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

1 files changed, 96 insertions, 0 deletions

diff --git a/third_party/ngraph/ngraph_tf.BUILD b/third_party/ngraph/ngraph_tf.BUILD
new file mode 100644
index 0000000000..bbac74db0f
--- /dev/null
+++ b/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",
+    ],
+)