[XRay] A tool for Comparing xray function call graphs
Summary:
This is a tool for comparing the function graphs produced by the
llvm-xray graph too. It takes the form of a new subcommand of the
llvm-xray tool 'graph-diff'.
This initial version of the patch is very rough, but it is close to
feature complete.
Depends on D29363
Reviewers: dblaikie, dberris
Reviewed By: dberris
Subscribers: mgorny, llvm-commits
Differential Revision: https://reviews.llvm.org/D29320
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@301160
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