Add test to check if inlining works for any operand

src/test/mir-opt/inline-any-operand.rs

@@ -0,0 +1,39 @@
+// 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: -Z span_free_formats
+
+// Tests that MIR inliner works for any operand
+
+fn main() {
+    println!("{}", bar());
+}
+
+#[inline(always)]
+fn foo(x: i32, y: i32) -> bool {
+    x == y
+}
+
+fn bar() -> bool {
+    let f = foo;
+    f(1, -1)
+}
+
+// END RUST SOURCE
+// START rustc.bar.Inline.after.mir
+// ...
+// bb0: {
+//     ...
+//     _0 = Eq(move _3, move _4);
+//     ...
+//     return;
+// }
+// ...
+// END rustc.bar.Inline.after.mir