Use aliases for more constructors and destructors.

With this patch we produce alias for cases like

template<typename T>
struct foobar {
  foobar() {
  }
};
template struct foobar<void>;

We just have to be careful to produce the same aliases in every TU because
of comdats.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@194000 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CodeGenModule.h b/lib/CodeGen/CodeGenModule.h
index 25aaae6..249ad33 100644
--- a/lib/CodeGen/CodeGenModule.h
+++ b/lib/CodeGen/CodeGenModule.h
@@ -1034,7 +1034,8 @@
   
   // C++ related functions.
 
-  bool TryEmitDefinitionAsAlias(GlobalDecl Alias, GlobalDecl Target);
+  bool TryEmitDefinitionAsAlias(GlobalDecl Alias, GlobalDecl Target,
+                                bool InEveryTU);
   bool TryEmitBaseDestructorAsAlias(const CXXDestructorDecl *D);
 
   void EmitNamespace(const NamespaceDecl *D);