[CloneFunction] Preserve DT in DuplicateInstructionsInSplitBetween.

DuplicateInstructionsInSplitBetween can preserve the DT by passing
through DT to SplitEdge.

Reviewers: sanjoy, junbuml, anna, kuhar

Reviewed By: kuhar

Differential Revision: https://reviews.llvm.org/D44629


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@328189 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed