[PATCH] D71538: [SCEVExpander] Preserve LCSSA directly (WIP).

[Florian Hahn via Phabricator via llvm-commits]

fhahn created this revision.
Herald added subscribers: javed.absar, hiraditya.
Herald added a project: LLVM.

Teach SCEVExpander to preserve LCSSA during expansion.

This patch is WIP and needs more cleanup.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D71538

Files:
  llvm/include/llvm/Transforms/Utils/LoopUtils.h
  llvm/include/llvm/Transforms/Utils/ScalarEvolutionExpander.h
  llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp
  llvm/lib/Transforms/Utils/LCSSA.cpp
  llvm/lib/Transforms/Utils/ScalarEvolutionExpander.cpp
  llvm/test/Transforms/IndVarSimplify/scev-expander-lcssa-2.ll
  llvm/test/Transforms/IndVarSimplify/scev-expander-lcssa-3.ll
  llvm/test/Transforms/IndVarSimplify/scev-expander-lcssa-4.ll
  llvm/test/Transforms/IndVarSimplify/scev-expander-lcssa.ll
  llvm/test/Transforms/LoopStrengthReduce/scev-expander-lcssa.ll
  llvm/unittests/Transforms/Utils/ScalarEvolutionExpanderTest.cpp

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