[llvm] [Object] Parsing and dumping of SFrame Frame Row Entries (PR #151301)

[Pavel Labath via llvm-commits]

labath wrote:

@dwblaikie, @efriedma-quic, I am tagging you because you were involved in the DataExtractor-vs-reinterpret_cast discussion.

@jh7370, I am also going to be out for the rest of this week, so there's no rush. I appreciate all your reviews so far.

https://github.com/llvm/llvm-project/pull/151301