1// RUN: %clang_cc1 -emit-llvm %s -o - | FileCheck %s
2namespace foo {
3
4// CHECK-NOT: @a = global i32
5extern "C" int a;
6
7// CHECK-NOT: @_ZN3foo1bE = global i32
8extern int b;
9
10// CHECK: @_ZN3foo1cE = global i32
11int c = 5;
12
13// CHECK-NOT: @_ZN3foo1dE
14extern "C" struct d;
15
16}
17
18namespace test1 {
19  namespace {
20    struct X {};
21  }
22  extern "C" {
23    // CHECK: @test1_b = global
24    X test1_b = X();
25  }
26  void *use = &test1_b;
27  // CHECK: @_ZN5test13useE = global
28}
29
30namespace test2 {
31  namespace {
32    struct X {};
33  }
34
35  // CHECK: @test2_b = global
36  extern "C" X test2_b;
37  X test2_b;
38}
39
40extern "C" {
41  static int unused_var;
42  static int unused_fn() { return 0; }
43
44  __attribute__((used)) static int internal_var;
45  __attribute__((used)) static int internal_fn() { return 0; }
46
47  __attribute__((used)) static int duplicate_internal_var;
48  __attribute__((used)) static int duplicate_internal_fn() { return 0; }
49
50  namespace N {
51    __attribute__((used)) static int duplicate_internal_var;
52    __attribute__((used)) static int duplicate_internal_fn() { return 0; }
53  }
54
55  // CHECK: @llvm.used = appending global {{.*}} @internal_var {{.*}} @internal_fn
56
57  // CHECK-NOT: @unused
58  // CHECK-NOT: @duplicate_internal
59  // CHECK: @internal_var = alias internal i32* @_Z12internal_var
60  // CHECK-NOT: @unused
61  // CHECK-NOT: @duplicate_internal
62  // CHECK: @internal_fn = alias internal i32 ()* @_Z11internal_fnv
63  // CHECK-NOT: @unused
64  // CHECK-NOT: @duplicate_internal
65}
66