[llvm] [CodeGen] Add MO_LaneMask type and a new COPY_LANEMASK instruction (PR #151944)

[Jay Foad via llvm-commits]

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@@ -106,6 +106,7 @@ std::string VRegRenamer::getInstructionOpcodeHash(MachineInstr &MI) {
     case MachineOperand::MO_ExternalSymbol:
     case MachineOperand::MO_GlobalAddress:
     case MachineOperand::MO_BlockAddress:
+    case MachineOperand::MO_LaneMask:
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jayfoad wrote:

This should be trivial to hash, so probably belongs in the "TODO" block above, around line 100.

https://github.com/llvm/llvm-project/pull/151944