chore: import upstream snapshot with attribution

python/paddle/distributed/transpiler/details/program_utils.py

@@ -0,0 +1,44 @@
+# Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
+#
+# 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.
+
+
+def delete_ops(block, ops):
+    for op in ops:
+        try:
+            idx = list(block.ops).index(op)
+            block._remove_op(idx)
+        except Exception as e:
+            print(e)
+
+
+def find_op_by_input_arg(block, arg_name):
+    for index, op in enumerate(block.ops):
+        if arg_name in op.input_arg_names:
+            return index
+    return -1
+
+
+def find_op_by_output_arg(block, arg_name, reverse=False):
+    if reverse:
+        pos = len(block.ops) - 1
+        while pos >= 0:
+            op = block.ops[pos]
+            if arg_name in op.output_arg_names:
+                return pos
+            pos -= 1
+    else:
+        for index, op in enumerate(block.ops):
+            if arg_name in op.output_arg_names:
+                return index
+    return -1