[all-commits] [llvm/llvm-project] feac76: [GlobalISel][AArch64] Add G_FPTOSI_SAT/G_FPTOUI_SA...

[David Green via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: feac761f3797c4232224fa891df12a5fef74ded9
      https://github.com/llvm/llvm-project/commit/feac761f3797c4232224fa891df12a5fef74ded9
  Author: David Green <david.green at arm.com>
  Date:   2024-09-16 (Mon, 16 Sep 2024)

  Changed paths:
    M llvm/docs/GlobalISel/GenericOpcode.rst
    M llvm/include/llvm/CodeGen/GlobalISel/GenericMachineInstrs.h
    M llvm/include/llvm/CodeGen/GlobalISel/LegalizerHelper.h
    M llvm/include/llvm/CodeGen/GlobalISel/MachineIRBuilder.h
    M llvm/include/llvm/Support/TargetOpcodes.def
    M llvm/include/llvm/Target/GenericOpcodes.td
    M llvm/include/llvm/Target/GlobalISel/SelectionDAGCompat.td
    M llvm/include/llvm/Target/TargetSelectionDAG.td
    M llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
    M llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
    M llvm/lib/Target/AArch64/AArch64InstrInfo.td
    M llvm/lib/Target/AArch64/GISel/AArch64LegalizerInfo.cpp
    M llvm/lib/Target/AArch64/GISel/AArch64RegisterBankInfo.cpp
    M llvm/test/CodeGen/AArch64/GlobalISel/legalizer-info-validation.mir
    M llvm/test/CodeGen/AArch64/fptosi-sat-scalar.ll
    M llvm/test/CodeGen/AArch64/fptosi-sat-vector.ll
    M llvm/test/CodeGen/AArch64/fptoui-sat-scalar.ll
    M llvm/test/CodeGen/AArch64/fptoui-sat-vector.ll
    M llvm/test/TableGen/GlobalISelEmitter.td

  Log Message:
  -----------
  [GlobalISel][AArch64] Add G_FPTOSI_SAT/G_FPTOUI_SAT (#96297)

This is an implementation of the saturating fp to int conversions for
GlobalISel. On AArch64 the converstion instrctions work this way,
producing saturating results. LegalizerHelper::lowerFPTOINT_SAT is
ported from SDAG.

AArch64 has a lot of existing tests for fptosi_sat, covering a wide
range of types. I have tried to make most of them work all at once, but
a few fall back due to other missing features such as f128 handling for
min/max.



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