[PATCH] D133891: [SLP]Improve isUndefVector function by adding insertelement analysis.

[Alexey Bataev via Phabricator via llvm-commits]

ABataev created this revision.
ABataev added reviewers: RKSimon, vdmitrie.
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Added the mask and the analysis of the buildvector sequence in the
isUndefVector function, improves codegen and cost estimation.

Metric: SLP.NumVectorInstructions

Program                                                                                       SLP.NumVectorInstructions

  results                   results0 diff

test-suite :: External/SPEC/CFP2017rate/526.blender_r/526.blender_r.test 27362.00                  27360.00 -0.0%

Metric: size..text

Program                                                                                                           size..text

  results     results0    diff

test-suite :: External/SPEC/CFP2017rate/508.namd_r/508.namd_r.test   805299.00   806035.00  0.1%

526.blender_r - some extra code is vectorized.
508.namd_r - some extra code is optimized out.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D133891

Files:
  llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
  llvm/test/Transforms/SLPVectorizer/X86/buildvector-same-lane-insert.ll
  llvm/test/Transforms/SLPVectorizer/X86/cmp-as-alternate-ops.ll
  llvm/test/Transforms/SLPVectorizer/X86/insert-element-build-vector.ll

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