Add compile-fail test for unwind_attributes

Test copied from src/test/codegen/extern-functions.rs.

Refs: https://github.com/rust-lang/rust/issues/39059

1 files changed, 28 insertions, 0 deletions

diff --git a/src/test/compile-fail/feature-gate-unwind-attributes.rs b/src/test/compile-fail/feature-gate-unwind-attributes.rs
new file mode 100644
index 00000000000..c8f9cd943cd
--- /dev/null
+++ b/src/test/compile-fail/feature-gate-unwind-attributes.rs
@@ -0,0 +1,28 @@
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// compile-flags: -C no-prepopulate-passes
+
+#![crate_type = "lib"]
+
+extern {
+// CHECK: Function Attrs: nounwind
+// CHECK-NEXT: declare void @extern_fn
+    fn extern_fn();
+// CHECK-NOT: Function Attrs: nounwind
+// CHECK: declare void @unwinding_extern_fn
+    #[unwind] //~ ERROR #[unwind] is experimental
+    fn unwinding_extern_fn();
+}
+
+pub unsafe fn force_declare() {
+    extern_fn();
+    unwinding_extern_fn();
+}