[PATCH] D142886: [VPlan] Switch to checking sinking legality for recurrences in VPlan.

[Florian Hahn via Phabricator via llvm-commits]

fhahn created this revision.
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Building on D142885 <https://reviews.llvm.org/D142885> and D142589 <https://reviews.llvm.org/D142589>, retire the SinkAfter map from the
recurrence handling code. It is replaced by checking whether it is
possible to sink all users of a recurrence directly in VPlan. This
results in simpler code overall and allows to handle additional cases
(see the improvements in @test_crash).

Depends on D142885 <https://reviews.llvm.org/D142885>.
Depends on D142589 <https://reviews.llvm.org/D142589>.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D142886

Files:
  llvm/include/llvm/Analysis/IVDescriptors.h
  llvm/include/llvm/Transforms/Vectorize/LoopVectorizationLegality.h
  llvm/lib/Analysis/IVDescriptors.cpp
  llvm/lib/Transforms/Vectorize/LoopVectorizationLegality.cpp
  llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
  llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
  llvm/lib/Transforms/Vectorize/VPlanTransforms.h
  llvm/test/Transforms/LoopVectorize/first-order-recurrence-chains.ll

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