[PATCH] D118051: [VPlan] Remove dead header-phi recipes.

[Florian Hahn via Phabricator via llvm-commits]

fhahn created this revision.
fhahn added reviewers: Ayal, gilr, 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 adds a new transform to remove dead recipes. For now, it only
removes dead header-phi recipes, to keep the number tests that require
updating manageable. Future patches will extend this to remove dead
recipes across the whole plan.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D118051

Files:
  llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
  llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
  llvm/lib/Transforms/Vectorize/VPlanTransforms.h
  llvm/test/Transforms/LoopVectorize/AArch64/sve-widen-gep.ll
  llvm/test/Transforms/LoopVectorize/ARM/tail-folding-scalar-epilogue-fallback.ll
  llvm/test/Transforms/LoopVectorize/X86/cost-model-assert.ll
  llvm/test/Transforms/LoopVectorize/X86/small-size.ll
  llvm/test/Transforms/LoopVectorize/X86/uniform_mem_op.ll
  llvm/test/Transforms/LoopVectorize/first-order-recurrence-sink-replicate-region.ll
  llvm/test/Transforms/LoopVectorize/first-order-recurrence.ll
  llvm/test/Transforms/LoopVectorize/if-pred-stores.ll
  llvm/test/Transforms/LoopVectorize/induction.ll
  llvm/test/Transforms/LoopVectorize/pointer-induction.ll
  llvm/test/Transforms/LoopVectorize/pr44488-predication.ll
  llvm/test/Transforms/LoopVectorize/pr46525-expander-insertpoint.ll
  llvm/test/Transforms/LoopVectorize/pr47343-expander-lcssa-after-cfg-update.ll
  llvm/test/Transforms/LoopVectorize/select-reduction.ll
  llvm/test/Transforms/LoopVectorize/uniform-blend.ll
  llvm/test/Transforms/LoopVectorize/use-scalar-epilogue-if-tp-fails.ll
  llvm/test/Transforms/LoopVectorize/vplan-sink-scalars-and-merge-vf1.ll
  llvm/test/Transforms/LoopVectorize/vplan-sink-scalars-and-merge.ll

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