diff --git a/libcxxabi/src/demangle/ItaniumDemangle.h b/libcxxabi/src/demangle/ItaniumDemangle.h
--- a/libcxxabi/src/demangle/ItaniumDemangle.h
+++ b/libcxxabi/src/demangle/ItaniumDemangle.h
@@ -370,6 +370,10 @@
   VendorExtQualType(const Node *Ty_, StringView Ext_, const Node *TA_)
       : Node(KVendorExtQualType), Ty(Ty_), Ext(Ext_), TA(TA_) {}
 
+  const Node *getTy() const { return Ty; }
+  StringView getExt() const { return Ext; }
+  const Node *getTA() const { return TA; }
+
   template <typename Fn> void match(Fn F) const { F(Ty, Ext, TA); }
 
   void printLeft(OutputBuffer &OB) const override {
@@ -418,6 +422,9 @@
              Child_->ArrayCache, Child_->FunctionCache),
         Quals(Quals_), Child(Child_) {}
 
+  Qualifiers getQuals() const { return Quals; }
+  const Node *getChild() const { return Child; }
+
   template<typename Fn> void match(Fn F) const { F(Child, Quals); }
 
   bool hasRHSComponentSlow(OutputBuffer &OB) const override {
@@ -586,6 +593,8 @@
       : Node(KPointerType, Pointee_->RHSComponentCache),
         Pointee(Pointee_) {}
 
+  const Node *getPointee() const { return Pointee; }
+
   template<typename Fn> void match(Fn F) const { F(Pointee); }
 
   bool hasRHSComponentSlow(OutputBuffer &OB) const override {
@@ -1071,6 +1080,9 @@
   VectorType(const Node *BaseType_, const Node *Dimension_)
       : Node(KVectorType), BaseType(BaseType_), Dimension(Dimension_) {}
 
+  const Node *getBaseType() const { return BaseType; }
+  const Node *getDimension() const { return Dimension; }
+
   template<typename Fn> void match(Fn F) const { F(BaseType, Dimension); }
 
   void printLeft(OutputBuffer &OB) const override {
diff --git a/llvm/include/llvm/Demangle/ItaniumDemangle.h b/llvm/include/llvm/Demangle/ItaniumDemangle.h
--- a/llvm/include/llvm/Demangle/ItaniumDemangle.h
+++ b/llvm/include/llvm/Demangle/ItaniumDemangle.h
@@ -13,8 +13,8 @@
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef LLVM_DEMANGLE_ITANIUMDEMANGLE_H
-#define LLVM_DEMANGLE_ITANIUMDEMANGLE_H
+#ifndef DEMANGLE_ITANIUMDEMANGLE_H
+#define DEMANGLE_ITANIUMDEMANGLE_H
 
 #include "DemangleConfig.h"
 #include "StringView.h"
@@ -26,6 +26,7 @@
 #include <cstdlib>
 #include <cstring>
 #include <limits>
+#include <new>
 #include <utility>
 
 DEMANGLE_NAMESPACE_BEGIN
@@ -5489,4 +5490,4 @@
 
 DEMANGLE_NAMESPACE_END
 
-#endif // LLVM_DEMANGLE_ITANIUMDEMANGLE_H
+#endif // DEMANGLE_ITANIUMDEMANGLE_H
diff --git a/llvm/include/llvm/Demangle/StringView.h b/llvm/include/llvm/Demangle/StringView.h
--- a/llvm/include/llvm/Demangle/StringView.h
+++ b/llvm/include/llvm/Demangle/StringView.h
@@ -13,8 +13,8 @@
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef LLVM_DEMANGLE_STRINGVIEW_H
-#define LLVM_DEMANGLE_STRINGVIEW_H
+#ifndef DEMANGLE_STRINGVIEW_H
+#define DEMANGLE_STRINGVIEW_H
 
 #include "DemangleConfig.h"
 #include <cassert>
diff --git a/llvm/include/llvm/Demangle/Utility.h b/llvm/include/llvm/Demangle/Utility.h
--- a/llvm/include/llvm/Demangle/Utility.h
+++ b/llvm/include/llvm/Demangle/Utility.h
@@ -13,8 +13,8 @@
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef LLVM_DEMANGLE_UTILITY_H
-#define LLVM_DEMANGLE_UTILITY_H
+#ifndef DEMANGLE_UTILITY_H
+#define DEMANGLE_UTILITY_H
 
 #include "StringView.h"
 #include <array>