LoopInterchange relies on LoopInfo being up-to-date, so we should
preserve it after interchanging. This patch updates restructureLoops to
move the BBs of the interchanged loops to the right place.
Reviewers: davide, efriedma, karthikthecool, mcrosier
Reviewed By: efriedma
Differential Revision: https://reviews.llvm.org/D45278
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@329264 91177308-0d34-0410-b5e6-96231b3b80d8
I have taken the opportunity to simplify some tests slightly and move
parts around.
It also brings back a few IR checks for interchangable loops.
Reviewers: karthikthecool, sebpop, grosser
Reviewed By: sebpop
Differential Revision: https://reviews.llvm.org/D45207
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@329081 91177308-0d34-0410-b5e6-96231b3b80d8
