[PATCH] D139512: [RISCV] Use vcpop.m to extract the first element from mask vector.

[Jianjian Guan via Phabricator via llvm-commits]

jacquesguan created this revision.
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This patch uses vcpop.m with VL=1 to extract the first bit of mask.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D139512

Files:
  llvm/lib/Target/RISCV/RISCVISelLowering.cpp
  llvm/test/CodeGen/RISCV/rvv/extractelt-i1.ll
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-extract-i1.ll

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