[PATCH] D158896: [RISCV] Improve splatPartsI64WithVL for fixed vector constants where Hi Lo are same and the VL is constant.

[Craig Topper via Phabricator via llvm-commits]

craig.topper created this revision.
craig.topper added reviewers: reames, luke.
Herald added subscribers: jobnoorman, sunshaoce, VincentWu, vkmr, frasercrmck, luismarques, apazos, sameer.abuasal, s.egerton, Jim, benna, psnobl, jocewei, PkmX, the_o, brucehoult, MartinMosbeck, rogfer01, edward-jones, zzheng, jrtc27, shiva0217, kito-cheng, niosHD, sabuasal, simoncook, johnrusso, rbar, asb, hiraditya, arichardson.
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craig.topper requested review of this revision.
Herald added subscribers: wangpc, eopXD, MaskRay.
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If doubling the VL will fit in a vsetvli, use it. It will be cheap
to change and cheap to change back.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D158896

Files:
  llvm/lib/Target/RISCV/RISCVISelLowering.cpp
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-bitreverse-vp.ll
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-bitreverse.ll
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-ctlz-vp.ll
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-ctlz.ll
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-ctpop-vp.ll
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-ctpop.ll
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-cttz-vp.ll
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-cttz.ll

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