IRgen: Add a stub class for generating ABI-specific C++ code.

This class only supports name mangling (which is apparently used during C/ObjC
codegen). For now only the Itanium C++ ABI is supported. Patches to add a
second C++ ABI are forthcoming.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@104630 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGCXX.cpp b/lib/CodeGen/CGCXX.cpp
index be4256a..5258779 100644
--- a/lib/CodeGen/CGCXX.cpp
+++ b/lib/CodeGen/CGCXX.cpp
@@ -13,6 +13,7 @@
 
 // We might split this into multiple files if it gets too unwieldy
 
+#include "CGCXXABI.h"
 #include "CodeGenFunction.h"
 #include "CodeGenModule.h"
 #include "Mangle.h"
@@ -333,3 +334,5 @@
 
   return ::BuildVirtualCall(*this, VTableIndex, This, Ty);
 }
+
+CXXABI::~CXXABI() {}