for drop_in_place for the given type.
     pub(crate) fn resolve_drop_in_place(&self, ty: Ty) -> Instance {
         self.cx.resolve_drop_in_place(ty)
     }

     /// Resolve instance for a function pointer.
     pub(crate) fn resolve_for_fn_ptr(&self, def: FnDef, args: &GenericArgs) -> Option<Instance> {
         self.cx.resolve_for_fn_ptr(def, args)
     }

     /// Resolve instance for a closure with the requested type.
     pub(crate) fn resolve_closure(
         &self,
         def: ClosureDef,
         args: &GenericArgs,
         kind: ClosureKind,
     ) -> Option<Instance> {
         self.cx.resolve_closure(def, args, kind)
     }

     /// Evaluate a static's initializer.
     pub(crate) fn eval_static_initializer(&self, def: StaticDef) -> Result<Allocation, Error> {
         self.cx.eval_static_initializer(def)
     }

     /// Try to evaluate an instance into a constant.
     pub(crate) fn eval_instance(
         &self,
         def: InstanceDef,
         const_ty: Ty,
     ) -> Result<Allocation, Error> {
         self.cx.eval_instance(def, const_ty)
     }

     /// Retrieve global allocation for the given allocation ID.
     pub(crate) fn global_alloc(&self, id: AllocId) -> GlobalAlloc {
         self.cx.global_alloc(id)
     }

     /// Retrieve the id for the virtual table.
     pub(crate) fn vtable_allocation(&self, global_alloc: &GlobalAlloc) -> Option<AllocId> {
         self.cx.vtable_allocation(global_alloc)
     }

     pub(crate) fn krate(&self, def_id: DefId) -> Crate {
         self.cx.krate(def_id)
     }

     pub(crate) fn instance_name(&self, def: InstanceDef, trimmed: bool) -> Symbol {
         self.cx.instance_name(def, trimmed)
     }

     /// Return information about the target machine.
     pub(crate) fn target_info(&self) -> MachineInfo {
         self.cx.target_info()
     }

     /// Get an instance ABI.
     pub(crate) fn instance_abi(&self, def: InstanceDef) -> Result<FnAbi, Error> {
         self.cx.instance_abi(def)
     }

     /// Get the ABI of a function pointer.
     pub(crate) fn fn_ptr_abi(&self, fn_ptr: PolyFnSig) -> Result<FnAbi, Error> {
         self.cx.fn_ptr_abi(fn_ptr)
     }

     /// Get the layout of a type.
     pub(crate) fn ty_layout(&self, ty: Ty) -> Result<Layout, Error> {
         self.cx.ty_layout(ty)
     }

     /// Get the layout shape.
     pub(crate) fn layout_shape(&self, id: Layout) -> LayoutShape {
         self.cx.layout_shape(id)
     }

     /// Get a debug string representation of a place.
     pub(crate) fn place_pretty(&self, place: &Place) -> String {
         self.cx.place_pretty(place)
     }

     /// Get the resulting type of binary operation.
     pub(crate) fn binop_ty(&self, bin_op: BinOp, rhs: Ty, lhs: Ty) -> Ty {
         self.cx.binop_ty(bin_op, rhs, lhs)
     }

     /// Get the resulting type of unary operation.
     pub(crate) fn unop_ty(&self, un_op: UnOp, arg: Ty) -> Ty {
         self.cx.unop_ty(un_op, arg)
     }

     /// Get all associated items of a definition.
     pub(crate) fn associated_items(&self, def_id: DefId) -> AssocItems {
         self.cx.associated_items(def_id)
     }
 }

 // A thread local variable that stores a pointer to [`SmirInterface`].
 scoped_tls::scoped_thread_local!(static TLV: Cell<*const ()>);

 pub(crate) fn run<'tcx, T, F>(interface: &SmirInterface<'tcx>, f: F) -> Result<T, Error>
 where
     F: FnOnce() -> T,
 {
     if TLV.is_set() {
         Err(Error::from("StableMIR already running"))
     } else {
         let ptr: *const () = (interface as *const SmirInterface<'tcx>) as *const ();
         TLV.set(&Cell::new(ptr), || Ok(f()))
     }
 }

 /// Execute the given function with access the [`SmirInterface`].
 ///
 /// I.e., This function will load the current interface and calls a function with it.
 /// Do not nest these, as that will ICE.
 pub(crate) fn with<R>(f: impl FnOnce(&SmirInterface<'_>) -> R) -> R {
     assert!(TLV.is_set());
     TLV.with(|tlv| {
         let ptr = tlv.get();
         assert!(!ptr.is_null());
         f(unsafe { &*(ptr as *const SmirInterface<'_>) })
     })
 }
	//! Define the interface with the Rust compiler.
	//!
	//! StableMIR users should not use any of the items in this module directly.
	//! These APIs have no stability guarantee.

	use std::cell::Cell;

	use rustc_smir::context::SmirCtxt;
	use stable_mir::abi::{FnAbi, Layout, LayoutShape};
	use stable_mir::crate_def::Attribute;
	use stable_mir::mir::alloc::{AllocId, GlobalAlloc};
	use stable_mir::mir::mono::{Instance, InstanceDef, StaticDef};
	use stable_mir::mir::{BinOp, Body, Place, UnOp};
	use stable_mir::target::MachineInfo;
	use stable_mir::ty::{
	AdtDef, AdtKind, Allocation, ClosureDef, ClosureKind, FieldDef, FnDef, ForeignDef,
	ForeignItemKind, ForeignModule, ForeignModuleDef, GenericArgs, GenericPredicates, Generics,
	ImplDef, ImplTrait, IntrinsicDef, LineInfo, MirConst, PolyFnSig, RigidTy, Span, TraitDecl,
	TraitDef, Ty, TyConst, TyConstId, TyKind, UintTy, VariantDef,
	};
	use stable_mir::{
	AssocItems, Crate, CrateItem, CrateItems, CrateNum, DefId, Error, Filename, ImplTraitDecls,
	ItemKind, Symbol, TraitDecls, mir,
	};

	use crate::{rustc_smir, stable_mir};

	/// Stable public API for querying compiler information.
	///
	/// All queries are delegated to an internal [`SmirCtxt`] that provides
	/// similar APIs but based on internal rustc constructs.
	///
	/// Do not use this directly. This is currently used in the macro expansion.
	pub(crate) struct SmirInterface<'tcx> {
	pub(crate) cx: SmirCtxt<'tcx>,
	}

	impl<'tcx> SmirInterface<'tcx> {
	pub(crate) fn entry_fn(&self) -> Option<CrateItem> {
	self.cx.entry_fn()
	}

	/// Retrieve all items of the local crate that have a MIR associated with them.
	pub(crate) fn all_local_items(&self) -> CrateItems {
	self.cx.all_local_items()
	}

	/// Retrieve the body of a function.
	/// This function will panic if the body is not available.
	pub(crate) fn mir_body(&self, item: DefId) -> mir::Body {
	self.cx.mir_body(item)
	}

	/// Check whether the body of a function is available.
	pub(crate) fn has_body(&self, item: DefId) -> bool {
	self.cx.has_body(item)
	}

	pub(crate) fn foreign_modules(&self, crate_num: CrateNum) -> Vec<ForeignModuleDef> {
	self.cx.foreign_modules(crate_num)
	}

	/// Retrieve all functions defined in this crate.
	pub(crate) fn crate_functions(&self, crate_num: CrateNum) -> Vec<FnDef> {
	self.cx.crate_functions(crate_num)
	}

	/// Retrieve all static items defined in this crate.
	pub(crate) fn crate_statics(&self, crate_num: CrateNum) -> Vec<StaticDef> {
	self.cx.crate_statics(crate_num)
	}

	pub(crate) fn foreign_module(&self, mod_def: ForeignModuleDef) -> ForeignModule {
	self.cx.foreign_module(mod_def)
	}

	pub(crate) fn foreign_items(&self, mod_def: ForeignModuleDef) -> Vec<ForeignDef> {
	self.cx.foreign_items(mod_def)
	}

	pub(crate) fn all_trait_decls(&self) -> TraitDecls {
	self.cx.all_trait_decls()
	}

	pub(crate) fn trait_decls(&self, crate_num: CrateNum) -> TraitDecls {
	self.cx.trait_decls(crate_num)
	}

	pub(crate) fn trait_decl(&self, trait_def: &TraitDef) -> TraitDecl {
	self.cx.trait_decl(trait_def)
	}

	pub(crate) fn all_trait_impls(&self) -> ImplTraitDecls {
	self.cx.all_trait_impls()
	}

	pub(crate) fn trait_impls(&self, crate_num: CrateNum) -> ImplTraitDecls {
	self.cx.trait_impls(crate_num)
	}

	pub(crate) fn trait_impl(&self, trait_impl: &ImplDef) -> ImplTrait {
	self.cx.trait_impl(trait_impl)
	}

	pub(crate) fn generics_of(&self, def_id: DefId) -> Generics {
	self.cx.generics_of(def_id)
	}

	pub(crate) fn predicates_of(&self, def_id: DefId) -> GenericPredicates {
	self.cx.predicates_of(def_id)
	}

	pub(crate) fn explicit_predicates_of(&self, def_id: DefId) -> GenericPredicates {
	self.cx.explicit_predicates_of(def_id)
	}

	/// Get information about the local crate.
	pub(crate) fn local_crate(&self) -> Crate {
	self.cx.local_crate()
	}

	/// Retrieve a list of all external crates.
	pub(crate) fn external_crates(&self) -> Vec<Crate> {
	self.cx.external_crates()
	}

	/// Find a crate with the given name.
	pub(crate) fn find_crates(&self, name: &str) -> Vec<Crate> {
	self.cx.find_crates(name)
	}

	/// Returns the name of given `DefId`.
	pub(crate) fn def_name(&self, def_id: DefId, trimmed: bool) -> Symbol {
	self.cx.def_name(def_id, trimmed)
	}

	/// Return registered tool attributes with the given attribute name.
	///
	/// FIXME(jdonszelmann): may panic on non-tool attributes. After more attribute work, non-tool
	/// attributes will simply return an empty list.
	///
	/// Single segmented name like `#[clippy]` is specified as `&["clippy".to_string()]`.
	/// Multi-segmented name like `#[rustfmt::skip]` is specified as `&["rustfmt".to_string(), "skip".to_string()]`.
	pub(crate) fn tool_attrs(&self, def_id: DefId, attr: &[Symbol]) -> Vec<Attribute> {
	self.cx.tool_attrs(def_id, attr)
	}

	/// Get all tool attributes of a definition.
	pub(crate) fn all_tool_attrs(&self, def_id: DefId) -> Vec<Attribute> {
	self.cx.all_tool_attrs(def_id)
	}

	/// Returns printable, human readable form of `Span`.
	pub(crate) fn span_to_string(&self, span: Span) -> String {
	self.cx.span_to_string(span)
	}

	/// Return filename from given `Span`, for diagnostic purposes.
	pub(crate) fn get_filename(&self, span: &Span) -> Filename {
	self.cx.get_filename(span)
	}

	/// Return lines corresponding to this `Span`.
	pub(crate) fn get_lines(&self, span: &Span) -> LineInfo {
	self.cx.get_lines(span)
	}

	/// Returns the `kind` of given `DefId`.
	pub(crate) fn item_kind(&self, item: CrateItem) -> ItemKind {
	self.cx.item_kind(item)
	}

	/// Returns whether this is a foreign item.
	pub(crate) fn is_foreign_item(&self, item: DefId) -> bool {
	self.cx.is_foreign_item(item)
	}

	/// Returns the kind of a given foreign item.
	pub(crate) fn foreign_item_kind(&self, def: ForeignDef) -> ForeignItemKind {
	self.cx.foreign_item_kind(def)
	}

	/// Returns the kind of a given algebraic data type.
	pub(crate) fn adt_kind(&self, def: AdtDef) -> AdtKind {
	self.cx.adt_kind(def)
	}

	/// Returns if the ADT is a box.
	pub(crate) fn adt_is_box(&self, def: AdtDef) -> bool {
	self.cx.adt_is_box(def)
	}

	/// Returns whether this ADT is simd.
	pub(crate) fn adt_is_simd(&self, def: AdtDef) -> bool {
	self.cx.adt_is_simd(def)
	}

	/// Returns whether this definition is a C string.
	pub(crate) fn adt_is_cstr(&self, def: AdtDef) -> bool {
	self.cx.adt_is_cstr(def)
	}

	/// Retrieve the function signature for the given generic arguments.
	pub(crate) fn fn_sig(&self, def: FnDef, args: &GenericArgs) -> PolyFnSig {
	self.cx.fn_sig(def, args)
	}

	/// Retrieve the intrinsic definition if the item corresponds one.
	pub(crate) fn intrinsic(&self, item: DefId) -> Option<IntrinsicDef> {
	self.cx.intrinsic(item)
	}

	/// Retrieve the plain function name of an intrinsic.
	pub(crate) fn intrinsic_name(&self, def: IntrinsicDef) -> Symbol {
	self.cx.intrinsic_name(def)
	}

	/// Retrieve the closure signature for the given generic arguments.
	pub(crate) fn closure_sig(&self, args: &GenericArgs) -> PolyFnSig {
	self.cx.closure_sig(args)
	}

	/// The number of variants in this ADT.
	pub(crate) fn adt_variants_len(&self, def: AdtDef) -> usize {
	self.cx.adt_variants_len(def)
	}

	/// The name of a variant.
	pub(crate) fn variant_name(&self, def: VariantDef) -> Symbol {
	self.cx.variant_name(def)
	}

	pub(crate) fn variant_fields(&self, def: VariantDef) -> Vec<FieldDef> {
	self.cx.variant_fields(def)
	}

	/// Evaluate constant as a target usize.
	pub(crate) fn eval_target_usize(&self, cnst: &MirConst) -> Result<u64, Error> {
	self.cx.eval_target_usize(cnst)
	}

	pub(crate) fn eval_target_usize_ty(&self, cnst: &TyConst) -> Result<u64, Error> {
	self.cx.eval_target_usize_ty(cnst)
	}

	/// Create a new zero-sized constant.
	pub(crate) fn try_new_const_zst(&self, ty: Ty) -> Result<MirConst, Error> {
	self.cx.try_new_const_zst(ty)
	}

	/// Create a new constant that represents the given string value.
	pub(crate) fn new_const_str(&self, value: &str) -> MirConst {
	self.cx.new_const_str(value)
	}

	/// Create a new constant that represents the given boolean value.
	pub(crate) fn new_const_bool(&self, value: bool) -> MirConst {
	self.cx.new_const_bool(value)
	}

	/// Create a new constant that represents the given value.
	pub(crate) fn try_new_const_uint(
	&self,
	value: u128,
	uint_ty: UintTy,
	) -> Result<MirConst, Error> {
	self.cx.try_new_const_uint(value, uint_ty)
	}

	pub(crate) fn try_new_ty_const_uint(
	&self,
	value: u128,
	uint_ty: UintTy,
	) -> Result<TyConst, Error> {
	self.cx.try_new_ty_const_uint(value, uint_ty)
	}

	/// Create a new type from the given kind.
	pub(crate) fn new_rigid_ty(&self, kind: RigidTy) -> Ty {
	self.cx.new_rigid_ty(kind)
	}

	/// Create a new box type, `Box<T>`, for the given inner type `T`.
	pub(crate) fn new_box_ty(&self, ty: Ty) -> Ty {
	self.cx.new_box_ty(ty)
	}

	/// Returns the type of given crate item.
	pub(crate) fn def_ty(&self, item: DefId) -> Ty {
	self.cx.def_ty(item)
	}

	/// Returns the type of given definition instantiated with the given arguments.
	pub(crate) fn def_ty_with_args(&self, item: DefId, args: &GenericArgs) -> Ty {
	self.cx.def_ty_with_args(item, args)
	}

	/// Returns literal value of a const as a string.
	pub(crate) fn mir_const_pretty(&self, cnst: &MirConst) -> String {
	self.cx.mir_const_pretty(cnst)
	}

	/// `Span` of an item.
	pub(crate) fn span_of_an_item(&self, def_id: DefId) -> Span {
	self.cx.span_of_an_item(def_id)
	}

	pub(crate) fn ty_const_pretty(&self, ct: TyConstId) -> String {
	self.cx.ty_const_pretty(ct)
	}

	/// Obtain the representation of a type.
	pub(crate) fn ty_pretty(&self, ty: Ty) -> String {
	self.cx.ty_pretty(ty)
	}

	/// Obtain the representation of a type.
	pub(crate) fn ty_kind(&self, ty: Ty) -> TyKind {
	self.cx.ty_kind(ty)
	}

	/// Get the discriminant Ty for this Ty if there's one.
	pub(crate) fn rigid_ty_discriminant_ty(&self, ty: &RigidTy) -> Ty {
	self.cx.rigid_ty_discriminant_ty(ty)
	}

	/// Get the body of an Instance which is already monomorphized.
	pub(crate) fn instance_body(&self, instance: InstanceDef) -> Option<Body> {
	self.cx.instance_body(instance)
	}

	/// Get the instance type with generic instantiations applied and lifetimes erased.
	pub(crate) fn instance_ty(&self, instance: InstanceDef) -> Ty {
	self.cx.instance_ty(instance)
	}

	/// Get the instantiation types.
	pub(crate) fn instance_args(&self, def: InstanceDef) -> GenericArgs {
	self.cx.instance_args(def)
	}

	/// Get the instance.
	pub(crate) fn instance_def_id(&self, instance: InstanceDef) -> DefId {
	self.cx.instance_def_id(instance)
	}

	/// Get the instance mangled name.
	pub(crate) fn instance_mangled_name(&self, instance: InstanceDef) -> Symbol {
	self.cx.instance_mangled_name(instance)
	}

	/// Check if this is an empty DropGlue shim.
	pub(crate) fn is_empty_drop_shim(&self, def: InstanceDef) -> bool {
	self.cx.is_empty_drop_shim(def)
	}

	/// Convert a non-generic crate item into an instance.
	/// This function will panic if the item is generic.
	pub(crate) fn mono_instance(&self, def_id: DefId) -> Instance {
	self.cx.mono_instance(def_id)
	}

	/// Item requires monomorphization.
	pub(crate) fn requires_monomorphization(&self, def_id: DefId) -> bool {
	self.cx.requires_monomorphization(def_id)
	}

	/// Resolve an instance from the given function definition and generic arguments.
	pub(crate) fn resolve_instance(&self, def: FnDef, args: &GenericArgs) -> Option<Instance> {
	self.cx.resolve_instance(def, args)
	}

	/// Resolve an instance for drop_in_place for the given type.
	pub(crate) fn resolve_drop_in_place(&self, ty: Ty) -> Instance {
	self.cx.resolve_drop_in_place(ty)
	}

	/// Resolve instance for a function pointer.
	pub(crate) fn resolve_for_fn_ptr(&self, def: FnDef, args: &GenericArgs) -> Option<Instance> {
	self.cx.resolve_for_fn_ptr(def, args)
	}

	/// Resolve instance for a closure with the requested type.
	pub(crate) fn resolve_closure(
	&self,
	def: ClosureDef,
	args: &GenericArgs,
	kind: ClosureKind,
	) -> Option<Instance> {
	self.cx.resolve_closure(def, args, kind)
	}

	/// Evaluate a static's initializer.
	pub(crate) fn eval_static_initializer(&self, def: StaticDef) -> Result<Allocation, Error> {
	self.cx.eval_static_initializer(def)
	}

	/// Try to evaluate an instance into a constant.
	pub(crate) fn eval_instance(
	&self,
	def: InstanceDef,
	const_ty: Ty,
	) -> Result<Allocation, Error> {
	self.cx.eval_instance(def, const_ty)
	}

	/// Retrieve global allocation for the given allocation ID.
	pub(crate) fn global_alloc(&self, id: AllocId) -> GlobalAlloc {
	self.cx.global_alloc(id)
	}

	/// Retrieve the id for the virtual table.
	pub(crate) fn vtable_allocation(&self, global_alloc: &GlobalAlloc) -> Option<AllocId> {
	self.cx.vtable_allocation(global_alloc)
	}

	pub(crate) fn krate(&self, def_id: DefId) -> Crate {
	self.cx.krate(def_id)
	}

	pub(crate) fn instance_name(&self, def: InstanceDef, trimmed: bool) -> Symbol {
	self.cx.instance_name(def, trimmed)
	}

	/// Return information about the target machine.
	pub(crate) fn target_info(&self) -> MachineInfo {
	self.cx.target_info()
	}

	/// Get an instance ABI.
	pub(crate) fn instance_abi(&self, def: InstanceDef) -> Result<FnAbi, Error> {
	self.cx.instance_abi(def)
	}

	/// Get the ABI of a function pointer.
	pub(crate) fn fn_ptr_abi(&self, fn_ptr: PolyFnSig) -> Result<FnAbi, Error> {
	self.cx.fn_ptr_abi(fn_ptr)
	}

	/// Get the layout of a type.
	pub(crate) fn ty_layout(&self, ty: Ty) -> Result<Layout, Error> {
	self.cx.ty_layout(ty)
	}

	/// Get the layout shape.
	pub(crate) fn layout_shape(&self, id: Layout) -> LayoutShape {
	self.cx.layout_shape(id)
	}

	/// Get a debug string representation of a place.
	pub(crate) fn place_pretty(&self, place: &Place) -> String {
	self.cx.place_pretty(place)
	}

	/// Get the resulting type of binary operation.
	pub(crate) fn binop_ty(&self, bin_op: BinOp, rhs: Ty, lhs: Ty) -> Ty {
	self.cx.binop_ty(bin_op, rhs, lhs)
	}

	/// Get the resulting type of unary operation.
	pub(crate) fn unop_ty(&self, un_op: UnOp, arg: Ty) -> Ty {
	self.cx.unop_ty(un_op, arg)
	}

	/// Get all associated items of a definition.
	pub(crate) fn associated_items(&self, def_id: DefId) -> AssocItems {
	self.cx.associated_items(def_id)
	}
	}

	// A thread local variable that stores a pointer to [`SmirInterface`].
	scoped_tls::scoped_thread_local!(static TLV: Cell<*const ()>);

	pub(crate) fn run<'tcx, T, F>(interface: &SmirInterface<'tcx>, f: F) -> Result<T, Error>
	where
	F: FnOnce() -> T,
	{
	if TLV.is_set() {
	Err(Error::from("StableMIR already running"))
	} else {
	let ptr: const () = (interface as const SmirInterface<'tcx>) as *const ();
	TLV.set(&Cell::new(ptr), \|\| Ok(f()))
	}
	}

	/// Execute the given function with access the [`SmirInterface`].
	///
	/// I.e., This function will load the current interface and calls a function with it.
	/// Do not nest these, as that will ICE.
	pub(crate) fn with<R>(f: impl FnOnce(&SmirInterface<'_>) -> R) -> R {
	assert!(TLV.is_set());
	TLV.with(\|tlv\| {
	let ptr = tlv.get();
	assert!(!ptr.is_null());
	f(unsafe { &(ptr as const SmirInterface<'_>) })
	})
	}