[clang] [flang] [llvm] [polly] [Plugins] Pass options to a pass plugin in -load-pass-plugin (PR #226773)

[Fangrui Song via llvm-commits]

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MaskRay wrote:

Agreed. Added `Error (*ParseArguments)(ArrayRef<const char *> Args) = nullptr;` and bumped `LLVM_PLUGIN_API_VERSION`.

https://github.com/llvm/llvm-project/pull/226773