[llvm] [AArch64] SimplifyDemandedBitsForTargetNode - add AArch64ISD::BICi handling (PR #76644)

[Sizov Nikita via llvm-commits]

snikitav wrote:

> Any luck with creating a test in AArch64SelectionDAGTest.cpp for the BICi known bits?

@RKSimon Are you sure? I don't see any AArch64ISD namespace using in AArch64SelectionDAGTest.cpp. I feel like missing something. Could you give me a bit of guidance here?

https://github.com/llvm/llvm-project/pull/76644