From 580138f1fe0e90882595dc20698fffa57094befc Mon Sep 17 00:00:00 2001
From: alouhahaha <wangjun289@huawei.com>
Date: Tue, 19 Jan 2021 11:31:23 +0800
Subject: [PATCH] bug fix for scalar input HCCL ops

---
 .../ccsrc/backend/optimizer/pass/communication_op_fusion.cc   | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/mindspore/ccsrc/backend/optimizer/pass/communication_op_fusion.cc b/mindspore/ccsrc/backend/optimizer/pass/communication_op_fusion.cc
index db356f7351..51959d2577 100644
--- a/mindspore/ccsrc/backend/optimizer/pass/communication_op_fusion.cc
+++ b/mindspore/ccsrc/backend/optimizer/pass/communication_op_fusion.cc
@@ -204,7 +204,9 @@ AnfNodePtr CommunicationOpFusion::CreateFusedCommunicationOp(const FuncGraphPtr
       auto cnode = communication_op_info.communication_op_nodes[idx];
       MS_EXCEPTION_IF_NULL(cnode);
       std::vector<size_t> shape = AnfAlgo::GetOutputInferShape(cnode, 0);
-      shape[0] /= rank_size;
+      if (!shape.empty()) {
+        shape[0] /= rank_size;
+      }
       shapes.push_back(shape);
     }
   }