[COMMITTED 2/9] gccrs: Add testcase for matches!() macro

[arthur . cohen]

From: Arthur Cohen <arthur.co...@embecosm.com>

This adds a testcase for issue #2129.

gcc/testsuite/ChangeLog:

        * rust/execute/torture/matches_macro.rs: New test.
---
 .../rust/execute/torture/matches_macro.rs     | 30 +++++++++++++++++++
 1 file changed, 30 insertions(+)
 create mode 100644 gcc/testsuite/rust/execute/torture/matches_macro.rs

diff --git a/gcc/testsuite/rust/execute/torture/matches_macro.rs 
b/gcc/testsuite/rust/execute/torture/matches_macro.rs
new file mode 100644
index 00000000000..7b61570727d
--- /dev/null
+++ b/gcc/testsuite/rust/execute/torture/matches_macro.rs
@@ -0,0 +1,30 @@
+macro_rules! matches {
+    ($expression:expr, $($pattern:pat)|+ $( if $guard:expr ),*) => {
+        match $expression {
+            $($pattern)|+ => true,
+            _ => false,
+        }
+    }
+}
+
+pub fn should_match() -> bool {
+    matches!(1, 1)
+}
+
+pub fn shouldnt() -> bool {
+    matches!(1, 2)
+}
+
+fn main() -> i32 {
+    let mut retval = 2;
+
+    if should_match() {
+        retval -= 1;
+    }
+
+    if !shouldnt() {
+        retval -= 1;
+    }
+
+    retval
+}
-- 
2.42.1