From c602006638a659b950be676f76aa95eddbbedfb3 Mon Sep 17 00:00:00 2001
From: Anders Carlsson <andersca@mac.com>
Date: Sun, 10 Apr 2011 20:33:22 +0000
Subject: As a first step towards fixing PR9641, add a CK_DynamicToNull cast
 kind which represents a dynamic cast where we know that the result is always
 null.

For example:

struct A {
  virtual ~A();
};
struct B final : A { };
struct C { };

bool f(B* b) {
  return dynamic_cast<C*>(b);
}

llvm-svn: 129256
---
 clang/lib/CodeGen/CGExprConstant.cpp | 1 +
 1 file changed, 1 insertion(+)

(limited to 'clang/lib/CodeGen/CGExprConstant.cpp')

diff --git a/clang/lib/CodeGen/CGExprConstant.cpp b/clang/lib/CodeGen/CGExprConstant.cpp
index 822a999b963..578a37f0fcf 100644
--- a/clang/lib/CodeGen/CGExprConstant.cpp
+++ b/clang/lib/CodeGen/CGExprConstant.cpp
@@ -552,6 +552,7 @@ public:
     case CK_GetObjCProperty:
     case CK_ToVoid:
     case CK_Dynamic:
+    case CK_DynamicToNull:
     case CK_ResolveUnknownAnyType:
       return 0;
 
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