[PATCH] D126298: [SLP]Fix PR55653: emit undefs where required, not poison.

[Alexey Bataev via Phabricator via llvm-commits]

ABataev created this revision.
ABataev added reviewers: RKSimon, fhahn, nlopes.
Herald added subscribers: vporpo, hiraditya.
Herald added a project: All.
ABataev requested review of this revision.
Herald added a project: LLVM.

Need to handle a corner case correctly, if all elements are Undefs/Poisons,
need to emit actual values, not just poisons.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D126298

Files:
  llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
  llvm/test/Transforms/SLPVectorizer/AArch64/reorder-fmuladd-crash.ll
  llvm/test/Transforms/SLPVectorizer/SystemZ/pr34619.ll
  llvm/test/Transforms/SLPVectorizer/X86/horizontal-minmax.ll
  llvm/test/Transforms/SLPVectorizer/X86/insert-shuffle.ll
  llvm/test/Transforms/SLPVectorizer/X86/jumbled-load-used-in-phi.ll
  llvm/test/Transforms/SLPVectorizer/X86/partail.ll
  llvm/test/Transforms/SLPVectorizer/X86/shrink_after_reorder.ll
  llvm/test/Transforms/SLPVectorizer/X86/shrink_after_reorder2.ll
  llvm/test/Transforms/SLPVectorizer/X86/vectorize-reorder-alt-shuffle.ll
  llvm/test/Transforms/SLPVectorizer/slp-umax-rdx-matcher-crash.ll

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