virtual-destructor-calls.cpp
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// RUN: %clang_cc1 -emit-llvm %s -o - -triple=x86_64-apple-darwin10 -mconstructor-aliases -O1 -disable-llvm-passes | FileCheck %s
struct Member {
~Member();
};
struct A {
virtual ~A();
};
struct B : A {
Member m;
virtual ~B();
};
// Complete dtor: just an alias because there are no virtual bases.
// CHECK: @_ZN1BD1Ev = unnamed_addr alias {{.*}} @_ZN1BD2Ev
// (aliases from C)
// CHECK: @_ZN1CD2Ev = unnamed_addr alias {{.*}}, bitcast {{.*}} @_ZN1BD2Ev
// CHECK: @_ZN1CD1Ev = unnamed_addr alias {{.*}} @_ZN1CD2Ev
// Base dtor: actually calls A's base dtor.
// CHECK-LABEL: define void @_ZN1BD2Ev(%struct.B* %this) unnamed_addr
// CHECK: call void @_ZN6MemberD1Ev
// CHECK: call void @_ZN1AD2Ev
// Deleting dtor: defers to the complete dtor.
// CHECK-LABEL: define void @_ZN1BD0Ev(%struct.B* %this) unnamed_addr
// CHECK: call void @_ZN1BD1Ev
// CHECK: call void @_ZdlPv
B::~B() { }
struct C : B {
~C();
};
C::~C() { }
// Complete dtor: just an alias (checked above).
// Deleting dtor: defers to the complete dtor.
// CHECK-LABEL: define void @_ZN1CD0Ev(%struct.C* %this) unnamed_addr
// CHECK: call void @_ZN1CD1Ev
// CHECK: call void @_ZdlPv
// Base dtor: just an alias to B's base dtor.
namespace PR12798 {
// A qualified call to a base class destructor should not undergo virtual
// dispatch. Template instantiation used to lose the qualifier.
struct A { virtual ~A(); };
template<typename T> void f(T *p) { p->A::~A(); }
// CHECK: define {{.*}} @_ZN7PR127981fINS_1AEEEvPT_(
// CHECK: call void @_ZN7PR127981AD1Ev(
template void f(A*);
}