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resolve: Do not create unnecessary ParentScope when building external modules

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This commit is contained in:
Vadim Petrochenkov
2026-02-17 20:01:21 +03:00
parent e22c616e4e
commit 38c14f301d
1 changed files with 4 additions and 6 deletions
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compiler/rustc_resolve/src/build_reduced_graph.rs
+4 -6
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@@ -251,16 +251,15 @@ pub(crate) fn build_reduced_graph(
pub(crate) fn build_reduced_graph_external(&self, module: ExternModule<'ra>) {
let def_id = module.def_id();
let children = self.tcx.module_children(def_id);
let parent_scope = ParentScope::module(module.to_module(), self.arenas);
for (i, child) in children.iter().enumerate() {
self.build_reduced_graph_for_external_crate_res(child, parent_scope, i, None)
self.build_reduced_graph_for_external_crate_res(child, module, i, None)
}
for (i, child) in
self.cstore().ambig_module_children_untracked(self.tcx, def_id).enumerate()
{
self.build_reduced_graph_for_external_crate_res(
&child.main,
parent_scope,
module,
children.len() + i,
Some(&child.second),
)
@@ -271,11 +270,10 @@ pub(crate) fn build_reduced_graph_external(&self, module: ExternModule<'ra>) {
fn build_reduced_graph_for_external_crate_res(
&self,
child: &ModChild,
parent_scope: ParentScope<'ra>,
parent: ExternModule<'ra>,
child_index: usize,
ambig_child: Option<&ModChild>,
) {
let parent = parent_scope.module.expect_extern();
let child_span = |this: &Self, reexport_chain: &[Reexport], res: def::Res<_>| {
this.def_span(
reexport_chain
@@ -288,7 +286,7 @@ fn build_reduced_graph_for_external_crate_res(
let ident = IdentKey::new(orig_ident);
let span = child_span(self, reexport_chain, res);
let res = res.expect_non_local();
let expansion = parent_scope.expansion;
let expansion = LocalExpnId::ROOT;
let ambig = ambig_child.map(|ambig_child| {
let ModChild { ident: _, res, vis, ref reexport_chain } = *ambig_child;
let span = child_span(self, reexport_chain, res);