Auto merge of #157100 - oli-obk:some_more_per_owner_things, r=<try>

Some more per owner things

compiler/rustc_ast_lowering/src/expr.rs

@@ -1549,7 +1549,7 @@ fn lower_label(
     fn lower_loop_destination(&mut self, destination: Option<(NodeId, Label)>) -> hir::Destination {
         let target_id = match destination {
             Some((id, _)) => {
-                if let Some(loop_id) = self.resolver.get_label_res(id) {
+                if let Some(loop_id) = self.owner.get_label_res(id) {
                     let local_id = self.ident_and_label_to_local_id[&loop_id];
                     let loop_hir_id = HirId { owner: self.current_hir_id_owner, local_id };
                     Ok(loop_hir_id)

compiler/rustc_ast_lowering/src/lib.rs

@@ -293,16 +293,6 @@ fn get_import_res(&self, id: NodeId) -> PerNS<Option<Res<NodeId>>> {
         self.import_res_map.get(&id).copied().unwrap_or_default()
     }
 
-    /// Obtains resolution for a label with the given `NodeId`.
-    fn get_label_res(&self, id: NodeId) -> Option<NodeId> {
-        self.label_res_map.get(&id).copied()
-    }
-
-    /// Obtains resolution for a lifetime with the given `NodeId`.
-    fn get_lifetime_res(&self, id: NodeId) -> Option<LifetimeRes> {
-        self.lifetimes_res_map.get(&id).copied()
-    }
-
     /// Obtain the list of lifetimes parameters to add to an item.
     ///
     /// Extra lifetime parameters should only be added in places that can appear
@@ -321,10 +311,6 @@ fn delegation_info(&self, id: LocalDefId) -> Option<&DelegationInfo> {
     fn owner_def_id(&self, id: NodeId) -> LocalDefId {
         self.owners[&id].def_id
     }
-
-    fn lifetime_elision_allowed(&self, id: NodeId) -> bool {
-        self.lifetime_elision_allowed.contains(&id)
-    }
 }
 
 /// How relaxed bounds `?Trait` should be treated.
@@ -1625,7 +1611,7 @@ fn lower_ty_direct_lifetime(
 
             None => {
                 let id = if let Some(LifetimeRes::ElidedAnchor { start, end }) =
-                    self.resolver.get_lifetime_res(t.id)
+                    self.owner.get_lifetime_res(t.id)
                 {
                     assert_eq!(start.plus(1), end);
                     start
@@ -1866,7 +1852,9 @@ fn lower_fn_decl(
                     _ => hir::ImplicitSelfKind::None,
                 }
             }))
-            .set_lifetime_elision_allowed(self.resolver.lifetime_elision_allowed(fn_node_id))
+            .set_lifetime_elision_allowed(
+                self.owner.id == fn_node_id && self.owner.lifetime_elision_allowed,
+            )
             .set_c_variadic(c_variadic);
 
         self.arena.alloc(hir::FnDecl { inputs, output, fn_decl_kind })
@@ -2032,7 +2020,7 @@ fn new_named_lifetime(
         source: LifetimeSource,
         syntax: LifetimeSyntax,
     ) -> &'hir hir::Lifetime {
-        let res = if let Some(res) = self.resolver.get_lifetime_res(id) {
+        let res = if let Some(res) = self.owner.get_lifetime_res(id) {
             match res {
                 LifetimeRes::Param { param, .. } => hir::LifetimeKind::Param(param),
                 LifetimeRes::Fresh { param, .. } => {
@@ -2118,13 +2106,12 @@ fn lower_generic_param_kind(
                 // AST resolution emitted an error on those parameters, so we lower them using
                 // `ParamName::Error`.
                 let ident = self.lower_ident(param.ident);
-                let param_name = if let Some(LifetimeRes::Error(..)) =
-                    self.resolver.get_lifetime_res(param.id)
-                {
-                    ParamName::Error(ident)
-                } else {
-                    ParamName::Plain(ident)
-                };
+                let param_name =
+                    if let Some(LifetimeRes::Error(..)) = self.owner.get_lifetime_res(param.id) {
+                        ParamName::Error(ident)
+                    } else {
+                        ParamName::Plain(ident)
+                    };
                 let kind =
                     hir::GenericParamKind::Lifetime { kind: hir::LifetimeParamKind::Explicit };
 

compiler/rustc_ast_lowering/src/path.rs

@@ -17,7 +17,7 @@
 };
 use super::{
     AllowReturnTypeNotation, GenericArgsCtor, GenericArgsMode, ImplTraitContext, ImplTraitPosition,
-    LifetimeRes, LoweringContext, ParamMode, ResolverAstLoweringExt,
+    LifetimeRes, LoweringContext, ParamMode,
 };
 
 impl<'hir> LoweringContext<'_, 'hir> {
@@ -422,7 +422,7 @@ fn maybe_insert_elided_lifetimes_in_path(
         segment_ident_span: Span,
         generic_args: &mut GenericArgsCtor<'hir>,
     ) {
-        let (start, end) = match self.resolver.get_lifetime_res(segment_id) {
+        let (start, end) = match self.owner.get_lifetime_res(segment_id) {
             Some(LifetimeRes::ElidedAnchor { start, end }) => (start, end),
             None => return,
             Some(res) => {

compiler/rustc_middle/src/lib.rs

@@ -37,6 +37,7 @@
 #![feature(core_intrinsics)]
 #![feature(debug_closure_helpers)]
 #![feature(decl_macro)]
+#![feature(default_field_values)]
 #![feature(deref_patterns)]
 #![feature(discriminant_kind)]
 #![feature(extern_types)]

compiler/rustc_middle/src/ty/mod.rs

@@ -31,7 +31,7 @@
 use rustc_ast::expand::typetree::{FncTree, Kind, Type, TypeTree};
 use rustc_ast::node_id::NodeMap;
 pub use rustc_ast_ir::{Movability, Mutability, try_visit};
-use rustc_data_structures::fx::{FxHashSet, FxIndexMap, FxIndexSet};
+use rustc_data_structures::fx::{FxIndexMap, FxIndexSet};
 use rustc_data_structures::intern::Interned;
 use rustc_data_structures::stable_hash::{StableHash, StableHashCtxt, StableHasher};
 use rustc_data_structures::steal::Steal;
@@ -206,7 +206,15 @@ pub struct ResolverGlobalCtxt {
 
 #[derive(Debug)]
 pub struct PerOwnerResolverData {
-    pub node_id_to_def_id: NodeMap<LocalDefId>,
+    pub node_id_to_def_id: NodeMap<LocalDefId> = Default::default(),
+    /// Whether lifetime elision was successful.
+    pub lifetime_elision_allowed: bool = false,
+    /// Resolutions for labels.
+    /// Maps from NodeId of the break/continue expression to the NodeId of their corresponding blocks or loops.
+    pub label_res_map: NodeMap<ast::NodeId> = Default::default(),
+    /// Resolutions for lifetimes.
+    pub lifetimes_res_map: NodeMap<LifetimeRes> = Default::default(),
+
     /// The id of the owner
     pub id: ast::NodeId,
     /// The `DefId` of the owner, can't be found in `node_id_to_def_id`.
@@ -215,7 +223,17 @@ pub struct PerOwnerResolverData {
 
 impl PerOwnerResolverData {
     pub fn new(id: ast::NodeId, def_id: LocalDefId) -> PerOwnerResolverData {
-        PerOwnerResolverData { node_id_to_def_id: Default::default(), id, def_id }
+        PerOwnerResolverData { id, def_id, .. }
+    }
+
+    /// Obtains resolution for a label with the given `NodeId`.
+    pub fn get_label_res(&self, id: ast::NodeId) -> Option<ast::NodeId> {
+        self.label_res_map.get(&id).copied()
+    }
+
+    /// Obtains resolution for a lifetime with the given `NodeId`.
+    pub fn get_lifetime_res(&self, id: ast::NodeId) -> Option<LifetimeRes> {
+        self.lifetimes_res_map.get(&id).copied()
     }
 }
 
@@ -227,10 +245,6 @@ pub struct ResolverAstLowering<'tcx> {
     pub partial_res_map: NodeMap<hir::def::PartialRes>,
     /// Resolutions for import nodes, which have multiple resolutions in different namespaces.
     pub import_res_map: NodeMap<hir::def::PerNS<Option<Res<ast::NodeId>>>>,
-    /// Resolutions for labels (node IDs of their corresponding blocks or loops).
-    pub label_res_map: NodeMap<ast::NodeId>,
-    /// Resolutions for lifetimes.
-    pub lifetimes_res_map: NodeMap<LifetimeRes>,
     /// Lifetime parameters that lowering will have to introduce.
     pub extra_lifetime_params_map: NodeMap<Vec<(Ident, ast::NodeId, LifetimeRes)>>,
 
@@ -239,8 +253,6 @@ pub struct ResolverAstLowering<'tcx> {
     pub owners: NodeMap<PerOwnerResolverData>,
 
     pub trait_map: NodeMap<&'tcx [hir::TraitCandidate<'tcx>]>,
-    /// List functions and methods for which lifetime elision was successful.
-    pub lifetime_elision_allowed: FxHashSet<ast::NodeId>,
 
     /// Lints that were emitted by the resolver and early lints.
     pub lint_buffer: Steal<LintBuffer>,

compiler/rustc_resolve/src/late.rs

@@ -2412,7 +2412,7 @@ fn record_lifetime_res(
         res: LifetimeRes,
         candidate: LifetimeElisionCandidate,
     ) {
-        if let Some(prev_res) = self.r.lifetimes_res_map.insert(id, res) {
+        if let Some(prev_res) = self.r.current_owner.lifetimes_res_map.insert(id, res) {
             panic!("lifetime {id:?} resolved multiple times ({prev_res:?} before, {res:?} now)")
         }
 
@@ -2428,7 +2428,7 @@ fn record_lifetime_res(
 
     #[instrument(level = "debug", skip(self))]
     fn record_lifetime_param(&mut self, id: NodeId, res: LifetimeRes) {
-        if let Some(prev_res) = self.r.lifetimes_res_map.insert(id, res) {
+        if let Some(prev_res) = self.r.current_owner.lifetimes_res_map.insert(id, res) {
             panic!(
                 "lifetime parameter {id:?} resolved multiple times ({prev_res:?} before, {res:?} now)"
             )
@@ -2456,7 +2456,9 @@ fn resolve_fn_signature(
 
             let outer_failures = take(&mut this.diag_metadata.current_elision_failures);
             let output_rib = if let Ok(res) = elision_lifetime.as_ref() {
-                this.r.lifetime_elision_allowed.insert(fn_id);
+                if fn_id == this.r.current_owner.id {
+                    this.r.current_owner.lifetime_elision_allowed = true;
+                }
                 LifetimeRibKind::Elided(*res)
             } else {
                 LifetimeRibKind::ElisionFailure
@@ -2635,11 +2637,11 @@ fn visit_ty(&mut self, ty: &'ra Ty) {
                         let lt_id = if let Some(lt) = lt {
                             lt.id
                         } else {
-                            let res = self.r.lifetimes_res_map[&ty.id];
+                            let res = self.r.current_owner.lifetimes_res_map[&ty.id];
                             let LifetimeRes::ElidedAnchor { start, .. } = res else { bug!() };
                             start
                         };
-                        let lt_res = self.r.lifetimes_res_map[&lt_id];
+                        let lt_res = self.r.current_owner.lifetimes_res_map[&lt_id];
                         trace!("FindReferenceVisitor inserting res={:?}", lt_res);
                         self.lifetime.insert(lt_res);
                     }
@@ -5212,7 +5214,7 @@ fn resolve_expr(&mut self, expr: &'ast Expr, parent: Option<&'ast Expr>) {
                 match self.resolve_label(label.ident) {
                     Ok((node_id, _)) => {
                         // Since this res is a label, it is never read.
-                        self.r.label_res_map.insert(expr.id, node_id);
+                        self.r.current_owner.label_res_map.insert(expr.id, node_id);
                         self.diag_metadata.unused_labels.swap_remove(&node_id);
                     }
                     Err(error) => {

compiler/rustc_resolve/src/lib.rs

@@ -1380,10 +1380,6 @@ pub struct Resolver<'ra, 'tcx> {
     import_res_map: NodeMap<PerNS<Option<Res>>> = Default::default(),
     /// An import will be inserted into this map if it has been used.
     import_use_map: FxHashMap<Import<'ra>, Used> = default::fx_hash_map(),
-    /// Resolutions for labels (node IDs of their corresponding blocks or loops).
-    label_res_map: NodeMap<NodeId> = Default::default(),
-    /// Resolutions for lifetimes.
-    lifetimes_res_map: NodeMap<LifetimeRes> = Default::default(),
     /// Lifetime parameters that lowering will have to introduce.
     extra_lifetime_params_map: NodeMap<Vec<(Ident, NodeId, LifetimeRes)>> = Default::default(),
 
@@ -1533,8 +1529,6 @@ pub struct Resolver<'ra, 'tcx> {
     /// they are declared in the static array generated by proc_macro_harness.
     proc_macros: Vec<LocalDefId> = Vec::new(),
     confused_type_with_std_module: FxIndexMap<Span, Span>,
-    /// Whether lifetime elision was successful.
-    lifetime_elision_allowed: FxHashSet<NodeId> = default::fx_hash_set(),
 
     /// Names of items that were stripped out via cfg with their corresponding cfg meta item.
     stripped_cfg_items: Vec<StrippedCfgItem<NodeId>> = Vec::new(),
@@ -2017,13 +2011,10 @@ pub fn into_outputs(self) -> ResolverOutputs<'tcx> {
         let ast_lowering = ty::ResolverAstLowering {
             partial_res_map: self.partial_res_map,
             import_res_map: self.import_res_map,
-            label_res_map: self.label_res_map,
-            lifetimes_res_map: self.lifetimes_res_map,
             extra_lifetime_params_map: self.extra_lifetime_params_map,
             next_node_id: self.next_node_id,
             owners: self.owners,
             trait_map: self.trait_map,
-            lifetime_elision_allowed: self.lifetime_elision_allowed,
             lint_buffer: Steal::new(self.lint_buffer),
             delegation_infos: self.delegation_infos,
             disambiguators,