[PATCH] D152320: [llvm-profdata] Use StringRef in place of string in FunctionSamplesMap

[William Junda Huang via Phabricator via llvm-commits]

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Use StringRef instead of a string in FunctionSamplesMap's key type, because all usages of it are backed by the data of a sample profile, or sourced from a function name in the IR. It is necessary to change all usages of string into StringRef inside a SampleProfileMap to implement the 2nd phase of MD5 function name refactoring (by comparing MD5 values directly, instead of changing it to a string first)


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D152320

Files:
  llvm/include/llvm/ProfileData/SampleProf.h
  llvm/lib/ProfileData/SampleProf.cpp
  llvm/lib/ProfileData/SampleProfReader.cpp
  llvm/tools/llvm-profdata/llvm-profdata.cpp
  llvm/tools/llvm-profgen/ProfileGenerator.cpp
  llvm/unittests/ProfileData/SampleProfTest.cpp

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