mirror of
https://github.com/rust-lang/rust.git
synced 2025-11-04 06:56:14 +00:00
38 lines
852 B
Rust
38 lines
852 B
Rust
//@ assembly-output: emit-asm
|
|
//@ compile-flags: -Copt-level=1
|
|
//@ only-x86_64
|
|
//@ ignore-sgx
|
|
#![crate_type = "rlib"]
|
|
|
|
// CHECK-LABEL: old_style
|
|
// CHECK: movq %{{.*}}, %rax
|
|
// CHECK: orq $1, %rax
|
|
// CHECK: retq
|
|
#[no_mangle]
|
|
pub fn old_style(a: *mut u8) -> *mut u8 {
|
|
(a as usize | 1) as *mut u8
|
|
}
|
|
|
|
// CHECK-LABEL: cheri_compat
|
|
// CHECK: movq %{{.*}}, %rax
|
|
// CHECK: orq $1, %rax
|
|
// CHECK: retq
|
|
#[no_mangle]
|
|
pub fn cheri_compat(a: *mut u8) -> *mut u8 {
|
|
let old = a as usize;
|
|
let new = old | 1;
|
|
let diff = new.wrapping_sub(old);
|
|
a.wrapping_add(diff)
|
|
}
|
|
|
|
// CHECK-LABEL: definitely_not_a_null_pointer
|
|
// CHECK: movq %{{.*}}, %rax
|
|
// CHECK: orq $1, %rax
|
|
// CHECK: retq
|
|
#[no_mangle]
|
|
pub fn definitely_not_a_null_pointer(a: *mut u8) -> *mut u8 {
|
|
let old = a as usize;
|
|
let new = old | 1;
|
|
a.wrapping_sub(old).wrapping_add(new)
|
|
}
|