[all-commits] [llvm/llvm-project] 995835: [SelectionDAG] Add support for the 3-way compariso...

[Poseydon42 via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 995835fe6d4dd7467d8b0b1dbe6a3d9547d900c8
      https://github.com/llvm/llvm-project/commit/995835fe6d4dd7467d8b0b1dbe6a3d9547d900c8
  Author: Poseydon42 <vvmposeydon at gmail.com>
  Date:   2024-06-17 (Mon, 17 Jun 2024)

  Changed paths:
    M llvm/include/llvm/CodeGen/ISDOpcodes.h
    M llvm/include/llvm/CodeGen/TargetLowering.h
    M llvm/include/llvm/Target/TargetSelectionDAG.td
    M llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
    M llvm/lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp
    M llvm/lib/CodeGen/SelectionDAG/LegalizeTypes.h
    M llvm/lib/CodeGen/SelectionDAG/LegalizeVectorOps.cpp
    M llvm/lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp
    M llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
    M llvm/lib/CodeGen/SelectionDAG/SelectionDAGDumper.cpp
    M llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
    M llvm/lib/CodeGen/TargetLoweringBase.cpp
    A llvm/test/CodeGen/AArch64/scmp.ll
    A llvm/test/CodeGen/AArch64/ucmp.ll
    A llvm/test/CodeGen/X86/scmp.ll
    A llvm/test/CodeGen/X86/ucmp.ll

  Log Message:
  -----------
  [SelectionDAG] Add support for the 3-way comparison intrinsics [US]CMP (#91871)

This PR adds initial support for the `scmp`/`ucmp` 3-way comparison
intrinsics in the SelectionDAG. Some of the expansions/lowerings
are not optimal yet.



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