[PATCH] D96036: [clang][codegen] Remember string used to create llvm::Regex for optimization remarks

[Jan Svoboda via Phabricator via cfe-commits]

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Regular expression patterns passed through the command line are being used to create an instances of `llvm::Regex` and thrown away.

There is no API to serialize `Regex` back to the original pattern. This means we have no way to reconstruct the original pattern from command line. This is necessary for serializing `CompilerInvocation`.

This patch stores the original pattern string in `CodeGenOptions` alongside the `llvm::Regex` instance.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D96036

Files:
  clang/include/clang/Basic/CodeGenOptions.h
  clang/lib/CodeGen/CodeGenAction.cpp
  clang/lib/Frontend/CompilerInvocation.cpp

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