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

2 files changed, 7 insertions, 6 deletions

diff --git a/compiler/rustc_codegen_ssa/src/base.rs b/compiler/rustc_codegen_ssa/src/base.rs
index df945920ee8..d9fbf539fd3 100644
--- a/compiler/rustc_codegen_ssa/src/base.rs
+++ b/compiler/rustc_codegen_ssa/src/base.rs
@@ -1,5 +1,6 @@
 use std::cmp;
 use std::collections::BTreeSet;
+use std::sync::Arc;
 use std::time::{Duration, Instant};
 
 use itertools::Itertools;
@@ -7,7 +8,7 @@ use rustc_abi::FIRST_VARIANT;
 use rustc_ast::expand::allocator::{ALLOCATOR_METHODS, AllocatorKind, global_fn_name};
 use rustc_data_structures::fx::{FxHashMap, FxIndexSet};
 use rustc_data_structures::profiling::{get_resident_set_size, print_time_passes_entry};
-use rustc_data_structures::sync::{Lrc, par_map};
+use rustc_data_structures::sync::par_map;
 use rustc_data_structures::unord::UnordMap;
 use rustc_hir::def_id::{DefId, LOCAL_CRATE};
 use rustc_hir::lang_items::LangItem;
@@ -932,7 +933,7 @@ impl CrateInfo {
             crate_name: UnordMap::with_capacity(n_crates),
             used_crates,
             used_crate_source: UnordMap::with_capacity(n_crates),
-            dependency_formats: Lrc::clone(tcx.dependency_formats(())),
+            dependency_formats: Arc::clone(tcx.dependency_formats(())),
             windows_subsystem,
             natvis_debugger_visualizers: Default::default(),
             lint_levels: CodegenLintLevels::from_tcx(tcx),
@@ -946,7 +947,7 @@ impl CrateInfo {
             info.crate_name.insert(cnum, tcx.crate_name(cnum));
 
             let used_crate_source = tcx.used_crate_source(cnum);
-            info.used_crate_source.insert(cnum, Lrc::clone(used_crate_source));
+            info.used_crate_source.insert(cnum, Arc::clone(used_crate_source));
             if tcx.is_profiler_runtime(cnum) {
                 info.profiler_runtime = Some(cnum);
             }
diff --git a/compiler/rustc_codegen_ssa/src/lib.rs b/compiler/rustc_codegen_ssa/src/lib.rs
index 40299ae2630..428a45975f1 100644
--- a/compiler/rustc_codegen_ssa/src/lib.rs
+++ b/compiler/rustc_codegen_ssa/src/lib.rs
@@ -24,10 +24,10 @@
 use std::collections::BTreeSet;
 use std::io;
 use std::path::{Path, PathBuf};
+use std::sync::Arc;
 
 use rustc_ast as ast;
 use rustc_data_structures::fx::{FxHashSet, FxIndexMap};
-use rustc_data_structures::sync::Lrc;
 use rustc_data_structures::unord::UnordMap;
 use rustc_hir::CRATE_HIR_ID;
 use rustc_hir::def_id::CrateNum;
@@ -200,9 +200,9 @@ pub struct CrateInfo {
     pub native_libraries: FxIndexMap<CrateNum, Vec<NativeLib>>,
     pub crate_name: UnordMap<CrateNum, Symbol>,
     pub used_libraries: Vec<NativeLib>,
-    pub used_crate_source: UnordMap<CrateNum, Lrc<CrateSource>>,
+    pub used_crate_source: UnordMap<CrateNum, Arc<CrateSource>>,
     pub used_crates: Vec<CrateNum>,
-    pub dependency_formats: Lrc<Dependencies>,
+    pub dependency_formats: Arc<Dependencies>,
     pub windows_subsystem: Option<String>,
     pub natvis_debugger_visualizers: BTreeSet<DebuggerVisualizerFile>,
     pub lint_levels: CodegenLintLevels,