dynamic-cast-always-null.cpp revision 1741d7b3c88eda8891d30f5c920d55dfd54c62f0 
1// RUN: %clang_cc1 -I%S %s -triple x86_64-apple-darwin10 -emit-llvm -fcxx-exceptions -fexceptions -std=c++0x -o - | FileCheck %s
2struct A { virtual ~A(); };
3struct B final : A { };
4struct C { virtual ~C(); int c; };
5
6// CHECK: @_Z1fP1B
7C *f(B* b) {
8  // CHECK-NOT: call i8* @__dynamic_cast
9  // CHECK: ret %struct.C* null
10  return dynamic_cast<C*>(b);
11}
12
13// CHECK: @_Z1fR1B
14C &f(B& b) {
15  // CHECK-NOT: call i8* @__dynamic_cast
16  // CHECK: call void @__cxa_bad_cast() noreturn
17  // CHECK: ret %struct.C* undef
18  return dynamic_cast<C&>(b);
19}
20