| // Check the vtable layout for classes with key functions defined in different |
| // translation units. This TU only manifests the vtable for A. |
| |
| // RUN: %clang_cc1 %s -triple=aarch64-unknown-fuchsia -O1 -S -o - -emit-llvm -fexperimental-relative-c++-abi-vtables | FileCheck %s |
| |
| #include "cross-tu-header.h" |
| |
| // CHECK: $_ZN1A3fooEv.stub = comdat any |
| // CHECK: $_ZN1A3barEv.stub = comdat any |
| // CHECK: $_ZTI1A.rtti_proxy = comdat any |
| |
| // CHECK: @_ZTV1A.local = private unnamed_addr constant { [4 x i32] } { [4 x i32] [i32 0, i32 trunc (i64 sub (i64 ptrtoint ({ i8*, i8* }** @_ZTI1A.rtti_proxy to i64), i64 ptrtoint (i32* getelementptr inbounds ({ [4 x i32] }, { [4 x i32] }* @_ZTV1A.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (void (%class.A*)* @_ZN1A3fooEv.stub to i64), i64 ptrtoint (i32* getelementptr inbounds ({ [4 x i32] }, { [4 x i32] }* @_ZTV1A.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (void (%class.A*)* @_ZN1A3barEv.stub to i64), i64 ptrtoint (i32* getelementptr inbounds ({ [4 x i32] }, { [4 x i32] }* @_ZTV1A.local, i32 0, i32 0, i32 2) to i64)) to i32)] }, align 4 |
| // @_ZTV1A = unnamed_addr alias { [4 x i32] }, { [4 x i32] }* @_ZTV1A.local |
| |
| // A::foo() is still available for other modules to use since it is not marked with private or internal linkage. |
| // CHECK: define void @_ZN1A3fooEv(%class.A* nocapture %this) unnamed_addr |
| // CHECK-NEXT: entry: |
| // CHECK-NEXT: ret void |
| // CHECK-NEXT: } |
| |
| // The proxy that we take a reference to in the vtable has hidden visibility and external linkage so it can be used only by other modules in the same DSO. A::foo() is inlined into this stub since it is defined in the same module. |
| // CHECK: define hidden void @_ZN1A3fooEv.stub(%class.A* nocapture %0) unnamed_addr #{{[0-9]+}} comdat |
| // CHECK-NEXT: entry: |
| // CHECK-NEXT: ret void |
| // CHECK-NEXT: } |
| |
| // A::bar() is called within the module but not defined, even though the VTable for A is emitted here |
| // CHECK: declare void @_ZN1A3barEv(%class.A*) unnamed_addr |
| |
| // The stub for A::bar() is made private, so it will not appear in the symbol table and is only used in this module. We tail call here because A::bar() is not defined in the same module. |
| // CHECK: define hidden void @_ZN1A3barEv.stub(%class.A* %0) unnamed_addr {{#[0-9]+}} comdat { |
| // CHECK-NEXT: entry: |
| // CHECK-NEXT: tail call void @_ZN1A3barEv(%class.A* %0) |
| // CHECK-NEXT: ret void |
| // CHECK-NEXT: } |
| |
| void A::foo() {} |
| void A_foo(A *a) { a->foo(); } |
| void A_bar(A *a) { a->bar(); } |
