* [MLIR] Add flag to dump jitted MLIR to object file

This PR adds a flag to be able to dump the jitted MLIR code to an object
file and another flag to be able to specify the object file name.

* Add curly braces

* Fix wrong merge

* Fixes bug in provenenace for subgraph replacement

* Updates unit tests for the provenance algorithm fix

* Changes provnance set to ordered set for better consistency in iteration order.

* Fix unsigned comparison and implicit double conversion

* Eliminate sign/unsigned compare warnings, implicit double conversion

* Missed type

* Neww int type

* omp compromise

* style

* Pad:v1 was introduced

* Fixed problem with foward declaration

* Code review remarks introduced

* Addtinal asserts and unit-test for Pad:v1 introduced

* Handled optinal arg_pad_value input

* Fixed unit tests messages and clang styles applied

* Styles applied, checking rank improved

* Updated changes.md

* Revert "Updated changes.md"

This reverts commit 8ee16e580705275ee0719648d5251021354e4d84.

* Clang warning fixed

* Changed name of concat axis

* Clang styles applied

* Revert "Clang styles applied"

This reverts commit 4c1d3f4436765ce9eafa00140365d5d3e358eab1.

* Revert "Changed name of concat axis"

This reverts commit cdfe6638777509f21b199ce78fc2fe28cec15d45.

* Introduced alias methods

* Updated changes.md

* Do not throw for unknown domains in ONNX models

* UT that makes sure onnx_importer does not throw for unknown domains

* Check if nGraph throws for unknown ONNX domain and op

* Enable Padding

* Small fix to match MLIR API change

* WIP

* Subtract pad below from virtual img index

* Fixed integer set inequalities

* style-apply

* remove unneeded padAbove values

* Remove dump call

* PR feedback

* style apply

* Re-use memref

* add mem opt file

* Add missing files

* Add flag

* Fix style

* Small fix

* PR fixes. WIP

* PR fixes

* Fixed conv validation logic. Invoked after ng mem opt pass. Style-apply

* style-apply

* Remove some dynamic_ptr_casts

* More removals

* Review comments

* Update src/ngraph/node.hpp
Co-Authored-By: Adam Procter <adam.m.procter@intel.com>

Replace set with vector container in MLIR sub-graphs for
nodes, inputs and outputs. Using a set caused different order of
operations in MLIR code across different executions and this led to
differences in optimizations.

* Fix style in compiler and lowerer files

* Fix comment in headers

* Revert "Fix comment in headers"

This reverts commit d52eed4c1bdf371f3cc7d3f601d9d2b1b0c233e8.

* Fix compiler.* header. Fix code style in other files

[MLIR] Bump LLVM repo

* Enable unuser parameter warnings

* Unused params

* resolve -wall warnings with clang-8

* remove -Wno-extra-semi-stmt

There are some fixes for AVX-512 vectorization.

* Unnused parameter cleanup

* style

* Fix CPU unused parameter warnings

* md used in mkldnn1.0

* latest PlaidML-GPU updates for 0.26

* Update Release Notes page for 0.26

* Add retry to clone step

* Increase checkout timeout

* Static linking refactorization

* File name changed

* Doc for PR 3497 - improve static backend apis

* Merge issue

Remove static initializers from ops

* Static linking refactorization

* File name changed

* Update changes.md

* Merge error

* revert

* Review comments

* WIP

* Fixes

* Increase bitwidth for arg idx attrib

* Minor fixes

* style-apply

* nGraph-ONNX CI improvement

- Added parallel CI on many SKUs,
- Jenkinsfile written in Declarative Pipeline which allows displaying sequential stages for parallel branches in Blue Ocean
- Moved proper CI code to ngraph-onnx repository
- Moved base_image_builder to ngraph-onnx repository

* Fix license header

* try catch for git info retrieval

* Add unsupported ops to iGPU backend

* Revert previous change

* [MLIR] Enable LIT testing in CMAKE

This PR enables LIT testing in nGraph for MLIR Compiler, introduced in
PR3523. We can now do `make check-mlir-lit` to run LIT tests.

* Address feedback

* Revisit PR after cmake clean-up

* [MLIR] Introduce ngraph-opt tool

To be used, among other things, for LIT testing.
`elementwise_binary_ops.mlir` shows a simple LIT test
using ngraph-opt.

Dummy affine_lowering/lit_test.mlir test that served as initial testing
of LIT tool configuration is now removed.

* Address feedback

* Bump MLIR version and minor fixes in nGraph

* advance commit ids

* fix commit id

Fix reshape error for onnx (on master)

Fixed NormalizeL2 decomposition for input shape length != 4