nGraph integration with TensorFlow

* Added nGraph bridge as a third_party to be built with TensorFlow based on user selection.
* Added a limited set of C++ unit tests to verify the correctness of the computation

WORKSPACE

@@ -79,3 +79,4 @@ new_http_archive(
         "http://download.tensorflow.org/models/speech_commands_v0.01.zip",
     ],
 )
+

tensorflow/BUILD

@@ -24,6 +24,8 @@ load(
     "gen_api_init_files",  # @unused
 )
 
+load("//third_party/ngraph:build_defs.bzl", "if_ngraph")
+
 # Config setting for determining if we are building for Android.
 config_setting(
     name = "android",
@@ -408,6 +410,14 @@ config_setting(
     visibility = ["//visibility:public"],
 )
 
+# This flag is set from the configure step when the user selects with nGraph option.
+# By default it should be false
+config_setting(
+    name = "with_ngraph_support",
+    values = {"define": "with_ngraph_support=true"},
+    visibility = ["//visibility:public"],
+)
+
 package_group(
     name = "internal",
     packages = [
@@ -540,7 +550,7 @@ tf_cc_shared_object(
         "//tensorflow/c:version_script.lds",
         "//tensorflow/c/eager:c_api",
         "//tensorflow/core:tensorflow",
-    ],
+    ] 
 )
 
 tf_cc_shared_object(
@@ -568,7 +578,7 @@ tf_cc_shared_object(
         "//tensorflow/cc:scope",
         "//tensorflow/cc/profiler",
         "//tensorflow/core:tensorflow",
-    ],
+    ] + if_ngraph(["@ngraph_tf//:ngraph_tf"])
 )
 
 exports_files(

tensorflow/core/BUILD

@@ -2325,6 +2325,7 @@ tf_generate_proto_text_sources(
         ":lib_internal",
         ":protos_all_proto_cc",
     ],
+    visibility = ["//visibility:public"],
 )
 
 cc_library(
@@ -2435,6 +2436,7 @@ cc_header_only_library(
     deps = [
         ":core_cpu_lib",
     ],
+    visibility = ["//visibility:public"],
 )
 
 tf_cuda_library(
@@ -2502,7 +2504,7 @@ tf_cuda_library(
             "//third_party/mkl:intel_binary_blob",
             "@mkl_dnn",
         ],
-    ),
+    ) , 
     alwayslink = 1,
 )
 
@@ -2560,6 +2562,7 @@ tf_cuda_library(
 cc_library(
     name = "protos_cc",
     deps = ["//tensorflow/core/platform/default/build_config:protos_cc"],
+    visibility = ["//visibility:public"],
 )
 
 # Library containing all of the graph construction code that is

tensorflow/core/common_runtime/threadpool_device_factory.cc

@@ -19,6 +19,7 @@ limitations under the License.
 #include <vector>
 #include "tensorflow/core/common_runtime/device_factory.h"
 #include "tensorflow/core/framework/allocator.h"
+#include "tensorflow/core/lib/io/path.h"
 #include "tensorflow/core/public/session_options.h"
 
 namespace tensorflow {

tensorflow/core/platform/default/build_config.bzl

@@ -707,4 +707,4 @@ def tf_additional_binary_deps():
       [
           "//third_party/mkl:intel_binary_blob",
       ],
-  )
+  )

tensorflow/python/BUILD

@@ -44,6 +44,7 @@ load("//tensorflow/core:platform/default/build_config_root.bzl", "tf_additional_
 load("//tensorflow/core:platform/default/build_config_root.bzl", "tf_additional_mpi_deps")
 load("//tensorflow/core:platform/default/build_config_root.bzl", "tf_additional_gdr_deps")
 load("//tensorflow/core:platform/default/build_config_root.bzl", "if_static")
+load("//third_party/ngraph:build_defs.bzl","if_ngraph")
 
 py_library(
     name = "python",
@@ -3669,7 +3670,8 @@ tf_py_wrap_cc(
          tf_additional_plugin_deps() +
          tf_additional_verbs_deps() +
          tf_additional_mpi_deps() +
-         tf_additional_gdr_deps()),
+         tf_additional_gdr_deps())+ 
+         if_ngraph(["@ngraph_tf//:ngraph_tf"])
 )
 
 # ** Targets for Windows build (start) **

tensorflow/tensorflow.bzl

@@ -24,6 +24,10 @@ load(
     "if_mkl",
     "if_mkl_lnx_x64"
 )
+load(
+    "//third_party/ngraph:build_defs.bzl",
+    "if_ngraph",
+)
 
 def register_extension_info(**kwargs):
     pass
@@ -214,6 +218,7 @@ def tf_copts(android_optimization_level_override="-O2", is_external=False):
       + if_cuda(["-DGOOGLE_CUDA=1"])
       + if_tensorrt(["-DGOOGLE_TENSORRT=1"])
       + if_mkl(["-DINTEL_MKL=1", "-DEIGEN_USE_VML"])
+      + if_ngraph(["-DINTEL_NGRAPH=1"])
       + if_mkl_lnx_x64(["-fopenmp"])
       + if_android_arm(["-mfpu=neon"])
       + if_linux_x86_64(["-msse3"])

tensorflow/workspace.bzl

@@ -803,6 +803,39 @@ def tf_workspace(path_prefix="", tf_repo_name=""):
       strip_prefix = "rules_android-0.1.1",
   )
 
+  tf_http_archive(
+      name = "ngraph",
+      urls = [
+          "https://mirror.bazel.build/github.com/NervanaSystems/ngraph/archive/v0.5.0.tar.gz",
+          "https://github.com/NervanaSystems/ngraph/archive/v0.5.0.tar.gz",
+      ],
+      sha256 = "cb35d3d98836f615408afd18371fb13e3400711247e0d822ba7f306c45e9bb2c",
+      strip_prefix = "ngraph-0.5.0",
+      build_file = clean_dep("//third_party/ngraph:ngraph.BUILD"),
+  )
+
+  tf_http_archive(
+      name = "nlohmann_json_lib",
+      urls = [
+          "https://mirror.bazel.build/github.com/nlohmann/json/archive/v3.1.1.tar.gz",
+          "https://github.com/nlohmann/json/archive/v3.1.1.tar.gz",
+      ],
+      sha256 = "9f3549824af3ca7e9707a2503959886362801fb4926b869789d6929098a79e47",
+      strip_prefix = "json-3.1.1",
+      build_file = clean_dep("//third_party/ngraph:nlohmann_json.BUILD"),
+  )
+
+  tf_http_archive(
+      name = "ngraph_tf",
+      urls = [
+          "https://mirror.bazel.build/github.com/NervanaSystems/ngraph-tf/archive/v0.3.0-rc0.tar.gz",
+          "https://github.com/NervanaSystems/ngraph-tf/archive/v0.3.0-rc0.tar.gz"
+      ],
+      sha256 = "c09a35d0a605afeeaf5aad81181a6abc7e9b9e39312e8fdfbae20cbd8eb58523",
+      strip_prefix = "ngraph-tf-0.3.0-rc0",
+      build_file = clean_dep("//third_party/ngraph:ngraph_tf.BUILD"),
+  )
+
   ##############################################################################
   # BIND DEFINITIONS
   #

third_party/ngraph/BUILD

@@ -0,0 +1 @@
+licenses(["notice"])  # 3-Clause BSD

third_party/ngraph/LICENSE

@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "{}"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright {yyyy} {name of copyright owner}
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

third_party/ngraph/NGRAPH_LICENSE

@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "{}"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright {yyyy} {name of copyright owner}
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

third_party/ngraph/build_defs.bzl

@@ -0,0 +1,16 @@
+def clean_dep(dep):
+  return str(Label(dep))
+
+def if_ngraph(a):
+    """Shorthand for select()'ing on whether we're building with nGraph support.
+
+    Returns a select statement which evaluates to if_true if we're building
+    with nGraph.  Otherwise, the select statement evaluates to default.
+
+    """
+    ret_val = select({
+        clean_dep("//tensorflow:with_ngraph_support"): a,
+        "//conditions:default": []
+    })
+
+    return ret_val

third_party/ngraph/ngraph.BUILD

@@ -0,0 +1,45 @@
+licenses(["notice"])  # 3-Clause BSD
+
+exports_files(["license.txt"])
+
+filegroup(
+    name = "LICENSE",
+    srcs = [
+        "license.txt",
+    ],
+    visibility = ["//visibility:public"],
+)
+
+cc_library(
+    name = "ngraph_core",
+    srcs = glob([
+            "src/ngraph/*.cpp",
+            "src/ngraph/autodiff/*.cpp",
+            "src/ngraph/builder/*.cpp",
+            "src/ngraph/descriptor/*.cpp",
+            "src/ngraph/descriptor/layout/*.cpp",
+            "src/ngraph/op/*.cpp",
+            "src/ngraph/op/util/*.cpp",
+            "src/ngraph/pattern/*.cpp",
+            "src/ngraph/pattern/*.hpp",
+            "src/ngraph/pass/*.cpp",
+            "src/ngraph/pass/*.hpp",
+            "src/ngraph/runtime/*.cpp",
+            "src/ngraph/type/*.cpp",
+            "src/ngraph/runtime/interpreter/*.cpp",
+            "src/ngraph/runtime/interpreter/*.hpp",
+        ]),
+    hdrs = glob(["src/ngraph/**/*.hpp"]),
+    deps = [
+        "@eigen_archive//:eigen",
+        "@nlohmann_json_lib",
+    ],
+    copts = [
+        "-I external/ngraph/src",
+        "-I external/nlohmann_json_lib/include/",
+        '-D SHARED_LIB_EXT=\\".so\\"',
+        '-D NGRAPH_VERSION=\\"0.5.0\\"',
+    ],
+    visibility = ["//visibility:public"],
+    alwayslink=1
+)

third_party/ngraph/ngraph_tf.BUILD

@@ -0,0 +1,96 @@
+licenses(["notice"])  # 3-Clause BSD
+
+exports_files(["license.txt"])
+
+filegroup(
+    name = "LICENSE",
+    srcs = [
+        "license.txt",
+    ],
+    visibility = ["//visibility:public"],
+)
+
+load(
+    "@org_tensorflow//tensorflow:tensorflow.bzl",
+    "tf_cc_test"
+)
+
+cc_library(
+    name = "ngraph_libs_linux",
+    srcs = [
+        "lib/libiomp5.so",
+        "lib/libmklml_intel.so",
+    ],
+    visibility = ["//visibility:public"],
+)
+
+cc_library(
+    name = "ngraph_tf",
+    srcs = 
+    [
+        "src/ngraph_builder.h",
+        "src/ngraph_builder.cc",
+        "src/ngraph_cluster.h",
+        "src/ngraph_cluster.cc",
+        "src/ngraph_cluster_manager.h",
+        "src/ngraph_cluster_manager.cc",
+        "src/ngraph_confirm_pass.cc",
+        "src/ngraph_device.cc",
+        "src/ngraph_encapsulate_op.cc",
+        "src/ngraph_encapsulate_pass.cc",
+        "src/ngraph_freshness_tracker.h",
+        "src/ngraph_freshness_tracker.cc",
+        "src/ngraph_graph_rewrite_passes.cc",
+        "src/ngraph_liberate_pass.cc",
+        "src/ngraph_op_kernels.cc",
+        "src/ngraph_stub_ops.cc",
+        "src/ngraph_utils.h",
+        "src/ngraph_utils.cc",
+        "src/ngraph_send_recv_ops.cc",
+        "src/ngraph_variable_ops.cc",
+        "src/tf_graphcycles.cc",
+        "logging/ngraph_log.h",
+        "logging/ngraph_log.cc",
+        "logging/tf_graph_writer.h",
+        "logging/tf_graph_writer.cc",
+    ],
+    hdrs = [
+        "src/tf_graphcycles.h"
+    ],
+    deps = [
+        "@org_tensorflow//tensorflow/core:protos_all_proto_text",
+        "@org_tensorflow//tensorflow/core:framework_headers_lib",
+        "@org_tensorflow//tensorflow/core:core_cpu_headers_lib",
+        "@ngraph//:ngraph_core"
+    ],
+    copts = [
+        "-I external/ngraph_tf/src",
+        "-I external/ngraph_tf/logging",
+        "-I external/ngraph/src",
+        "-D NGRAPH_EMBEDDED_IN_TENSORFLOW=1",
+    ],
+    visibility = ["//visibility:public"],
+)
+
+tf_cc_test(
+    name = "ngraph_tf_tests",
+    size = "small",
+    srcs = [
+        "test/tf_exec.cpp",
+        "test/main.cpp",
+    ],
+    deps = [
+        ":ngraph_tf",
+        "@com_google_googletest//:gtest",
+        "@org_tensorflow//tensorflow/cc:cc_ops",
+        "@org_tensorflow//tensorflow/cc:client_session",
+        "@org_tensorflow//tensorflow/core:tensorflow",
+    ],
+    extra_copts = [
+        "-fexceptions ",
+        "-D NGRAPH_EMBEDDED_IN_TENSORFLOW=1",
+        "-I external/ngraph_tf/src",
+        "-I external/ngraph_tf/logging",
+        "-I external/ngraph/src",
+    ],
+)

third_party/ngraph/nlohmann_json.BUILD

@@ -0,0 +1,23 @@
+licenses(["notice"])  # 3-Clause BSD
+
+exports_files(["license.txt"])
+
+filegroup(
+    name = "LICENSE",
+    srcs = [
+        "license.txt",
+    ],
+    visibility = ["//visibility:public"],
+)
+
+cc_library(
+    name = "nlohmann_json_lib",
+    hdrs = glob([
+        "include/nlohmann/**/*.hpp",
+    ]),
+    copts = [
+        "-I external/nlohmann_json_lib",
+    ],
+    visibility = ["//visibility:public"],
+    alwayslink=1
+)