[all-commits] [llvm/llvm-project] a1ae3c: [RISCV][LegalizeDAG] Expand SETO and SETUO compari...

[Craig Topper via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: a1ae3c6ac91305711658c75de48415e5b647f1df
      https://github.com/llvm/llvm-project/commit/a1ae3c6ac91305711658c75de48415e5b647f1df
  Author: Craig Topper <craig.topper at sifive.com>
  Date:   2020-12-10 (Thu, 10 Dec 2020)

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

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

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.

Differential Revision: https://reviews.llvm.org/D92008