[PATCH] D92008: [RISCV][LegalizeDAG] Expand SETO and SETUO comparisons. Teach LegalizeDAG to expand SETUO expansion when UNE isn't legal.

[Craig Topper via Phabricator via llvm-commits]

craig.topper created this revision.
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If SETUNE isn't legal, UO can use the NOT of the SETO expansion.

Removes some complex isel patterns. Most of the test changes are
from using XORI instead of SEQZ.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D92008

Files:
  llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
  llvm/lib/Target/RISCV/RISCVISelLowering.cpp
  llvm/lib/Target/RISCV/RISCVInstrInfoD.td
  llvm/lib/Target/RISCV/RISCVInstrInfoF.td
  llvm/test/CodeGen/RISCV/double-br-fcmp.ll
  llvm/test/CodeGen/RISCV/double-fcmp.ll
  llvm/test/CodeGen/RISCV/double-isnan.ll
  llvm/test/CodeGen/RISCV/double-select-fcmp.ll
  llvm/test/CodeGen/RISCV/float-br-fcmp.ll
  llvm/test/CodeGen/RISCV/float-fcmp.ll
  llvm/test/CodeGen/RISCV/float-isnan.ll
  llvm/test/CodeGen/RISCV/float-select-fcmp.ll

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