[clang] Support PointerAuthQualifier in QualType

Author: kovdan01

clang/include/clang/AST/ASTContext.h

@@ -2182,6 +2182,16 @@ class ASTContext : public RefCountedBase<ASTContext> {
     return getQualifiedType(type.getUnqualifiedType(), Qs);
   }
 
+  /// \brief Return a type with the given __ptrauth qualifier.
+  QualType getPointerAuthType(QualType type, PointerAuthQualifier pointerAuth) {
+    assert(!type.getPointerAuth());
+    assert(pointerAuth);
+
+    Qualifiers qs;
+    qs.setPointerAuth(pointerAuth);
+    return getQualifiedType(type, qs);
+  }
+
   unsigned char getFixedPointScale(QualType Ty) const;
   unsigned char getFixedPointIBits(QualType Ty) const;
   llvm::FixedPointSemantics getFixedPointSemantics(QualType Ty) const;

clang/include/clang/AST/Type.h

@@ -1434,6 +1434,10 @@ class QualType {
   // true when Type is objc's weak and weak is enabled but ARC isn't.
   bool isNonWeakInMRRWithObjCWeak(const ASTContext &Context) const;
 
+  PointerAuthQualifier getPointerAuth() const {
+    return getQualifiers().getPointerAuth();
+  }
+
   enum PrimitiveDefaultInitializeKind {
     /// The type does not fall into any of the following categories. Note that
     /// this case is zero-valued so that values of this enum can be used as a