1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
|
//@ compile-flags: -O
//@ only-x86_64
#![crate_type = "rlib"]
#![allow(asm_sub_register)]
use std::arch::asm;
use std::mem::MaybeUninit;
// CHECK-LABEL: @int
#[no_mangle]
pub unsafe fn int(x: MaybeUninit<i32>) -> MaybeUninit<i32> {
let y: MaybeUninit<i32>;
asm!("/*{}{}*/", in(reg) x, out(reg) y);
y
}
// CHECK-LABEL: @inout
#[no_mangle]
pub unsafe fn inout(mut x: i32) -> MaybeUninit<u32> {
let mut y: MaybeUninit<u32>;
asm!("/*{}*/", inout(reg) x => y);
asm!("/*{}*/", inout(reg) y => x);
asm!("/*{}*/", inlateout(reg) x => y);
asm!("/*{}*/", inlateout(reg) y => x);
y
}
|
