clang/test/CodeGenCXX/dllimport-dtor-thunks.cpp

   1 // RUN: %clang_cc1 -mconstructor-aliases %s -triple x86_64-windows-msvc -fms-extensions -emit-llvm -o - | FileCheck %s
   2
   3 // PR32990
   4
   5 // Introduces the virtual destructor. We should use the base destructor
   6 // directly, no thunk needed.
   7 struct __declspec(dllimport) ImportIntroVDtor {
   8   virtual ~ImportIntroVDtor() {}
   9 };
  10
  11 struct BaseClass {
  12   virtual ~BaseClass() {}
  13 };
  14
  15 // Non-virtually inherits from a non-dllimport base class. We should again call
  16 // the derived base constructor directly. No need for the complete (aka vbase)
  17 // destructor.
  18 struct __declspec(dllimport) ImportOverrideVDtor : public BaseClass {
  19   virtual ~ImportOverrideVDtor() {}
  20 };
  21
  22 // Virtually inherits from a non-dllimport base class. In this case, we can
  23 // expect the DLL to provide a definition of the complete dtor. See
  24 // dllexport-dtor-thunks.cpp.
  25 struct __declspec(dllimport) ImportVBaseOverrideVDtor
  26     : public virtual BaseClass {
  27   virtual ~ImportVBaseOverrideVDtor() {}
  28 };
  29
  30 extern "C" void testit() {
  31   ImportIntroVDtor t1;
  32   ImportOverrideVDtor t2;
  33   ImportVBaseOverrideVDtor t3;
  34 }
  35
  36 // The destructors are called in reverse order of construction. Only the third
  37 // needs the complete destructor (_D).
  38 // CHECK-LABEL: define dso_local void @testit()
  39 // CHECK:  call void @"??_DImportVBaseOverrideVDtor@@QEAAXXZ"(ptr {{[^,]*}} %{{.*}})
  40 // CHECK:  call void @"??1ImportOverrideVDtor@@UEAA@XZ"(ptr {{[^,]*}} %{{.*}})
  41 // CHECK:  call void @"??1ImportIntroVDtor@@UEAA@XZ"(ptr {{[^,]*}} %{{.*}})
  42
  43 // CHECK-LABEL: declare dllimport void @"??_DImportVBaseOverrideVDtor@@QEAAXXZ"
  44 // CHECK-LABEL: declare dllimport void @"??1ImportOverrideVDtor@@UEAA@XZ"
  45 // CHECK-LABEL: declare dllimport void @"??1ImportIntroVDtor@@UEAA@XZ"