[PATCH] D140669: [RISCV] Use tail agnostic if inserting subvector/element at the end of a vector.

[Yeting Kuo via Phabricator via llvm-commits]

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The patch tries to make more vslidup nodes use tail agnostic. The idea comes
from D125546 <https://reviews.llvm.org/D125546> authored by Zack Chen.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D140669

Files:
  llvm/lib/Target/RISCV/MCTargetDesc/RISCVBaseInfo.h
  llvm/lib/Target/RISCV/RISCVISelLowering.cpp
  llvm/test/CodeGen/RISCV/fpclamptosat_vec.ll
  llvm/test/CodeGen/RISCV/rvv/fixed-vector-shuffle-reverse.ll
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-extract.ll
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-fp-shuffles.ll
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-insert-i1.ll
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-insert.ll
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-int-buildvec.ll
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-int-shuffles.ll
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-int.ll
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-mask-buildvec.ll
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-masked-gather.ll
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-masked-scatter.ll
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-unaligned.ll
  llvm/test/CodeGen/RISCV/rvv/vector-splice.ll
  llvm/test/CodeGen/RISCV/shuffle-reverse.ll

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