[llvm] Adding Matching and Inference Functionality to Propeller-PR4: Implement matching and inference and create clusters (PR #167622)

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+; BB cluster section tests when using edges profile and basic block hashes to generate clusters.
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wdx727 wrote:

Done. We added comments describing the case execution flow and the role of basic block hash.

https://github.com/llvm/llvm-project/pull/167622