[PATCH] D21987: [XRay] Implement `llvm-xray extract`, start of the llvm-xray tool

[Dean Michael Berris via llvm-commits]

dberris added a comment.

Thanks @dblaikie -- PTAL



> dblaikie wrote in extract-instrmap.ll:5-6
> Do we need both yaml and json? If this is only for testing purposes, seems one would suffice? (is this for other purposes?)

JSON is convenient but not strictly required. Removed.

https://reviews.llvm.org/D21987