Add dllexport default ctor closure PCH regression test for PR31121

Follow up to r287774

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@287793 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/PCH/dllexport-default-arg-closure.cpp b/test/PCH/dllexport-default-arg-closure.cpp
new file mode 100644 (file)
index 0000000..892f1eb
--- /dev/null
+++ b/test/PCH/dllexport-default-arg-closure.cpp
@@ -0,0 +1,26 @@
+// Make sure we emit the MS ABI default ctor closure with PCH.
+//
+// Test this without pch.
+// RUN: %clang_cc1 -fms-extensions -triple x86_64-windows-msvc -std=c++11 -include %s -emit-llvm -o - %s | FileCheck %s
+
+// Test with pch.
+// RUN: %clang_cc1 -fms-extensions -triple x86_64-windows-msvc -std=c++11 -emit-pch -o %t %s
+// RUN: %clang_cc1 -fms-extensions -triple x86_64-windows-msvc -std=c++11 -include-pch %t -emit-llvm -o - %s | FileCheck %s
+
+#ifndef HEADER
+#define HEADER
+
+struct __declspec(dllexport) Foo {
+  enum E { E0 } e;
+  Foo(E e = E0) : e(e) {}
+};
+
+// Demangles as:
+// void Foo::`default constructor closure'(void)
+// CHECK: define weak_odr dllexport void @"\01??_FFoo@@QEAAXXZ"(%struct.Foo*{{.*}})
+// CHECK:   call %struct.Foo* @"\01??0Foo@@QEAA@W4E@0@@Z"(%struct.Foo* {{.*}}, i32 0)
+
+#else
+
+
+#endif