GitLab

* 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

* Formatting

* Copy using pinned memory

* Formatting

* Improve performance of gpu copying

* Formatting

* Dont copy

* Formatting

* 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.