[PATCH] D104989: [VPlan] Add VPReductionPHIRecipe (NFC).

[Florian Hahn via Phabricator via llvm-commits]

fhahn created this revision.
fhahn added reviewers: gilr, Ayal, rengolin.
Herald added subscribers: tschuett, psnobl, rogfer01, bollu, hiraditya.
fhahn requested review of this revision.
Herald added a subscriber: vkmr.
Herald added a project: LLVM.

This patch is a first step towards splitting up VPWidenPHIRecipe into
separate recipes for the 3 distinct cases they model:

1. reduction phis,
2. first-order recurrence phis,
3. pointer induction phis.

This allows untangling the code generation and allows us to reduce the
reliance on LoopVectorizationCostModel during VPlan code generation.

Discussed/suggested in D100102 <https://reviews.llvm.org/D100102>, D100113 <https://reviews.llvm.org/D100113>, D104197 <https://reviews.llvm.org/D104197>.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D104989

Files:
  llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
  llvm/lib/Transforms/Vectorize/VPlan.cpp
  llvm/lib/Transforms/Vectorize/VPlan.h
  llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
  llvm/lib/Transforms/Vectorize/VPlanValue.h
  llvm/test/Transforms/LoopVectorize/first-order-recurrence-sink-replicate-region.ll
  llvm/test/Transforms/LoopVectorize/vplan-printing.ll

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