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Introduce UnordMap, UnordSet, and UnordBag (see MCP 533)

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MCP 533: https://github.com/rust-lang/compiler-team/issues/533

Also, as an example, substitute UnordMap for FxHashMap in
used_trait_imports query result.
This commit is contained in:
Michael Woerister 2022-10-27 13:23:26 +00:00
parent 43dd3d514b
commit 9117ea9758
10 changed files with 400 additions and 12 deletions
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7
compiler/rustc_hir_analysis/src/check_unused.rs
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@ -1,5 +1,6 @@
use crate::errors::{ExternCrateNotIdiomatic, UnusedExternCrate};
use rustc_data_structures::fx::{FxHashMap, FxHashSet};
use rustc_data_structures::fx::FxHashMap;
use rustc_data_structures::unord::UnordSet;
use rustc_hir as hir;
use rustc_hir::def::DefKind;
use rustc_hir::def_id::{DefId, LocalDefId};
@ -8,12 +9,12 @@ use rustc_session::lint;
use rustc_span::{Span, Symbol};
pub fn check_crate(tcx: TyCtxt<'_>) {
let mut used_trait_imports: FxHashSet<LocalDefId> = FxHashSet::default();
let mut used_trait_imports: UnordSet<LocalDefId> = Default::default();
for item_def_id in tcx.hir().body_owners() {
let imports = tcx.used_trait_imports(item_def_id);
debug!("GatherVisitor: item_def_id={:?} with imports {:#?}", item_def_id, imports);
used_trait_imports.extend(imports.iter());
used_trait_imports.extend(imports.items().copied());
}
for &id in tcx.maybe_unused_trait_imports(()) {