From 89ea69ab238d1d61d00a44e72061f6794d937255 Mon Sep 17 00:00:00 2001
From: Matthew Jasper <mjjasper1@gmail.com>
Date: Sat, 25 May 2019 20:13:53 +0100
Subject: [PATCH] Add a test for simple matches

---
 src/test/mir-opt/simple-match.rs | 39 ++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100644 src/test/mir-opt/simple-match.rs

diff --git a/src/test/mir-opt/simple-match.rs b/src/test/mir-opt/simple-match.rs
new file mode 100644
index 0000000000000..fc1a3bb1bf453
--- /dev/null
+++ b/src/test/mir-opt/simple-match.rs
@@ -0,0 +1,39 @@
+// Test that we don't generate unnecessarily large MIR for very simple matches
+
+fn match_bool(x: bool) -> usize {
+    match x {
+        true => 10,
+        _ => 20,
+    }
+}
+
+fn main() {}
+
+
+// END RUST SOURCE
+// START rustc.match_bool.mir_map.0.mir
+// bb0: {
+//     FakeRead(ForMatchedPlace, _1);
+//     switchInt(_1) -> [false: bb3, otherwise: bb2];
+// }
+// bb1 (cleanup): {
+//     resume;
+// }
+// bb2: {
+//     falseEdges -> [real: bb4, imaginary: bb3];
+// }
+// bb3: {
+//     _0 = const 20usize;
+//     goto -> bb5;
+// }
+// bb4: {
+//     _0 = const 10usize;
+//     goto -> bb5;
+// }
+// bb5: {
+//     goto -> bb6;
+// }
+// bb6: {
+//     return;
+// }
+// END rustc.match_bool.mir_map.0.mir