Alina Sbirlea d4b3f19ba6 [DomTree] Add constructor to create a new DT based on current DT/CFG and a set of Updates. ...

Summary:
Add the posibility of creating a new DT using a set of Updates.
This will essentially create a DT based on a CFG snapshot/view.

Additional refactoring for either this patch or follow-ups:
- create an utility for building BUI.
- replace BUI with a GraphDiff.

Reviewers: kuhar

Subscribers: sanjoy, jlebar, llvm-commits

Differential Revision: https://reviews.llvm.org/D50671

llvm-svn: 339947

2018-08-16 21:54:33 +00:00

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