[ms-cxxabi] Give the MS inheritance attributes a base class

Required making a handful of changes to the table generator.  Also adds
an unspecified inheritance attribute.  This opens the path for us to
apply these attributes to C++ records implicitly.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@178054 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 11 insertions, 3 deletions

diff --git a/include/clang/Basic/Attr.td b/include/clang/Basic/Attr.td
index 47905bf8b1..37aa332b81 100644
--- a/include/clang/Basic/Attr.td
+++ b/include/clang/Basic/Attr.td
@@ -956,18 +956,26 @@ def Ptr64 : InheritableAttr {
   let Spellings = [Keyword<"__ptr64">];
 }
 
-def SingleInheritance : InheritableAttr {
+class MSInheritanceAttr : InheritableAttr;
+
+def SingleInheritance : MSInheritanceAttr {
   let Spellings = [Keyword<"__single_inheritance">];
 }
 
-def MultipleInheritance : InheritableAttr {
+def MultipleInheritance : MSInheritanceAttr {
   let Spellings = [Keyword<"__multiple_inheritance">];
 }
 
-def VirtualInheritance : InheritableAttr {
+def VirtualInheritance : MSInheritanceAttr {
   let Spellings = [Keyword<"__virtual_inheritance">];
 }
 
+// This attribute doesn't have any spellings, but we can apply it implicitly to
+// incomplete types that lack any of the other attributes.
+def UnspecifiedInheritance : MSInheritanceAttr {
+  let Spellings = [];
+}
+
 def Unaligned : IgnoredAttr {
   let Spellings = [Keyword<"__unaligned">];
 }