1 // Cross comdat example
2 // Both the parent and child VTablea are in their own comdat sections.
3
4 // RUN: %clang_cc1 %s -triple=aarch64 -S -o - -emit-llvm -fexperimental-relative-c++-abi-vtables | FileCheck %s
5 // RUN: %clang_cc1 %s -triple=x86_64 -S -o - -emit-llvm -fexperimental-relative-c++-abi-vtables | FileCheck %s
6
7 // Comdats are emitted for both A and B in this module and for their respective implementations of foo().
8 // CHECK: $_ZN1A3fooEv = comdat any
9 // CHECK: $_ZN1B3fooEv = comdat any
10 // CHECK: $_ZTV1A = comdat any
11 // CHECK: $_ZTS1A = comdat any
12 // CHECK: $_ZTI1A = comdat any
13 // CHECK: $_ZTI1A.rtti_proxy = comdat any
14 // CHECK: $_ZTV1B = comdat any
15 // CHECK: $_ZTS1B = comdat any
16 // CHECK: $_ZTI1B = comdat any
17 // CHECK: $_ZTI1B.rtti_proxy = comdat any
18
19 // Both the vtables for A and B are emitted and in their own comdats.
20 // CHECK: @_ZTV1A.local = linkonce_odr hidden unnamed_addr constant { [3 x i32] } { [3 x i32] [i32 0, i32 trunc (i64 sub (i64 ptrtoint ({ i8*, i8* }** @_ZTI1A.rtti_proxy to i64), i64 ptrtoint (i32* getelementptr inbounds ({ [3 x i32] }, { [3 x i32] }* @_ZTV1A.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (void (%class.A*)* dso_local_equivalent @_ZN1A3fooEv to i64), i64 ptrtoint (i32* getelementptr inbounds ({ [3 x i32] }, { [3 x i32] }* @_ZTV1A.local, i32 0, i32 0, i32 2) to i64)) to i32)] }, comdat($_ZTV1A), align 4
21 // CHECK: @_ZTV1B.local = linkonce_odr hidden 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)] }, comdat($_ZTV1B), align 4
22
23 // CHECK: @_ZTV1A = linkonce_odr unnamed_addr alias { [3 x i32] }, { [3 x i32] }* @_ZTV1A.local
24 // CHECK: @_ZTV1B = linkonce_odr unnamed_addr alias { [3 x i32] }, { [3 x i32] }* @_ZTV1B.local
25
26 // CHECK: declare void @_Z5A_fooP1A(%class.A*)
27
28 // The stubs and implementations for foo() are in their own comdat sections.
29 // CHECK: define linkonce_odr void @_ZN1A3fooEv(%class.A* {{.*}}%this) unnamed_addr #{{[0-9]+}} comdat
30
31 // CHECK: define linkonce_odr void @_ZN1B3fooEv(%class.B* {{.*}}%this) unnamed_addr #{{[0-9]+}} comdat
32
33 class A {
34 public:
foo()35 inline virtual void foo() {}
36 };
37 class B : public A {
38 public:
foo()39 inline void foo() override {}
40 };
41 void A_foo(A *a);
42
43 // func() is used so that the vtable for B is accessed when creating the instance.
func()44 void func() {
45 A a;
46 B b;
47 A_foo(&a);
48 A_foo(&b);
49 }
50