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     // Make sure the function actually gets instantiated.
  18     test(0);
  19 }
  20
  21 // END RUST SOURCE
  22 // START rustc.test.CopyPropagation.before.mir
  23 //  bb0: {
  24 //      ...
  25 //      _2 = _1;
  26 //      ...
  27 //      _0 = _2;
  28 //      ...
  29 //      return;
  30 //  }
  31 // END rustc.test.CopyPropagation.before.mir
  32 // START rustc.test.CopyPropagation.after.mir
  33 //  bb0: {
  34 //      ...
  35 //      _0 = _1;
  36 //      ...
  37 //      return;
  38 //  }
  39 // END rustc.test.CopyPropagation.after.mir