[clang] [llvm] [InstCombine] Canonicalize `(sitofp x)` -> `(uitofp x)` if `x >= 0` (PR #82404)

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goldsteinn wrote:

> It looks like you need to update `Headers/__clang_hip_math.hip` in clang.

Fixed. Thats what I get for not running clang tests :/

https://github.com/llvm/llvm-project/pull/82404