| // Cross comdat example |
| // Both the parent and child VTablea are in their own comdat sections. |
| |
| // RUN: %clang_cc1 %s -triple=aarch64 -S -o - -emit-llvm -fexperimental-relative-c++-abi-vtables | FileCheck %s |
| // RUN: %clang_cc1 %s -triple=x86_64 -S -o - -emit-llvm -fexperimental-relative-c++-abi-vtables | FileCheck %s |
| |
| // Comdats are emitted for both A and B in this module and for their respective implementations of foo(). |
| // CHECK: $_ZN1A3fooEv = comdat any |
| // CHECK: $_ZN1B3fooEv = comdat any |
| // CHECK: $_ZTV1A = comdat any |
| // CHECK: $_ZTS1A = comdat any |
| // CHECK: $_ZTI1A = comdat any |
| // CHECK: $_ZTI1A.rtti_proxy = comdat any |
| // CHECK: $_ZTV1B = comdat any |
| // CHECK: $_ZTS1B = comdat any |
| // CHECK: $_ZTI1B = comdat any |
| // CHECK: $_ZTI1B.rtti_proxy = comdat any |
| |
| // Both the vtables for A and B are emitted and in their own comdats. |
| // CHECK: @_ZTV1A.local = linkonce_odr hidden unnamed_addr constant { [3 x i32] } { [3 x i32] [i32 0, i32 trunc (i64 sub (i64 ptrtoint ({ i8*, i8* }** @_ZTI1A.rtti_proxy to i64), i64 ptrtoint (i32* getelementptr inbounds ({ [3 x i32] }, { [3 x i32] }* @_ZTV1A.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (void (%class.A*)* dso_local_equivalent @_ZN1A3fooEv to i64), i64 ptrtoint (i32* getelementptr inbounds ({ [3 x i32] }, { [3 x i32] }* @_ZTV1A.local, i32 0, i32 0, i32 2) to i64)) to i32)] }, comdat($_ZTV1A), align 4 |
| // 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 |
| |
| // CHECK: @_ZTV1A = linkonce_odr unnamed_addr alias { [3 x i32] }, { [3 x i32] }* @_ZTV1A.local |
| // CHECK: @_ZTV1B = linkonce_odr unnamed_addr alias { [3 x i32] }, { [3 x i32] }* @_ZTV1B.local |
| |
| // CHECK: declare void @_Z5A_fooP1A(%class.A*) |
| |
| // The stubs and implementations for foo() are in their own comdat sections. |
| // CHECK: define linkonce_odr void @_ZN1A3fooEv(%class.A* {{.*}}%this) unnamed_addr #{{[0-9]+}} comdat |
| |
| // CHECK: define linkonce_odr void @_ZN1B3fooEv(%class.B* {{.*}}%this) unnamed_addr #{{[0-9]+}} comdat |
| |
| class A { |
| public: |
| inline virtual void foo() {} |
| }; |
| class B : public A { |
| public: |
| inline void foo() override {} |
| }; |
| void A_foo(A *a); |
| |
| // func() is used so that the vtable for B is accessed when creating the instance. |
| void func() { |
| A a; |
| B b; |
| A_foo(&a); |
| A_foo(&b); |
| } |