73 lines
3.3 KiB
C++
73 lines
3.3 KiB
C++
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// RUN: %clang_cc1 %s -triple=i686-pc-win32 -fms-extensions -emit-llvm -o - | FileCheck %s
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int f();
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// CHECK: $"?x@selectany_init@@3HA" = comdat any
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// CHECK: $"?x@?$A@H@explicit_template_instantiation@@2HB" = comdat any
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// CHECK: $"?x@?$A@H@implicit_template_instantiation@@2HB" = comdat any
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namespace simple_init {
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#pragma init_seg(compiler)
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int x = f();
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// CHECK: @"?x@simple_init@@3HA" = dso_local global i32 0, align 4
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// CHECK: @__cxx_init_fn_ptr = private constant void ()* @"??__Ex@simple_init@@YAXXZ", section ".CRT$XCC"
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#pragma init_seg(lib)
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int y = f();
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// CHECK: @"?y@simple_init@@3HA" = dso_local global i32 0, align 4
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// CHECK: @__cxx_init_fn_ptr.1 = private constant void ()* @"??__Ey@simple_init@@YAXXZ", section ".CRT$XCL"
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#pragma init_seg(user)
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int z = f();
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// CHECK: @"?z@simple_init@@3HA" = dso_local global i32 0, align 4
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// No function pointer! This one goes on @llvm.global_ctors.
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}
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#pragma init_seg(".asdf")
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namespace internal_init {
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namespace {
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int x = f();
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// CHECK: @"?x@?A0x{{[^@]*}}@internal_init@@3HA" = internal global i32 0, align 4
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// CHECK: @__cxx_init_fn_ptr.2 = private constant void ()* @"??__Ex@?A0x{{[^@]*}}@internal_init@@YAXXZ", section ".asdf"
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}
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}
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namespace selectany_init {
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int __declspec(selectany) x = f();
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// CHECK: @"?x@selectany_init@@3HA" = weak_odr dso_local global i32 0, comdat, align 4
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// CHECK: @__cxx_init_fn_ptr.3 = private constant void ()* @"??__Ex@selectany_init@@YAXXZ", section ".asdf", comdat($"?x@selectany_init@@3HA")
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}
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namespace explicit_template_instantiation {
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template <typename T> struct A { static const int x; };
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template <typename T> const int A<T>::x = f();
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template struct A<int>;
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// CHECK: @"?x@?$A@H@explicit_template_instantiation@@2HB" = weak_odr dso_local global i32 0, comdat, align 4
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// CHECK: @__cxx_init_fn_ptr.4 = private constant void ()* @"??__E?x@?$A@H@explicit_template_instantiation@@2HB@@YAXXZ", section ".asdf", comdat($"?x@?$A@H@explicit_template_instantiation@@2HB")
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}
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namespace implicit_template_instantiation {
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template <typename T> struct A { static const int x; };
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template <typename T> const int A<T>::x = f();
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int g() { return A<int>::x; }
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// CHECK: @"?x@?$A@H@implicit_template_instantiation@@2HB" = linkonce_odr dso_local global i32 0, comdat, align 4
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// 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")
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}
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// ... and here's where we emitted user level ctors.
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// CHECK: @llvm.global_ctors = appending global [1 x { i32, void ()*, i8* }]
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// CHECK: [{ i32, void ()*, i8* } { i32 65535, void ()* @_GLOBAL__sub_I_pragma_init_seg.cpp, i8* null }]
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// We have to mark everything used so we can survive globalopt, even through
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// LTO. There's no way LLVM could really understand if data in the .asdf
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// section is really used or dead.
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//
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// CHECK: @llvm.used = appending global [6 x i8*]
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// CHECK: [i8* bitcast (void ()** @__cxx_init_fn_ptr to i8*),
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// CHECK: i8* bitcast (void ()** @__cxx_init_fn_ptr.1 to i8*),
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// CHECK: i8* bitcast (void ()** @__cxx_init_fn_ptr.2 to i8*),
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// CHECK: i8* bitcast (void ()** @__cxx_init_fn_ptr.3 to i8*),
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// CHECK: i8* bitcast (void ()** @__cxx_init_fn_ptr.4 to i8*),
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// CHECK: i8* bitcast (void ()** @__cxx_init_fn_ptr.5 to i8*)], section "llvm.metadata"
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