[SimplifyCFG][PhaseOrdering] Defer lowering switch into an integer range comparison and branch until after at least the IPSCCP#132

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Amanieu wants to merge 2 commits intorust-lang:rustc/14.0-2022-02-09from

Amanieu:phase_ordering

Commits on Feb 26, 2022

[NFC][PhaseOrdering] Add some tests from D119839

wweiandrew
authored and
Amanieu
committed
[SimplifyCFG][PhaseOrdering] Defer lowering switch into an integer range comparison and branch until after at least the IPSCCP

LebedevRI
authored and
Amanieu
committed