[PATCH] D117670: [RISCV] Support matching 'VF' VL patterns via SPLAT_VECTOR

[Fraser Cormack via Phabricator via llvm-commits]

frasercrmck created this revision.
frasercrmck added reviewers: craig.topper, rogfer01, HsiangKai, arcbbb.
Herald added subscribers: VincentWu, luke957, achieveartificialintelligence, vkmr, evandro, luismarques, apazos, sameer.abuasal, s.egerton, Jim, benna, psnobl, jocewei, PkmX, the_o, brucehoult, MartinMosbeck, edward-jones, zzheng, jrtc27, kito-cheng, niosHD, sabuasal, simoncook, johnrusso, rbar, asb, hiraditya.
frasercrmck requested review of this revision.
Herald added subscribers: llvm-commits, MaskRay.
Herald added a project: LLVM.

This patch improves the matching of our VL patterns to include
SPLAT_VECTOR matching for floating-point vector/scalar variants. This
helps in scalable-vector code, where we don't lower SPLAT_VECTOR to the
RISCVISD::VFMV_V_F_VL node. The approach takes that of the corresponding
support for integer splats, using a ComplexPattern.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D117670

Files:
  llvm/lib/Target/RISCV/RISCVISelDAGToDAG.cpp
  llvm/lib/Target/RISCV/RISCVISelDAGToDAG.h
  llvm/lib/Target/RISCV/RISCVInstrInfoVVLPatterns.td
  llvm/test/CodeGen/RISCV/rvv/vfadd-vp.ll
  llvm/test/CodeGen/RISCV/rvv/vfdiv-vp.ll
  llvm/test/CodeGen/RISCV/rvv/vfmul-vp.ll
  llvm/test/CodeGen/RISCV/rvv/vfrdiv-vp.ll
  llvm/test/CodeGen/RISCV/rvv/vfrsub-vp.ll
  llvm/test/CodeGen/RISCV/rvv/vfsub-vp.ll

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