1 // Check the layout of the vtable for a normal class. 2 3 // RUN: %clang_cc1 %s -triple=aarch64-unknown-fuchsia -O1 -S -o - -emit-llvm -fexperimental-relative-c++-abi-vtables | FileCheck %s 4 5 // We should be emitting comdats for each of the virtual function stubs and RTTI proxies 6 // CHECK: $_ZN1A3fooEv.stub = comdat any 7 // CHECK: $_ZTI1A.rtti_proxy = comdat any 8 9 // VTable contains offsets and references to the hidden symbols 10 // The vtable definition itself is private so we can take relative references to 11 // it. The vtable symbol will be exposed through a public alias. 12 // CHECK: @_ZTV1A.local = private 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*)* @_ZN1A3fooEv.stub 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)] }, align 4 13 // CHECK: @_ZTVN10__cxxabiv117__class_type_infoE = external global i8* 14 // CHECK: @_ZTS1A = constant [3 x i8] c"1A\00", align 1 15 // CHECK: @_ZTI1A = 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) }, align 8 16 17 // The stub should be in a comdat 18 // CHECK: @_ZTI1A.rtti_proxy = hidden unnamed_addr constant { i8*, i8* }* @_ZTI1A, comdat 19 20 // The vtable symbol is exposed through an alias. 21 // @_ZTV1A = dso_local unnamed_addr alias { [3 x i32] }, { [3 x i32] }* @_ZTV1A.local 22 23 // CHECK: define void @_ZN1A3fooEv(%class.A* nocapture %this) unnamed_addr 24 // CHECK-NEXT: entry: 25 // CHECK-NEXT: ret void 26 // CHECK-NEXT: } 27 28 // This function should be in a comdat 29 // CHECK: define hidden void @_ZN1A3fooEv.stub(%class.A* nocapture %0) unnamed_addr #{{[0-9]+}} comdat 30 // CHECK-NEXT: entry: 31 // CHECK-NEXT: ret void 32 // CHECK-NEXT: } 33 34 class A { 35 public: 36 virtual void foo(); 37 }; 38 39 void A::foo() {} 40 41 void A_foo(A *a) { 42 a->foo(); 43 } 44