tree-wide: parallel: Fully removed all Lrc, replaced with Arc

compiler/rustc_ast/src/ast.rs

@@ -19,6 +19,7 @@
 //! - [`UnOp`], [`BinOp`], and [`BinOpKind`]: Unary and binary operators.
 
 use std::borrow::Cow;
+use std::sync::Arc;
 use std::{cmp, fmt};
 
 pub use GenericArgs::*;
@@ -27,7 +28,6 @@ pub use rustc_ast_ir::{Movability, Mutability, Pinnedness};
 use rustc_data_structures::packed::Pu128;
 use rustc_data_structures::stable_hasher::{HashStable, StableHasher};
 use rustc_data_structures::stack::ensure_sufficient_stack;
-use rustc_data_structures::sync::Lrc;
 use rustc_data_structures::tagged_ptr::Tag;
 use rustc_macros::{Decodable, Encodable, HashStable_Generic};
 pub use rustc_span::AttrId;
@@ -1611,7 +1611,7 @@ pub enum ExprKind {
     /// Added for optimization purposes to avoid the need to escape
     /// large binary blobs - should always behave like [`ExprKind::Lit`]
     /// with a `ByteStr` literal.
-    IncludedBytes(Lrc<[u8]>),
+    IncludedBytes(Arc<[u8]>),
 
     /// A `format_args!()` expression.
     FormatArgs(P<FormatArgs>),
@@ -1904,9 +1904,9 @@ pub enum LitKind {
     Str(Symbol, StrStyle),
     /// A byte string (`b"foo"`). Not stored as a symbol because it might be
     /// non-utf8, and symbols only allow utf8 strings.
-    ByteStr(Lrc<[u8]>, StrStyle),
+    ByteStr(Arc<[u8]>, StrStyle),
     /// A C String (`c"foo"`). Guaranteed to only have `\0` at the end.
-    CStr(Lrc<[u8]>, StrStyle),
+    CStr(Arc<[u8]>, StrStyle),
     /// A byte char (`b'f'`).
     Byte(u8),
     /// A character literal (`'a'`).

compiler/rustc_ast/src/mut_visit.rs

@@ -9,10 +9,10 @@
 
 use std::ops::DerefMut;
 use std::panic;
+use std::sync::Arc;
 
 use rustc_data_structures::flat_map_in_place::FlatMapInPlace;
 use rustc_data_structures::stack::ensure_sufficient_stack;
-use rustc_data_structures::sync::Lrc;
 use rustc_span::source_map::Spanned;
 use rustc_span::{Ident, Span};
 use smallvec::{Array, SmallVec, smallvec};
@@ -789,14 +789,14 @@ fn visit_tt<T: MutVisitor>(vis: &mut T, tt: &mut TokenTree) {
 // No `noop_` prefix because there isn't a corresponding method in `MutVisitor`.
 fn visit_tts<T: MutVisitor>(vis: &mut T, TokenStream(tts): &mut TokenStream) {
     if T::VISIT_TOKENS && !tts.is_empty() {
-        let tts = Lrc::make_mut(tts);
+        let tts = Arc::make_mut(tts);
         visit_vec(tts, |tree| visit_tt(vis, tree));
     }
 }
 
 fn visit_attr_tts<T: MutVisitor>(vis: &mut T, AttrTokenStream(tts): &mut AttrTokenStream) {
     if T::VISIT_TOKENS && !tts.is_empty() {
-        let tts = Lrc::make_mut(tts);
+        let tts = Arc::make_mut(tts);
         visit_vec(tts, |tree| visit_attr_tt(vis, tree));
     }
 }
@@ -836,7 +836,7 @@ pub fn visit_token<T: MutVisitor>(vis: &mut T, t: &mut Token) {
             vis.visit_ident(ident);
         }
         token::Interpolated(nt) => {
-            let nt = Lrc::make_mut(nt);
+            let nt = Arc::make_mut(nt);
             visit_nonterminal(vis, nt);
         }
         _ => {}

compiler/rustc_ast/src/token.rs

@@ -1,5 +1,6 @@
 use std::borrow::Cow;
 use std::fmt;
+use std::sync::Arc;
 
 pub use BinOpToken::*;
 pub use LitKind::*;
@@ -8,7 +9,6 @@ pub use NtExprKind::*;
 pub use NtPatKind::*;
 pub use TokenKind::*;
 use rustc_data_structures::stable_hasher::{HashStable, StableHasher};
-use rustc_data_structures::sync::Lrc;
 use rustc_macros::{Decodable, Encodable, HashStable_Generic};
 use rustc_span::edition::Edition;
 use rustc_span::{DUMMY_SP, ErrorGuaranteed, Span, kw, sym};
@@ -451,7 +451,7 @@ pub enum TokenKind {
     /// The span in the surrounding `Token` is that of the metavariable in the
     /// macro's RHS. The span within the Nonterminal is that of the fragment
     /// passed to the macro at the call site.
-    Interpolated(Lrc<Nonterminal>),
+    Interpolated(Arc<Nonterminal>),
 
     /// A doc comment token.
     /// `Symbol` is the doc comment's data excluding its "quotes" (`///`, `/**`, etc)
@@ -469,7 +469,7 @@ impl Clone for TokenKind {
         // a copy. This is faster than the `derive(Clone)` version which has a
         // separate path for every variant.
         match self {
-            Interpolated(nt) => Interpolated(Lrc::clone(nt)),
+            Interpolated(nt) => Interpolated(Arc::clone(nt)),
             _ => unsafe { std::ptr::read(self) },
         }
     }

compiler/rustc_ast/src/tokenstream.rs

@@ -14,10 +14,11 @@
 //! ownership of the original.
 
 use std::borrow::Cow;
+use std::sync::Arc;
 use std::{cmp, fmt, iter};
 
 use rustc_data_structures::stable_hasher::{HashStable, StableHasher};
-use rustc_data_structures::sync::{self, Lrc};
+use rustc_data_structures::sync;
 use rustc_macros::{Decodable, Encodable, HashStable_Generic};
 use rustc_serialize::{Decodable, Encodable};
 use rustc_span::{DUMMY_SP, Span, SpanDecoder, SpanEncoder, Symbol, sym};
@@ -119,11 +120,11 @@ impl ToAttrTokenStream for AttrTokenStream {
 /// of an actual `TokenStream` until it is needed.
 /// `Box` is here only to reduce the structure size.
 #[derive(Clone)]
-pub struct LazyAttrTokenStream(Lrc<Box<dyn ToAttrTokenStream>>);
+pub struct LazyAttrTokenStream(Arc<Box<dyn ToAttrTokenStream>>);
 
 impl LazyAttrTokenStream {
     pub fn new(inner: impl ToAttrTokenStream + 'static) -> LazyAttrTokenStream {
-        LazyAttrTokenStream(Lrc::new(Box::new(inner)))
+        LazyAttrTokenStream(Arc::new(Box::new(inner)))
     }
 
     pub fn to_attr_token_stream(&self) -> AttrTokenStream {
@@ -160,7 +161,7 @@ impl<CTX> HashStable<CTX> for LazyAttrTokenStream {
 /// during expansion to perform early cfg-expansion, and to process attributes
 /// during proc-macro invocations.
 #[derive(Clone, Debug, Default, Encodable, Decodable)]
-pub struct AttrTokenStream(pub Lrc<Vec<AttrTokenTree>>);
+pub struct AttrTokenStream(pub Arc<Vec<AttrTokenTree>>);
 
 /// Like `TokenTree`, but for `AttrTokenStream`.
 #[derive(Clone, Debug, Encodable, Decodable)]
@@ -175,7 +176,7 @@ pub enum AttrTokenTree {
 
 impl AttrTokenStream {
     pub fn new(tokens: Vec<AttrTokenTree>) -> AttrTokenStream {
-        AttrTokenStream(Lrc::new(tokens))
+        AttrTokenStream(Arc::new(tokens))
     }
 
     /// Converts this `AttrTokenStream` to a plain `Vec<TokenTree>`. During
@@ -293,7 +294,7 @@ pub struct AttrsTarget {
 /// Today's `TokenTree`s can still contain AST via `token::Interpolated` for
 /// backwards compatibility.
 #[derive(Clone, Debug, Default, Encodable, Decodable)]
-pub struct TokenStream(pub(crate) Lrc<Vec<TokenTree>>);
+pub struct TokenStream(pub(crate) Arc<Vec<TokenTree>>);
 
 /// Indicates whether a token can join with the following token to form a
 /// compound token. Used for conversions to `proc_macro::Spacing`. Also used to
@@ -412,7 +413,7 @@ impl PartialEq<TokenStream> for TokenStream {
 
 impl TokenStream {
     pub fn new(tts: Vec<TokenTree>) -> TokenStream {
-        TokenStream(Lrc::new(tts))
+        TokenStream(Arc::new(tts))
     }
 
     pub fn is_empty(&self) -> bool {
@@ -544,7 +545,7 @@ impl TokenStream {
     /// Push `tt` onto the end of the stream, possibly gluing it to the last
     /// token. Uses `make_mut` to maximize efficiency.
     pub fn push_tree(&mut self, tt: TokenTree) {
-        let vec_mut = Lrc::make_mut(&mut self.0);
+        let vec_mut = Arc::make_mut(&mut self.0);
 
         if Self::try_glue_to_last(vec_mut, &tt) {
             // nothing else to do
@@ -557,7 +558,7 @@ impl TokenStream {
     /// token tree to the last token. (No other token trees will be glued.)
     /// Uses `make_mut` to maximize efficiency.
     pub fn push_stream(&mut self, stream: TokenStream) {
-        let vec_mut = Lrc::make_mut(&mut self.0);
+        let vec_mut = Arc::make_mut(&mut self.0);
 
         let stream_iter = stream.0.iter().cloned();
 
@@ -577,7 +578,7 @@ impl TokenStream {
     }
 
     /// Desugar doc comments like `/// foo` in the stream into `#[doc =
-    /// r"foo"]`. Modifies the `TokenStream` via `Lrc::make_mut`, but as little
+    /// r"foo"]`. Modifies the `TokenStream` via `Arc::make_mut`, but as little
     /// as possible.
     pub fn desugar_doc_comments(&mut self) {
         if let Some(desugared_stream) = desugar_inner(self.clone()) {
@@ -596,7 +597,7 @@ impl TokenStream {
                     ) => {
                         let desugared = desugared_tts(attr_style, data, span);
                         let desugared_len = desugared.len();
-                        Lrc::make_mut(&mut stream.0).splice(i..i + 1, desugared);
+                        Arc::make_mut(&mut stream.0).splice(i..i + 1, desugared);
                         modified = true;
                         i += desugared_len;
                     }
@@ -607,7 +608,7 @@ impl TokenStream {
                         if let Some(desugared_delim_stream) = desugar_inner(delim_stream.clone()) {
                             let new_tt =
                                 TokenTree::Delimited(sp, spacing, delim, desugared_delim_stream);
-                            Lrc::make_mut(&mut stream.0)[i] = new_tt;
+                            Arc::make_mut(&mut stream.0)[i] = new_tt;
                             modified = true;
                         }
                         i += 1;

compiler/rustc_ast/src/util/literal.rs

@@ -121,7 +121,7 @@ impl LitKind {
             }
             token::ByteStrRaw(n) => {
                 // Raw strings have no escapes so we can convert the symbol
-                // directly to a `Lrc<u8>`.
+                // directly to a `Arc<u8>`.
                 let buf = symbol.as_str().to_owned().into_bytes();
                 LitKind::ByteStr(buf.into(), StrStyle::Raw(n))
             }
@@ -142,7 +142,7 @@ impl LitKind {
             }
             token::CStrRaw(n) => {
                 // Raw strings have no escapes so we can convert the symbol
-                // directly to a `Lrc<u8>` after appending the terminating NUL
+                // directly to a `Arc<u8>` after appending the terminating NUL
                 // char.
                 let mut buf = symbol.as_str().to_owned().into_bytes();
                 buf.push(0);

compiler/rustc_ast_lowering/src/expr.rs

@@ -1,11 +1,11 @@
 use std::assert_matches::assert_matches;
 use std::ops::ControlFlow;
+use std::sync::Arc;
 
 use rustc_ast::ptr::P as AstP;
 use rustc_ast::*;
 use rustc_ast_pretty::pprust::expr_to_string;
 use rustc_data_structures::stack::ensure_sufficient_stack;
-use rustc_data_structures::sync::Lrc;
 use rustc_hir as hir;
 use rustc_hir::HirId;
 use rustc_hir::def::{DefKind, Res};
@@ -147,7 +147,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
                 ExprKind::IncludedBytes(bytes) => {
                     let lit = self.arena.alloc(respan(
                         self.lower_span(e.span),
-                        LitKind::ByteStr(Lrc::clone(bytes), StrStyle::Cooked),
+                        LitKind::ByteStr(Arc::clone(bytes), StrStyle::Cooked),
                     ));
                     hir::ExprKind::Lit(lit)
                 }
@@ -602,15 +602,15 @@ impl<'hir> LoweringContext<'_, 'hir> {
                     this.mark_span_with_reason(
                         DesugaringKind::TryBlock,
                         expr.span,
-                        Some(Lrc::clone(&this.allow_try_trait)),
+                        Some(Arc::clone(&this.allow_try_trait)),
                     ),
                     expr,
                 )
             } else {
                 let try_span = this.mark_span_with_reason(
                     DesugaringKind::TryBlock,
                     this.tcx.sess.source_map().end_point(body.span),
-                    Some(Lrc::clone(&this.allow_try_trait)),
+                    Some(Arc::clone(&this.allow_try_trait)),
                 );
 
                 (try_span, this.expr_unit(try_span))
@@ -719,7 +719,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
                 let unstable_span = self.mark_span_with_reason(
                     DesugaringKind::Async,
                     self.lower_span(span),
-                    Some(Lrc::clone(&self.allow_gen_future)),
+                    Some(Arc::clone(&self.allow_gen_future)),
                 );
                 let resume_ty =
                     self.make_lang_item_qpath(hir::LangItem::ResumeTy, unstable_span, None);
@@ -803,7 +803,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
             let unstable_span = self.mark_span_with_reason(
                 DesugaringKind::Async,
                 span,
-                Some(Lrc::clone(&self.allow_gen_future)),
+                Some(Arc::clone(&self.allow_gen_future)),
             );
             self.lower_attrs(inner_hir_id, &[Attribute {
                 kind: AttrKind::Normal(ptr::P(NormalAttr::from_ident(Ident::new(
@@ -879,13 +879,13 @@ impl<'hir> LoweringContext<'_, 'hir> {
 
         let features = match await_kind {
             FutureKind::Future => None,
-            FutureKind::AsyncIterator => Some(Lrc::clone(&self.allow_for_await)),
+            FutureKind::AsyncIterator => Some(Arc::clone(&self.allow_for_await)),
         };
         let span = self.mark_span_with_reason(DesugaringKind::Await, await_kw_span, features);
         let gen_future_span = self.mark_span_with_reason(
             DesugaringKind::Await,
             full_span,
-            Some(Lrc::clone(&self.allow_gen_future)),
+            Some(Arc::clone(&self.allow_gen_future)),
         );
         let expr_hir_id = expr.hir_id;
 
@@ -1905,13 +1905,13 @@ impl<'hir> LoweringContext<'_, 'hir> {
         let unstable_span = self.mark_span_with_reason(
             DesugaringKind::QuestionMark,
             span,
-            Some(Lrc::clone(&self.allow_try_trait)),
+            Some(Arc::clone(&self.allow_try_trait)),
         );
         let try_span = self.tcx.sess.source_map().end_point(span);
         let try_span = self.mark_span_with_reason(
             DesugaringKind::QuestionMark,
             try_span,
-            Some(Lrc::clone(&self.allow_try_trait)),
+            Some(Arc::clone(&self.allow_try_trait)),
         );
 
         // `Try::branch(<expr>)`
@@ -2005,7 +2005,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
         let unstable_span = self.mark_span_with_reason(
             DesugaringKind::YeetExpr,
             span,
-            Some(Lrc::clone(&self.allow_try_trait)),
+            Some(Arc::clone(&self.allow_try_trait)),
         );
 
         let from_yeet_expr = self.wrap_in_try_constructor(

compiler/rustc_ast_lowering/src/lib.rs

@@ -41,13 +41,14 @@
 #![warn(unreachable_pub)]
 // tidy-alphabetical-end
 
+use std::sync::Arc;
+
 use rustc_ast::node_id::NodeMap;
 use rustc_ast::{self as ast, *};
 use rustc_data_structures::captures::Captures;
 use rustc_data_structures::fingerprint::Fingerprint;
 use rustc_data_structures::sorted_map::SortedMap;
 use rustc_data_structures::stable_hasher::{HashStable, StableHasher};
-use rustc_data_structures::sync::Lrc;
 use rustc_data_structures::tagged_ptr::TaggedRef;
 use rustc_errors::{DiagArgFromDisplay, DiagCtxtHandle, StashKey};
 use rustc_hir::def::{DefKind, LifetimeRes, Namespace, PartialRes, PerNS, Res};
@@ -129,11 +130,11 @@ struct LoweringContext<'a, 'hir> {
     #[cfg(debug_assertions)]
     node_id_to_local_id: NodeMap<hir::ItemLocalId>,
 
-    allow_try_trait: Lrc<[Symbol]>,
-    allow_gen_future: Lrc<[Symbol]>,
-    allow_async_iterator: Lrc<[Symbol]>,
-    allow_for_await: Lrc<[Symbol]>,
-    allow_async_fn_traits: Lrc<[Symbol]>,
+    allow_try_trait: Arc<[Symbol]>,
+    allow_gen_future: Arc<[Symbol]>,
+    allow_async_iterator: Arc<[Symbol]>,
+    allow_for_await: Arc<[Symbol]>,
+    allow_async_fn_traits: Arc<[Symbol]>,
 }
 
 impl<'a, 'hir> LoweringContext<'a, 'hir> {
@@ -722,7 +723,7 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
         &self,
         reason: DesugaringKind,
         span: Span,
-        allow_internal_unstable: Option<Lrc<[Symbol]>>,
+        allow_internal_unstable: Option<Arc<[Symbol]>>,
     ) -> Span {
         self.tcx.with_stable_hashing_context(|hcx| {
             span.mark_with_reason(allow_internal_unstable, reason, span.edition(), hcx)
@@ -1664,7 +1665,7 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
             CoroutineKind::Async { return_impl_trait_id, .. } => (return_impl_trait_id, None),
             CoroutineKind::Gen { return_impl_trait_id, .. } => (return_impl_trait_id, None),
             CoroutineKind::AsyncGen { return_impl_trait_id, .. } => {
-                (return_impl_trait_id, Some(Lrc::clone(&self.allow_async_iterator)))
+                (return_impl_trait_id, Some(Arc::clone(&self.allow_async_iterator)))
             }
         };