45f6036533
https://github.com/llvm/llvm-project/pull/138170 introduces classes to operate on data access profiles. This change supports the read and write of `DataAccessProfData` in indexed format of MemProf (v4) as well as its the text (yaml) format. For indexed format: * InstrProfWriter owns (by `std::unique_ptr<DataAccessProfData>`) the data access profiles, and gives a non-owned copy when it calls `writeMemProf`. * MemProf v4 header has a new `uint64_t` to record the byte offset of data access profiles. This `uint64_t` field is zero if data access profile is not set (nullptr). * MemProfReader reads the offset from v4 header and de-serializes in-memory bytes into class `DataAccessProfData`. For textual format: * MemProfYAML.h adds the mapping for DAP class, and make DAP optional for both read and write. 099a0fa (by @snehasish) introduces v4 which contains CalleeGuids in CallSiteInfo, and this change changes the v4 format in place with data access profiles. The current plan is to bump the version and enable v4 profiles with both features, assuming waiting for this change won't delay the callsite change too long. --------- Co-authored-by: Kazu Hirata <kazu@google.com>
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