llvm-project

ec1016f7 - [IVDescriptors] Support reductions with minimumnum/maximumnum. (#137335)

[IVDescriptors] Support reductions with minimumnum/maximumnum. (#137335) Add a new reduction recurrence kind for reductions with minimumnum/maximumnum. Such reductions can be vectorized without nsz/nnans, same as reductions with maximum/minimum intrinsics. Note that a new reduction kind is needed to make sure partial reductions are also combined with minimumnum/maximumnum. Note that the final reduction to a scalar value is performed with vector.reduce.fmin/fmax. This should be fine, as the results of the partial reductions with maximumnum/minimumnum silences any sNaNs. In-loop and reductions in SLP are not supported yet, as there's no reduction version of maximumnum/minimumnum yet and fmax may be incorrect. PR: https://github.com/llvm/llvm-project/pull/137335