[PATCH] D108476: [runtimeunroll] Support epilogue unrolling with a parent loop

[Philip Reames via Phabricator via llvm-commits]

reames created this revision.
reames added reviewers: nikic, fhahn, anna.
Herald added subscribers: zzheng, bollu, hiraditya, mcrosier.
reames requested review of this revision.
Herald added a project: LLVM.

This patch adds support for unrolling inner loops using epilogue unrolling.  Specifically, it handles the case where we use a remainder *loop*.  If we use a remainder *block* (e.g. break the backedge when Count == 2), there's more work needed so that case is excluded from this patch.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D108476

Files:
  llvm/lib/Transforms/Utils/LoopUnrollRuntime.cpp
  llvm/test/Transforms/LoopUnroll/runtime-loop-multiple-exits.ll

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