[llvm] [AArch64][SVE] Support copy of PPR2 register class in copyPhysReg (PR #216303)

[David Sherwood via llvm-commits]

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@@ -5771,6 +5771,8 @@ void AArch64InstrInfo::copyPhysRegTuple(MachineBasicBlock &MBB,
     const MachineInstrBuilder MIB = BuildMI(MBB, I, DL, get(Opcode));
     AddSubReg(MIB, DestReg, Indices[SubReg], RegState::Define, TRI);
     AddSubReg(MIB, SrcReg, Indices[SubReg], {}, TRI);
+    if (Opcode == AArch64::ORR_PPzPP)
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david-arm wrote:

Why do we need to check the opcode here? I was just looking at the ZPR2RegClass case, also handled in copyPhysReg, and we don't seem to need opcode checking in that case. I assume there is a problem with `getKillRegState(KillSrc)`?

https://github.com/llvm/llvm-project/pull/216303