diff --git a/clang/include/clang/AST/Stmt.h b/clang/include/clang/AST/Stmt.h
--- a/clang/include/clang/AST/Stmt.h
+++ b/clang/include/clang/AST/Stmt.h
@@ -2603,7 +2603,8 @@
   friend class ASTStmtReader;
 
   enum { INIT, CONDVAR, COND, INC, BODY, END_EXPR };
-  Stmt* SubExprs[END_EXPR]; // SubExprs[INIT] is an expression or declstmt.
+  Stmt *SubExprs[END_EXPR] = {
+      nullptr}; // SubExprs[INIT] is an expression or declstmt.
   SourceLocation LParenLoc, RParenLoc;
 
 public:
diff --git a/llvm/lib/Frontend/OpenMP/OMPIRBuilder.cpp b/llvm/lib/Frontend/OpenMP/OMPIRBuilder.cpp
--- a/llvm/lib/Frontend/OpenMP/OMPIRBuilder.cpp
+++ b/llvm/lib/Frontend/OpenMP/OMPIRBuilder.cpp
@@ -931,7 +931,7 @@
   (void)OutlinedFnID;
 
   // Return value of the runtime offloading call.
-  Value *Return;
+  Value *Return = nullptr;
 
   // Arguments for the target kernel.
   SmallVector<Value *> ArgsVector;