[clang] [Clang][AMDGPU] Use `I` to decorate imm argument for `__builtin_amdgcn_global_load_lds` (PR #94376)

[Matt Arsenault via cfe-commits]

https://github.com/arsenm commented:

Missing non-constant tests for each parameter?

https://github.com/llvm/llvm-project/pull/94376