Auto merge of #30337 - wesleywiser:mir_switch, r=nikomatsakis

Fixes #29574

1 files changed, 48 insertions, 0 deletions

diff --git a/src/test/run-pass/mir_trans_switch.rs b/src/test/run-pass/mir_trans_switch.rs
new file mode 100644
index 00000000000..c32d9da724d
--- /dev/null
+++ b/src/test/run-pass/mir_trans_switch.rs
@@ -0,0 +1,48 @@
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#![feature(rustc_attrs)]
+
+enum Abc {
+    A(u8),
+    B(i8),
+    C,
+    D,
+}
+
+#[rustc_mir]
+fn foo(x: Abc) -> i32 {
+    match x {
+        Abc::C => 3,
+        Abc::D => 4,
+        Abc::B(_) => 2,
+        Abc::A(_) => 1,
+    }
+}
+
+#[rustc_mir]
+fn foo2(x: Abc) -> bool {
+    match x {
+        Abc::D => true,
+        _ => false
+    }
+}
+
+fn main() {
+    assert_eq!(1, foo(Abc::A(42)));
+    assert_eq!(2, foo(Abc::B(-100)));
+    assert_eq!(3, foo(Abc::C));
+    assert_eq!(4, foo(Abc::D));
+
+    assert_eq!(false, foo2(Abc::A(1)));
+    assert_eq!(false, foo2(Abc::B(2)));
+    assert_eq!(false, foo2(Abc::C));
+    assert_eq!(true, foo2(Abc::D));
+}