1 // RUN: %clang_cc1 -triple x86_64-unknown-unknown -std=c++11 -emit-llvm -o - %s | FileCheck %s 2 3 __attribute__((internal_linkage)) void f() {} 4 // CHECK-DAG: define internal void @_ZL1fv 5 6 class A { 7 public: 8 static int y __attribute__((internal_linkage)); 9 static int y2 [[clang::internal_linkage]]; 10 // CHECK-DAG: @_ZN1A1yE = internal global 11 // CHECK-DAG: @_ZN1A2y2E = internal global 12 void f1() __attribute__((internal_linkage)); 13 // CHECK-DAG: define internal void @_ZN1A2f1Ev 14 void f2() __attribute__((internal_linkage)) {} 15 // CHECK-DAG: define internal void @_ZN1A2f2Ev 16 static void f4() __attribute__((internal_linkage)) {} 17 // CHECK-DAG: define internal void @_ZN1A2f4Ev 18 A() __attribute__((internal_linkage)) {} 19 // CHECK-DAG: define internal void @_ZN1AC1Ev 20 // CHECK-DAG: define internal void @_ZN1AC2Ev 21 ~A() __attribute__((internal_linkage)) {} 22 // CHECK-DAG: define internal void @_ZN1AD1Ev 23 // CHECK-DAG: define internal void @_ZN1AD2Ev 24 }; 25 26 int A::y; 27 int A::y2; 28 29 void A::f1() { 30 } 31 32 // Forward declaration w/o an attribute. 33 class B; 34 35 // Internal_linkage on a class affects all its members. 36 class __attribute__((internal_linkage)) B { 37 public: 38 B() {} 39 // CHECK-DAG: define internal void @_ZNL1BC1Ev 40 // CHECK-DAG: define internal void @_ZNL1BC2Ev 41 ~B() {} 42 // CHECK-DAG: define internal void @_ZNL1BD1Ev 43 // CHECK-DAG: define internal void @_ZNL1BD2Ev 44 void f() {}; 45 // CHECK-DAG: define internal void @_ZNL1B1fEv 46 static int x; 47 // CHECK-DAG: @_ZNL1B1xE = internal global 48 }; 49 50 int B::x; 51 52 // Forward declaration with the attribute. 53 class __attribute__((internal_linkage)) C; 54 class C { 55 public: 56 static int x; 57 // CHECK-DAG: @_ZNL1C1xE = internal global 58 }; 59 60 int C::x; 61 62 __attribute__((internal_linkage)) void g(); 63 void g() {} 64 // CHECK-DAG: define internal void @_ZL1gv() 65 66 void use() { 67 A a; 68 a.f1(); 69 a.f2(); 70 A::f4(); 71 f(); 72 int &Y = A::y; 73 int &Y2 = A::y2; 74 B b; 75 b.f(); 76 int &XX2 = B::x; 77 g(); 78 int &XX3 = C::x; 79 } 80
