[PATCH] D142181: [OptTable] Store llvm::cl::Option into a DenseMap instead of a StringMap

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StringMap are useful when we need to duplicate the key's memory. That's
not the case for llvm:🆑:Option because the keys are StringLiteral.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D142181

Files:
  llvm/include/llvm/Support/CommandLine.h
  llvm/lib/CodeGen/TargetPassConfig.cpp
  llvm/lib/Support/CommandLine.cpp
  llvm/unittests/Support/CommandLineInit/CommandLineInitTest.cpp
  llvm/unittests/Support/CommandLineTest.cpp

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