use slice::contains where applicable

compiler/rustc_builtin_macros/src/edition_panic.rs

@@ -74,11 +74,11 @@ pub(crate) fn use_panic_2021(mut span: Span) -> bool {
     // (To avoid using the edition of e.g. the assert!() or debug_assert!() definition.)
     loop {
         let expn = span.ctxt().outer_expn_data();
-        if let Some(features) = expn.allow_internal_unstable {
-            if features.iter().any(|&f| f == sym::edition_panic) {
-                span = expn.call_site;
-                continue;
-            }
+        if let Some(features) = expn.allow_internal_unstable
+            && features.contains(&sym::edition_panic)
+        {
+            span = expn.call_site;
+            continue;
         }
         break expn.edition >= Edition::Edition2021;
     }

compiler/rustc_codegen_ssa/src/back/write.rs

@@ -2186,7 +2186,7 @@ fn msvc_imps_needed(tcx: TyCtxt<'_>) -> bool {
     // indirectly from ThinLTO. In theory these are not needed as ThinLTO could resolve
     // these, but it currently does not do so.
     let can_have_static_objects =
-        tcx.sess.lto() == Lto::Thin || tcx.crate_types().iter().any(|ct| *ct == CrateType::Rlib);
+        tcx.sess.lto() == Lto::Thin || tcx.crate_types().contains(&CrateType::Rlib);
 
     tcx.sess.target.is_like_windows &&
     can_have_static_objects   &&

compiler/rustc_codegen_ssa/src/codegen_attrs.rs

@@ -604,7 +604,7 @@ fn codegen_fn_attrs(tcx: TyCtxt<'_>, did: LocalDefId) -> CodegenFnAttrs {
     if let Some((name, _)) = lang_items::extract(attrs)
         && let Some(lang_item) = LangItem::from_name(name)
     {
-        if WEAK_LANG_ITEMS.iter().any(|&l| l == lang_item) {
+        if WEAK_LANG_ITEMS.contains(&lang_item) {
             codegen_fn_attrs.flags |= CodegenFnAttrFlags::RUSTC_STD_INTERNAL_SYMBOL;
         }
         if let Some(link_name) = lang_item.link_name() {

compiler/rustc_mir_build/src/builder/scope.rs

@@ -1496,7 +1496,7 @@ fn build_scope_drops<'tcx>(
                 // path, then don't generate the drop. (We only take this into
                 // account for non-unwind paths so as not to disturb the
                 // caching mechanism.)
-                if scope.moved_locals.iter().any(|&o| o == local) {
+                if scope.moved_locals.contains(&local) {
                     continue;
                 }
 

compiler/rustc_passes/src/entry.rs

@@ -24,7 +24,7 @@ struct EntryContext<'tcx> {
 }
 
 fn entry_fn(tcx: TyCtxt<'_>, (): ()) -> Option<(DefId, EntryFnType)> {
-    let any_exe = tcx.crate_types().iter().any(|ty| *ty == CrateType::Executable);
+    let any_exe = tcx.crate_types().contains(&CrateType::Executable);
     if !any_exe {
         // No need to find a main function.
         return None;

compiler/rustc_session/src/utils.rs

@@ -149,14 +149,15 @@ pub fn extra_compiler_flags() -> Option<(Vec<String>, bool)> {
                 arg[a.len()..].to_string()
             };
             let option = content.split_once('=').map(|s| s.0).unwrap_or(&content);
-            if ICE_REPORT_COMPILER_FLAGS_EXCLUDE.iter().any(|exc| option == *exc) {
+            if ICE_REPORT_COMPILER_FLAGS_EXCLUDE.contains(&option) {
                 excluded_cargo_defaults = true;
             } else {
                 result.push(a.to_string());
-                match ICE_REPORT_COMPILER_FLAGS_STRIP_VALUE.iter().find(|s| option == **s) {
-                    Some(s) => result.push(format!("{s}=[REDACTED]")),
-                    None => result.push(content),
-                }
+                result.push(if ICE_REPORT_COMPILER_FLAGS_STRIP_VALUE.contains(&option) {
+                    format!("{option}=[REDACTED]")
+                } else {
+                    content
+                });
             }
         }
     }

compiler/rustc_span/src/lib.rs

@@ -876,7 +876,7 @@ impl Span {
         self.ctxt()
             .outer_expn_data()
             .allow_internal_unstable
-            .is_some_and(|features| features.iter().any(|&f| f == feature))
+            .is_some_and(|features| features.contains(&feature))
     }
 
     /// Checks if this span arises from a compiler desugaring of kind `kind`.