[PATCH] D137966: [AArch64] Lower fixed-length vector_shuffle to SVE splat if possible

[Benjamin Maxwell via Phabricator via llvm-commits]

benmxwl-arm created this revision.
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This adds an extra case to check if a vector_shuffle for a fixed-length
vector that's being lowered to SVE, is just a splat. Doing this avoids
a round trip to the stack and back for a few cases.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D137966

Files:
  llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
  llvm/test/CodeGen/AArch64/sve-fixed-length-shuffles.ll
  llvm/test/CodeGen/AArch64/sve-streaming-mode-fixed-length-extract-subvector.ll
  llvm/test/CodeGen/AArch64/sve-streaming-mode-fixed-length-shuffle.ll

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