[gcc/devel/rust/master] tests: add tests for deprecated attribute scanning

[Thomas Schwinge <tschwinge@gcc.gnu.org>]

https://gcc.gnu.org/g:0c290e7c6f3a227829ffe70d8fd9280f1a1da668

commit 0c290e7c6f3a227829ffe70d8fd9280f1a1da668
Author: liushuyu <liushuyu011@gmail.com>
Date:   Sat Jun 11 20:27:46 2022 -0600

    tests: add tests for deprecated attribute scanning

Diff:
---
 gcc/testsuite/rust/compile/attr_deprecated.rs   | 14 ++++++++++++++
 gcc/testsuite/rust/compile/attr_deprecated_2.rs | 11 +++++++++++
 2 files changed, 25 insertions(+)

diff --git a/gcc/testsuite/rust/compile/attr_deprecated.rs b/gcc/testsuite/rust/compile/attr_deprecated.rs
new file mode 100644
index 00000000000..01bc9c41502
--- /dev/null
+++ b/gcc/testsuite/rust/compile/attr_deprecated.rs
@@ -0,0 +1,14 @@
+#[deprecated(since="1.0", note="do not use this function")]
+fn test1() {}
+
+#[deprecated]
+fn test() {}
+
+#[deprecated = "a different message"]
+fn test2() {}
+
+fn main() {
+    test(); // { dg-warning ".attr_deprecated::test. is deprecated" }
+    test1(); // { dg-warning ".attr_deprecated::test1. is deprecated: do not use this function" }
+    test2(); // { dg-warning ".attr_deprecated::test2. is deprecated: a different message" }
+}
diff --git a/gcc/testsuite/rust/compile/attr_deprecated_2.rs b/gcc/testsuite/rust/compile/attr_deprecated_2.rs
new file mode 100644
index 00000000000..66f4ce3b076
--- /dev/null
+++ b/gcc/testsuite/rust/compile/attr_deprecated_2.rs
@@ -0,0 +1,11 @@
+#[deprecated(since="1.0")]
+fn test1() {}
+
+// { dg-excess-errors "unknown meta item ...." }
+#[deprecated(invalid="invalid")]
+fn test2() {}
+
+fn main() {
+    test1(); // { dg-warning ".attr_deprecated_2::test1. is deprecated" }
+    test2();
+}