[PATCH] D146273: [RISCV] Simplify RISCVISAInfo::compareExtension. NFCI

[Craig Topper via Phabricator via llvm-commits]

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Instead of having a separate single letter and multiletter ranking
use a unified rank that assigns multiletter a larger value than
single letter.

Once we've ranked the extensions, then we compare using these ranks.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D146273

Files:
  llvm/lib/Support/RISCVISAInfo.cpp

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