[PATCH] D99270: [RISCV] Optimize select-like vector shuffles

[Fraser Cormack via Phabricator via llvm-commits]

frasercrmck created this revision.
frasercrmck added reviewers: craig.topper, evandro, rogfer01, HsiangKai, khchen, arcbbb.
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This patch adds a small optimization for vector shuffle lowering,
detecting shuffles which can be re-expressed as vector selects.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D99270

Files:
  llvm/lib/Target/RISCV/RISCVISelLowering.cpp
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-int-shuffles.ll

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