[CI] separate out legacy as a stage (#3337)

Jenkinsfile

@@ -283,6 +283,17 @@ stage('Integration Test') {
       }
     }
   },
+  'legacy: GPU': {
+    node('GPU') {
+      ws('workspace/tvm/legacy-python-gpu') {
+        init_git()
+        unpack_lib('gpu', tvm_multilib)
+        timeout(time: max_time, unit: 'MINUTES') {
+          sh "${docker_run} ${ci_gpu} ./tests/scripts/task_python_legacy.sh"
+        }
+      }
+    }
+  },
   'docs: GPU': {
     node('GPU') {
       ws('workspace/tvm/docs-python-gpu') {

tests/scripts/task_python_frontend.sh

@@ -29,33 +29,6 @@ make cython3
 echo "Running relay TFLite frontend test..."
 python3 -m nose -v tests/python/frontend/tflite
 
-echo "Running nnvm unittest..."
-python3 -m nose -v nnvm/tests/python/unittest
-
-echo "Running nnvm compiler test..."
-python3 -m nose -v nnvm/tests/python/compiler
-
-echo "Running nnvm ONNX frontend test..."
-python3 -m nose -v nnvm/tests/python/frontend/onnx
-
-echo "Running nnvm MXNet frontend test..."
-python3 -m nose -v nnvm/tests/python/frontend/mxnet
-
-echo "Running nnvm Keras frontend test..."
-python3 -m nose -v nnvm/tests/python/frontend/keras
-
-echo "Running nnvm Tensorflow frontend test..."
-python3 -m nose -v nnvm/tests/python/frontend/tensorflow
-
-echo "Running nnvm CoreML frontend test..."
-python3 -m nose -v nnvm/tests/python/frontend/coreml
-
-echo "Running nnvm Caffe2 frontend test..."
-python3 -m nose -v nnvm/tests/python/frontend/caffe2
-
-echo "Running nnvm DarkNet frontend test..."
-python3 -m nose -v nnvm/tests/python/frontend/darknet || exit -1
-
 echo "Running relay MXNet frontend test..."
 python3 -m nose -v tests/python/frontend/mxnet
 
@@ -78,4 +51,4 @@ echo "Running relay caffe2 frontend test..."
 python3 -m nose -v tests/python/frontend/caffe2
 
 echo "Running relay DarkNet frontend test..."
-python3 -m nose -v tests/python/frontend/darknet || exit -1
+python3 -m nose -v tests/python/frontend/darknet

tests/scripts/task_python_legacy.sh

@@ -0,0 +1,55 @@
+#!/bin/bash
+# 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.
+
+# Test cases for legacy code, will be deprecated in the future.
+set -e
+set -u
+
+export PYTHONPATH=nnvm/python:python:topi/python
+export OMP_NUM_THREADS=1
+
+# Rebuild cython
+make cython3
+
+echo "Running nnvm unittest..."
+python3 -m nose -v nnvm/tests/python/unittest
+
+
+echo "Running nnvm compiler test..."
+python3 -m nose -v nnvm/tests/python/compiler
+
+echo "Running nnvm ONNX frontend test..."
+python3 -m nose -v nnvm/tests/python/frontend/onnx
+
+echo "Running nnvm MXNet frontend test..."
+python3 -m nose -v nnvm/tests/python/frontend/mxnet
+
+echo "Running nnvm DarkNet frontend test..."
+python3 -m nose -v nnvm/tests/python/frontend/darknet
+
+echo "Running nnvm Keras frontend test..."
+python3 -m nose -v nnvm/tests/python/frontend/keras
+
+echo "Running nnvm Tensorflow frontend test..."
+python3 -m nose -v nnvm/tests/python/frontend/tensorflow
+
+echo "Running nnvm CoreML frontend test..."
+python3 -m nose -v nnvm/tests/python/frontend/coreml
+
+echo "Running nnvm Caffe2 frontend test..."
+python3 -m nose -v nnvm/tests/python/frontend/caffe2