1 // Cross comdat example
2 // Parent VTable is in a comdat section.
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 // A::foo() has a comdat since it is an inline function
8 // CHECK: $_ZN1A3fooEv = comdat any
9 // CHECK: $_ZTV1A = comdat any
10 // CHECK: $_ZTS1A = comdat any
11
12 // The VTable for A has its own comdat section bc it has no key function
13 // CHECK: $_ZTI1A = comdat any
14 // CHECK: $_ZTI1A.rtti_proxy = comdat any
15
16 // The VTable for A is emitted here and in a comdat section since it has no key function, and is used in this module when creating an instance of A.
17 // CHECK: @_ZTV1A.local = linkonce_odr hidden unnamed_addr constant { [3 x i32] } { [3 x i32] [i32 0, i32 trunc (i64 sub (i64 ptrtoint ({ i8*, i8* }** @_ZTI1A.rtti_proxy to i64), i64 ptrtoint (i32* getelementptr inbounds ({ [3 x i32] }, { [3 x i32] }* @_ZTV1A.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (void (%class.A*)* dso_local_equivalent @_ZN1A3fooEv to i64), i64 ptrtoint (i32* getelementptr inbounds ({ [3 x i32] }, { [3 x i32] }* @_ZTV1A.local, i32 0, i32 0, i32 2) to i64)) to i32)] }, comdat($_ZTV1A), align 4
18 // CHECK: @_ZTVN10__cxxabiv117__class_type_infoE = external global i8*
19 // CHECK: @_ZTS1A = linkonce_odr constant [3 x i8] c"1A\00", comdat, align 1
20 // CHECK: @_ZTI1A = linkonce_odr constant { i8*, i8* } { i8* getelementptr inbounds (i8, i8* bitcast (i8** @_ZTVN10__cxxabiv117__class_type_infoE to i8*), i32 8), i8* getelementptr inbounds ([3 x i8], [3 x i8]* @_ZTS1A, i32 0, i32 0) }, comdat, align 8
21 // CHECK: @_ZTI1A.rtti_proxy = hidden unnamed_addr constant { i8*, i8* }* @_ZTI1A, comdat
22 // CHECK: @_ZTV1A = linkonce_odr unnamed_addr alias { [3 x i32] }, { [3 x i32] }* @_ZTV1A.local
23
24 // CHECK: define linkonce_odr void @_ZN1A3fooEv(%class.A* {{.*}}%this) unnamed_addr #{{[0-9]+}} comdat
25
26 class A {
27 public:
foo()28 inline virtual void foo() {}
29 };
30 class B : public A {
31 public:
32 void foo() override;
33 };
34 void A_foo(A *a);
35
A_foo(A * a)36 void A_foo(A *a) { a->foo(); }
37
38 // func() is only used to emit a vtable.
func()39 void func() {
40 A a;
41 A_foo(&a);
42 }
43