[LoopUnroll] Simplify loops created by unrolling.

Summary:
Currently loop-unrolling doesn't preserve loop-simplified form. This patch
fixes it by resimplifying affected loops.

Reviewers: chandlerc, sanjoy, hfinkel

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D23148

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@278038 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed