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TaWeiTu 20376d1131 [LoopVersioning] Form dedicated exits for versioned loop to preserve simplify form
The exit blocks of the versioned and non-versioned loops are not dedicated and thus the two loops are not in simplify form.
Insert dummy exit blocks after loop versioning with `formDedicatedExits()` to preserve the simplify form for subsequence passes.

Reviewed By: aeubanks

Differential Revision: https://reviews.llvm.org/D89569
2020-10-24 21:40:46 +08:00
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