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PolyhedralInfo is tied to the legacy pass manager. With the eventual removal of the legacy pass manager it will not be useful anymore. PolyhedralInfo was an experiment to make Polly's analysis available to other passes. Its power is limited due to not being able to make assumptions for which regular Polly would emit a runtime condition/code versioning during optimization. When eventually porting such an API to the new pass manager, we will have to invent a new API.
The LLVM Compiler Infrastructure
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