Add mangling for covariant thunks.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@80747 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/Mangle.h b/lib/CodeGen/Mangle.h
index fd88679..41629c4 100644
--- a/lib/CodeGen/Mangle.h
+++ b/lib/CodeGen/Mangle.h
@@ -36,6 +36,10 @@
                   llvm::raw_ostream &os);
   void mangleThunk(const NamedDecl *D, bool Virtual, int64_t n, int64_t vn,
                    ASTContext &Context, llvm::raw_ostream &os);
+  void mangleCovariantThunk(const NamedDecl *D, bool VirtualThis, int64_t nv_t,
+                          int64_t v_t, bool VirtualResult, int64_t nv_r,
+                          int64_t v_r, ASTContext &Context,
+                          llvm::raw_ostream &os);
   void mangleGuardVariable(const VarDecl *D, ASTContext &Context,
                            llvm::raw_ostream &os);
   void mangleCXXVtable(QualType T, ASTContext &Context, llvm::raw_ostream &os);