GitLab

Add Loop operator for opset version 13.
Notes: 1) Default max iteration number is 10 if no max iteration number is provided
2) To change the max iter number, a user can set the max_loop_iterations in the onnx_option struct when parsing a model.
3) The returned shape of the scan output is from the max_loop_iterations even the actual loop num is less than that. This issue also applies to other operators like NonZero and NonMaxSuppression. A issue #948 is created to track this and to be resolved later.
Co-authored-by: Paul <pfultz2@yahoo.com>
Co-authored-by: mvermeulen <5479696+mvermeulen@users.noreply.github.com>

* Fix HIP-Clang GPU build issues

Add missing device attributes for GPU functions. GPU functions must be annotated with __device__ in HIP.

* Use HIP device function max and min

* Fix clang-format-5.0 issues

* Undo change that breaks on HIP-HCC
Co-authored-by: mvermeulen <5479696+mvermeulen@users.noreply.github.com>