Rollup merge of #131375 - klensy:clone_on_ref_ptr, r=cjgillot

compiler: apply clippy::clone_on_ref_ptr for CI

Apply lint https://rust-lang.github.io/rust-clippy/master/index.html#/clone_on_ref_ptr for compiler, also see #131225 (comment).

Some Arc's can be misplaced with Lrc's, sorry.

https://rust-lang.zulipchat.com/#narrow/channel/131828-t-compiler/topic/enable.20more.20clippy.20lints.20for.20compiler.20.28and.5Cor.20std.29

Author: workingjubilee

Cargo.lock

@@ -3301,6 +3301,7 @@ version = "0.0.0"
 dependencies = [
  "itertools",
  "rustc_ast",
+ "rustc_data_structures",
  "rustc_lexer",
  "rustc_span",
  "thin-vec",

compiler/rustc_ast/src/token.rs

@@ -368,7 +368,7 @@ 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(nt.clone()),
+            Interpolated(nt) => Interpolated(Lrc::clone(nt)),
             _ => unsafe { std::ptr::read(self) },
         }
     }

compiler/rustc_ast_lowering/src/expr.rs

@@ -3,6 +3,7 @@ use std::assert_matches::assert_matches;
 use rustc_ast::ptr::P as AstP;
 use rustc_ast::*;
 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};
@@ -143,7 +144,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
                 ExprKind::IncludedBytes(bytes) => {
                     let lit = self.arena.alloc(respan(
                         self.lower_span(e.span),
-                        LitKind::ByteStr(bytes.clone(), StrStyle::Cooked),
+                        LitKind::ByteStr(Lrc::clone(bytes), StrStyle::Cooked),
                     ));
                     hir::ExprKind::Lit(lit)
                 }
@@ -536,15 +537,15 @@ impl<'hir> LoweringContext<'_, 'hir> {
                     this.mark_span_with_reason(
                         DesugaringKind::TryBlock,
                         expr.span,
-                        Some(this.allow_try_trait.clone()),
+                        Some(Lrc::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(this.allow_try_trait.clone()),
+                    Some(Lrc::clone(&this.allow_try_trait)),
                 );
 
                 (try_span, this.expr_unit(try_span))
@@ -653,7 +654,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
                 let unstable_span = self.mark_span_with_reason(
                     DesugaringKind::Async,
                     self.lower_span(span),
-                    Some(self.allow_gen_future.clone()),
+                    Some(Lrc::clone(&self.allow_gen_future)),
                 );
                 let resume_ty =
                     self.make_lang_item_qpath(hir::LangItem::ResumeTy, unstable_span, None);
@@ -739,7 +740,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
             let unstable_span = self.mark_span_with_reason(
                 DesugaringKind::Async,
                 span,
-                Some(self.allow_gen_future.clone()),
+                Some(Lrc::clone(&self.allow_gen_future)),
             );
             self.lower_attrs(inner_hir_id, &[Attribute {
                 kind: AttrKind::Normal(ptr::P(NormalAttr::from_ident(Ident::new(
@@ -815,13 +816,13 @@ impl<'hir> LoweringContext<'_, 'hir> {
 
         let features = match await_kind {
             FutureKind::Future => None,
-            FutureKind::AsyncIterator => Some(self.allow_for_await.clone()),
+            FutureKind::AsyncIterator => Some(Lrc::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(self.allow_gen_future.clone()),
+            Some(Lrc::clone(&self.allow_gen_future)),
         );
         let expr_hir_id = expr.hir_id;
 
@@ -1841,13 +1842,13 @@ impl<'hir> LoweringContext<'_, 'hir> {
         let unstable_span = self.mark_span_with_reason(
             DesugaringKind::QuestionMark,
             span,
-            Some(self.allow_try_trait.clone()),
+            Some(Lrc::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(self.allow_try_trait.clone()),
+            Some(Lrc::clone(&self.allow_try_trait)),
         );
 
         // `Try::branch(<expr>)`
@@ -1941,7 +1942,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
         let unstable_span = self.mark_span_with_reason(
             DesugaringKind::YeetExpr,
             span,
-            Some(self.allow_try_trait.clone()),
+            Some(Lrc::clone(&self.allow_try_trait)),
         );
 
         let from_yeet_expr = self.wrap_in_try_constructor(

compiler/rustc_ast_lowering/src/lib.rs

@@ -1878,7 +1878,7 @@ 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(self.allow_async_iterator.clone()))
+                (return_impl_trait_id, Some(Lrc::clone(&self.allow_async_iterator)))
             }
         };
 

compiler/rustc_ast_lowering/src/path.rs

@@ -73,7 +73,7 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
         let bound_modifier_allowed_features = if let Res::Def(DefKind::Trait, async_def_id) = res
             && self.tcx.async_fn_trait_kind_from_def_id(async_def_id).is_some()
         {
-            Some(self.allow_async_fn_traits.clone())
+            Some(Lrc::clone(&self.allow_async_fn_traits))
         } else {
             None
         };

compiler/rustc_ast_pretty/Cargo.toml

@@ -7,6 +7,7 @@ edition = "2021"
 # tidy-alphabetical-start
 itertools = "0.12"
 rustc_ast = { path = "../rustc_ast" }
+rustc_data_structures = { path = "../rustc_data_structures" }
 rustc_lexer = { path = "../rustc_lexer" }
 rustc_span = { path = "../rustc_span" }
 thin-vec = "0.2.12"

compiler/rustc_ast_pretty/src/pprust/state.rs

@@ -21,6 +21,7 @@ use rustc_ast::{
     GenericBound, InlineAsmOperand, InlineAsmOptions, InlineAsmRegOrRegClass,
     InlineAsmTemplatePiece, PatKind, RangeEnd, RangeSyntax, Safety, SelfKind, Term, attr,
 };
+use rustc_data_structures::sync::Lrc;
 use rustc_span::edition::Edition;
 use rustc_span::source_map::{SourceMap, Spanned};
 use rustc_span::symbol::{Ident, IdentPrinter, Symbol, kw, sym};
@@ -105,7 +106,7 @@ fn split_block_comment_into_lines(text: &str, col: CharPos) -> Vec<String> {
 fn gather_comments(sm: &SourceMap, path: FileName, src: String) -> Vec<Comment> {
     let sm = SourceMap::new(sm.path_mapping().clone());
     let source_file = sm.new_source_file(path, src);
-    let text = (*source_file.src.as_ref().unwrap()).clone();
+    let text = Lrc::clone(&(*source_file.src.as_ref().unwrap()));
 
     let text: &str = text.as_str();
     let start_bpos = source_file.start_pos;

compiler/rustc_borrowck/src/nll.rs

@@ -107,13 +107,13 @@ pub(crate) fn compute_regions<'a, 'tcx>(
             param_env,
             body,
             promoted,
-            universal_regions.clone(),
+            Rc::clone(&universal_regions),
             location_table,
             borrow_set,
             &mut all_facts,
             flow_inits,
             move_data,
-            elements.clone(),
+            Rc::clone(&elements),
             upvars,
         );
 

compiler/rustc_borrowck/src/region_infer/mod.rs

@@ -733,7 +733,7 @@ impl<'tcx> RegionInferenceContext<'tcx> {
         }
 
         // Now take member constraints into account.
-        let member_constraints = self.member_constraints.clone();
+        let member_constraints = Rc::clone(&self.member_constraints);
         for m_c_i in member_constraints.indices(scc_a) {
             self.apply_member_constraint(scc_a, m_c_i, member_constraints.choice_regions(m_c_i));
         }
@@ -1679,7 +1679,7 @@ impl<'tcx> RegionInferenceContext<'tcx> {
         infcx: &InferCtxt<'tcx>,
         errors_buffer: &mut RegionErrors<'tcx>,
     ) {
-        let member_constraints = self.member_constraints.clone();
+        let member_constraints = Rc::clone(&self.member_constraints);
         for m_c_i in member_constraints.all_indices() {
             debug!(?m_c_i);
             let m_c = &member_constraints[m_c_i];

compiler/rustc_borrowck/src/type_check/mod.rs

@@ -134,7 +134,7 @@ pub(crate) fn type_check<'a, 'tcx>(
     let mut constraints = MirTypeckRegionConstraints {
         placeholder_indices: PlaceholderIndices::default(),
         placeholder_index_to_region: IndexVec::default(),
-        liveness_constraints: LivenessValues::with_specific_points(elements.clone()),
+        liveness_constraints: LivenessValues::with_specific_points(Rc::clone(&elements)),
         outlives_constraints: OutlivesConstraintSet::default(),
         member_constraints: MemberConstraintSet::default(),
         type_tests: Vec::default(),
@@ -150,7 +150,7 @@ pub(crate) fn type_check<'a, 'tcx>(
         infcx,
         param_env,
         implicit_region_bound,
-        universal_regions.clone(),
+        Rc::clone(&universal_regions),
         &mut constraints,
     );