1 // RUN: %clang_cc1 %s -triple=i686-pc-win32 -fms-extensions -emit-llvm -o - | FileCheck %s
2
3 int f();
4
5 // CHECK: $"?x@selectany_init@@3HA" = comdat any
6 // CHECK: $"?x@?$A@H@explicit_template_instantiation@@2HB" = comdat any
7 // CHECK: $"?x@?$A@H@implicit_template_instantiation@@2HB" = comdat any
8
9 namespace simple_init {
10 #pragma init_seg(compiler)
11 int x = f();
12 // CHECK: @"?x@simple_init@@3HA" = dso_local global i32 0, align 4
13 // CHECK: @__cxx_init_fn_ptr = private constant void ()* @"??__Ex@simple_init@@YAXXZ", section ".CRT$XCC"
14
15 #pragma init_seg(lib)
16 int y = f();
17 // CHECK: @"?y@simple_init@@3HA" = dso_local global i32 0, align 4
18 // CHECK: @__cxx_init_fn_ptr.1 = private constant void ()* @"??__Ey@simple_init@@YAXXZ", section ".CRT$XCL"
19
20 #pragma init_seg(user)
21 int z = f();
22 // CHECK: @"?z@simple_init@@3HA" = dso_local global i32 0, align 4
23 // No function pointer! This one goes on @llvm.global_ctors.
24 }
25
26 #pragma init_seg(".asdf")
27
28 namespace internal_init {
29 namespace {
30 int x = f();
31 // CHECK: @"?x@?A0x{{[^@]*}}@internal_init@@3HA" = internal global i32 0, align 4
32 // CHECK: @__cxx_init_fn_ptr.2 = private constant void ()* @"??__Ex@?A0x{{[^@]*}}@internal_init@@YAXXZ", section ".asdf"
33 }
34 }
35
36 namespace selectany_init {
37 int __declspec(selectany) x = f();
38 // CHECK: @"?x@selectany_init@@3HA" = weak_odr dso_local global i32 0, comdat, align 4
39 // CHECK: @__cxx_init_fn_ptr.3 = private constant void ()* @"??__Ex@selectany_init@@YAXXZ", section ".asdf", comdat($"?x@selectany_init@@3HA")
40 }
41
42 namespace explicit_template_instantiation {
43 template <typename T> struct A { static const int x; };
44 template <typename T> const int A<T>::x = f();
45 template struct A<int>;
46 // CHECK: @"?x@?$A@H@explicit_template_instantiation@@2HB" = weak_odr dso_local global i32 0, comdat, align 4
47 // CHECK: @__cxx_init_fn_ptr.4 = private constant void ()* @"??__E?x@?$A@H@explicit_template_instantiation@@2HB@@YAXXZ", section ".asdf", comdat($"?x@?$A@H@explicit_template_instantiation@@2HB")
48 }
49
50 namespace implicit_template_instantiation {
51 template <typename T> struct A { static const int x; };
52 template <typename T> const int A<T>::x = f();
g()53 int g() { return A<int>::x; }
54 // CHECK: @"?x@?$A@H@implicit_template_instantiation@@2HB" = linkonce_odr dso_local global i32 0, comdat, align 4
55 // CHECK: @__cxx_init_fn_ptr.5 = private constant void ()* @"??__E?x@?$A@H@implicit_template_instantiation@@2HB@@YAXXZ", section ".asdf", comdat($"?x@?$A@H@implicit_template_instantiation@@2HB")
56 }
57
58 // ... and here's where we emitted user level ctors.
59 // CHECK: @llvm.global_ctors = appending global [1 x { i32, void ()*, i8* }]
60 // CHECK: [{ i32, void ()*, i8* } { i32 65535, void ()* @_GLOBAL__sub_I_pragma_init_seg.cpp, i8* null }]
61
62 // We have to mark everything used so we can survive globalopt, even through
63 // LTO. There's no way LLVM could really understand if data in the .asdf
64 // section is really used or dead.
65 //
66 // CHECK: @llvm.used = appending global [6 x i8*]
67 // CHECK: [i8* bitcast (void ()** @__cxx_init_fn_ptr to i8*),
68 // CHECK: i8* bitcast (void ()** @__cxx_init_fn_ptr.1 to i8*),
69 // CHECK: i8* bitcast (void ()** @__cxx_init_fn_ptr.2 to i8*),
70 // CHECK: i8* bitcast (void ()** @__cxx_init_fn_ptr.3 to i8*),
71 // CHECK: i8* bitcast (void ()** @__cxx_init_fn_ptr.4 to i8*),
72 // CHECK: i8* bitcast (void ()** @__cxx_init_fn_ptr.5 to i8*)], section "llvm.metadata"
73