From: David Majnemer <david.majnemer@gmail.com>
Date: Wed, 6 Jul 2016 21:07:42 +0000 (+0000)
Subject: [CodeView] Unions are always sealed
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=cc3da7f637666cdb26e619479d490ba073b93182;p=llvm

[CodeView] Unions are always sealed

It is impossible to inherit from a union.  We are missing a way to
represent this in IR for classes/structs...

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@274675 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp b/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp
index fe63b7043c5..cb4310836dd 100644
--- a/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp
+++ b/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp
@@ -1536,7 +1536,7 @@ TypeIndex CodeViewDebug::lowerTypeUnion(const DICompositeType *Ty) {
 }
 
 TypeIndex CodeViewDebug::lowerCompleteTypeUnion(const DICompositeType *Ty) {
-  ClassOptions CO = getCommonClassOptions(Ty);
+  ClassOptions CO = ClassOptions::Sealed | getCommonClassOptions(Ty);
   TypeIndex FieldTI;
   unsigned FieldCount;
   bool ContainsNestedClass;
diff --git a/test/DebugInfo/COFF/types-data-members.ll b/test/DebugInfo/COFF/types-data-members.ll
index 70a509714b6..759a5e54644 100644
--- a/test/DebugInfo/COFF/types-data-members.ll
+++ b/test/DebugInfo/COFF/types-data-members.ll
@@ -161,8 +161,9 @@
 ; CHECK:   Union (0x100B) {
 ; CHECK:     TypeLeafKind: LF_UNION (0x1506)
 ; CHECK:     MemberCount: 2
-; CHECK:     Properties [ (0x200)
+; CHECK:     Properties [ (0x600)
 ; CHECK:       HasUniqueName (0x200)
+; CHECK:       Sealed (0x400)
 ; CHECK:     ]
 ; CHECK:     FieldList: <field list> (0x100A)
 ; CHECK:     SizeOf: 4