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Rollup merge of #83327 - tmiasko:visit-lhs, r=davidtwco

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Extend comment in `UsedLocals::visit_lhs`
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Dylan DPC 2021-03-21 02:01:40 +01:00 • committed by GitHub
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4
compiler/rustc_mir/src/transform/simplify.rs
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@ -422,7 +422,9 @@ impl UsedLocals<'tcx> {
// A use, not a definition. // A use, not a definition.
self.visit_place(place, PlaceContext::MutatingUse(MutatingUseContext::Store), location); self.visit_place(place, PlaceContext::MutatingUse(MutatingUseContext::Store), location);
} else { } 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( self.super_projection(
place.as_ref(), place.as_ref(),
PlaceContext::MutatingUse(MutatingUseContext::Projection), PlaceContext::MutatingUse(MutatingUseContext::Projection),