[PATCH] D123051: [RISCV][VP] Add basic RVV codegen for vp.fcmp

[Fraser Cormack via Phabricator via llvm-commits]

frasercrmck created this revision.
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This patch adds the necessary infrastructure to lower vp.fcmp via
ISD::VP_SETCC to RVV instructions.

Most notably this patch adds cond-code legalization for VP_SETCC,
reusing the existing TargetLowering::LegalizeSetCCCondCode by passing in
additional SDValue parameters for the Mask and EVL. This method then
uses VP operations to legalize the condcode.

There is still a general lack of canonicalization on VP_SETCC as opposed
to SETCC which results in worse code than is theoretically possible.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D123051

Files:
  llvm/include/llvm/CodeGen/TargetLowering.h
  llvm/include/llvm/IR/VPIntrinsics.def
  llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
  llvm/lib/CodeGen/SelectionDAG/LegalizeVectorOps.cpp
  llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
  llvm/lib/Target/RISCV/RISCVInstrInfoVVLPatterns.td
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-setcc-fp-vp.ll
  llvm/test/CodeGen/RISCV/rvv/setcc-fp-vp.ll

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