clang/test/CodeGenCXX/pragma-visibility.cpp

   1 // RUN: %clang_cc1 -triple i386-unknown-unknown -emit-llvm -o - %s | FileCheck %s
   2
   3 #pragma GCC visibility push(hidden)
   4 struct x {
   5   static int y;
   6 };
   7 #pragma GCC visibility pop
   8 int x::y = 10;
   9 // CHECK: @_ZN1x1yE = hidden global
  10
  11 #pragma GCC visibility push(hidden)
  12 struct __attribute((visibility("default"))) x2 {
  13   static int y;
  14 };
  15 int x2::y = 10;
  16 // CHECK: @_ZN2x21yE ={{.*}} global
  17 #pragma GCC visibility pop
  18
  19 #pragma GCC visibility push(hidden)
  20 template<class T> struct x4 {
  21   static int y;
  22 };
  23 #pragma GCC visibility pop
  24 template<> int x4<int>::y = 10;
  25 // CHECK: @_ZN2x4IiE1yE = hidden global i32
  26
  27 #pragma GCC visibility push(hidden)
  28 template<int x> int f() { return x; }
  29 extern "C" int g() { return f<3>(); }
  30 #pragma GCC visibility pop
  31 // CHECK-LABEL: define hidden i32 @g()
  32 // CHECK-LABEL: define linkonce_odr hidden noundef i32 @_Z1fILi3EEiv()
  33
  34 #pragma GCC visibility push(hidden)
  35 template<class T> struct x5 {
  36   void y();
  37 };
  38 #pragma GCC visibility pop
  39 template<> void x5<int>::y() {}
  40 // CHECK-LABEL: define hidden void @_ZN2x5IiE1yEv
  41
  42 #pragma GCC visibility push(hidden)
  43 namespace n __attribute((visibility("default"))) {
  44   void f() {}
  45   // CHECK-LABEL: define{{.*}} void @_ZN1n1fEv
  46 }
  47 #pragma GCC visibility pop
  48
  49 namespace n __attribute((visibility("default")))  {
  50 #pragma GCC visibility push(hidden)
  51   void g() {}
  52   // CHECK-LABEL: define hidden void @_ZN1n1gEv
  53 #pragma GCC visibility pop
  54 }
  55
  56 namespace test2 {
  57 #pragma GCC visibility push(default)
  58 #pragma GCC visibility push(hidden)
  59   struct foo { // foo is hidden
  60   };
  61 #pragma GCC visibility pop
  62   struct foo; // declaration is ok, we ignore the default in the stack
  63   template<typename T>
  64   struct bar { // bar is default
  65     static void f(){}
  66   };
  67 #pragma GCC visibility pop
  68   void zed() {
  69     bar<foo>::f();
  70     bar<int>::f();
  71   }
  72   // CHECK-LABEL: define linkonce_odr hidden void @_ZN5test23barINS_3fooEE1fEv
  73   // CHECK-LABEL: define linkonce_odr void @_ZN5test23barIiE1fEv
  74 }