Rollup merge of #61389 - Zoxc:arena-cleanup, r=eddyb

Remove GlobalArenas and use Arena instead

r? @eddyb

10 files changed, 33 insertions, 61 deletions

diff --git a/src/librustc/arena.rs b/src/librustc/arena.rs
index c179b05683d..4a89bf3313b 100644
--- a/src/librustc/arena.rs
+++ b/src/librustc/arena.rs
@@ -19,6 +19,14 @@ use smallvec::SmallVec;
 macro_rules! arena_types {
     ($macro:path, $args:tt, $tcx:lifetime) => (
         $macro!($args, [
+            [] layouts: rustc::ty::layout::LayoutDetails,
+            [] generics: rustc::ty::Generics,
+            [] trait_def: rustc::ty::TraitDef,
+            [] adt_def: rustc::ty::AdtDef,
+            [] steal_mir: rustc::ty::steal::Steal<rustc::mir::Body<$tcx>>,
+            [] mir: rustc::mir::Body<$tcx>,
+            [] tables: rustc::ty::TypeckTables<$tcx>,
+            [] const_allocs: rustc::mir::interpret::Allocation,
             [] vtable_method: Option<(
                 rustc::hir::def_id::DefId,
                 rustc::ty::subst::SubstsRef<$tcx>
diff --git a/src/librustc/query/mod.rs b/src/librustc/query/mod.rs
index f61677fa594..b8621c8ad30 100644
--- a/src/librustc/query/mod.rs
+++ b/src/librustc/query/mod.rs
@@ -42,7 +42,7 @@ rustc_queries! {
             load_cached(tcx, id) {
                 let generics: Option<ty::Generics> = tcx.queries.on_disk_cache
                                                         .try_load_query_result(tcx, id);
-                generics.map(|x| tcx.alloc_generics(x))
+                generics.map(|x| &*tcx.arena.alloc(x))
             }
         }
 
@@ -118,7 +118,7 @@ rustc_queries! {
             load_cached(tcx, id) {
                 let mir: Option<crate::mir::Body<'tcx>> = tcx.queries.on_disk_cache
                                                             .try_load_query_result(tcx, id);
-                mir.map(|x| tcx.alloc_mir(x))
+                mir.map(|x| &*tcx.arena.alloc(x))
             }
         }
     }
@@ -353,7 +353,7 @@ rustc_queries! {
                     .queries.on_disk_cache
                     .try_load_query_result(tcx, id);
 
-                typeck_tables.map(|tables| tcx.alloc_tables(tables))
+                typeck_tables.map(|tables| &*tcx.arena.alloc(tables))
             }
         }
     }
diff --git a/src/librustc/ty/context.rs b/src/librustc/ty/context.rs
index ff218911ffb..b4823db9920 100644
--- a/src/librustc/ty/context.rs
+++ b/src/librustc/ty/context.rs
@@ -53,7 +53,7 @@ use smallvec::SmallVec;
 use rustc_data_structures::stable_hasher::{HashStable, hash_stable_hashmap,
                                            StableHasher, StableHasherResult,
                                            StableVec};
-use arena::{TypedArena, SyncDroplessArena};
+use arena::SyncDroplessArena;
 use rustc_data_structures::indexed_vec::{Idx, IndexVec};
 use rustc_data_structures::sync::{Lrc, Lock, WorkerLocal};
 use std::any::Any;
@@ -79,37 +79,18 @@ use syntax_pos::Span;
 
 use crate::hir;
 
-pub struct AllArenas<'tcx> {
-    pub global: WorkerLocal<GlobalArenas<'tcx>>,
+pub struct AllArenas {
     pub interner: SyncDroplessArena,
 }
 
-impl<'tcx> AllArenas<'tcx> {
+impl AllArenas {
     pub fn new() -> Self {
         AllArenas {
-            global: WorkerLocal::new(|_| GlobalArenas::default()),
             interner: SyncDroplessArena::default(),
         }
     }
 }
 
-/// Internal storage
-#[derive(Default)]
-pub struct GlobalArenas<'tcx> {
-    // internings
-    layout: TypedArena<LayoutDetails>,
-
-    // references
-    generics: TypedArena<ty::Generics>,
-    trait_def: TypedArena<ty::TraitDef>,
-    adt_def: TypedArena<ty::AdtDef>,
-    steal_mir: TypedArena<Steal<Body<'tcx>>>,
-    mir: TypedArena<Body<'tcx>>,
-    tables: TypedArena<ty::TypeckTables<'tcx>>,
-    /// miri allocations
-    const_allocs: TypedArena<interpret::Allocation>,
-}
-
 type InternedSet<'tcx, T> = Lock<FxHashMap<Interned<'tcx, T>, ()>>;
 
 pub struct CtxtInterners<'tcx> {
@@ -1043,7 +1024,7 @@ impl<'gcx> Deref for TyCtxt<'_, 'gcx, '_> {
 
 pub struct GlobalCtxt<'tcx> {
     pub arena: WorkerLocal<Arena<'tcx>>,
-    global_arenas: &'tcx WorkerLocal<GlobalArenas<'tcx>>,
+
     global_interners: CtxtInterners<'tcx>,
 
     cstore: &'tcx CrateStoreDyn,
@@ -1150,24 +1131,8 @@ impl<'a, 'gcx, 'tcx> TyCtxt<'a, 'gcx, 'tcx> {
         &self.hir_map
     }
 
-    pub fn alloc_generics(self, generics: ty::Generics) -> &'gcx ty::Generics {
-        self.global_arenas.generics.alloc(generics)
-    }
-
     pub fn alloc_steal_mir(self, mir: Body<'gcx>) -> &'gcx Steal<Body<'gcx>> {
-        self.global_arenas.steal_mir.alloc(Steal::new(mir))
-    }
-
-    pub fn alloc_mir(self, mir: Body<'gcx>) -> &'gcx Body<'gcx> {
-        self.global_arenas.mir.alloc(mir)
-    }
-
-    pub fn alloc_tables(self, tables: ty::TypeckTables<'gcx>) -> &'gcx ty::TypeckTables<'gcx> {
-        self.global_arenas.tables.alloc(tables)
-    }
-
-    pub fn alloc_trait_def(self, def: ty::TraitDef) -> &'gcx ty::TraitDef {
-        self.global_arenas.trait_def.alloc(def)
+        self.arena.alloc(Steal::new(mir))
     }
 
     pub fn alloc_adt_def(self,
@@ -1177,12 +1142,12 @@ impl<'a, 'gcx, 'tcx> TyCtxt<'a, 'gcx, 'tcx> {
                          repr: ReprOptions)
                          -> &'gcx ty::AdtDef {
         let def = ty::AdtDef::new(self, did, kind, variants, repr);
-        self.global_arenas.adt_def.alloc(def)
+        self.arena.alloc(def)
     }
 
     pub fn intern_const_alloc(self, alloc: Allocation) -> &'gcx Allocation {
         self.allocation_interner.borrow_mut().intern(alloc, |alloc| {
-            self.global_arenas.const_allocs.alloc(alloc)
+            self.arena.alloc(alloc)
         })
     }
 
@@ -1196,13 +1161,13 @@ impl<'a, 'gcx, 'tcx> TyCtxt<'a, 'gcx, 'tcx> {
 
     pub fn intern_stability(self, stab: attr::Stability) -> &'gcx attr::Stability {
         self.stability_interner.borrow_mut().intern(stab, |stab| {
-            self.global_interners.arena.alloc(stab)
+            self.arena.alloc(stab)
         })
     }
 
     pub fn intern_layout(self, layout: LayoutDetails) -> &'gcx LayoutDetails {
         self.layout_interner.borrow_mut().intern(layout, |layout| {
-            self.global_arenas.layout.alloc(layout)
+            self.arena.alloc(layout)
         })
     }
 
@@ -1250,7 +1215,7 @@ impl<'a, 'gcx, 'tcx> TyCtxt<'a, 'gcx, 'tcx> {
         cstore: &'tcx CrateStoreDyn,
         local_providers: ty::query::Providers<'tcx>,
         extern_providers: ty::query::Providers<'tcx>,
-        arenas: &'tcx AllArenas<'tcx>,
+        arenas: &'tcx AllArenas,
         resolutions: ty::Resolutions,
         hir: hir_map::Map<'tcx>,
         on_disk_query_result_cache: query::OnDiskCache<'tcx>,
@@ -1319,7 +1284,6 @@ impl<'a, 'gcx, 'tcx> TyCtxt<'a, 'gcx, 'tcx> {
             sess: s,
             cstore,
             arena: WorkerLocal::new(|_| Arena::default()),
-            global_arenas: &arenas.global,
             global_interners: interners,
             dep_graph,
             common,
diff --git a/src/librustc/ty/mod.rs b/src/librustc/ty/mod.rs
index 0cbc0112a8e..094e1d05aeb 100644
--- a/src/librustc/ty/mod.rs
+++ b/src/librustc/ty/mod.rs
@@ -75,7 +75,7 @@ pub use self::sty::TyKind::*;
 pub use self::binding::BindingMode;
 pub use self::binding::BindingMode::*;
 
-pub use self::context::{TyCtxt, FreeRegionInfo, GlobalArenas, AllArenas, tls, keep_local};
+pub use self::context::{TyCtxt, FreeRegionInfo, AllArenas, tls, keep_local};
 pub use self::context::{Lift, TypeckTables, CtxtInterners, GlobalCtxt};
 pub use self::context::{
     UserTypeAnnotationIndex, UserType, CanonicalUserType,
diff --git a/src/librustc_metadata/cstore_impl.rs b/src/librustc_metadata/cstore_impl.rs
index e04372ea280..db452bb4ac7 100644
--- a/src/librustc_metadata/cstore_impl.rs
+++ b/src/librustc_metadata/cstore_impl.rs
@@ -94,7 +94,7 @@ impl IntoArgs for (CrateNum, DefId) {
 provide! { <'tcx> tcx, def_id, other, cdata,
     type_of => { cdata.get_type(def_id.index, tcx) }
     generics_of => {
-        tcx.alloc_generics(cdata.get_generics(def_id.index, tcx.sess))
+        tcx.arena.alloc(cdata.get_generics(def_id.index, tcx.sess))
     }
     predicates_of => { tcx.arena.alloc(cdata.get_predicates(def_id.index, tcx)) }
     predicates_defined_on => {
@@ -102,7 +102,7 @@ provide! { <'tcx> tcx, def_id, other, cdata,
     }
     super_predicates_of => { tcx.arena.alloc(cdata.get_super_predicates(def_id.index, tcx)) }
     trait_def => {
-        tcx.alloc_trait_def(cdata.get_trait_def(def_id.index, tcx.sess))
+        tcx.arena.alloc(cdata.get_trait_def(def_id.index, tcx.sess))
     }
     adt_def => { cdata.get_adt_def(def_id.index, tcx) }
     adt_destructor => {
@@ -129,7 +129,7 @@ provide! { <'tcx> tcx, def_id, other, cdata,
             bug!("get_optimized_mir: missing MIR for `{:?}`", def_id)
         });
 
-        let mir = tcx.alloc_mir(mir);
+        let mir = tcx.arena.alloc(mir);
 
         mir
     }
diff --git a/src/librustc_mir/shim.rs b/src/librustc_mir/shim.rs
index 087f8779b69..0cefc8c3a92 100644
--- a/src/librustc_mir/shim.rs
+++ b/src/librustc_mir/shim.rs
@@ -125,7 +125,7 @@ fn make_shim<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>,
 
     debug!("make_shim({:?}) = {:?}", instance, result);
 
-    tcx.alloc_mir(result)
+    tcx.arena.alloc(result)
 }
 
 #[derive(Copy, Clone, Debug, PartialEq)]
diff --git a/src/librustc_mir/transform/mod.rs b/src/librustc_mir/transform/mod.rs
index 22b96a9db47..82193d98655 100644
--- a/src/librustc_mir/transform/mod.rs
+++ b/src/librustc_mir/transform/mod.rs
@@ -290,5 +290,5 @@ fn optimized_mir<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>, def_id: DefId) -> &'tcx
         &add_call_guards::CriticalCallEdges,
         &dump_mir::Marker("PreCodegen"),
     ]);
-    tcx.alloc_mir(mir)
+    tcx.arena.alloc(mir)
 }
diff --git a/src/librustc_typeck/check/writeback.rs b/src/librustc_typeck/check/writeback.rs
index a856013b719..9e60bff200e 100644
--- a/src/librustc_typeck/check/writeback.rs
+++ b/src/librustc_typeck/check/writeback.rs
@@ -81,7 +81,7 @@ impl<'a, 'gcx, 'tcx> FnCtxt<'a, 'gcx, 'tcx> {
             item_def_id, wbcx.tables
         );
 
-        self.tcx.alloc_tables(wbcx.tables)
+        self.tcx.arena.alloc(wbcx.tables)
     }
 }
 
diff --git a/src/librustc_typeck/collect.rs b/src/librustc_typeck/collect.rs
index 3806fd0998b..c516fbc3bb9 100644
--- a/src/librustc_typeck/collect.rs
+++ b/src/librustc_typeck/collect.rs
@@ -763,7 +763,7 @@ fn trait_def<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>, def_id: DefId) -> &'tcx ty::
     let is_marker = tcx.has_attr(def_id, sym::marker);
     let def_path_hash = tcx.def_path_hash(def_id);
     let def = ty::TraitDef::new(def_id, unsafety, paren_sugar, is_auto, is_marker, def_path_hash);
-    tcx.alloc_trait_def(def)
+    tcx.arena.alloc(def)
 }
 
 fn has_late_bound_regions<'a, 'tcx>(
@@ -1110,7 +1110,7 @@ fn generics_of<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>, def_id: DefId) -> &'tcx ty
         .map(|param| (param.def_id, param.index))
         .collect();
 
-    tcx.alloc_generics(ty::Generics {
+    tcx.arena.alloc(ty::Generics {
         parent: parent_def_id,
         parent_count,
         params,
diff --git a/src/libsyntax/attr/builtin.rs b/src/libsyntax/attr/builtin.rs
index b96f13335b2..bf6eab4ec91 100644
--- a/src/libsyntax/attr/builtin.rs
+++ b/src/libsyntax/attr/builtin.rs
@@ -111,7 +111,7 @@ pub fn find_unwind_attr(diagnostic: Option<&Handler>, attrs: &[Attribute]) -> Op
 }
 
 /// Represents the #[stable], #[unstable], #[rustc_{deprecated,const_unstable}] attributes.
-#[derive(RustcEncodable, RustcDecodable, Clone, Debug, PartialEq, Eq, Hash)]
+#[derive(RustcEncodable, RustcDecodable, Copy, Clone, Debug, PartialEq, Eq, Hash)]
 pub struct Stability {
     pub level: StabilityLevel,
     pub feature: Symbol,
@@ -127,7 +127,7 @@ pub struct Stability {
 }
 
 /// The available stability levels.
-#[derive(RustcEncodable, RustcDecodable, PartialEq, PartialOrd, Clone, Debug, Eq, Hash)]
+#[derive(RustcEncodable, RustcDecodable, PartialEq, PartialOrd, Copy, Clone, Debug, Eq, Hash)]
 pub enum StabilityLevel {
     // Reason for the current stability level and the relevant rust-lang issue
     Unstable { reason: Option<Symbol>, issue: u32 },
@@ -151,7 +151,7 @@ impl StabilityLevel {
     }
 }
 
-#[derive(RustcEncodable, RustcDecodable, PartialEq, PartialOrd, Clone, Debug, Eq, Hash)]
+#[derive(RustcEncodable, RustcDecodable, PartialEq, PartialOrd, Copy, Clone, Debug, Eq, Hash)]
 pub struct RustcDeprecation {
     pub since: Symbol,
     pub reason: Symbol,