[llvm] [llvm][AArch64] Preserve regmask when expanding the BLR_BTI pseudo instruction (PR #73927)

[via llvm-commits]

================
@@ -838,6 +838,13 @@ bool AArch64ExpandPseudo::expandCALL_BTI(MachineBasicBlock &MBB,
   Call->addOperand(CallTarget);
   Call->setCFIType(*MBB.getParent(), MI.getCFIType());
 
----------------
DanielKristofKiss wrote:

maybe we could just say:
`Call->copyImplicitOps(*MBB.getParent(), MI);`

https://github.com/llvm/llvm-project/pull/73927