[PATCH] D107447: [RISCV] Add tests covering shuffles which can be optimized

[Fraser Cormack via Phabricator via llvm-commits]

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These shuffles all take the form of a "splat" of the LHS and/or RHS to
some degree, with one or two elements needing patched up afterwards. We
currently lower all of these to full LHS/RHS vector-index shuffles with
vrgather.vv.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D107447

Files:
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-int-shuffles.ll

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