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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>

* Use hipStreamSynchronize instead of device sync

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* Suppress FPs

* Use sync_stream instead of device

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* Fix python bindings

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* Make global variables const

* Tidy fixes

* Disable some lints

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* Fix tidy const

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* Add missing const keywords

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* More fixes

* Fix remaining tidy issues

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* Fix rocblas function call

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* Fix nodiscard warnings

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* Use named parameters

* Remove overload

* Add overload

* Remove noncps

* Use named param for node

* Add auto register header

* Use named parameters

* Refactor jenkinsfile

* Fix shadow

* Add missing body variable

* Add more const methods

* Add hip-clang docker builds

* Remove comments

* Add clang-format

* Add more const

* Formatting

* Rename stage

* Disable check

* Add another const

* Add python 2 dev packages

* Add sphinx to dockerfile

* Register ops for main migraphx

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* Register cpu ops

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* Show list of operators in the driver

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* Simplify regiter

* Try to register gpu ops

* Fix compiler errors

* Register rest of the gpu operators

* Add some tests

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* Fix gcc compiler warnings

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* Fix tidy warnings

* Fix compile error

* Use correct op name

* Register layer norm

* Use const ref

* Make run const

* code backup

* code backup
Co-authored-by: mvermeulen <5479696+mvermeulen@users.noreply.github.com>

* Fix bug in eliminate_concat with negative axis

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* Fix unused parameter

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Co-authored-by: Shucai Xiao <shucai.xiao@amd.com>

* Add compiler options

* Add copy operators

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* Use run_passes in tests

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* Use run_pass in schedule test

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* Add compile_options to get_passes in target

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* Offload copy option

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* Copy using pinned memory

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* Improve performance of gpu copying

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* Dont copy

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* Always make an extra copy

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* Remove unused write op

* Add missing include

* Remove copy_to_gpu function in python api

* Make offload copy disabled by default on C++

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* Fix tidy issues

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* Fix namespace

* Fix python tests

* Turn clang format off since its broken

* Fix compile error on gcc 5

* Remove commented code

* Remove extra copy in gemm

* combine rocblas gemm call

* clang format

* fix a bug in calling rocblas function

* clang format'

* backup of temporary changes

* clang format

* unify the gemm call to avoid multiple gpu implemantation

* clang format

* remove unnecessary code

* backup temp changes

* clang format

* fix cppcheck error

* code backup

* clang format

* remove unnecessary synchronization function

* clang format

* fix bugs

* clang format

* more optimization related to gemm

* clang format

* code cleanup

* implementation that can achieves better performance

* clang format

* temp changes to try performance

* clang format

* revert to previous commits

* fixed review comments

* clang format

* fix review comments