From 49c9bd769bca9fbbeec17a421d63ea5742fdf985 Mon Sep 17 00:00:00 2001
From: zhoufeng <zhoufeng54@huawei.com>
Date: Mon, 29 Jun 2020 17:46:32 +0800
Subject: [PATCH] vm no process empty graph

Signed-off-by: zhoufeng <zhoufeng54@huawei.com>
---
 mindspore/ccsrc/session/ascend_session.cc | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/mindspore/ccsrc/session/ascend_session.cc b/mindspore/ccsrc/session/ascend_session.cc
index a8626a202b..288fe0bbb8 100644
--- a/mindspore/ccsrc/session/ascend_session.cc
+++ b/mindspore/ccsrc/session/ascend_session.cc
@@ -289,6 +289,12 @@ GraphId AscendSession::CompileGraph(NotNull<FuncGraphPtr> func_graph) {
   std::vector<KernelGraphPtr> all_graphs;
   auto root_graph = ConstructKernelGraph(func_graph, &all_graphs);
   BackendOptimization(all_graphs);
+  // empty graph dont entry to backend
+  if (root_graph->execution_order().empty()) {
+    MS_LOG(INFO) << root_graph->ToString() << " is empty graph.";
+    InitRuntimeResource();
+    return root_graph->graph_id();
+  }
   // split switch
   SplitGraphs(NOT_NULL(root_graph));
   // insert goto labels and label_sets