derek.holloway
7502bf64a4
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71 lines
3.1 KiB
C++
71 lines
3.1 KiB
C++
// 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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// No function pointer! This one goes on @llvm.global_ctors.
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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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// No function pointer! This one goes on @llvm.global_ctors.
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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 = private constant ptr @"??__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.1 = private constant ptr @"??__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.2 = private constant ptr @"??__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.3 = private constant ptr @"??__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 [3 x { i32, ptr, ptr }]
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// CHECK: [{ i32, ptr, ptr } { i32 200, ptr @"??__Ex@simple_init@@YAXXZ", ptr @"?x@simple_init@@3HA" }, { i32, ptr, ptr } { i32 400, ptr @"??__Ey@simple_init@@YAXXZ", ptr @"?y@simple_init@@3HA" }, { i32, ptr, ptr } { i32 65535, ptr @_GLOBAL__sub_I_pragma_init_seg.cpp, ptr 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 [4 x ptr]
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// CHECK: [ptr @__cxx_init_fn_ptr,
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// CHECK: ptr @__cxx_init_fn_ptr.1,
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// CHECK: ptr @__cxx_init_fn_ptr.2,
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// CHECK: ptr @__cxx_init_fn_ptr.3], section "llvm.metadata"
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