[PATCH] D155748: [BOLT] updates for stale hashing

[Sergey Pupyrev via Phabricator via llvm-commits]

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1. Using ADT/Bitfields.h for hash computation; this is equivalent but shorter than the existing implementation
2. Getting rid of Layout indices for stale matching; using BB->getIndex for indexing


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D155748

Files:
  bolt/lib/Profile/StaleProfileMatching.cpp
  bolt/lib/Profile/YAMLProfileReader.cpp

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