clang/test/CodeGenCXX/virtual-destructor-calls.cpp

   1 // RUN: %clang_cc1 -emit-llvm %s -o - -triple=x86_64-apple-darwin10 -mconstructor-aliases -O1 -disable-llvm-passes | FileCheck %s
   2
   3 struct Member {
   4   ~Member();
   5 };
   6
   7 struct A {
   8   virtual ~A();
   9 };
  10
  11 struct B : A {
  12   Member m;
  13   virtual ~B();
  14 };
  15
  16 // Complete dtor: just an alias because there are no virtual bases.
  17 // CHECK: @_ZN1BD1Ev ={{.*}} unnamed_addr alias {{.*}} @_ZN1BD2Ev
  18
  19 // (aliases from C)
  20 // CHECK: @_ZN1CD2Ev ={{.*}} unnamed_addr alias {{.*}}, bitcast {{.*}} @_ZN1BD2Ev
  21 // CHECK: @_ZN1CD1Ev ={{.*}} unnamed_addr alias {{.*}} @_ZN1CD2Ev
  22
  23 // Base dtor: actually calls A's base dtor.
  24 // CHECK-LABEL: define{{.*}} void @_ZN1BD2Ev(%struct.B* {{[^,]*}} %this) unnamed_addr
  25 // CHECK: call void @_ZN6MemberD1Ev
  26 // CHECK: call void @_ZN1AD2Ev
  27
  28 // Deleting dtor: defers to the complete dtor.
  29 // CHECK-LABEL: define{{.*}} void @_ZN1BD0Ev(%struct.B* {{[^,]*}} %this) unnamed_addr
  30 // CHECK: call void @_ZN1BD1Ev
  31 // CHECK: call void @_ZdlPv
  32
  33 B::~B() { }
  34
  35 struct C : B {
  36   ~C();
  37 };
  38
  39 C::~C() { }
  40
  41 // Complete dtor: just an alias (checked above).
  42
  43 // Deleting dtor: defers to the complete dtor.
  44 // CHECK-LABEL: define{{.*}} void @_ZN1CD0Ev(%struct.C* {{[^,]*}} %this) unnamed_addr
  45 // CHECK: call void @_ZN1CD1Ev
  46 // CHECK: call void @_ZdlPv
  47
  48 // Base dtor: just an alias to B's base dtor.
  49
  50 namespace PR12798 {
  51   // A qualified call to a base class destructor should not undergo virtual
  52   // dispatch. Template instantiation used to lose the qualifier.
  53   struct A { virtual ~A(); };
  54   template<typename T> void f(T *p) { p->A::~A(); }
  55
  56   // CHECK: define {{.*}} @_ZN7PR127981fINS_1AEEEvPT_(
  57   // CHECK: call void @_ZN7PR127981AD1Ev(
  58   template void f(A*);
  59 }