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

[Carl Ritson via llvm-commits]

https://github.com/perlfu commented:

Needs test for i1 return values?

Patch doesn't seem wave size sensitive as it just attempts to fix up COPYs from s32 to s64 and vice versa -- but based on the test these COPYs seem to represent a deeper problem that is not being addressed.

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