From 41282c8e3955cf1f704fdb7d71bcff9470aefa0a Mon Sep 17 00:00:00 2001
From: Fred Chow <fred.chow@yandex.com>
Date: Mon, 10 May 2021 19:11:55 -0700
Subject: [PATCH] Guard against the alias elem being NADS

---
 src/mapleall/maple_me/include/alias_class.h | 4 ++++
 src/mapleall/maple_me/src/alias_class.cpp   | 2 +-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/mapleall/maple_me/include/alias_class.h b/src/mapleall/maple_me/include/alias_class.h
index 9759470764..474762badd 100644
--- a/src/mapleall/maple_me/include/alias_class.h
+++ b/src/mapleall/maple_me/include/alias_class.h
@@ -45,6 +45,10 @@ class AliasElem {
     return ost;
   }
 
+  OriginalSt *GetOst() {
+    return &ost;
+  }
+
   bool IsNotAllDefsSeen() const {
     return notAllDefsSeen;
   }
diff --git a/src/mapleall/maple_me/src/alias_class.cpp b/src/mapleall/maple_me/src/alias_class.cpp
index 43ceb93074..0e9718de64 100644
--- a/src/mapleall/maple_me/src/alias_class.cpp
+++ b/src/mapleall/maple_me/src/alias_class.cpp
@@ -172,7 +172,7 @@ AliasElem *AliasClass::FindOrCreateExtraLevAliasElem(BaseNode &expr, TyIdx tyIdx
     if (ainfo.ae == nullptr) {
       return nullptr;
     }
-  } else if (ainfo.ae == nullptr) {
+  } else if (ainfo.ae == nullptr || IsNullOrDummySymbolOst(ainfo.ae->GetOst())) {
     return FindOrCreateDummyNADSAe();
   }
   OriginalSt *newOst = nullptr;
-- 
Gitee