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Rollup merge of #82091 - henryboisdequin:use-place-ref-more, r=RalfJung

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use PlaceRef abstractions more consistently

Addresses this [comment](https://github.com/rust-lang/rust/pull/80865/files#r558978715)
Associated issue: #80647

r? ```@RalfJung```
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Dylan DPC 2021-02-23 02:51:50 +01:00 • committed by GitHub
commit cc07061190
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5 changed files with 22 additions and 23 deletions
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compiler/rustc_mir/src/dataflow/impls/liveness.rs
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@ -95,7 +95,7 @@ where
// We purposefully do not call `super_place` here to avoid calling `visit_local` for this
// place with one of the `Projection` variants of `PlaceContext`.
self.visit_projection(local, projection, context, location);
self.visit_projection(place.as_ref(), context, location);
match DefUse::for_place(context) {
// Treat derefs as a use of the base local. `*p = 4` is not a def of `p` but a use.