[llvm] [AMDGPU] DAG Mutation to solve load bunching in outer product matrix multiplications (PR #203095)

[Axel Sorenson via llvm-commits]

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axelcool1234 wrote:

`LoadInfo` will need an explicit constructor for this. Should I still do it? I can also do `Loads.emplace_back(LoadInfo{&SU})`

https://github.com/llvm/llvm-project/pull/203095