[PATCH] D105514: [DRAFT][DAGCombine] Reassociate chain of vector insertions into blend between source vector and build vector

[Roman Lebedev via Phabricator via llvm-commits]

lebedev.ri updated this revision to Diff 357055.
lebedev.ri added a comment.

Iff we'd ever want to do that, this is roughly the folds we'd want, but right now i'm not sure we want to.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D105514/new/

https://reviews.llvm.org/D105514

Files:
  llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
  llvm/test/CodeGen/AArch64/arm64-neon-copy.ll
  llvm/test/CodeGen/AArch64/arm64-vector-insertion.ll
  llvm/test/CodeGen/PowerPC/aix-vec_insert_elt.ll
  llvm/test/CodeGen/PowerPC/vec_insert_elt.ll
  llvm/test/CodeGen/Thumb2/mve-float32regloops.ll
  llvm/test/CodeGen/Thumb2/mve-vst3.ll
  llvm/test/CodeGen/X86/2008-06-25-VecISelBug.ll
  llvm/test/CodeGen/X86/avx-cvt-3.ll
  llvm/test/CodeGen/X86/avx512-insert-extract.ll
  llvm/test/CodeGen/X86/insertelement-ones.ll
  llvm/test/CodeGen/X86/insertelement-zero.ll
  llvm/test/CodeGen/X86/masked_load.ll
  llvm/test/CodeGen/X86/vector-shuffle-128-v16.ll
  llvm/test/CodeGen/X86/vector-shuffle-avx512.ll
  llvm/test/CodeGen/X86/vector-shuffle-combining.ll
  llvm/test/CodeGen/X86/widen_conv-4.ll

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