src/test/ui/asm/asm-out-read-uninit.rs

   1 // ignore-s390x
   2 // ignore-emscripten
   3 // ignore-powerpc
   4 // ignore-powerpc64
   5 // ignore-powerpc64le
   6 // ignore-sparc
   7 // ignore-sparc64
   8 // ignore-mips
   9 // ignore-mips64
  10
  11 #![feature(llvm_asm)]
  12
  13 fn foo(x: isize) { println!("{}", x); }
  14
  15 #[cfg(any(target_arch = "x86",
  16           target_arch = "x86_64",
  17           target_arch = "arm",
  18           target_arch = "aarch64"))]
  19 pub fn main() {
  20     let x: isize;
  21     unsafe {
  22         llvm_asm!("mov $1, $0" : "=r"(x) : "r"(x));
  23         //~^ ERROR use of possibly-uninitialized variable: `x`
  24     }
  25     foo(x);
  26 }
  27
  28 #[cfg(not(any(target_arch = "x86",
  29               target_arch = "x86_64",
  30               target_arch = "arm",
  31               target_arch = "aarch64")))]
  32 pub fn main() {}