src/test/ui/asm/const.rs

   1 // min-llvm-version: 10.0.1
   2 // only-x86_64
   3 // run-pass
   4 // revisions: mirunsafeck thirunsafeck
   5 // [thirunsafeck]compile-flags: -Z thir-unsafeck
   6
   7 #![feature(asm, global_asm)]
   8
   9 fn const_generic<const X: usize>() -> usize {
  10     unsafe {
  11         let a: usize;
  12         asm!("mov {}, {}", out(reg) a, const X);
  13         a
  14     }
  15 }
  16
  17 const fn constfn(x: usize) -> usize {
  18     x
  19 }
  20
  21 fn main() {
  22     unsafe {
  23         let a: usize;
  24         asm!("mov {}, {}", out(reg) a, const 5);
  25         assert_eq!(a, 5);
  26
  27         let b: usize;
  28         asm!("mov {}, {}", out(reg) b, const constfn(5));
  29         assert_eq!(b, 5);
  30
  31         let c: usize;
  32         asm!("mov {}, {}", out(reg) c, const constfn(5) + constfn(5));
  33         assert_eq!(c, 10);
  34     }
  35
  36     let d = const_generic::<5>();
  37     assert_eq!(d, 5);
  38 }
  39
  40 global_asm!("mov eax, {}", const 5);
  41 global_asm!("mov eax, {}", const constfn(5));
  42 global_asm!("mov eax, {}", const constfn(5) + constfn(5));