[llvm] [AMDGPU]Optimize SGPR spills (PR #93668)

[Yaxun Liu via llvm-commits]

yxsamliu wrote:

[res.new.zip](https://github.com/user-attachments/files/15914966/res.new.zip)
bc and assembly without debug info are attached. pls use 4b9112e88a998ce620e4683548f2afd17cc5fe95 clang and the above mentioned command to get assembly and compare with the attached one to make sure they are the same.

https://github.com/llvm/llvm-project/pull/93668