[llvm] [AMDGPU] Lower `llvm.amdgcn.queue.ptr` instrinsic to using implicit kernel argument if feasible (PR #103490)

[Shilei Tian via llvm-commits]

shiltian wrote:

> There is already a representation for load from implicit argument pointer, and we don't need 2 ways of doing that.

Which is the representation for loading queue ptr from implicit kernel argument?

https://github.com/llvm/llvm-project/pull/103490