1 // Cross comdat example
2 // Parent VTable is in a comdat section.
3
4 // RUN: %clang_cc1 %s -triple=aarch64-unknown-fuchsia -O1 -S -o - -emit-llvm -fexperimental-relative-c++-abi-vtables | FileCheck %s
5
6 // The inline function is emitted in each module with the same comdat
7 // CHECK: $_ZTS1A = comdat any
8 // CHECK: $_ZTI1A = comdat any
9 // CHECK: $_ZTI1B.rtti_proxy = comdat any
10
11 // The VTable is emitted everywhere used
12 // CHECK: $_ZTV1A = comdat any
13 // CHECK: $_ZTI1A.rtti_proxy = comdat any
14
15 // The VTable for B is emitted here since it has a key function which is defined in this module
16 // CHECK: @_ZTV1B.local = private unnamed_addr constant { [3 x i32] } { [3 x i32] [i32 0, i32 trunc (i64 sub (i64 ptrtoint ({ i8*, i8*, i8* }** @_ZTI1B.rtti_proxy to i64), i64 ptrtoint (i32* getelementptr inbounds ({ [3 x i32] }, { [3 x i32] }* @_ZTV1B.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (void (%class.B*)* dso_local_equivalent @_ZN1B3fooEv to i64), i64 ptrtoint (i32* getelementptr inbounds ({ [3 x i32] }, { [3 x i32] }* @_ZTV1B.local, i32 0, i32 0, i32 2) to i64)) to i32)] }, align 4
17
18 // The VTable for A is emitted here and in a comdat section since it has no key function, and is used in this module when creating an instance of A (in func()).
19 // CHECK: @_ZTV1A.local = linkonce_odr hidden unnamed_addr constant { [3 x i32] } { [3 x i32] [i32 0, i32 trunc (i64 sub (i64 ptrtoint ({ i8*, i8* }** @_ZTI1A.rtti_proxy to i64), i64 ptrtoint (i32* getelementptr inbounds ({ [3 x i32] }, { [3 x i32] }* @_ZTV1A.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (void (%class.A*)* dso_local_equivalent @_ZN1A3fooEv to i64), i64 ptrtoint (i32* getelementptr inbounds ({ [3 x i32] }, { [3 x i32] }* @_ZTV1A.local, i32 0, i32 0, i32 2) to i64)) to i32)] }, comdat($_ZTV1A), align 4
20
21 // CHECK: @_ZTV1B = unnamed_addr alias { [3 x i32] }, { [3 x i32] }* @_ZTV1B.local
22 // CHECK: @_ZTV1A = linkonce_odr unnamed_addr alias { [3 x i32] }, { [3 x i32] }* @_ZTV1A.local
23
24 // CHECK: define void @_ZN1B3fooEv(%class.B* {{.*}}%this) unnamed_addr
25 // CHECK-NEXT: entry:
26 // CHECK-NEXT: ret void
27 // CHECK-NEXT: }
28
29 class A {
30 public:
foo()31 inline virtual void foo() {}
32 };
33 class B : public A {
34 public:
35 void foo() override;
36 };
37 void A_foo(A *a);
38
foo()39 void B::foo() {}
func2()40 void func2() {
41 A a;
42 A_foo(&a);
43 }
44