llvm-project/clang/test/CodeGenCXX/apple-kext-indirect-call-2.cpp

// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -fapple-kext -fno-rtti -emit-llvm -o - %s | FileCheck %s

// CHECK: @_ZTV1A = unnamed_addr constant [4 x i8*] [i8* null, i8* null, i8* bitcast (i8* (%struct.A*)* @_ZNK1A3abcEv to i8*), i8* null]
// CHECK: @_ZTV4Base = unnamed_addr constant [4 x i8*] [i8* null, i8* null, i8* bitcast (i8* (%struct.Base*)* @_ZNK4Base3abcEv to i8*), i8* null]
// CHECK: @_ZTV8Derived2 = unnamed_addr constant [5 x i8*] [i8* null, i8* null, i8* null, i8* bitcast (i8* (%struct.Derived2*)* @_ZNK8Derived23efgEv to i8*), i8* null]
// CHECK: @_ZTV2D2 = unnamed_addr constant [5 x i8*] [i8* null, i8* null, i8* null, i8* bitcast (i8* (%struct.D2*)* @_ZNK2D23abcEv to i8*), i8* null]

struct A {
  virtual const char* abc(void) const;
};

const char* A::abc(void) const {return "A"; };

struct B : virtual A {
  virtual void VF();
};

void B::VF() {}

void FUNC(B* p) {
// CHECK: [[T1:%.*]] = load i8* (%struct.A*)*, i8* (%struct.A*)** getelementptr inbounds (i8* (%struct.A*)** bitcast ([4 x i8*]* @_ZTV1A to i8* (%struct.A*)**), i64 2)
// CHECK-NEXT:  [[T2:%.*]] = call i8* [[T1]]
  const char* c = p->A::abc();
}


// Test2
struct Base { virtual char* abc(void) const; };

char* Base::abc() const { return 0; }

struct Derived : public Base {
};

void FUNC1(Derived* p) {
// CHECK: [[U1:%.*]] = load i8* (%struct.Base*)*, i8* (%struct.Base*)** getelementptr inbounds (i8* (%struct.Base*)** bitcast ([4 x i8*]* @_ZTV4Base to i8* (%struct.Base*)**), i64 2)
// CHECK-NEXT:  [[U2:%.*]] = call i8* [[U1]]
  char* c = p->Base::abc();
}


// Test3
struct Base2 { };

struct Derived2 : virtual Base2 {
  virtual char* efg(void) const;
};

char* Derived2::efg(void) const { return 0; }

void FUNC2(Derived2* p) {
// CHECK: [[V1:%.*]] = load i8* (%struct.Derived2*)*, i8* (%struct.Derived2*)** getelementptr inbounds (i8* (%struct.Derived2*)** bitcast ([5 x i8*]* @_ZTV8Derived2 to i8* (%struct.Derived2*)**), i64 3)
// CHECK-NEXT:  [[V2:%.*]] = call i8* [[V1]]
  char* c = p->Derived2::efg();
}

// Test4
struct Base3 { };

struct D1 : virtual Base3 {
};

struct D2 : virtual Base3 {
 virtual char *abc(void) const;
};

struct Sub : D1, D2 {
};

char* D2::abc(void) const { return 0; }

void FUNC3(Sub* p) {
// CHECK: [[W1:%.*]] = load i8* (%struct.D2*)*, i8* (%struct.D2*)** getelementptr inbounds (i8* (%struct.D2*)** bitcast ([5 x i8*]* @_ZTV2D2 to i8* (%struct.D2*)**), i64 3)
// CHECK-NEXT:  [[W2:%.*]] = call i8* [[W1]]
  char* c = p->D2::abc();
}