1 // RUN: %clang_cc1 -emit-llvm %s -verify -fno-rtti -o - | FileCheck %s 2 // expected-no-diagnostics 3 4 struct A { 5 virtual ~A(){}; 6 }; 7 8 struct B : public A { 9 B() : A() {} 10 }; 11 12 // An upcast can be resolved statically and can be used with -fno-rtti, iff it 13 // does not use runtime support. 14 A *upcast(B *b) { 15 return dynamic_cast<A *>(b); 16 // CHECK: define %struct.A* @_Z6upcastP1B 17 // CHECK-NOT: call i8* @__dynamic_cast 18 } 19 20 // A NoOp dynamic_cast can be used with -fno-rtti iff it does not use 21 // runtime support. 22 B *samecast(B *b) { 23 return dynamic_cast<B *>(b); 24 // CHECK: define %struct.B* @_Z8samecastP1B 25 // CHECK-NOT: call i8* @__dynamic_cast 26 } 27
