1 files changed, 15 insertions, 0 deletions
diff --git a/tests/mir-opt/deduplicate_blocks.rs b/tests/mir-opt/deduplicate_blocks.rs
new file mode 100644
index 000000000..2b9eed99e
--- /dev/null
+++ b/tests/mir-opt/deduplicate_blocks.rs
@@ -0,0 +1,15 @@
+// unit-test: DeduplicateBlocks
+
+// EMIT_MIR deduplicate_blocks.is_line_doc_comment_2.DeduplicateBlocks.diff
+pub const fn is_line_doc_comment_2(s: &str) -> bool {
+    match s.as_bytes() {
+        [b'/', b'/', b'/', b'/', ..] => false,
+        [b'/', b'/', b'/', ..] => true,
+        [b'/', b'/', b'!', ..] => true,
+        _ => false,
+    }
+}
+
+fn main() {
+    is_line_doc_comment_2("asd");
+}