[PATCH] D109762: [NewPM][SimpleLoopUnswitch] Add DivergenceInfo

[Brendon Cahoon via Phabricator via llvm-commits]

bcahoon created this revision.
bcahoon added reviewers: sameerds, asbirlea, aeubanks, arsenm.
Herald added subscribers: kerbowa, hiraditya, nhaehnle, jvesely.
bcahoon requested review of this revision.
Herald added subscribers: llvm-commits, wdng.
Herald added a project: LLVM.

Enable DivergenceAnalysis with non-trivial Simple Loop Unswitch.
Because DivergenceAnalysis is a function pass, it's not possible
to add the analysis to the pass manager pipeline when it's used
by a loop pass. This patch creates a new DivergenceInfo instance
only when needed by Simple Loop Unswitch. The PostDominatorTree
is needed as well. This adds DivergenceAnalysis when using the new
pass manager only and does not change the legacy pass manager.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D109762

Files:
  llvm/lib/Transforms/Scalar/SimpleLoopUnswitch.cpp
  llvm/test/Transforms/SimpleLoopUnswitch/AMDGPU/lit.local.cfg
  llvm/test/Transforms/SimpleLoopUnswitch/AMDGPU/nontrivial-unswitch.ll

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