diff options
Diffstat (limited to 'compiler/rustc_middle/src')
| -rw-r--r-- | compiler/rustc_middle/src/hooks/mod.rs | 4 | ||||
| -rw-r--r-- | compiler/rustc_middle/src/middle/codegen_fn_attrs.rs | 1 | ||||
| -rw-r--r-- | compiler/rustc_middle/src/mir/consts.rs | 63 | ||||
| -rw-r--r-- | compiler/rustc_middle/src/mir/interpret/error.rs | 2 | ||||
| -rw-r--r-- | compiler/rustc_middle/src/mir/mono.rs | 6 | ||||
| -rw-r--r-- | compiler/rustc_middle/src/mir/pretty.rs | 18 | ||||
| -rw-r--r-- | compiler/rustc_middle/src/mir/query.rs | 2 | ||||
| -rw-r--r-- | compiler/rustc_middle/src/query/erase.rs | 6 | ||||
| -rw-r--r-- | compiler/rustc_middle/src/query/mod.rs | 8 | ||||
| -rw-r--r-- | compiler/rustc_middle/src/ty/context.rs | 31 | ||||
| -rw-r--r-- | compiler/rustc_middle/src/ty/inhabitedness/mod.rs | 16 | ||||
| -rw-r--r-- | compiler/rustc_middle/src/ty/print/pretty.rs | 26 | ||||
| -rw-r--r-- | compiler/rustc_middle/src/ty/structural_impls.rs | 11 |
13 files changed, 87 insertions, 107 deletions
diff --git a/compiler/rustc_middle/src/hooks/mod.rs b/compiler/rustc_middle/src/hooks/mod.rs index c5ce6efcb81..9d2f0a45237 100644 --- a/compiler/rustc_middle/src/hooks/mod.rs +++ b/compiler/rustc_middle/src/hooks/mod.rs @@ -50,10 +50,10 @@ macro_rules! declare_hooks { declare_hooks! { /// Tries to destructure an `mir::Const` ADT or array into its variant index /// and its field values. This should only be used for pretty printing. - hook try_destructure_mir_constant_for_user_output(val: mir::ConstValue<'tcx>, ty: Ty<'tcx>) -> Option<mir::DestructuredConstant<'tcx>>; + hook try_destructure_mir_constant_for_user_output(val: mir::ConstValue, ty: Ty<'tcx>) -> Option<mir::DestructuredConstant<'tcx>>; /// Getting a &core::panic::Location referring to a span. - hook const_caller_location(file: rustc_span::Symbol, line: u32, col: u32) -> mir::ConstValue<'tcx>; + hook const_caller_location(file: rustc_span::Symbol, line: u32, col: u32) -> mir::ConstValue; /// Returns `true` if this def is a function-like thing that is eligible for /// coverage instrumentation under `-Cinstrument-coverage`. diff --git a/compiler/rustc_middle/src/middle/codegen_fn_attrs.rs b/compiler/rustc_middle/src/middle/codegen_fn_attrs.rs index 6eae3b51e29..34a29acdc85 100644 --- a/compiler/rustc_middle/src/middle/codegen_fn_attrs.rs +++ b/compiler/rustc_middle/src/middle/codegen_fn_attrs.rs @@ -70,6 +70,7 @@ pub struct CodegenFnAttrs { /// switching between multiple instruction sets. pub instruction_set: Option<InstructionSetAttr>, /// The `#[align(...)]` attribute. Determines the alignment of the function body. + // FIXME(#82232, #143834): temporarily renamed to mitigate `#[align]` nameres ambiguity pub alignment: Option<Align>, /// The `#[patchable_function_entry(...)]` attribute. Indicates how many nops should be around /// the function entry. diff --git a/compiler/rustc_middle/src/mir/consts.rs b/compiler/rustc_middle/src/mir/consts.rs index fb941977528..96131d47a17 100644 --- a/compiler/rustc_middle/src/mir/consts.rs +++ b/compiler/rustc_middle/src/mir/consts.rs @@ -9,9 +9,7 @@ use rustc_span::{DUMMY_SP, Span, Symbol}; use rustc_type_ir::TypeVisitableExt; use super::interpret::ReportedErrorInfo; -use crate::mir::interpret::{ - AllocId, AllocRange, ConstAllocation, ErrorHandled, GlobalAlloc, Scalar, alloc_range, -}; +use crate::mir::interpret::{AllocId, AllocRange, ErrorHandled, GlobalAlloc, Scalar, alloc_range}; use crate::mir::{Promoted, pretty_print_const_value}; use crate::ty::print::{pretty_print_const, with_no_trimmed_paths}; use crate::ty::{self, ConstKind, GenericArgsRef, ScalarInt, Ty, TyCtxt}; @@ -33,8 +31,8 @@ pub struct ConstAlloc<'tcx> { /// Represents a constant value in Rust. `Scalar` and `Slice` are optimizations for /// array length computations, enum discriminants and the pattern matching logic. #[derive(Copy, Clone, Debug, Eq, PartialEq, TyEncodable, TyDecodable, Hash)] -#[derive(HashStable, Lift)] -pub enum ConstValue<'tcx> { +#[derive(HashStable)] +pub enum ConstValue { /// Used for types with `layout::abi::Scalar` ABI. /// /// Not using the enum `Value` to encode that this must not be `Uninit`. @@ -52,7 +50,7 @@ pub enum ConstValue<'tcx> { Slice { /// The allocation storing the slice contents. /// This always points to the beginning of the allocation. - data: ConstAllocation<'tcx>, + alloc_id: AllocId, /// The metadata field of the reference. /// This is a "target usize", so we use `u64` as in the interpreter. meta: u64, @@ -75,9 +73,9 @@ pub enum ConstValue<'tcx> { } #[cfg(target_pointer_width = "64")] -rustc_data_structures::static_assert_size!(ConstValue<'_>, 24); +rustc_data_structures::static_assert_size!(ConstValue, 24); -impl<'tcx> ConstValue<'tcx> { +impl ConstValue { #[inline] pub fn try_to_scalar(&self) -> Option<Scalar> { match *self { @@ -98,11 +96,11 @@ impl<'tcx> ConstValue<'tcx> { self.try_to_scalar_int()?.try_into().ok() } - pub fn try_to_target_usize(&self, tcx: TyCtxt<'tcx>) -> Option<u64> { + pub fn try_to_target_usize(&self, tcx: TyCtxt<'_>) -> Option<u64> { Some(self.try_to_scalar_int()?.to_target_usize(tcx)) } - pub fn try_to_bits_for_ty( + pub fn try_to_bits_for_ty<'tcx>( &self, tcx: TyCtxt<'tcx>, typing_env: ty::TypingEnv<'tcx>, @@ -132,12 +130,15 @@ impl<'tcx> ConstValue<'tcx> { } /// Must only be called on constants of type `&str` or `&[u8]`! - pub fn try_get_slice_bytes_for_diagnostics(&self, tcx: TyCtxt<'tcx>) -> Option<&'tcx [u8]> { - let (data, start, end) = match self { + pub fn try_get_slice_bytes_for_diagnostics<'tcx>( + &self, + tcx: TyCtxt<'tcx>, + ) -> Option<&'tcx [u8]> { + let (alloc_id, start, len) = match self { ConstValue::Scalar(_) | ConstValue::ZeroSized => { bug!("`try_get_slice_bytes` on non-slice constant") } - &ConstValue::Slice { data, meta } => (data, 0, meta), + &ConstValue::Slice { alloc_id, meta } => (alloc_id, 0, meta), &ConstValue::Indirect { alloc_id, offset } => { // The reference itself is stored behind an indirection. // Load the reference, and then load the actual slice contents. @@ -170,26 +171,29 @@ impl<'tcx> ConstValue<'tcx> { // Non-empty slice, must have memory. We know this is a relative pointer. let (inner_prov, offset) = ptr.into_pointer_or_addr().ok()?.prov_and_relative_offset(); - let data = tcx.global_alloc(inner_prov.alloc_id()).unwrap_memory(); - (data, offset.bytes(), offset.bytes() + len) + (inner_prov.alloc_id(), offset.bytes(), len) } }; + let data = tcx.global_alloc(alloc_id).unwrap_memory(); + // This is for diagnostics only, so we are okay to use `inspect_with_uninit_and_ptr_outside_interpreter`. let start = start.try_into().unwrap(); - let end = end.try_into().unwrap(); + let end = start + usize::try_from(len).unwrap(); Some(data.inner().inspect_with_uninit_and_ptr_outside_interpreter(start..end)) } /// Check if a constant may contain provenance information. This is used by MIR opts. /// Can return `true` even if there is no provenance. - pub fn may_have_provenance(&self, tcx: TyCtxt<'tcx>, size: Size) -> bool { + pub fn may_have_provenance(&self, tcx: TyCtxt<'_>, size: Size) -> bool { match *self { ConstValue::ZeroSized | ConstValue::Scalar(Scalar::Int(_)) => return false, ConstValue::Scalar(Scalar::Ptr(..)) => return true, // It's hard to find out the part of the allocation we point to; // just conservatively check everything. - ConstValue::Slice { data, meta: _ } => !data.inner().provenance().ptrs().is_empty(), + ConstValue::Slice { alloc_id, meta: _ } => { + !tcx.global_alloc(alloc_id).unwrap_memory().inner().provenance().ptrs().is_empty() + } ConstValue::Indirect { alloc_id, offset } => !tcx .global_alloc(alloc_id) .unwrap_memory() @@ -200,7 +204,7 @@ impl<'tcx> ConstValue<'tcx> { } /// Check if a constant only contains uninitialized bytes. - pub fn all_bytes_uninit(&self, tcx: TyCtxt<'tcx>) -> bool { + pub fn all_bytes_uninit(&self, tcx: TyCtxt<'_>) -> bool { let ConstValue::Indirect { alloc_id, .. } = self else { return false; }; @@ -247,7 +251,7 @@ pub enum Const<'tcx> { /// This constant cannot go back into the type system, as it represents /// something the type system cannot handle (e.g. pointers). - Val(ConstValue<'tcx>, Ty<'tcx>), + Val(ConstValue, Ty<'tcx>), } impl<'tcx> Const<'tcx> { @@ -343,7 +347,7 @@ impl<'tcx> Const<'tcx> { tcx: TyCtxt<'tcx>, typing_env: ty::TypingEnv<'tcx>, span: Span, - ) -> Result<ConstValue<'tcx>, ErrorHandled> { + ) -> Result<ConstValue, ErrorHandled> { match self { Const::Ty(_, c) => { if c.has_non_region_param() { @@ -440,7 +444,7 @@ impl<'tcx> Const<'tcx> { } #[inline] - pub fn from_value(val: ConstValue<'tcx>, ty: Ty<'tcx>) -> Self { + pub fn from_value(val: ConstValue, ty: Ty<'tcx>) -> Self { Self::Val(val, ty) } @@ -487,9 +491,8 @@ impl<'tcx> Const<'tcx> { /// taking into account even pointer identity tests. pub fn is_deterministic(&self) -> bool { // Some constants may generate fresh allocations for pointers they contain, - // so using the same constant twice can yield two different results: - // - valtrees purposefully generate new allocations - // - ConstValue::Slice also generate new allocations + // so using the same constant twice can yield two different results. + // Notably, valtrees purposefully generate new allocations. match self { Const::Ty(_, c) => match c.kind() { ty::ConstKind::Param(..) => true, @@ -507,11 +510,11 @@ impl<'tcx> Const<'tcx> { | ty::ConstKind::Placeholder(..) => bug!(), }, Const::Unevaluated(..) => false, - // If the same slice appears twice in the MIR, we cannot guarantee that we will - // give the same `AllocId` to the data. - Const::Val(ConstValue::Slice { .. }, _) => false, Const::Val( - ConstValue::ZeroSized | ConstValue::Scalar(_) | ConstValue::Indirect { .. }, + ConstValue::Slice { .. } + | ConstValue::ZeroSized + | ConstValue::Scalar(_) + | ConstValue::Indirect { .. }, _, ) => true, } @@ -574,7 +577,7 @@ impl<'tcx> Display for Const<'tcx> { /// Const-related utilities impl<'tcx> TyCtxt<'tcx> { - pub fn span_as_caller_location(self, span: Span) -> ConstValue<'tcx> { + pub fn span_as_caller_location(self, span: Span) -> ConstValue { let topmost = span.ctxt().outer_expn().expansion_cause().unwrap_or(span); let caller = self.sess.source_map().lookup_char_pos(topmost.lo()); self.const_caller_location( diff --git a/compiler/rustc_middle/src/mir/interpret/error.rs b/compiler/rustc_middle/src/mir/interpret/error.rs index 3e68afbfabd..2b0cfb86564 100644 --- a/compiler/rustc_middle/src/mir/interpret/error.rs +++ b/compiler/rustc_middle/src/mir/interpret/error.rs @@ -137,7 +137,7 @@ impl<'tcx> ValTreeCreationError<'tcx> { pub type EvalToAllocationRawResult<'tcx> = Result<ConstAlloc<'tcx>, ErrorHandled>; pub type EvalStaticInitializerRawResult<'tcx> = Result<ConstAllocation<'tcx>, ErrorHandled>; -pub type EvalToConstValueResult<'tcx> = Result<ConstValue<'tcx>, ErrorHandled>; +pub type EvalToConstValueResult<'tcx> = Result<ConstValue, ErrorHandled>; pub type EvalToValTreeResult<'tcx> = Result<ValTree<'tcx>, ValTreeCreationError<'tcx>>; #[cfg(target_pointer_width = "64")] diff --git a/compiler/rustc_middle/src/mir/mono.rs b/compiler/rustc_middle/src/mir/mono.rs index 2d7ddd105bd..105736b9e24 100644 --- a/compiler/rustc_middle/src/mir/mono.rs +++ b/compiler/rustc_middle/src/mir/mono.rs @@ -143,10 +143,8 @@ impl<'tcx> MonoItem<'tcx> { }; // Similarly, the executable entrypoint must be instantiated exactly once. - if let Some((entry_def_id, _)) = tcx.entry_fn(()) { - if instance.def_id() == entry_def_id { - return InstantiationMode::GloballyShared { may_conflict: false }; - } + if tcx.is_entrypoint(instance.def_id()) { + return InstantiationMode::GloballyShared { may_conflict: false }; } // If the function is #[naked] or contains any other attribute that requires exactly-once diff --git a/compiler/rustc_middle/src/mir/pretty.rs b/compiler/rustc_middle/src/mir/pretty.rs index 8e403dfddae..809cdb329f7 100644 --- a/compiler/rustc_middle/src/mir/pretty.rs +++ b/compiler/rustc_middle/src/mir/pretty.rs @@ -1465,7 +1465,7 @@ impl<'tcx> Visitor<'tcx> for ExtraComments<'tcx> { self.push(&format!("+ user_ty: {user_ty:?}")); } - let fmt_val = |val: ConstValue<'tcx>, ty: Ty<'tcx>| { + let fmt_val = |val: ConstValue, ty: Ty<'tcx>| { let tcx = self.tcx; rustc_data_structures::make_display(move |fmt| { pretty_print_const_value_tcx(tcx, val, ty, fmt) @@ -1562,16 +1562,12 @@ pub fn write_allocations<'tcx>( alloc.inner().provenance().ptrs().values().map(|p| p.alloc_id()) } - fn alloc_id_from_const_val(val: ConstValue<'_>) -> Option<AllocId> { + fn alloc_id_from_const_val(val: ConstValue) -> Option<AllocId> { match val { ConstValue::Scalar(interpret::Scalar::Ptr(ptr, _)) => Some(ptr.provenance.alloc_id()), ConstValue::Scalar(interpret::Scalar::Int { .. }) => None, ConstValue::ZeroSized => None, - ConstValue::Slice { .. } => { - // `u8`/`str` slices, shouldn't contain pointers that we want to print. - None - } - ConstValue::Indirect { alloc_id, .. } => { + ConstValue::Slice { alloc_id, .. } | ConstValue::Indirect { alloc_id, .. } => { // FIXME: we don't actually want to print all of these, since some are printed nicely directly as values inline in MIR. // Really we'd want `pretty_print_const_value` to decide which allocations to print, instead of having a separate visitor. Some(alloc_id) @@ -1885,7 +1881,7 @@ fn pretty_print_byte_str(fmt: &mut Formatter<'_>, byte_str: &[u8]) -> fmt::Resul fn comma_sep<'tcx>( tcx: TyCtxt<'tcx>, fmt: &mut Formatter<'_>, - elems: Vec<(ConstValue<'tcx>, Ty<'tcx>)>, + elems: Vec<(ConstValue, Ty<'tcx>)>, ) -> fmt::Result { let mut first = true; for (ct, ty) in elems { @@ -1900,7 +1896,7 @@ fn comma_sep<'tcx>( fn pretty_print_const_value_tcx<'tcx>( tcx: TyCtxt<'tcx>, - ct: ConstValue<'tcx>, + ct: ConstValue, ty: Ty<'tcx>, fmt: &mut Formatter<'_>, ) -> fmt::Result { @@ -1947,7 +1943,7 @@ fn pretty_print_const_value_tcx<'tcx>( let ct = tcx.lift(ct).unwrap(); let ty = tcx.lift(ty).unwrap(); if let Some(contents) = tcx.try_destructure_mir_constant_for_user_output(ct, ty) { - let fields: Vec<(ConstValue<'_>, Ty<'_>)> = contents.fields.to_vec(); + let fields: Vec<(ConstValue, Ty<'_>)> = contents.fields.to_vec(); match *ty.kind() { ty::Array(..) => { fmt.write_str("[")?; @@ -2028,7 +2024,7 @@ fn pretty_print_const_value_tcx<'tcx>( } pub(crate) fn pretty_print_const_value<'tcx>( - ct: ConstValue<'tcx>, + ct: ConstValue, ty: Ty<'tcx>, fmt: &mut Formatter<'_>, ) -> fmt::Result { diff --git a/compiler/rustc_middle/src/mir/query.rs b/compiler/rustc_middle/src/mir/query.rs index 3fc05f2caf2..a8a95c699d8 100644 --- a/compiler/rustc_middle/src/mir/query.rs +++ b/compiler/rustc_middle/src/mir/query.rs @@ -173,5 +173,5 @@ pub enum AnnotationSource { #[derive(Copy, Clone, Debug, HashStable)] pub struct DestructuredConstant<'tcx> { pub variant: Option<VariantIdx>, - pub fields: &'tcx [(ConstValue<'tcx>, Ty<'tcx>)], + pub fields: &'tcx [(ConstValue, Ty<'tcx>)], } diff --git a/compiler/rustc_middle/src/query/erase.rs b/compiler/rustc_middle/src/query/erase.rs index f138c5ca039..dab5900b4ab 100644 --- a/compiler/rustc_middle/src/query/erase.rs +++ b/compiler/rustc_middle/src/query/erase.rs @@ -153,8 +153,8 @@ impl EraseType for Result<mir::ConstAlloc<'_>, mir::interpret::ErrorHandled> { type Result = [u8; size_of::<Result<mir::ConstAlloc<'static>, mir::interpret::ErrorHandled>>()]; } -impl EraseType for Result<mir::ConstValue<'_>, mir::interpret::ErrorHandled> { - type Result = [u8; size_of::<Result<mir::ConstValue<'static>, mir::interpret::ErrorHandled>>()]; +impl EraseType for Result<mir::ConstValue, mir::interpret::ErrorHandled> { + type Result = [u8; size_of::<Result<mir::ConstValue, mir::interpret::ErrorHandled>>()]; } impl EraseType for EvalToValTreeResult<'_> { @@ -301,6 +301,7 @@ trivial! { rustc_middle::middle::resolve_bound_vars::ResolvedArg, rustc_middle::middle::stability::DeprecationEntry, rustc_middle::mir::ConstQualifs, + rustc_middle::mir::ConstValue, rustc_middle::mir::interpret::AllocId, rustc_middle::mir::interpret::CtfeProvenance, rustc_middle::mir::interpret::ErrorHandled, @@ -362,7 +363,6 @@ tcx_lifetime! { rustc_middle::mir::Const, rustc_middle::mir::DestructuredConstant, rustc_middle::mir::ConstAlloc, - rustc_middle::mir::ConstValue, rustc_middle::mir::interpret::GlobalId, rustc_middle::mir::interpret::LitToConstInput, rustc_middle::mir::interpret::EvalStaticInitializerRawResult, diff --git a/compiler/rustc_middle/src/query/mod.rs b/compiler/rustc_middle/src/query/mod.rs index ae8c8259be4..b0d579a546f 100644 --- a/compiler/rustc_middle/src/query/mod.rs +++ b/compiler/rustc_middle/src/query/mod.rs @@ -1363,7 +1363,7 @@ rustc_queries! { } /// Converts a type-level constant value into a MIR constant value. - query valtree_to_const_val(key: ty::Value<'tcx>) -> mir::ConstValue<'tcx> { + query valtree_to_const_val(key: ty::Value<'tcx>) -> mir::ConstValue { desc { "converting type-level constant value to MIR constant value"} } @@ -2152,9 +2152,6 @@ rustc_queries! { desc { |tcx| "collecting child items of module `{}`", tcx.def_path_str(def_id) } separate_provide_extern } - query extern_mod_stmt_cnum(def_id: LocalDefId) -> Option<CrateNum> { - desc { |tcx| "computing crate imported by `{}`", tcx.def_path_str(def_id) } - } /// Gets the number of definitions in a foreign crate. /// @@ -2285,9 +2282,6 @@ rustc_queries! { query upvars_mentioned(def_id: DefId) -> Option<&'tcx FxIndexMap<hir::HirId, hir::Upvar>> { desc { |tcx| "collecting upvars mentioned in `{}`", tcx.def_path_str(def_id) } } - query maybe_unused_trait_imports(_: ()) -> &'tcx FxIndexSet<LocalDefId> { - desc { "fetching potentially unused trait imports" } - } /// All available crates in the graph, including those that should not be user-facing /// (such as private crates). diff --git a/compiler/rustc_middle/src/ty/context.rs b/compiler/rustc_middle/src/ty/context.rs index 7e6bcfee025..66d1335e763 100644 --- a/compiler/rustc_middle/src/ty/context.rs +++ b/compiler/rustc_middle/src/ty/context.rs @@ -5,7 +5,7 @@ pub mod tls; use std::assert_matches::debug_assert_matches; -use std::borrow::Borrow; +use std::borrow::{Borrow, Cow}; use std::cmp::Ordering; use std::env::VarError; use std::ffi::OsStr; @@ -1625,7 +1625,11 @@ impl<'tcx> TyCtxt<'tcx> { /// Allocates a read-only byte or string literal for `mir::interpret` with alignment 1. /// Returns the same `AllocId` if called again with the same bytes. - pub fn allocate_bytes_dedup(self, bytes: &[u8], salt: usize) -> interpret::AllocId { + pub fn allocate_bytes_dedup<'a>( + self, + bytes: impl Into<Cow<'a, [u8]>>, + salt: usize, + ) -> interpret::AllocId { // Create an allocation that just contains these bytes. let alloc = interpret::Allocation::from_bytes_byte_aligned_immutable(bytes, ()); let alloc = self.mk_const_alloc(alloc); @@ -3373,6 +3377,11 @@ impl<'tcx> TyCtxt<'tcx> { self.resolutions(()).module_children.get(&def_id).map_or(&[], |v| &v[..]) } + /// Return the crate imported by given use item. + pub fn extern_mod_stmt_cnum(self, def_id: LocalDefId) -> Option<CrateNum> { + self.resolutions(()).extern_crate_map.get(&def_id).copied() + } + pub fn resolver_for_lowering(self) -> &'tcx Steal<(ty::ResolverAstLowering, Arc<ast::Crate>)> { self.resolver_for_lowering_raw(()).0 } @@ -3410,6 +3419,20 @@ impl<'tcx> TyCtxt<'tcx> { pub fn do_not_recommend_impl(self, def_id: DefId) -> bool { self.get_diagnostic_attr(def_id, sym::do_not_recommend).is_some() } + + /// Whether this def is one of the special bin crate entrypoint functions that must have a + /// monomorphization and also not be internalized in the bin crate. + pub fn is_entrypoint(self, def_id: DefId) -> bool { + if self.is_lang_item(def_id, LangItem::Start) { + return true; + } + if let Some((entry_def_id, _)) = self.entry_fn(()) + && entry_def_id == def_id + { + return true; + } + false + } } /// Parameter attributes that can only be determined by examining the body of a function instead @@ -3428,10 +3451,6 @@ pub struct DeducedParamAttrs { } pub fn provide(providers: &mut Providers) { - providers.maybe_unused_trait_imports = - |tcx, ()| &tcx.resolutions(()).maybe_unused_trait_imports; - providers.extern_mod_stmt_cnum = - |tcx, id| tcx.resolutions(()).extern_crate_map.get(&id).cloned(); providers.is_panic_runtime = |tcx, LocalCrate| contains_name(tcx.hir_krate_attrs(), sym::panic_runtime); providers.is_compiler_builtins = diff --git a/compiler/rustc_middle/src/ty/inhabitedness/mod.rs b/compiler/rustc_middle/src/ty/inhabitedness/mod.rs index 2a336cc21f4..7eb74b52b44 100644 --- a/compiler/rustc_middle/src/ty/inhabitedness/mod.rs +++ b/compiler/rustc_middle/src/ty/inhabitedness/mod.rs @@ -43,7 +43,6 @@ //! This code should only compile in modules where the uninhabitedness of `Foo` //! is visible. -use rustc_span::sym; use rustc_type_ir::TyKind::*; use tracing::instrument; @@ -85,21 +84,6 @@ impl<'tcx> VariantDef { InhabitedPredicate::all( tcx, self.fields.iter().map(|field| { - // Unstable fields are always considered to be inhabited. In the future, - // this could be extended to be conditional on the field being unstable - // only within the module that's querying the inhabitedness, like: - // `let pred = pred.or(InhabitedPredicate::IsUnstable(field.did));` - // but this is unnecessary for now, since it would only affect nightly-only - // code or code within the standard library itself. - // HACK: We filter out `rustc_private` fields since with the flag - // `-Zforce-unstable-if-unmarked` we consider all unmarked fields to be - // unstable when building the compiler. - if tcx - .lookup_stability(field.did) - .is_some_and(|stab| stab.is_unstable() && stab.feature != sym::rustc_private) - { - return InhabitedPredicate::True; - } let pred = tcx.type_of(field.did).instantiate_identity().inhabited_predicate(tcx); if adt.is_enum() { return pred; diff --git a/compiler/rustc_middle/src/ty/print/pretty.rs b/compiler/rustc_middle/src/ty/print/pretty.rs index 2eb530f328d..9ee64df0ad0 100644 --- a/compiler/rustc_middle/src/ty/print/pretty.rs +++ b/compiler/rustc_middle/src/ty/print/pretty.rs @@ -1210,30 +1210,6 @@ pub trait PrettyPrinter<'tcx>: Printer<'tcx> + fmt::Write { } for (assoc_item_def_id, term) in assoc_items { - // Skip printing `<{coroutine@} as Coroutine<_>>::Return` from async blocks, - // unless we can find out what coroutine return type it comes from. - let term = if let Some(ty) = term.skip_binder().as_type() - && let ty::Alias(ty::Projection, proj) = ty.kind() - && let Some(assoc) = tcx.opt_associated_item(proj.def_id) - && assoc - .trait_container(tcx) - .is_some_and(|def_id| tcx.is_lang_item(def_id, LangItem::Coroutine)) - && assoc.opt_name() == Some(rustc_span::sym::Return) - { - if let ty::Coroutine(_, args) = args.type_at(0).kind() { - let return_ty = args.as_coroutine().return_ty(); - if !return_ty.is_ty_var() { - return_ty.into() - } else { - continue; - } - } else { - continue; - } - } else { - term.skip_binder() - }; - if first { p!("<"); first = false; @@ -1243,7 +1219,7 @@ pub trait PrettyPrinter<'tcx>: Printer<'tcx> + fmt::Write { p!(write("{} = ", tcx.associated_item(assoc_item_def_id).name())); - match term.kind() { + match term.skip_binder().kind() { TermKind::Ty(ty) => p!(print(ty)), TermKind::Const(c) => p!(print(c)), }; diff --git a/compiler/rustc_middle/src/ty/structural_impls.rs b/compiler/rustc_middle/src/ty/structural_impls.rs index ab31d943408..a5fdce93e4b 100644 --- a/compiler/rustc_middle/src/ty/structural_impls.rs +++ b/compiler/rustc_middle/src/ty/structural_impls.rs @@ -4,6 +4,7 @@ //! to help with the tedium. use std::fmt::{self, Debug}; +use std::marker::PhantomData; use rustc_abi::TyAndLayout; use rustc_hir::def::Namespace; @@ -234,6 +235,7 @@ TrivialLiftImpls! { rustc_abi::ExternAbi, rustc_abi::Size, rustc_hir::Safety, + rustc_middle::mir::ConstValue, rustc_type_ir::BoundConstness, rustc_type_ir::PredicatePolarity, // tidy-alphabetical-end @@ -250,7 +252,7 @@ TrivialTypeTraversalImpls! { crate::mir::BlockTailInfo, crate::mir::BorrowKind, crate::mir::CastKind, - crate::mir::ConstValue<'tcx>, + crate::mir::ConstValue, crate::mir::CoroutineSavedLocal, crate::mir::FakeReadCause, crate::mir::Local, @@ -311,6 +313,13 @@ TrivialTypeTraversalAndLiftImpls! { /////////////////////////////////////////////////////////////////////////// // Lift implementations +impl<'tcx> Lift<TyCtxt<'tcx>> for PhantomData<&()> { + type Lifted = PhantomData<&'tcx ()>; + fn lift_to_interner(self, _: TyCtxt<'tcx>) -> Option<Self::Lifted> { + Some(PhantomData) + } +} + impl<'tcx, T: Lift<TyCtxt<'tcx>>> Lift<TyCtxt<'tcx>> for Option<T> { type Lifted = Option<T::Lifted>; fn lift_to_interner(self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> { |