[LoopUnroll] Simplify induction variables after peeling too.

Loop peeling also has an impact on the induction variables, so we should
benefit from induction variable simplification after peeling too.

Reviewers: sanjoy, bogner, mzolotukhin, efriedma

Reviewed By: efriedma

Differential Revision: https://reviews.llvm.org/D43878


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@328301 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed