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* Make global variables const

* Tidy fixes

* Disable some lints

* Formatting

* Fix tidy const

* Formatting

* Add missing const keywords

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* More fixes

* Fix remaining tidy issues

* Formatting

* Fix rocblas function call

* Formatting

* Fix nodiscard warnings

* Formatting

* 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

* 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>

* improve gather implementation to handle negative input indices

* clang format

* clang format

* improve concat to support neg axis input

* clang format

* fix cppcheck error

* clang format

* code cleanup

* clang format

* fix review comments

* clang format

* Add compiler options

* Add copy operators

* Formatting

* Use run_passes in tests

* Formatting

* Use run_pass in schedule test

* Formatting

* Add compile_options to get_passes in target

* Formatting

* Offload copy option

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* Copy using pinned memory

* Formatting

* Improve performance of gpu copying

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* Dont copy

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* Always make an extra copy

* Formatting

* Remove unused write op

* Add missing include

* Remove copy_to_gpu function in python api

* Make offload copy disabled by default on C++

* Formatting

* Fix tidy issues

* Formatting

* Fix namespace

* Fix python tests

* Turn clang format off since its broken

* Fix compile error on gcc 5

* Remove commented code

change the axis value in gather not be to mutable and add corresponding tests, according to Paul's comments.