Fix some typos in the amdgpu backend. Differential Revision: https://reviews.llvm.org/D119235
Differential Revision: https://reviews.llvm.org/D119502
Use same MSSA clobbering checks as in the AMDGPUAnnotateUniformValues. Kernel argument promotion needs exactly the same information so factor out utility function isClobberedInFunction. Differential Revision: https://reviews.llvm.org/D119480