From 74605a9f226ea2426cb6217207e39b5cc8e51ca2 Mon Sep 17 00:00:00 2001
From: chenfei <chefei52@huawei.com>
Date: Thu, 4 Mar 2021 20:04:21 +0800
Subject: [PATCH] return if is_once_ is true

---
 mindspore/ccsrc/frontend/optimizer/opt.cc | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/mindspore/ccsrc/frontend/optimizer/opt.cc b/mindspore/ccsrc/frontend/optimizer/opt.cc
index e9c557a4d2..03b42ab474 100644
--- a/mindspore/ccsrc/frontend/optimizer/opt.cc
+++ b/mindspore/ccsrc/frontend/optimizer/opt.cc
@@ -184,6 +184,9 @@ bool SubstitutionList::ApplyIRToSubstitutions(const OptimizerPtr &optimizer, con
     for (auto &substitution : list_) {
       auto res = DoTransform(optimizer, node, substitution);
       if (res != nullptr) {
+        if (is_once_) {
+          return true;
+        }
         change = true;
         changes = true;
         node = res;
@@ -229,6 +232,9 @@ bool SubstitutionList::ApplySubstitutionToIR(const OptimizerPtr &optimizer, cons
       changes = true;
       node = res;
     }
+    if (change && is_once_) {
+      return true;
+    }
     UpdateTransformingList(optimizer, node, &todo, change, seen);
   }