[llvm] [AMDGPU] Allocate i1 argument to SGPRs (PR #72461)

[Jun Wang via llvm-commits]

jwanggit86 wrote:

The latest commit primarily fixes problems that occur when -global-isel is used. Problems with both incoming i1 args and i1 return values are fixed.

https://github.com/llvm/llvm-project/pull/72461