bors 6eda7642bd Auto merge of #96549 - ouz-a:mir-opt, r=oli-obk
Move Derefer before Retag

_Follow up work to #96116 #95857 #95649_

This moves `Derefer` before `Retag` and creates a new `LocalInfo` called `Temp` to avoid retagging created temp values.

Zulip discussion [link](https://rust-lang.zulipchat.com/#narrow/stream/189540-t-compiler.2Fwg-mir-opt/topic/deref.20as.20first.20and.20only.20projection)

r? `@oli-obk`
2022-05-01 15:25:16 +00:00
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