[ms-cxxabi] Fix linkage of dtor thunks for anonymous classes

We were mistakengly giving linkonce_odr linkage instead of internal
linkage to the deleting and complete destructor thunks for classes in
anonymous namespaces.

Fixes PR17273.

llvm-svn: 197060

1 files changed, 15 insertions, 0 deletions

diff --git a/clang/test/CodeGenCXX/microsoft-abi-structors.cpp b/clang/test/CodeGenCXX/microsoft-abi-structors.cpp
index c2f1395f47d..71cc31d9aec 100644
--- a/clang/test/CodeGenCXX/microsoft-abi-structors.cpp
+++ b/clang/test/CodeGenCXX/microsoft-abi-structors.cpp
@@ -299,3 +299,18 @@ void call_nv_deleting_dtor(D *d) {
 }
 
 }
+
+// Dtor thunks for classes in anonymous namespaces should be internal, not
+// linkonce_odr.
+namespace {
+struct A {
+  virtual ~A() { }
+};
+}
+void *getA() {
+  return (void*)new A();
+}
+// CHECK: define internal x86_thiscallcc void @"\01??_GA@?A@@UAEPAXI@Z"
+// CHECK:               (%"struct.<anonymous namespace>::A"* %this, i32 %should_call_delete)
+// CHECK: define internal x86_thiscallcc void @"\01??1A@?A@@UAE@XZ"
+// CHECK:               (%"struct.<anonymous namespace>::A"* %this)