[PERF] allow region unification to change region universes#108867

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aliemjay wants to merge 4 commits intorust-lang:masterfrom

aliemjay:resolve-var-region-alt

Commits on Mar 6, 2023

account for universes in region unification
aliemjay
committed

Commits on Mar 7, 2023

Commits on Mar 8, 2023

pacify tidy
aliemjay
authored