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[rust.git] / src / test / mir-opt / copy_propagation.rs
1 // Copyright 2016 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
4 //
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
10
11 fn test(x: u32) -> u32 {
12     let y = x;
13     y
14 }
15
16 fn main() { }
17
18 // END RUST SOURCE
19 // START rustc.node4.CopyPropagation.before.mir
20 //  bb0: {
21 //      _2 = _1;
22 //      _4 = _2;
23 //      _3 = _4;
24 //      _5 = _3;
25 //      _0 = _5;
26 //      return;
27 //  }
28 // END rustc.node4.CopyPropagation.before.mir
29 // START rustc.node4.CopyPropagation.after.mir
30 //  bb0: {
31 //      _0 = _1;
32 //      return;
33 //  }
34 // END rustc.node4.CopyPropagation.after.mir