From dc53e561a12cf63a0e0677a5abd7469f315fdfb0 Mon Sep 17 00:00:00 2001
From: Daniel Xu <dlxu2@yahoo.com>
Date: Sat, 25 Feb 2017 17:02:19 -0600
Subject: [PATCH] Add compile fail test for SIMD

---
 src/test/compile-fail/feature-gate-simd.rs | 23 ++++++++++++++++++++++
 src/tools/tidy/src/features.rs             |  1 -
 2 files changed, 23 insertions(+), 1 deletion(-)
 create mode 100644 src/test/compile-fail/feature-gate-simd.rs

diff --git a/src/test/compile-fail/feature-gate-simd.rs b/src/test/compile-fail/feature-gate-simd.rs
new file mode 100644
index 0000000000000..168e84aa128c0
--- /dev/null
+++ b/src/test/compile-fail/feature-gate-simd.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.
+
+
+// pretty-expanded FIXME #23616
+
+#[repr(simd)]
+struct RGBA {
+    r: f32,
+    g: f32,
+    b: f32,
+    a: f32
+}
+//~^^^^^^ ERROR SIMD types are experimental and possibly buggy (see issue #27731)
+
+pub fn main() {}
diff --git a/src/tools/tidy/src/features.rs b/src/tools/tidy/src/features.rs
index 3e951c85589f8..d3c4378f9e75d 100644
--- a/src/tools/tidy/src/features.rs
+++ b/src/tools/tidy/src/features.rs
@@ -167,7 +167,6 @@ pub fn check(path: &Path, bad: &mut bool) {
 
     // FIXME get this whitelist empty.
     let whitelist = vec![
-        "simd",
         "stmt_expr_attributes",
         "cfg_target_thread_local", "unwind_attributes",
     ];