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avoid fetching HIR when handling Impl assoc items

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Signed-off-by: Miguel Guarniz <mi9uel9@gmail.com>
This commit is contained in:
Miguel Guarniz 2022-05-12 11:34:37 -04:00
parent f1c256d168
commit 959636d531
1 changed files with 18 additions and 12 deletions
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30
compiler/rustc_passes/src/dead.rs
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@ -511,18 +511,24 @@ fn check_item<'tcx>(
}
}
DefKind::Impl => {
let item = tcx.hir().item(id);
if let hir::ItemKind::Impl(hir::Impl { ref of_trait, items, .. }) = item.kind {
if of_trait.is_some() {
worklist.push(item.def_id);
}
for impl_item_ref in *items {
let impl_item = tcx.hir().impl_item(impl_item_ref.id);
if of_trait.is_some()
|| has_allow_dead_code_or_lang_attr(tcx, impl_item.hir_id())
{
worklist.push(impl_item_ref.id.def_id);
}
let of_trait = tcx.impl_trait_ref(id.def_id);
if of_trait.is_some() {
worklist.push(id.def_id);
}
// get DefIds from another query
let local_def_ids = tcx
.associated_item_def_ids(id.def_id)
.iter()
.filter_map(|def_id| def_id.as_local());
// And we access the Map here to get HirId from LocalDefId
for id in local_def_ids {
if of_trait.is_some()
|| has_allow_dead_code_or_lang_attr(tcx, tcx.hir().local_def_id_to_hir_id(id))
{
worklist.push(id);
}
}
}