[PATCH] D108382: [X86] lowerShuffleAsDecomposedShuffleMerge(): if both inputs are broadcastable/identities, canonicalize broadcasts as such

[Roman Lebedev via Phabricator via llvm-commits]

lebedev.ri updated this revision to Diff 367551.
lebedev.ri marked 3 inline comments as done.
lebedev.ri added a comment.

@RKSimon thank you for taking a look!
Hopefully addressed review notes.

Note that i'm not quite sure that this is the right way.
This paves road for D108253 <https://reviews.llvm.org/D108253> that fixes https://bugs.llvm.org/show_bug.cgi?id=50971


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D108382/new/

https://reviews.llvm.org/D108382

Files:
  llvm/lib/Target/X86/X86ISelLowering.cpp
  llvm/test/CodeGen/X86/copy-low-subvec-elt-to-high-subvec-elt.ll
  llvm/test/CodeGen/X86/horizontal-sum.ll
  llvm/test/CodeGen/X86/oddshuffles.ll

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