clang/test/CodeGenCXX/apple-kext-indirect-virtual-dtor-call.cpp

   1 // RUN: %clang_cc1 -triple x86_64-apple-darwin10 -fapple-kext -fno-rtti -disable-O0-optnone -emit-llvm -o - %s | FileCheck %s
   2
   3 // CHECK: @_ZTV5TemplIiE = internal unnamed_addr constant { [7 x ptr] } { [7 x ptr] [ptr null, ptr null, ptr @_ZN5TemplIiED1Ev, ptr @_ZN5TemplIiED0Ev, ptr @_ZN5TemplIiE1fEv, ptr @_ZN5TemplIiE1gEv, ptr null] }
   4
   5 struct B1 {
   6   virtual ~B1();
   7 };
   8
   9 B1::~B1() {}
  10
  11 void DELETE(B1 *pb1) {
  12   pb1->B1::~B1();
  13 }
  14 // CHECK-LABEL: define{{.*}} void @_ZN2B1D0Ev
  15 // CHECK: [[T1:%.*]] = load ptr, ptr getelementptr inbounds (ptr, ptr @_ZTV2B1, i64 2)
  16 // CHECK-NEXT: call void [[T1]](ptr {{[^,]*}} [[T2:%.*]])
  17 // CHECK-LABEL: define{{.*}} void @_Z6DELETEP2B1
  18 // CHECK: [[T3:%.*]] = load ptr, ptr getelementptr inbounds (ptr, ptr @_ZTV2B1, i64 2)
  19 // CHECK-NEXT:  call void [[T3]](ptr {{[^,]*}} [[T4:%.*]])
  20
  21 template<class T>
  22 struct Templ {
  23   virtual ~Templ(); // Out-of-line so that the destructor doesn't cause a vtable
  24   virtual void f() {}
  25   virtual void g() {}
  26 };
  27 template<class T>
  28 struct SubTempl : public Templ<T> {
  29   virtual ~SubTempl() {} // override
  30   virtual void f() {} // override
  31   virtual void g() {} // override
  32 };
  33
  34 void f(SubTempl<int>* t) {
  35   // Qualified calls go through the (qualified) vtable in apple-kext mode.
  36   // Since t's this pointer points to SubTempl's vtable, the call needs
  37   // to load Templ<int>'s vtable.  Hence, Templ<int>::g needs to be
  38   // instantiated in this TU, for it's referenced by the vtable.
  39   // (This happens only in apple-kext mode; elsewhere virtual calls can always
  40   // use the vtable pointer off this instead of having to load the vtable
  41   // symbol.)
  42   t->Templ::~Templ();
  43 }
  44
  45 // CHECK: getelementptr inbounds (ptr, ptr @_ZTV5TemplIiE, i64 2)
  46 // CHECK: declare void @_ZN5TemplIiED0Ev(ptr {{[^,]*}})
  47 // CHECK: define internal void @_ZN5TemplIiE1fEv(ptr {{[^,]*}} %this)
  48 // CHECK: define internal void @_ZN5TemplIiE1gEv(ptr {{[^,]*}} %this)