[PATCH] D105986: [SLP]Improve vectorization of gathered loads.

[Alexey Bataev via Phabricator via llvm-commits]

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

When building the vectorization graph, the compiler may end up with the
consecutive loads in the different branches, which end up to be
gathered. We can scan these loads and try to load them as final
vectorized load and then reshuffle between the brances to avoid extra
scalar loads in the code.

Part of D57059 <https://reviews.llvm.org/D57059>


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D105986

Files:
  llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
  llvm/test/Transforms/SLPVectorizer/AArch64/loadi8.ll
  llvm/test/Transforms/SLPVectorizer/AArch64/transpose-inseltpoison.ll
  llvm/test/Transforms/SLPVectorizer/AArch64/transpose.ll
  llvm/test/Transforms/SLPVectorizer/SystemZ/pr34619.ll
  llvm/test/Transforms/SLPVectorizer/X86/crash_exceed_scheduling.ll
  llvm/test/Transforms/SLPVectorizer/X86/crash_lencod.ll
  llvm/test/Transforms/SLPVectorizer/X86/crash_smallpt.ll
  llvm/test/Transforms/SLPVectorizer/X86/extractelement.ll
  llvm/test/Transforms/SLPVectorizer/X86/horizontal-minmax.ll
  llvm/test/Transforms/SLPVectorizer/X86/jumbled-load-used-in-phi.ll
  llvm/test/Transforms/SLPVectorizer/X86/jumbled-load.ll
  llvm/test/Transforms/SLPVectorizer/X86/lookahead.ll
  llvm/test/Transforms/SLPVectorizer/X86/matched-shuffled-entries.ll
  llvm/test/Transforms/SLPVectorizer/X86/operandorder.ll
  llvm/test/Transforms/SLPVectorizer/X86/partail.ll
  llvm/test/Transforms/SLPVectorizer/X86/phi.ll
  llvm/test/Transforms/SLPVectorizer/X86/remark_extract_broadcast.ll
  llvm/test/Transforms/SLPVectorizer/X86/reorder_repeated_ops.ll
  llvm/test/Transforms/SLPVectorizer/X86/shrink_after_reorder.ll
  llvm/test/Transforms/SLPVectorizer/slp-umax-rdx-matcher-crash.ll

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