[clang] [clang][dataflow]Use dyn_cast_or_null instead cast to prevent crash (PR #68510)

[Qizhi Hu via cfe-commits]

https://github.com/jcsxky updated https://github.com/llvm/llvm-project/pull/68510

>From b0f13442dd6c41331f9ab43f1cd8ac6bbf0deabe Mon Sep 17 00:00:00 2001
From: huqizhi <huqizhi at feysh.com>
Date: Sun, 8 Oct 2023 16:00:29 +0800
Subject: [PATCH] [clang][analysis]Use dyn_cast_or_null instead cast to prevent
 crash

---
 .../FlowSensitive/Models/UncheckedOptionalAccessModel.cpp       | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/clang/lib/Analysis/FlowSensitive/Models/UncheckedOptionalAccessModel.cpp b/clang/lib/Analysis/FlowSensitive/Models/UncheckedOptionalAccessModel.cpp
index f61f26ff27804ec..3a20bdc4285aee9 100644
--- a/clang/lib/Analysis/FlowSensitive/Models/UncheckedOptionalAccessModel.cpp
+++ b/clang/lib/Analysis/FlowSensitive/Models/UncheckedOptionalAccessModel.cpp
@@ -599,7 +599,7 @@ void transferAssignment(const CXXOperatorCallExpr *E, BoolValue &HasValueVal,
                         LatticeTransferState &State) {
   assert(E->getNumArgs() > 0);
 
-  if (auto *Loc = cast<RecordStorageLocation>(
+  if (auto *Loc = dyn_cast_or_null<RecordStorageLocation>(
           State.Env.getStorageLocation(*E->getArg(0)))) {
     createOptionalValue(*Loc, HasValueVal, State.Env);