[PATCH] D133491: [AArch64] Try to fold shuffle (tbl2, tbl2) to tbl4.

[Florian Hahn via Phabricator via llvm-commits]

fhahn created this revision.
fhahn added reviewers: dmgreen, t.p.northover, ab, samparker.
Herald added subscribers: hiraditya, kristof.beyls.
Herald added a project: All.
fhahn requested review of this revision.
Herald added a project: LLVM.

shuffle (tbl2, tbl2) can be folded into a single tbl4 if the shuffle selects
the first 8 elements of each tbl2 and the tbl2 masks can be merged.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D133491

Files:
  llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
  llvm/test/CodeGen/AArch64/arm64-tbl.ll

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