[llvm] [llvm-profdata][StaticDataLayout] Print summary of data access profiles in llvm-profdata (PR #173087)

[Teresa Johnson via llvm-commits]

https://github.com/teresajohnson commented:

> MemProfSummaryBuilder [1] is not updated, assuming it's only used for v3 and prior versions.

MemProfSummaryBuilder support is also needed for serializing the summary in v4 and above (see the writer). It's ok to defer this (I see your FIXME in the code), but maybe clarify this in the PR description?

https://github.com/llvm/llvm-project/pull/173087