test/CodeGenCXX/dynamic-cast-hint.cpp

// RUN: %clang_cc1 -triple x86_64-apple-darwin12 -emit-llvm -o - %s | FileCheck %s

class A { virtual ~A() {} };
class B { virtual ~B() {} };

class C : A { char x; };
class D : public A { short y; };
class E : public A, public B { int z; };
class F : public virtual A { long long w; };
class G : virtual A { long long w; };

class H : public E { int a; };
class I : public F { char b; };

class J : public H { char q; };
class K : public C, public B { char q; };

class XA : public A { };
class XB : public A { };
class XC : public virtual A { };
class X : public XA, public XB, public XC { };

void test(A *a, B *b) {
  volatile C *ac = dynamic_cast<C *>(a);
// CHECK: i8* bitcast ({ i8*, i8* }* @_ZTI1A to i8*), i8* bitcast ({ i8*, i8*, i32, i32, i8*, i64 }* @_ZTI1C to i8*), i64 -2)
  volatile D *ad = dynamic_cast<D *>(a);
// CHECK: i8* bitcast ({ i8*, i8* }* @_ZTI1A to i8*), i8* bitcast ({ i8*, i8*, i8* }* @_ZTI1D to i8*), i64 0)
  volatile E *ae = dynamic_cast<E *>(a);
// CHECK: i8* bitcast ({ i8*, i8* }* @_ZTI1A to i8*), i8* bitcast ({ i8*, i8*, i32, i32, i8*, i64, i8*, i64 }* @_ZTI1E to i8*), i64 0)
  volatile F *af = dynamic_cast<F *>(a);
// CHECK: i8* bitcast ({ i8*, i8* }* @_ZTI1A to i8*), i8* bitcast ({ i8*, i8*, i32, i32, i8*, i64 }* @_ZTI1F to i8*), i64 -1)
  volatile G *ag = dynamic_cast<G *>(a);
// CHECK: i8* bitcast ({ i8*, i8* }* @_ZTI1A to i8*), i8* bitcast ({ i8*, i8*, i32, i32, i8*, i64 }* @_ZTI1G to i8*), i64 -2)
  volatile H *ah = dynamic_cast<H *>(a);
// CHECK: i8* bitcast ({ i8*, i8* }* @_ZTI1A to i8*), i8* bitcast ({ i8*, i8*, i8* }* @_ZTI1H to i8*), i64 0)
  volatile I *ai = dynamic_cast<I *>(a);
// CHECK: i8* bitcast ({ i8*, i8* }* @_ZTI1A to i8*), i8* bitcast ({ i8*, i8*, i8* }* @_ZTI1I to i8*), i64 -1)
  volatile J *aj = dynamic_cast<J *>(a);
// CHECK: i8* bitcast ({ i8*, i8* }* @_ZTI1A to i8*), i8* bitcast ({ i8*, i8*, i8* }* @_ZTI1J to i8*), i64 0)
  volatile K *ak = dynamic_cast<K *>(a);
// CHECK: i8* bitcast ({ i8*, i8* }* @_ZTI1A to i8*), i8* bitcast ({ i8*, i8*, i32, i32, i8*, i64, i8*, i64 }* @_ZTI1K to i8*), i64 -2)
  volatile X *ax = dynamic_cast<X *>(a);
// CHECK: i8* bitcast ({ i8*, i8* }* @_ZTI1A to i8*), i8* bitcast ({ i8*, i8*, i32, i32, i8*, i64, i8*, i64, i8*, i64 }* @_ZTI1X to i8*), i64 -1)

  volatile E *be = dynamic_cast<E *>(b);
// CHECK: i8* bitcast ({ i8*, i8* }* @_ZTI1B to i8*), i8* bitcast ({ i8*, i8*, i32, i32, i8*, i64, i8*, i64 }* @_ZTI1E to i8*), i64 8)
  volatile G *bg = dynamic_cast<G *>(b);
// CHECK: i8* bitcast ({ i8*, i8* }* @_ZTI1B to i8*), i8* bitcast ({ i8*, i8*, i32, i32, i8*, i64 }* @_ZTI1G to i8*), i64 -2)
  volatile J *bj = dynamic_cast<J *>(b);
// CHECK: i8* bitcast ({ i8*, i8* }* @_ZTI1B to i8*), i8* bitcast ({ i8*, i8*, i8* }* @_ZTI1J to i8*), i64 8)
  volatile K *bk = dynamic_cast<K *>(b);
// CHECK: i8* bitcast ({ i8*, i8* }* @_ZTI1B to i8*), i8* bitcast ({ i8*, i8*, i32, i32, i8*, i64, i8*, i64 }* @_ZTI1K to i8*), i64 16)
}