[PATCH] D149638: [AArch64] Handle VECTOR_SHUFFL mask with splats

[JinGu Kang via Phabricator via llvm-commits]

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As discussed on https://reviews.llvm.org/D148347, we could handle the vector shuffle mask with splats more efficiently with dup.


https://reviews.llvm.org/D149638

Files:
  llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
  llvm/test/CodeGen/AArch64/arm64-swizzle-tbl-i16-layout.ll
  llvm/test/CodeGen/AArch64/shuffles.ll

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