vendor/clang/clang-release_350-r216957

1 files changed, 72 insertions, 0 deletions

diff --git a/test/CodeGenCXX/pragma-init_seg.cpp b/test/CodeGenCXX/pragma-init_seg.cpp
new file mode 100644
index 000000000000..3f9ff217e6b6
--- /dev/null
+++ b/test/CodeGenCXX/pragma-init_seg.cpp
@@ -0,0 +1,72 @@
+// RUN: %clang_cc1 %s -triple=i686-pc-win32 -fms-extensions -emit-llvm -o - | FileCheck %s
+
+int f();
+
+// CHECK: $"\01?x@selectany_init@@3HA" = comdat any
+// CHECK: $"\01?x@?$A@H@explicit_template_instantiation@@2HB" = comdat any
+// CHECK: $"\01?x@?$A@H@implicit_template_instantiation@@2HB" = comdat any
+
+namespace simple_init {
+#pragma init_seg(compiler)
+int x = f();
+// CHECK: @"\01?x@simple_init@@3HA" = global i32 0, align 4
+// CHECK: @__cxx_init_fn_ptr = private constant void ()* @"\01??__Ex@simple_init@@YAXXZ", section ".CRT$XCC"
+
+#pragma init_seg(lib)
+int y = f();
+// CHECK: @"\01?y@simple_init@@3HA" = global i32 0, align 4
+// CHECK: @__cxx_init_fn_ptr1 = private constant void ()* @"\01??__Ey@simple_init@@YAXXZ", section ".CRT$XCL"
+
+#pragma init_seg(user)
+int z = f();
+// CHECK: @"\01?z@simple_init@@3HA" = global i32 0, align 4
+// No function pointer!  This one goes on @llvm.global_ctors.
+}
+
+#pragma init_seg(".asdf")
+
+namespace internal_init {
+namespace {
+int x = f();
+// CHECK: @"\01?x@?A@internal_init@@3HA" = internal global i32 0, align 4
+// CHECK: @__cxx_init_fn_ptr2 = private constant void ()* @"\01??__Ex@?A@internal_init@@YAXXZ", section ".asdf"
+}
+}
+
+namespace selectany_init {
+int __declspec(selectany) x = f();
+// CHECK: @"\01?x@selectany_init@@3HA" = weak_odr global i32 0, comdat $"\01?x@selectany_init@@3HA", align 4
+// CHECK: @__cxx_init_fn_ptr3 = private constant void ()* @"\01??__Ex@selectany_init@@YAXXZ", section ".asdf", comdat $"\01?x@selectany_init@@3HA"
+}
+
+namespace explicit_template_instantiation {
+template <typename T> struct A { static const int x; };
+template <typename T> const int A<T>::x = f();
+template struct A<int>;
+// CHECK: @"\01?x@?$A@H@explicit_template_instantiation@@2HB" = weak_odr global i32 0, comdat $"\01?x@?$A@H@explicit_template_instantiation@@2HB", align 4
+// CHECK: @__cxx_init_fn_ptr4 = private constant void ()* @"\01??__Ex@?$A@H@explicit_template_instantiation@@2HB@YAXXZ", section ".asdf", comdat $"\01?x@?$A@H@explicit_template_instantiation@@2HB"
+}
+
+namespace implicit_template_instantiation {
+template <typename T> struct A { static const int x; };
+template <typename T> const int A<T>::x = f();
+int g() { return A<int>::x; }
+// CHECK: @"\01?x@?$A@H@implicit_template_instantiation@@2HB" = linkonce_odr global i32 0, comdat $"\01?x@?$A@H@implicit_template_instantiation@@2HB", align 4
+// CHECK: @__cxx_init_fn_ptr5 = private constant void ()* @"\01??__Ex@?$A@H@implicit_template_instantiation@@2HB@YAXXZ", section ".asdf", comdat $"\01?x@?$A@H@implicit_template_instantiation@@2HB"
+}
+
+// ... and here's where we emitted user level ctors.
+// CHECK: @llvm.global_ctors = appending global [1 x { i32, void ()*, i8* }]
+// CHECK: [{ i32, void ()*, i8* } { i32 65535, void ()* @_GLOBAL__sub_I_pragma_init_seg.cpp, i8* null }]
+
+// We have to mark everything used so we can survive globalopt, even through
+// LTO.  There's no way LLVM could really understand if data in the .asdf
+// section is really used or dead.
+//
+// CHECK: @llvm.used = appending global [6 x i8*]
+// CHECK: [i8* bitcast (void ()** @__cxx_init_fn_ptr to i8*),
+// CHECK: i8* bitcast (void ()** @__cxx_init_fn_ptr1 to i8*),
+// CHECK: i8* bitcast (void ()** @__cxx_init_fn_ptr2 to i8*),
+// CHECK: i8* bitcast (void ()** @__cxx_init_fn_ptr3 to i8*),
+// CHECK: i8* bitcast (void ()** @__cxx_init_fn_ptr4 to i8*),
+// CHECK: i8* bitcast (void ()** @__cxx_init_fn_ptr5 to i8*)], section "llvm.metadata"