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Extend comment in UsedLocals::visit_lhs #83327

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Mar 21, 2021
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Extend comment in UsedLocals::visit_lhs #83327

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4 changes: 3 additions & 1 deletion compiler/rustc_mir/src/transform/simplify.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -422,7 +422,9 @@ impl UsedLocals<'tcx> {
// A use, not a definition.
self.visit_place(place, PlaceContext::MutatingUse(MutatingUseContext::Store), location);
} else {
// A definition. Although, it still might use other locals for indexing.
// A definition. The base local itself is not visited, so this occurrence is not counted
// toward its use count. There might be other locals still, used in an indexing
// projection.
self.super_projection(
place.as_ref(),
PlaceContext::MutatingUse(MutatingUseContext::Projection),
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