[llvm] [AMDGPU][CodeGen] Utilized MBB's liveIn check in SILowerSGPRSpills (PR #129848)

[Vikash Gupta via llvm-commits]

vg0204 wrote:

@MatzeB , as you were the one to come up with the liveIns of MBB as physReg+LaneBitmask representation. What's your view about this?


https://github.com/llvm/llvm-project/pull/129848