[llvm] 7adb9e0 - [LoopLoadElim] Add test showing that LoopLoadElim doesn't work correctly with new PM

[Florian Hahn via llvm-commits]

> On Apr 8, 2020, at 11:32, Max Kazantsev via llvm-commits <llvm-commits at lists.llvm.org> wrote:
> 
> 
> Author: Max Kazantsev
> Date: 2020-04-08T17:32:03+07:00
> New Revision: 7adb9e06fd0dd49891e491cba9705e9dd119440e
> 
> URL: https://github.com/llvm/llvm-project/commit/7adb9e06fd0dd49891e491cba9705e9dd119440e
> DIFF: https://github.com/llvm/llvm-project/commit/7adb9e06fd0dd49891e491cba9705e9dd119440e.diff
> 
> LOG: [LoopLoadElim] Add test showing that LoopLoadElim doesn't work correctly with new PM

The problem might be that LoopSimplify is not run automatically with the new pass manager, but is with the old one. It seems like we have to manually run loopSimplify with the new pass manager, e.g. as IRCE already does: https://github.com/llvm/llvm-project/blob/master/llvm/lib/Transforms/Scalar/InductiveRangeCheckElimination.cpp#L1814