Rollup merge of #61866 - sinkuu:redundant_clone, r=petrochenkov

Remove redundant `clone()`s

Author: Centril

src/librustc/infer/opaque_types/mod.rs

@@ -307,7 +307,7 @@ impl<'a, 'tcx> InferCtxt<'a, 'tcx> {
 
             let required_region_bounds = tcx.required_region_bounds(
                 opaque_type,
-                bounds.predicates.clone(),
+                bounds.predicates,
             );
             debug_assert!(!required_region_bounds.is_empty());
 

src/librustc/middle/liveness.rs

@@ -1617,7 +1617,7 @@ impl<'a, 'tcx> Liveness<'a, 'tcx> {
                     self.ir.tcx.lint_hir_note(
                         lint::builtin::UNUSED_VARIABLES,
                         hir_id,
-                        spans.clone(),
+                        spans,
                         &format!("variable `{}` is assigned to, but never used", name),
                         &format!("consider using `_{}` instead", name),
                     );

src/librustc_borrowck/borrowck/check_loans.rs

@@ -36,7 +36,7 @@ fn owned_ptr_base_path<'a, 'tcx>(loan_path: &'a LoanPath<'tcx>) -> &'a LoanPath<
 
     return match helper(loan_path) {
         Some(new_loan_path) => new_loan_path,
-        None => loan_path.clone()
+        None => loan_path,
     };
 
     fn helper<'a, 'tcx>(loan_path: &'a LoanPath<'tcx>) -> Option<&'a LoanPath<'tcx>> {

src/librustc_codegen_llvm/back/lto.rs

@@ -279,7 +279,7 @@ fn fat_lto(cgcx: &CodegenContext<LlvmCodegenBackend>,
             }
         }));
         serialized_modules.extend(cached_modules.into_iter().map(|(buffer, wp)| {
-            (buffer, CString::new(wp.cgu_name.clone()).unwrap())
+            (buffer, CString::new(wp.cgu_name).unwrap())
         }));
 
         // For all serialized bitcode files we parse them and link them in as we did

src/librustc_codegen_llvm/context.rs

@@ -459,7 +459,7 @@ impl CodegenCx<'b, 'tcx> {
         };
         let f = self.declare_cfn(name, fn_ty);
         llvm::SetUnnamedAddr(f, false);
-        self.intrinsics.borrow_mut().insert(name, f.clone());
+        self.intrinsics.borrow_mut().insert(name, f);
         f
     }
 

src/librustc_codegen_llvm/debuginfo/metadata.rs

@@ -1609,7 +1609,7 @@ impl<'tcx> VariantInfo<'tcx> {
                 // with every variant, make each variant name be just the value
                 // of the discriminant. The struct name for the variant includes
                 // the actual variant description.
-                format!("{}", variant_index.as_usize()).to_string()
+                format!("{}", variant_index.as_usize())
             }
         }
     }

src/librustc_errors/annotate_snippet_emitter_writer.rs

@@ -194,7 +194,7 @@ impl AnnotateSnippetEmitterWriter {
         let converter = DiagnosticConverter {
             source_map: self.source_map.clone(),
             level: level.clone(),
-            message: message.clone(),
+            message,
             code: code.clone(),
             msp: msp.clone(),
             children,

src/librustc_metadata/creader.rs

@@ -236,7 +236,7 @@ impl<'a> CrateLoader<'a> {
                 let host_lib = host_lib.unwrap();
                 self.load_derive_macros(
                     &host_lib.metadata.get_root(),
-                    host_lib.dylib.clone().map(|p| p.0),
+                    host_lib.dylib.map(|p| p.0),
                     span
                 )
             } else {

src/librustc_mir/build/matches/mod.rs

@@ -1737,7 +1737,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
                 pat_span,
             }))),
         };
-        let for_arm_body = self.local_decls.push(local.clone());
+        let for_arm_body = self.local_decls.push(local);
         let locals = if has_guard.0 {
             let ref_for_guard = self.local_decls.push(LocalDecl::<'tcx> {
                 // This variable isn't mutated but has a name, so has to be

src/librustc_typeck/check/wfcheck.rs

@@ -922,7 +922,7 @@ fn receiver_is_valid<'fcx, 'tcx>(
         };
 
         let obligation = traits::Obligation::new(
-            cause.clone(),
+            cause,
             fcx.param_env,
             trait_ref.to_predicate()
         );