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This PR is an implementation for changes proposed in https://discourse.llvm.org/t/rfc-distinguish-between-data-and-non-data-in-fir-alias-analysis/78759 Test updates were made when the query was on the wrong reference. So, it is my hope that this will clear ambiguity on the nature of the queries from here on. There are also some TODOs that were addressed. It also partly implements what https://github.com/llvm/llvm-project/pull/87723 is attempting to accomplish. At least, on a point-to-point query between references, the distinction is made. To apply it to TBAA, would be another PR. Note that, the changes were minimal in the TBAA code to retain the current results.