1 // Diamond inheritance.
2 // A more complicated multiple inheritance example that includes longer chain of inheritance and a common ancestor.
3
4 // RUN: %clang_cc1 %s -triple=aarch64-unknown-fuchsia -O1 -S -o - -emit-llvm -fexperimental-relative-c++-abi-vtables | FileCheck %s
5
6 // CHECK-DAG: %class.B = type { %class.A }
7 // CHECK-DAG: %class.A = type { i32 (...)** }
8 // CHECK-DAG: %class.C = type { %class.A }
9 // CHECK-DAG: %class.D = type { %class.B, %class.C }
10
11 // VTable for B should contain offset to top (0), RTTI pointer, A::foo(), and B::barB().
12 // CHECK: @_ZTV1B.local = private unnamed_addr constant { [4 x i32] } { [4 x i32] [i32 0, i32 trunc (i64 sub (i64 ptrtoint ({ i8*, i8*, i8* }** @_ZTI1B.rtti_proxy to i64), i64 ptrtoint (i32* getelementptr inbounds ({ [4 x i32] }, { [4 x i32] }* @_ZTV1B.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (void (%class.A*)* dso_local_equivalent @_ZN1A3fooEv to i64), i64 ptrtoint (i32* getelementptr inbounds ({ [4 x i32] }, { [4 x i32] }* @_ZTV1B.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (void (%class.B*)* dso_local_equivalent @_ZN1B4barBEv to i64), i64 ptrtoint (i32* getelementptr inbounds ({ [4 x i32] }, { [4 x i32] }* @_ZTV1B.local, i32 0, i32 0, i32 2) to i64)) to i32)] }, align 4
13
14 // VTable for C should contain offset to top (0), RTTI pointer, A::foo(), and C::barC().
15 // CHECK: @_ZTV1C.local = private unnamed_addr constant { [4 x i32] } { [4 x i32] [i32 0, i32 trunc (i64 sub (i64 ptrtoint ({ i8*, i8*, i8* }** @_ZTI1C.rtti_proxy to i64), i64 ptrtoint (i32* getelementptr inbounds ({ [4 x i32] }, { [4 x i32] }* @_ZTV1C.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (void (%class.A*)* dso_local_equivalent @_ZN1A3fooEv to i64), i64 ptrtoint (i32* getelementptr inbounds ({ [4 x i32] }, { [4 x i32] }* @_ZTV1C.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (void (%class.C*)* dso_local_equivalent @_ZN1C4barCEv to i64), i64 ptrtoint (i32* getelementptr inbounds ({ [4 x i32] }, { [4 x i32] }* @_ZTV1C.local, i32 0, i32 0, i32 2) to i64)) to i32)] }, align 4
16
17 // VTable for D should be similar to the mutiple inheritance example where this
18 // vtable contains 2 inner vtables:
19 // - 1st table containing D::foo(), B::barB(), and D::baz().
20 // - 2nd table containing a thunk to D::foo() and C::barC().
21 // CHECK: @_ZTV1D.local = private unnamed_addr constant { [5 x i32], [4 x i32] } { [5 x i32] [i32 0, i32 trunc (i64 sub (i64 ptrtoint ({ i8*, i8*, i32, i32, i8*, i64, i8*, i64 }** @_ZTI1D.rtti_proxy to i64), i64 ptrtoint (i32* getelementptr inbounds ({ [5 x i32], [4 x i32] }, { [5 x i32], [4 x i32] }* @_ZTV1D.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (void (%class.D*)* dso_local_equivalent @_ZN1D3fooEv to i64), i64 ptrtoint (i32* getelementptr inbounds ({ [5 x i32], [4 x i32] }, { [5 x i32], [4 x i32] }* @_ZTV1D.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (void (%class.B*)* dso_local_equivalent @_ZN1B4barBEv to i64), i64 ptrtoint (i32* getelementptr inbounds ({ [5 x i32], [4 x i32] }, { [5 x i32], [4 x i32] }* @_ZTV1D.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (void (%class.D*)* dso_local_equivalent @_ZN1D3bazEv to i64), i64 ptrtoint (i32* getelementptr inbounds ({ [5 x i32], [4 x i32] }, { [5 x i32], [4 x i32] }* @_ZTV1D.local, i32 0, i32 0, i32 2) to i64)) to i32)], [4 x i32] [i32 -8, i32 trunc (i64 sub (i64 ptrtoint ({ i8*, i8*, i32, i32, i8*, i64, i8*, i64 }** @_ZTI1D.rtti_proxy to i64), i64 ptrtoint (i32* getelementptr inbounds ({ [5 x i32], [4 x i32] }, { [5 x i32], [4 x i32] }* @_ZTV1D.local, i32 0, i32 1, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (void (%class.D*)* dso_local_equivalent @_ZThn8_N1D3fooEv to i64), i64 ptrtoint (i32* getelementptr inbounds ({ [5 x i32], [4 x i32] }, { [5 x i32], [4 x i32] }* @_ZTV1D.local, i32 0, i32 1, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (void (%class.C*)* dso_local_equivalent @_ZN1C4barCEv to i64), i64 ptrtoint (i32* getelementptr inbounds ({ [5 x i32], [4 x i32] }, { [5 x i32], [4 x i32] }* @_ZTV1D.local, i32 0, i32 1, i32 2) to i64)) to i32)] }, align 4
22
23 // @_ZTV1B = unnamed_addr alias { [4 x i32] }, { [4 x i32] }* @_ZTV1B.local
24 // @_ZTV1C = unnamed_addr alias { [4 x i32] }, { [4 x i32] }* @_ZTV1C.local
25 // @_ZTV1D = unnamed_addr alias { [5 x i32], [4 x i32] }, { [5 x i32], [4 x i32] }* @_ZTV1D.local
26
27 class A {
28 public:
29 virtual void foo();
30 };
31
32 class B : public A {
33 public:
34 virtual void barB();
35 };
36
37 class C : public A {
38 virtual void barC();
39 };
40
41 // Should be a struct with 2 arrays from 2 parents.
42 // The 1st contains D::foo(), B::barB(), and D::baz().
43 // The 2nd contains C::barC(), and a thunk that points to D::foo().
44 class D : public B, C {
45 public:
46 virtual void baz();
47 void foo() override;
48 };
49
barB()50 void B::barB() {}
barC()51 void C::barC() {}
foo()52 void D::foo() {}
baz()53 void D::baz() {}
54
D_foo(D * d)55 void D_foo(D *d) {
56 d->foo();
57 }
58