Auto merge of #136471 - safinaskar:parallel, r=SparrowLii

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

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

This is continuation of https://github.com/rust-lang/rust/pull/132282 .

I'm pretty sure I did everything right. In particular, I searched all occurrences of `Lrc` in submodules and made sure that they don't need replacement.

There are other possibilities, through.

We can define `enum Lrc<T> { Rc(Rc<T>), Arc(Arc<T>) }`. Or we can make `Lrc` a union and on every clone we can read from special thread-local variable. Or we can add a generic parameter to `Lrc` and, yes, this parameter will be everywhere across all codebase.

So, if you think we should take some alternative approach, then don't merge this PR. But if it is decided to stick with `Arc`, then, please, merge.

cc "Parallel Rustc Front-end" ( https://github.com/rust-lang/rust/issues/113349 )

r? SparrowLii

`@rustbot` label WG-compiler-parallel

1 files changed, 3 insertions, 3 deletions

diff --git a/compiler/rustc_parse/src/lib.rs b/compiler/rustc_parse/src/lib.rs
index e681987ff07..1a104ff5e33 100644
--- a/compiler/rustc_parse/src/lib.rs
+++ b/compiler/rustc_parse/src/lib.rs
@@ -17,12 +17,12 @@
 
 use std::path::{Path, PathBuf};
 use std::str::Utf8Error;
+use std::sync::Arc;
 
 use rustc_ast as ast;
 use rustc_ast::tokenstream::TokenStream;
 use rustc_ast::{AttrItem, Attribute, MetaItemInner, token};
 use rustc_ast_pretty::pprust;
-use rustc_data_structures::sync::Lrc;
 use rustc_errors::{Diag, EmissionGuarantee, FatalError, PResult, pluralize};
 use rustc_session::parse::ParseSess;
 use rustc_span::source_map::SourceMap;
@@ -147,7 +147,7 @@ pub fn utf8_error<E: EmissionGuarantee>(
 /// the initial token stream.
 fn new_parser_from_source_file(
     psess: &ParseSess,
-    source_file: Lrc<SourceFile>,
+    source_file: Arc<SourceFile>,
 ) -> Result<Parser<'_>, Vec<Diag<'_>>> {
     let end_pos = source_file.end_position();
     let stream = source_file_to_stream(psess, source_file, None)?;
@@ -172,7 +172,7 @@ pub fn source_str_to_stream(
 /// parsing the token stream.
 fn source_file_to_stream<'psess>(
     psess: &'psess ParseSess,
-    source_file: Lrc<SourceFile>,
+    source_file: Arc<SourceFile>,
     override_span: Option<Span>,
 ) -> Result<TokenStream, Vec<Diag<'psess>>> {
     let src = source_file.src.as_ref().unwrap_or_else(|| {