From a29d8545b573d008e364571a83fcd865748a8ad8 Mon Sep 17 00:00:00 2001
From: John Kåre Alsaker <john.kare.alsaker@gmail.com>
Date: Thu, 16 Nov 2017 10:08:19 +0100
Subject: Make inline assembly volatile if it has no outputs. Fixes #46026

---
 src/test/codegen/no-output-asm-is-volatile.rs | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)
 create mode 100644 src/test/codegen/no-output-asm-is-volatile.rs

(limited to 'src/test/codegen')

diff --git a/src/test/codegen/no-output-asm-is-volatile.rs b/src/test/codegen/no-output-asm-is-volatile.rs
new file mode 100644
index 00000000000..457d706a8ff
--- /dev/null
+++ b/src/test/codegen/no-output-asm-is-volatile.rs
@@ -0,0 +1,26 @@
+// 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.
+
+// compile-flags: -O
+
+// ignore-asmjs
+
+#![feature(asm)]
+#![crate_type = "lib"]
+
+// Check that inline assembly expressions without any outputs
+// are marked as having side effects / being volatile
+
+// CHECK-LABEL: @assembly
+#[no_mangle]
+pub fn assembly() {
+    unsafe { asm!("") }
+// CHECK: tail call void asm sideeffect "", {{.*}}
+}
-- 
cgit 1.4.1-3-g733a5