1 files changed, 33 insertions, 0 deletions
diff --git a/test/CodeGenCXX/ms_struct.cpp b/test/CodeGenCXX/ms_struct.cpp
new file mode 100644
index 0000000..32307ba
--- /dev/null
+++ b/test/CodeGenCXX/ms_struct.cpp
@@ -0,0 +1,33 @@
+// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -emit-llvm %s -o - | FileCheck %s
+
+// rdar://20636558
+
+#pragma GCC diagnostic ignored "-Wincompatible-ms-struct"
+#define ATTR __attribute__((__ms_struct__))
+
+struct ATTR VBase {
+  virtual void foo() = 0;
+};
+
+struct ATTR Base : virtual VBase {
+  virtual void bar() = 0;
+};
+
+struct ATTR Derived : Base {
+  Derived();
+  void foo();
+  void bar();
+  int value;
+};
+
+// CHECK: [[DERIVED:%.*]] = type <{ [[BASE:%.*]], i32, [4 x i8] }>
+// CHECK: [[BASE]] = type { [[VBASE:%.*]] }
+// CHECK: [[VBASE]] = type { i32 (...)** }
+
+// CHECK: define void @_ZN7DerivedC2Ev
+// CHECK:   [[SELF:%.*]] = load [[DERIVED]]*
+// CHECK:   [[T0:%.*]] = bitcast [[DERIVED]]* [[SELF]] to [[BASE]]*
+// CHECK:   call void @_ZN4BaseC2Ev([[BASE]]* [[T0]], i8**
+// CHECK:   [[T0:%.*]] = getelementptr inbounds {{.*}} [[SELF]], i32 0, i32 1
+// CHECK:   store i32 20, i32* [[T0]],
+Derived::Derived() : value(20) {}