[PATCH] D105275: [SLP]Fix gathering of the scalars by not ignoring UndefValues.

[Alexey Bataev via Phabricator via llvm-commits]

ABataev created this revision.
ABataev added reviewers: RKSimon, spatel, vdmitrie, dtemirbulatov, anton-afanasyev, Carrot, rupprecht.
Herald added a subscriber: hiraditya.
ABataev requested review of this revision.
Herald added a project: LLVM.

The compiler should not ignore UndefValue when gathering the scalars,
otherwise the resulting code may be less defined than the original one.
Also, grouped scalars to insert them at first to reduce the analysis in
further passes.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D105275

Files:
  llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
  llvm/test/Transforms/SLPVectorizer/AArch64/insertelement-inseltpoison.ll
  llvm/test/Transforms/SLPVectorizer/AArch64/insertelement.ll
  llvm/test/Transforms/SLPVectorizer/AArch64/trunc-insertion.ll
  llvm/test/Transforms/SLPVectorizer/X86/crash_exceed_scheduling.ll
  llvm/test/Transforms/SLPVectorizer/X86/crash_lencod.ll
  llvm/test/Transforms/SLPVectorizer/X86/crash_mandeltext.ll
  llvm/test/Transforms/SLPVectorizer/X86/crash_smallpt.ll
  llvm/test/Transforms/SLPVectorizer/X86/geps-non-pow-2.ll
  llvm/test/Transforms/SLPVectorizer/X86/phi3.ll
  llvm/test/Transforms/SLPVectorizer/X86/phi_landingpad.ll
  llvm/test/Transforms/SLPVectorizer/X86/pr35497.ll
  llvm/test/Transforms/SLPVectorizer/X86/reorder_repeated_ops.ll
  llvm/test/Transforms/SLPVectorizer/X86/shrink_after_reorder.ll
  llvm/test/Transforms/SLPVectorizer/X86/value-bug-inseltpoison.ll
  llvm/test/Transforms/SLPVectorizer/X86/value-bug.ll

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