[llvm] AMDGPU: Fix temporal divergence introduced by machine-sink and performance regression introduced by D155343 (PR #67456)

[via llvm-commits]

petar-avramovic wrote:

> What is the relation between #67456 (this PR) and #67033? Does this PR supersede the other one?

Yes, this PR is updated #67033 according to all comments and main difference is that this PR uses target hook in machine-sink to fix temporal divergence while #67033 uses machine-function-pass.


https://github.com/llvm/llvm-project/pull/67456