dllimport-dtor-thunks.cpp
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// RUN: %clang_cc1 -mconstructor-aliases %s -triple x86_64-windows-msvc -fms-extensions -emit-llvm -o - | FileCheck %s
// PR32990
// Introduces the virtual destructor. We should use the base destructor
// directly, no thunk needed.
struct __declspec(dllimport) ImportIntroVDtor {
virtual ~ImportIntroVDtor() {}
};
struct BaseClass {
virtual ~BaseClass() {}
};
// Non-virtually inherits from a non-dllimport base class. We should again call
// the derived base constructor directly. No need for the complete (aka vbase)
// destructor.
struct __declspec(dllimport) ImportOverrideVDtor : public BaseClass {
virtual ~ImportOverrideVDtor() {}
};
// Virtually inherits from a non-dllimport base class. In this case, we can
// expect the DLL to provide a definition of the complete dtor. See
// dllexport-dtor-thunks.cpp.
struct __declspec(dllimport) ImportVBaseOverrideVDtor
: public virtual BaseClass {
virtual ~ImportVBaseOverrideVDtor() {}
};
extern "C" void testit() {
ImportIntroVDtor t1;
ImportOverrideVDtor t2;
ImportVBaseOverrideVDtor t3;
}
// The destructors are called in reverse order of construction. Only the third
// needs the complete destructor (_D).
// CHECK-LABEL: define dso_local void @testit()
// CHECK: call void @"??_DImportVBaseOverrideVDtor@@QEAAXXZ"(%struct.ImportVBaseOverrideVDtor* %{{.*}})
// CHECK: call void @"??1ImportOverrideVDtor@@UEAA@XZ"(%struct.ImportOverrideVDtor* %{{.*}})
// CHECK: call void @"??1ImportIntroVDtor@@UEAA@XZ"(%struct.ImportIntroVDtor* %{{.*}})
// CHECK-LABEL: declare dllimport void @"??_DImportVBaseOverrideVDtor@@QEAAXXZ"
// CHECK-LABEL: declare dllimport void @"??1ImportOverrideVDtor@@UEAA@XZ"
// CHECK-LABEL: declare dllimport void @"??1ImportIntroVDtor@@UEAA@XZ"