From 4e3d4622b1e7bd419815510e5f7cd0f96595b2a3 Mon Sep 17 00:00:00 2001
From: Alexey Bataev <a.bataev@hotmail.com>
Date: Thu, 4 Jun 2020 17:33:13 -0400
Subject: [PATCH] Fix undefined behaviour when trying to deref nullptr.

---
 clang/lib/CodeGen/CodeGenFunction.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/clang/lib/CodeGen/CodeGenFunction.h b/clang/lib/CodeGen/CodeGenFunction.h
index 2b0ebad..cfd9950 100644
--- a/clang/lib/CodeGen/CodeGenFunction.h
+++ b/clang/lib/CodeGen/CodeGenFunction.h
@@ -684,18 +684,18 @@ public:
   /// Manages parent directive for scan directives.
   class ParentLoopDirectiveForScanRegion {
     CodeGenFunction &CGF;
-    const OMPExecutableDirective &ParentLoopDirectiveForScan;
+    const OMPExecutableDirective *ParentLoopDirectiveForScan;
 
   public:
     ParentLoopDirectiveForScanRegion(
         CodeGenFunction &CGF,
         const OMPExecutableDirective &ParentLoopDirectiveForScan)
         : CGF(CGF),
-          ParentLoopDirectiveForScan(*CGF.OMPParentLoopDirectiveForScan) {
+          ParentLoopDirectiveForScan(CGF.OMPParentLoopDirectiveForScan) {
       CGF.OMPParentLoopDirectiveForScan = &ParentLoopDirectiveForScan;
     }
     ~ParentLoopDirectiveForScanRegion() {
-      CGF.OMPParentLoopDirectiveForScan = &ParentLoopDirectiveForScan;
+      CGF.OMPParentLoopDirectiveForScan = ParentLoopDirectiveForScan;
     }
   };
 
-- 
2.7.4