From 12c330c4bf53af24d7c10a8e2270e34f3d0b8efb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Linus=20F=C3=A4rnstrand?= <faern@faern.net>
Date: Tue, 29 May 2018 16:00:01 +0200
Subject: [PATCH] Add test for intrinsics::bswap

---
 src/test/run-pass/ctfe/bswap-const.rs | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 src/test/run-pass/ctfe/bswap-const.rs

diff --git a/src/test/run-pass/ctfe/bswap-const.rs b/src/test/run-pass/ctfe/bswap-const.rs
new file mode 100644
index 00000000000..b951a9b72b1
--- /dev/null
+++ b/src/test/run-pass/ctfe/bswap-const.rs
@@ -0,0 +1,23 @@
+// Copyright 2017 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(core_intrinsics)]
+
+use std::intrinsics;
+
+const SWAPPED_U8: u8 = unsafe { intrinsics::bswap(0x12_u8) };
+const SWAPPED_U16: u16 = unsafe { intrinsics::bswap(0x12_34_u16) };
+const SWAPPED_I32: i32 = unsafe { intrinsics::bswap(0x12_34_56_78_i32) };
+
+fn main() {
+    assert_eq!(SWAPPED_U8, 0x12);
+    assert_eq!(SWAPPED_U16, 0x34_12);
+    assert_eq!(SWAPPED_I32, 0x78_56_34_12);
+}