[llvm] [AMDGPU] When allocating VGPRs, VGPR spills are not part of the prologue (PR #109439)

[Christudasan Devadasan via llvm-commits]

cdevadas wrote:

> As I mentioned in the other PR, I think we also need to include wwm register reload.

The WWM reloads will happen for all lanes with the manipulated exec mask. Why do you think they should be included as well?

https://github.com/llvm/llvm-project/pull/109439