Jingu Kang f3a27511c9 [SimpleLoopUnswitch] Port partially invariant unswitch from LoopUnswitch to SimpleLoopUnswitch
This re-enables commit 107d19eb017ff6734986af077eb2e9f6600114a9 with bug fixes.

Differential Revision: https://reviews.llvm.org/D99354
2021-06-02 10:58:22 +01:00
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