[TARGET] ONNX codegen (apache#5052)

* Relay to ONNX converter

* Relay to ONNX op test cases

* Relay to ONNX end to end model test cases

* Add test cases to jenkins

* CI CD fixes

* ONNX codegen

* ONNX codegen

* ONNX codegen

* onnx testcases

* ONNX codegen

* test onnx

* ONNX codegen

* shape calculation

* move onnx codegen to contrib/target

* review comments

* ONNX target use visitor

* onnx fixes

* lint fixes

* doc string changes

* review comments

* review comment fixes

* review comment

* pytest skip

* rename type to node type

* test

* Fix for constantshpae, add exp, fix for metadatamodule

* Fix cpplint

* change error tol values

CMakeLists.txt

@@ -72,6 +72,7 @@ tvm_option(USE_CPP_RPC "Build CPP RPC" OFF)
 tvm_option(USE_TFLITE "Build with tflite support" OFF)
 tvm_option(USE_TENSORFLOW_PATH "TensorFlow root path when use TFLite" none)
 tvm_option(USE_COREML "Build with coreml support" OFF)
+tvm_option(USE_TARGET_ONNX "Build with ONNX Codegen support" OFF)
 
 if(USE_CPP_RPC AND UNIX)
   message(FATAL_ERROR "USE_CPP_RPC is only supported with WIN32. Use the Makefile for non-Windows.")
@@ -344,6 +345,7 @@ include(cmake/modules/contrib/HybridDump.cmake)
 include(cmake/modules/contrib/TFLite.cmake)
 include(cmake/modules/contrib/TF_TVMDSOOP.cmake)
 include(cmake/modules/contrib/CoreML.cmake)
+include(cmake/modules/contrib/ONNX.cmake)
 
 include(CheckCXXCompilerFlag)
 if(NOT MSVC)

cmake/config.cmake

@@ -227,5 +227,9 @@ set(USE_FALLBACK_STL_MAP OFF)
 set(USE_HEXAGON_DEVICE OFF)
 set(USE_HEXAGON_SDK /path/to/sdk)
 
+# Whether to use ONNX codegen
+set(USE_TARGET_ONNX OFF)
+
 # Whether to compile the standalone C runtime.
 set(USE_STANDALONE_CRT ON)
+

cmake/modules/contrib/ONNX.cmake

@@ -0,0 +1,22 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you 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.
+
+if(USE_TARGET_ONNX)
+  message(STATUS "Build with contrib.codegen_onnx")
+  file(GLOB ONNX_CONTRIB_SRC src/runtime/contrib/onnx/onnx_module.cc)
+  list(APPEND RUNTIME_SRCS ${ONNX_CONTRIB_SRC})
+endif(USE_TARGET_ONNX)

python/tvm/contrib/target/__init__.py

@@ -14,5 +14,3 @@
 # KIND, either express or implied.  See the License for the
 # specific language governing permissions and limitations
 # under the License.
-"""Codegen and runtime APIs for targets.
-"""