[clang] [llvm] [AMDGPU] Adding the amdgpu-num-work-groups function attribute (PR #79035)

[Jun Wang via cfe-commits]

jwanggit86 wrote:

Thanks for explaining the "dependent exp". At present, template arguments are not required for the attribute. In other words, only int constants are supported. Diagnostics and test cases have been updated.

https://github.com/llvm/llvm-project/pull/79035