Jiaming Yuan f79cc4a7a4
Implement categorical prediction for CPU and GPU predict leaf. (#7001)
* Categorical prediction with CPU predictor and GPU predict leaf.

* Implement categorical prediction for CPU prediction.
* Implement categorical prediction for GPU predict leaf.
* Refactor the prediction functions to have a unified get next node function.

Co-authored-by: Shvets Kirill <kirill.shvets@intel.com>
2021-06-11 10:11:45 +08:00
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