[all-commits] [llvm/llvm-project] e68e4c: [GlobalISel] Change representation of shuffle mask...

[Eli Friedman via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: e68e4cbcc50ba7ab8df5e09023f15e6cc2223bef
      https://github.com/llvm/llvm-project/commit/e68e4cbcc50ba7ab8df5e09023f15e6cc2223bef
  Author: Eli Friedman <efriedma at quicinc.com>
  Date:   2020-01-13 (Mon, 13 Jan 2020)

  Changed paths:
    M llvm/include/llvm/CodeGen/MachineFunction.h
    M llvm/include/llvm/CodeGen/MachineInstrBuilder.h
    M llvm/include/llvm/CodeGen/MachineOperand.h
    M llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp
    M llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
    M llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
    M llvm/lib/CodeGen/MIRParser/MIParser.cpp
    M llvm/lib/CodeGen/MachineFunction.cpp
    M llvm/lib/CodeGen/MachineOperand.cpp
    M llvm/lib/CodeGen/MachineVerifier.cpp
    M llvm/lib/Target/AArch64/AArch64InstructionSelector.cpp
    M llvm/test/CodeGen/AArch64/GlobalISel/prelegalizercombiner-shuffle-vector.mir

  Log Message:
  -----------
  [GlobalISel] Change representation of shuffle masks in MachineOperand.

We're planning to remove the shufflemask operand from ShuffleVectorInst
(D72467); fix GlobalISel so it doesn't depend on that Constant.

The change to prelegalizercombiner-shuffle-vector.mir happens because
the input contains a literal "-1" in the mask (so the parser/verifier
weren't really handling it properly). We now treat it as equivalent to
"undef" in all contexts.

Differential Revision: https://reviews.llvm.org/D72663