From dcbf2e8e65b9d3e7ad9353c7456ae8a878dd70ad Mon Sep 17 00:00:00 2001
From: "Joel E. Denny" <jdenny.ornl@gmail.com>
Date: Wed, 16 May 2018 14:51:18 +0000
Subject: [PATCH] [Attr] Don't print fake MSInheritance argument

This was discovered at:

http://lists.llvm.org/pipermail/cfe-commits/Week-of-Mon-20180514/228390.html

Reviewed by: aaron.ballman

https://reviews.llvm.org/D46905

llvm-svn: 332474
---
 clang/include/clang/Basic/Attr.td | 5 +++--
 clang/test/SemaCXX/attr-print.cpp | 9 +++++++++
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/clang/include/clang/Basic/Attr.td b/clang/include/clang/Basic/Attr.td
index afd1e01..d72544f 100644
--- a/clang/include/clang/Basic/Attr.td
+++ b/clang/include/clang/Basic/Attr.td
@@ -184,7 +184,8 @@ class VersionArgument<string name, bit opt = 0> : Argument<name, opt>;
 class AlignedArgument<string name, bit opt = 0> : Argument<name, opt>;
 
 // A bool argument with a default value
-class DefaultBoolArgument<string name, bit default> : BoolArgument<name, 1> {
+class DefaultBoolArgument<string name, bit default, bit fake = 0>
+    : BoolArgument<name, 1, fake> {
   bit Default = default;
 }
 
@@ -2624,7 +2625,7 @@ def UPtr : TypeAttr {
 
 def MSInheritance : InheritableAttr {
   let LangOpts = [MicrosoftExt];
-  let Args = [DefaultBoolArgument<"BestCase", 1>];
+  let Args = [DefaultBoolArgument<"BestCase", /*default*/1, /*fake*/1>];
   let Spellings = [Keyword<"__single_inheritance">,
                    Keyword<"__multiple_inheritance">,
                    Keyword<"__virtual_inheritance">,
diff --git a/clang/test/SemaCXX/attr-print.cpp b/clang/test/SemaCXX/attr-print.cpp
index f40d803..960050b 100644
--- a/clang/test/SemaCXX/attr-print.cpp
+++ b/clang/test/SemaCXX/attr-print.cpp
@@ -34,3 +34,12 @@ class __attribute__((consumable(unknown))) AttrTester1 {
   // CHECK: void callableWhen() __attribute__((callable_when("unconsumed", "consumed")));
   void callableWhen()  __attribute__((callable_when("unconsumed", "consumed")));
 };
+
+// CHECK: class __single_inheritance SingleInheritance;
+class __single_inheritance SingleInheritance;
+
+// CHECK: class __multiple_inheritance MultipleInheritance;
+class __multiple_inheritance MultipleInheritance;
+
+// CHECK: class __virtual_inheritance VirtualInheritance;
+class __virtual_inheritance VirtualInheritance;
-- 
2.7.4