clang/test/CodeGenCXX/anonymous-namespaces.cpp

   1 // RUN: %clang_cc1 -fcxx-exceptions -fexceptions -triple x86_64-apple-darwin10 -emit-llvm %s -o - > %t
   2 // RUN: FileCheck %s -check-prefix=CHECK-1 < %t
   3 // RUN: FileCheck %s -check-prefix=CHECK-2 < %t
   4
   5 int f();
   6
   7 namespace {
   8   // CHECK-1: @_ZN12_GLOBAL__N_11bE = internal global i32 0
   9   // CHECK-1: @_ZN12_GLOBAL__N_11cE = internal global i32 0
  10   // CHECK-1: @_ZN12_GLOBAL__N_12c2E = internal global i32 0
  11   // CHECK-1: @_ZN12_GLOBAL__N_11D1dE = internal global i32 0
  12   // CHECK-1: @_ZN12_GLOBAL__N_11aE = internal global i32 0
  13   int a = 0;
  14
  15   int b = f();
  16
  17   static int c = f();
  18
  19   // Note, we can't use an 'L' mangling for c or c2 (like GCC does) based on
  20   // the 'static' specifier, because the variable can be redeclared without it.
  21   extern int c2;
  22   int g() { return c2; }
  23   static int c2 = f();
  24
  25   class D {
  26     static int d;
  27   };
  28
  29   int D::d = f();
  30
  31   // Check for generation of a VTT with internal linkage
  32   // CHECK-1: @_ZTSN12_GLOBAL__N_11X1EE = internal constant
  33   struct X {
  34     struct EBase { };
  35     struct E : public virtual EBase { virtual ~E() {} };
  36   };
  37
  38   // CHECK-1-LABEL: define internal noundef i32 @_ZN12_GLOBAL__N_13fooEv()
  39   int foo() {
  40     return 32;
  41   }
  42
  43   // CHECK-1-LABEL: define internal noundef i32 @_ZN12_GLOBAL__N_11A3fooEv()
  44   namespace A {
  45     int foo() {
  46       return 45;
  47     }
  48   }
  49 }
  50
  51 int concrete() {
  52   return a + foo() + A::foo();
  53 }
  54
  55 void test_XE() { throw X::E(); }
  56
  57 // Miscompile on llvmc plugins.
  58 namespace test2 {
  59   struct A {
  60     template <class T> struct B {
  61       static void foo() {}
  62     };
  63   };
  64   namespace {
  65     struct C;
  66   }
  67
  68   // CHECK-2-LABEL: define{{.*}} void @_ZN5test24testEv()
  69   // CHECK-2:   call void @_ZN5test21A1BINS_12_GLOBAL__N_11CEE3fooEv()
  70   void test() {
  71     A::B<C>::foo();
  72   }
  73
  74   // CHECK-2-LABEL: define internal void @_ZN5test21A1BINS_12_GLOBAL__N_11CEE3fooEv()
  75 }
  76
  77 namespace {
  78
  79 int bar() {
  80   extern int a;
  81   return a;
  82 }
  83
  84 } // namespace