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Rollup merge of #99821 - cjgillot:ast-lifetimes-2, r=compiler-errors

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Remove separate indexing of early-bound regions

~Based on https://github.com/rust-lang/rust/pull/99728.~

This PR copies some modifications from https://github.com/rust-lang/rust/pull/97839 around object lifetime defaults.
These modifications allow to stop counting generic parameters during lifetime resolution, and rely on the indexing given by `rustc_typeck::collect`.
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Dylan DPC 2022-08-29 16:49:39 +05:30 • committed by GitHub
commit 5555e13a6e
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17 changed files with 180 additions and 432 deletions
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1
compiler/rustc_metadata/src/rmeta/decoder/cstore_impl.rs
View file

@ -199,6 +199,7 @@ provide! { tcx, def_id, other, cdata,
codegen_fn_attrs => { table }
impl_trait_ref => { table }
const_param_default => { table }
object_lifetime_default => { table }
thir_abstract_const => { table }
optimized_mir => { table }
mir_for_ctfe => { table }

5
compiler/rustc_metadata/src/rmeta/encoder.rs
View file

@ -1076,6 +1076,11 @@ impl<'a, 'tcx> EncodeContext<'a, 'tcx> {
record_array!(self.tables.inferred_outlives_of[def_id] <- inferred_outlives);
}
}
if let DefKind::TyParam | DefKind::ConstParam = def_kind {
if let Some(default) = self.tcx.object_lifetime_default(def_id) {
record!(self.tables.object_lifetime_default[def_id] <- default);
}
}
if let DefKind::Trait | DefKind::TraitAlias = def_kind {
record!(self.tables.super_predicates_of[def_id] <- self.tcx.super_predicates_of(def_id));
}

2
compiler/rustc_metadata/src/rmeta/mod.rs
View file

@ -16,6 +16,7 @@ use rustc_index::{bit_set::FiniteBitSet, vec::IndexVec};
use rustc_middle::metadata::ModChild;
use rustc_middle::middle::codegen_fn_attrs::CodegenFnAttrs;
use rustc_middle::middle::exported_symbols::{ExportedSymbol, SymbolExportInfo};
use rustc_middle::middle::resolve_lifetime::ObjectLifetimeDefault;
use rustc_middle::mir;
use rustc_middle::ty::fast_reject::SimplifiedType;
use rustc_middle::ty::query::Providers;
@ -358,6 +359,7 @@ define_tables! {
codegen_fn_attrs: Table<DefIndex, LazyValue<CodegenFnAttrs>>,
impl_trait_ref: Table<DefIndex, LazyValue<ty::TraitRef<'static>>>,
const_param_default: Table<DefIndex, LazyValue<rustc_middle::ty::Const<'static>>>,
object_lifetime_default: Table<DefIndex, LazyValue<ObjectLifetimeDefault>>,
optimized_mir: Table<DefIndex, LazyValue<mir::Body<'static>>>,
mir_for_ctfe: Table<DefIndex, LazyValue<mir::Body<'static>>>,
promoted_mir: Table<DefIndex, LazyValue<IndexVec<mir::Promoted, mir::Body<'static>>>>,