src/test/compile-fail/asm-out-assign-imm.rs

   1 // Copyright 2012-2015 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 // ignore-s390x
  12 // ignore-emscripten
  13 // ignore-powerpc
  14 // ignore-sparc
  15
  16 #![feature(asm)]
  17
  18 fn foo(x: isize) { println!("{}", x); }
  19
  20 #[cfg(any(target_arch = "x86",
  21           target_arch = "x86_64",
  22           target_arch = "arm",
  23           target_arch = "aarch64"))]
  24 pub fn main() {
  25     let x: isize;
  26     x = 1; //~ NOTE first assignment
  27     foo(x);
  28     unsafe {
  29         asm!("mov $1, $0" : "=r"(x) : "r"(5));
  30         //~^ ERROR cannot assign twice to immutable variable `x`
  31         //~| NOTE cannot assign twice to immutable
  32     }
  33     foo(x);
  34 }
  35
  36 #[cfg(not(any(target_arch = "x86",
  37               target_arch = "x86_64",
  38               target_arch = "arm",
  39               target_arch = "aarch64")))]
  40 pub fn main() {}