[PATCH] D106001: [NFC] factor out unrolling decision logic

[Geoffrey Martin-Noble via Phabricator via llvm-commits]

GMNGeoffrey added a comment.

By including <optional> this makes LLVM require C++17, which it shouldn't: https://llvm.org/docs/CodingStandards.html#c-standard-versions


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D106001/new/

https://reviews.llvm.org/D106001