[PATCH] D107883: [RISCV] Select vector mul by 2 to a vector add.

[Jianjian Guan via Phabricator via llvm-commits]

jacquesguan created this revision.
jacquesguan added reviewers: craig.topper, khchen, frasercrmck.
Herald added subscribers: vkmr, evandro, 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.
jacquesguan requested review of this revision.
Herald added subscribers: llvm-commits, MaskRay.
Herald added a project: LLVM.

Inspired by D106689 <https://reviews.llvm.org/D106689>. A vector add may be faster than a vector multiply.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D107883

Files:
  llvm/lib/Target/RISCV/RISCVInstrInfoVSDPatterns.td
  llvm/lib/Target/RISCV/RISCVInstrInfoVVLPatterns.td
  llvm/test/CodeGen/RISCV/rvv/vmul-sdnode-rv32.ll
  llvm/test/CodeGen/RISCV/rvv/vmul-sdnode-rv64.ll

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