hmz007
36ed224bac
Signed-off-by: hmz007 <hmz007@gmail.com> Change-Id: Ib87fdbe7a0be7dc961af3500fe9ea4589a127f9f
27 lines
708 B
C++
27 lines
708 B
C++
// RUN: %clang_cc1 -emit-llvm %s -verify -fno-rtti -triple %itanium_abi_triple -o - | FileCheck %s
|
|
// expected-no-diagnostics
|
|
|
|
struct A {
|
|
virtual ~A(){};
|
|
};
|
|
|
|
struct B : public A {
|
|
B() : A() {}
|
|
};
|
|
|
|
// An upcast can be resolved statically and can be used with -fno-rtti, iff it
|
|
// does not use runtime support.
|
|
A *upcast(B *b) {
|
|
return dynamic_cast<A *>(b);
|
|
// CHECK-LABEL: define {{.*}}%struct.A* @_Z6upcastP1B
|
|
// CHECK-NOT: call {{.*}}i8* @__dynamic_cast
|
|
}
|
|
|
|
// A NoOp dynamic_cast can be used with -fno-rtti iff it does not use
|
|
// runtime support.
|
|
B *samecast(B *b) {
|
|
return dynamic_cast<B *>(b);
|
|
// CHECK-LABEL: define {{.*}}%struct.B* @_Z8samecastP1B
|
|
// CHECK-NOT: call {{.*}}i8* @__dynamic_cast
|
|
}
|