1 files changed, 21 insertions, 3 deletions
diff --git a/contrib/llvm-project/clang/lib/AST/Decl.cpp b/contrib/llvm-project/clang/lib/AST/Decl.cpp
index 68a9dca7d1f8..8580cc639d2d 100644
--- a/contrib/llvm-project/clang/lib/AST/Decl.cpp
+++ b/contrib/llvm-project/clang/lib/AST/Decl.cpp
@@ -3717,8 +3717,13 @@ const IdentifierInfo *FunctionDecl::getLiteralIdentifier() const {
 FunctionDecl::TemplatedKind FunctionDecl::getTemplatedKind() const {
   if (TemplateOrSpecialization.isNull())
     return TK_NonTemplate;
-  if (TemplateOrSpecialization.is<FunctionTemplateDecl *>())
+  if (const auto *ND = TemplateOrSpecialization.dyn_cast<NamedDecl *>()) {
+    if (isa<FunctionDecl>(ND))
+      return TK_DependentNonTemplate;
+    assert(isa<FunctionTemplateDecl>(ND) &&
+           "No other valid types in NamedDecl");
     return TK_FunctionTemplate;
+  }
   if (TemplateOrSpecialization.is<MemberSpecializationInfo *>())
     return TK_MemberSpecialization;
   if (TemplateOrSpecialization.is<FunctionTemplateSpecializationInfo *>())
@@ -3759,15 +3764,28 @@ FunctionDecl::setInstantiationOfMemberFunction(ASTContext &C,
 }
 
 FunctionTemplateDecl *FunctionDecl::getDescribedFunctionTemplate() const {
-  return TemplateOrSpecialization.dyn_cast<FunctionTemplateDecl *>();
+  return dyn_cast_or_null<FunctionTemplateDecl>(
+      TemplateOrSpecialization.dyn_cast<NamedDecl *>());
 }
 
-void FunctionDecl::setDescribedFunctionTemplate(FunctionTemplateDecl *Template) {
+void FunctionDecl::setDescribedFunctionTemplate(
+    FunctionTemplateDecl *Template) {
   assert(TemplateOrSpecialization.isNull() &&
          "Member function is already a specialization");
   TemplateOrSpecialization = Template;
 }
 
+void FunctionDecl::setInstantiatedFromDecl(FunctionDecl *FD) {
+  assert(TemplateOrSpecialization.isNull() &&
+         "Function is already a specialization");
+  TemplateOrSpecialization = FD;
+}
+
+FunctionDecl *FunctionDecl::getInstantiatedFromDecl() const {
+  return dyn_cast_or_null<FunctionDecl>(
+      TemplateOrSpecialization.dyn_cast<NamedDecl *>());
+}
+
 bool FunctionDecl::isImplicitlyInstantiable() const {
   // If the function is invalid, it can't be implicitly instantiated.
   if (isInvalidDecl())