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Instead of just unsqueezing to an axis of 1 a step can be set to use instead. So instead of unsqueezing {3, 12} to {3, 1, 12} a step of 2 will unsqeeze to {3, 2, 6} instead

This reorders the transposes across slice to improve horizontal fusion for contiguous. This also improves eliminate_contiguous to remove contiguous better across splits.

Updated each source file in the repo with the existing license.

In migraphx, DepthToSpace (d2s) is implemented as reshape --> transpose --> contiguous --> reshape.

If there is trailing binary pointwise operator after depthToSpace then, migraphx can move binary operator before contiguous and reshape of the depthtospce.

So, it becomes reshape-->transpose-->binary_op-->contiguous-->reshape.

Explicit contiguous wouldn't be required since binary_op outputs standard shape. So, it becomes reshape-->transpose-->binary-->reshape.

simplify_reshapes already has matcher that can do this transformation. This PR adds test for cases like depthtospace +binary op.

solves #905

In migraphx, DepthToSpace (d2s) is implemented as reshape --> transpose --> contiguous --> reshape.

This PR adds matcher to find d2s + unary pointwise ops.

Application of the matcher moves the pointwise unary operation before the contiguous and reshape of the d2s.
So it becomes
reshape --> transpose --> unary --> contiguous --> reshape.

Motivation is that, later pointwise module would be created out of unary --> contiguous --> reshape. Codegen for this pointwise module can write out buffer such that explicit contiguous and reshape wouldn't be required.

This transformation is not always guaranteed to improve performance, since unary op will operate on non-standard shape. So, we would need some tuning mechanism to make decision.

#905 pending PR for binary operations.

* always keep parameters

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* fix tidy error

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* add more unit tests to have more code coverage

* fixed a bug to ensure get_parameter_names to return ordered parameter names

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* remove unnecessary print out

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* add a unit test to check parameter is not removed by dead code elimination

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* rename a function name
Co-authored-by: Chris Austen <causten@users.noreply.github.com>

* rename broadcast and multibroadcast output_lens attribute to out_lens attribute, and change tests and source code to reflect the same

* change the reshape attribute from dims to out_lens

* change transpose attribute's name from dims to perm to reflect better meaning

* use permutation instead of perm for transpose

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* use dims instead of out_lens for reshape

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* add a matcher related to the special resize case for optimization

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* remove unnecessary code

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* fix cppcheck error

* add a unit test for optimize resize

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* remove unnecessary header include

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* add unit tests for optimizing resize

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* add more unit test for optimizing where op

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* remove unnecessary code

* add one more optimzation to remove contiguous

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* add a pointwise requirement

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* fix a bug related to reshape_cont optimization

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* removed an unnecessary comment

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

* Update test for passes

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* Rewrite normalize pass

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* change return of get_main_module from ref to pointer

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* change program to module in various passes and matcher

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* Add option to no generate a destroy method

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* Add flag to enable cpu backend

* Make buffers shared

* Enable optimizations

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* Add missing has_op function

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* remove the begin/end function of the program class

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* add unit tests for more code coverage

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* fix a build error in debug mode

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Co-authored-by: Paul <pfultz2@yahoo.com>

* Load op when serializing

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* Add missing clip field

* Use make_op almost everywhere

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* More make ops for rnns

* Get rid of spaces

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* Remove operators headers

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* Remove unused op headers

* Increase line threshold

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

* Fix fusions in bert model

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* Fix one_half matcher

* Workaround ICE on gcc

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

* fix a bug related to concat transpose.

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* use return instruction to replace the fake instruction
Co-authored-by: mvermeulen <5479696+mvermeulen@users.noreply.github.com>

* Add initial optimization when using a mul over a sliced convolution

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* Convert to an assert

* Check if used once

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* Add test with horiz fusion

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* Optimize nested slice

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* Remove unnecessary assert
Co-authored-by: mvermeulen <5479696+mvermeulen@users.noreply.github.com>

* Add initial api

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* Fix some compilation errors

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* Fix verify parameters

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* Add method to get output shapes and bytes

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* Fix package dependency

* change migraphx api to support multiple program outputs

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Co-authored-by: Paul Fultz II <pfultz2@yahoo.com>
Co-authored-by: kahmed10 <15948690+kahmed10@users.noreply.github.com>

* add multibroadcast to simplify reshapes

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* Add compiler options

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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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* Improve performance of gpu copying

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* Always make an extra copy

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* Remove unused write op

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* Remove copy_to_gpu function in python api

* Make offload copy disabled by default on C++

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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

* Flatten nested concats

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* Rename tests

* Fix compiler crash in TF inceptionv4

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* Remove else