From 3b521a1e189b7eee051cf78c6981e7b869248eeb Mon Sep 17 00:00:00 2001
From: yujianfeng <yujianfeng5@huawei.com>
Date: Mon, 22 Mar 2021 09:14:36 +0800
Subject: [PATCH] Fix the case of negative index in GetitemDependReorder

---
 .../frontend/optimizer/irpass/item_tuple_or_list_eliminate.h | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/mindspore/ccsrc/frontend/optimizer/irpass/item_tuple_or_list_eliminate.h b/mindspore/ccsrc/frontend/optimizer/irpass/item_tuple_or_list_eliminate.h
index 2e7ac661471..ad6657218d7 100644
--- a/mindspore/ccsrc/frontend/optimizer/irpass/item_tuple_or_list_eliminate.h
+++ b/mindspore/ccsrc/frontend/optimizer/irpass/item_tuple_or_list_eliminate.h
@@ -370,7 +370,10 @@ class GetitemDependReorder : public AnfVisitor {
     int64_t idx = idx_value->value();
     if (abs->isa<abstract::AbstractTuple>()) {
       auto abs_tuple = abs->cast<abstract::AbstractTuplePtr>();
-      if (LongToSize(idx) >= abs_tuple->elements().size() || idx < 0) {
+      if (idx < 0) {
+        idx += abs_tuple->elements().size();
+      }
+      if (idx < 0 || LongToSize(idx) >= abs_tuple->elements().size()) {
         MS_LOG(EXCEPTION) << "The idx value " << idx << " of tuple_getitem node " << c_->DebugString()
                           << " is out of range.";
       }