[llvm] [AMDGPU] Add wave reduce intrinsics for float types - 1 (PR #161814)

[Juan Manuel Martinez Caamaño via llvm-commits]

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jmmartinez wrote:

Just to highlight: I have no idea TBH, it's a wild guess XD but if it works it'd be nice.

https://github.com/llvm/llvm-project/pull/161814