[llvm-branch-commits] [llvm] [AMDGPU] Fix sign confusion in performMulLoHiCombine (PR #106977)

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h-vetinari wrote:

> I am unsure what ROCm is in this case

[Radeon Open Compute](https://github.com/ROCm), which is (very roughly) AMD's CUDA.

https://github.com/llvm/llvm-project/pull/106977