bjoernager/rust
bjoernager/rust
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Add fast path without visiting.

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This commit is contained in:
Camille GILLOT 2022-09-30 08:22:50 +02:00
parent e78dd6d781
commit c2d5dd2566
1 changed files with 30 additions and 12 deletions
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42
compiler/rustc_lint/src/levels.rs
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@ -135,6 +135,7 @@ fn lint_expectations(tcx: TyCtxt<'_>, (): ()) -> Vec<(LintExpectationId, LintExp
#[instrument(level = "trace", skip(tcx), ret)]
fn shallow_lint_levels_on(tcx: TyCtxt<'_>, owner: hir::OwnerId) -> ShallowLintLevelMap {
let store = unerased_lint_store(tcx);
let attrs = tcx.hir_attrs(owner);
let mut levels = LintLevelsBuilder {
sess: tcx.sess,
@ -143,23 +144,35 @@ fn shallow_lint_levels_on(tcx: TyCtxt<'_>, owner: hir::OwnerId) -> ShallowLintLe
cur: owner.into(),
specs: ShallowLintLevelMap::default(),
empty: FxHashMap::default(),
attrs,
},
warn_about_weird_lints: false,
store,
registered_tools: &tcx.resolutions(()).registered_tools,
};
match tcx.hir().expect_owner(owner) {
hir::OwnerNode::Item(item) => levels.visit_item(item),
hir::OwnerNode::ForeignItem(item) => levels.visit_foreign_item(item),
hir::OwnerNode::TraitItem(item) => levels.visit_trait_item(item),
hir::OwnerNode::ImplItem(item) => levels.visit_impl_item(item),
hir::OwnerNode::Crate(mod_) => {
levels.add_command_line();
levels.add_id(hir::CRATE_HIR_ID);
levels.visit_mod(mod_, mod_.spans.inner_span, hir::CRATE_HIR_ID)
}
};
if owner == hir::CRATE_OWNER_ID {
levels.add_command_line();
}
match attrs.map.range(..) {
// There is only something to do if there are attributes at all.
[] => {}
// Most of the time, there is only one attribute. Avoid fetching HIR in that case.
[(local_id, _)] => levels.add_id(HirId { owner, local_id: *local_id }),
// Otherwise, we need to visit the attributes in source code order, so we fetch HIR and do
// a standard visit.
_ => match tcx.hir().expect_owner(owner) {
hir::OwnerNode::Item(item) => levels.visit_item(item),
hir::OwnerNode::ForeignItem(item) => levels.visit_foreign_item(item),
hir::OwnerNode::TraitItem(item) => levels.visit_trait_item(item),
hir::OwnerNode::ImplItem(item) => levels.visit_impl_item(item),
hir::OwnerNode::Crate(mod_) => {
levels.add_id(hir::CRATE_HIR_ID);
levels.visit_mod(mod_, mod_.spans.inner_span, hir::CRATE_HIR_ID)
}
},
}
let mut specs = levels.provider.specs;
specs.specs.retain(|(_, v)| !v.is_empty());
@ -199,6 +212,7 @@ struct LintLevelQueryMap<'tcx> {
specs: ShallowLintLevelMap,
/// Empty hash map to simplify code.
empty: FxHashMap<LintId, LevelAndSource>,
attrs: &'tcx hir::AttributeMap<'tcx>,
}
impl LintLevelsProvider for LintLevelQueryMap<'_> {
@ -253,7 +267,11 @@ impl LintLevelsProvider for QueryMapExpectationsWrapper<'_> {
impl<'tcx> LintLevelsBuilder<'_, LintLevelQueryMap<'tcx>> {
fn add_id(&mut self, hir_id: HirId) {
self.provider.cur = hir_id;
self.add(self.provider.tcx.hir().attrs(hir_id), hir_id == hir::CRATE_HIR_ID, Some(hir_id));
self.add(
self.provider.attrs.get(hir_id.local_id),
hir_id == hir::CRATE_HIR_ID,
Some(hir_id),
);
}
}