gccrs: Add regression test

This new test highlight the fix for issue #2657.

gcc/testsuite/ChangeLog:

	* rust/compile/match_break.rs: New test.

Signed-off-by: Pierre-Emmanuel Patry <pierre-emmanuel.patry@embecosm.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/gcc/testsuite/rust/compile/match_break.rs b/gcc/testsuite/rust/compile/match_break.rs
new file mode 100644
index 0000000..d5aca86
--- /dev/null
+++ b/gcc/testsuite/rust/compile/match_break.rs
@@ -0,0 +1,14 @@
+// { dg-additional-options "-frust-compile-until=ast" }
+enum Nat {
+    S(Box<Nat>),
+    Z,
+}
+fn test(x: &mut Nat) {
+    let mut p = &mut *x;
+    loop {
+        match p {
+            &mut Nat::Z => break,
+            &mut Nat::S(ref mut n) => p = &mut *n,
+        }
+    }
+}