1 files changed, 9 insertions, 16 deletions

diff --git a/lib/Sema/SemaLookup.cpp b/lib/Sema/SemaLookup.cpp
index f257a499d4..003c525e9f 100644
--- a/lib/Sema/SemaLookup.cpp
+++ b/lib/Sema/SemaLookup.cpp
@@ -528,22 +528,17 @@ static bool LookupBuiltin(Sema &S, LookupResult &R) {
 
 /// \brief Determine whether we can declare a special member function within
 /// the class at this point.
-static bool CanDeclareSpecialMemberFunction(ASTContext &Context,
-                                            const CXXRecordDecl *Class) {
+static bool CanDeclareSpecialMemberFunction(const CXXRecordDecl *Class) {
   // We need to have a definition for the class.
   if (!Class->getDefinition() || Class->isDependentContext())
     return false;
 
   // We can't be in the middle of defining the class.
-  if (const RecordType *RecordTy
-                        = Context.getTypeDeclType(Class)->getAs<RecordType>())
-    return !RecordTy->isBeingDefined();
-
-  return false;
+  return !Class->isBeingDefined();
 }
 
 void Sema::ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class) {
-  if (!CanDeclareSpecialMemberFunction(Context, Class))
+  if (!CanDeclareSpecialMemberFunction(Class))
     return;
 
   // If the default constructor has not yet been declared, do so now.
@@ -602,8 +597,7 @@ static void DeclareImplicitMemberFunctionsWithName(Sema &S,
   switch (Name.getNameKind()) {
   case DeclarationName::CXXConstructorName:
     if (const CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(DC))
-      if (Record->getDefinition() &&
-          CanDeclareSpecialMemberFunction(S.Context, Record)) {
+      if (Record->getDefinition() && CanDeclareSpecialMemberFunction(Record)) {
         CXXRecordDecl *Class = const_cast<CXXRecordDecl *>(Record);
         if (Record->needsImplicitDefaultConstructor())
           S.DeclareImplicitDefaultConstructor(Class);
@@ -618,7 +612,7 @@ static void DeclareImplicitMemberFunctionsWithName(Sema &S,
   case DeclarationName::CXXDestructorName:
     if (const CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(DC))
       if (Record->getDefinition() && !Record->hasDeclaredDestructor() &&
-          CanDeclareSpecialMemberFunction(S.Context, Record))
+          CanDeclareSpecialMemberFunction(Record))
         S.DeclareImplicitDestructor(const_cast<CXXRecordDecl *>(Record));
     break;
 
@@ -627,8 +621,7 @@ static void DeclareImplicitMemberFunctionsWithName(Sema &S,
       break;
 
     if (const CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(DC)) {
-      if (Record->getDefinition() &&
-          CanDeclareSpecialMemberFunction(S.Context, Record)) {
+      if (Record->getDefinition() && CanDeclareSpecialMemberFunction(Record)) {
         CXXRecordDecl *Class = const_cast<CXXRecordDecl *>(Record);
         if (!Record->hasDeclaredCopyAssignment())
           S.DeclareImplicitCopyAssignment(Class);
@@ -2233,9 +2226,9 @@ Sema::SpecialMemberOverloadResult *Sema::LookupSpecialMember(CXXRecordDecl *RD,
                                                             bool RValueThis,
                                                             bool ConstThis,
                                                             bool VolatileThis) {
-  RD = RD->getDefinition();
-  assert((RD && !RD->isBeingDefined()) &&
+  assert(CanDeclareSpecialMemberFunction(RD) &&
          "doing special member lookup into record that isn't fully complete");
+  RD = RD->getDefinition();
   if (RValueThis || ConstThis || VolatileThis)
     assert((SM == CXXCopyAssignment || SM == CXXMoveAssignment) &&
            "constructors and destructors always have unqualified lvalue this");
@@ -2451,7 +2444,7 @@ CXXConstructorDecl *Sema::LookupMovingConstructor(CXXRecordDecl *Class,
 /// \brief Look up the constructors for the given class.
 DeclContext::lookup_result Sema::LookupConstructors(CXXRecordDecl *Class) {
   // If the implicit constructors have not yet been declared, do so now.
-  if (CanDeclareSpecialMemberFunction(Context, Class)) {
+  if (CanDeclareSpecialMemberFunction(Class)) {
     if (Class->needsImplicitDefaultConstructor())
       DeclareImplicitDefaultConstructor(Class);
     if (!Class->hasDeclaredCopyConstructor())