[PATCH] D159200: [VPlan] Fold (MUL A, 1) -> A as VPlan2VPlan transform.

[Florian Hahn via Phabricator via llvm-commits]

fhahn created this revision.
fhahn added reviewers: Ayal, gilr, rengolin, peixin.
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Add first VPlan-based recipe simplification to fold (MUL A, 1) -> A.
Among other things, this enables additional simplifications after
applying versioned strides, as follow up to D147783 <https://reviews.llvm.org/D147783>.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D159200

Files:
  llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
  llvm/test/Transforms/LoopVectorize/ARM/mve-gather-scatter-tailpred.ll
  llvm/test/Transforms/LoopVectorize/RISCV/strided-accesses.ll
  llvm/test/Transforms/LoopVectorize/runtime-check-needed-but-empty.ll

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